rrtst7410812392n869ad3a1766, · the generated patterns are the standard offset carrier -type 10...
TRANSCRIPT
rRtSt7410812392N869AD3A1766,
WILLIAM
v.;FRISE
7176 GALE RD
ATLAS MI
48411
J Color Power.EICO gives you the most professional
color power for your instrument dollar.000
INTRODUCING THE VALUE LEADER IN BATTERY -OPERATED PORTABLESOLID STATE COLOR GENERATORS-EICO 385!
Exclusive Features Compact "Tote -Easy" Design Computer -Type Circuitry Double Sided PC Board Construction Low Price
The versatile "go everywhere" EICO 385 solid state color generator, packaged in an exclusive compactportable/storage case, has been designed to furnish the service technician with five essential functions.The generated patterns are the standard offset carrier -type 10 color bars,precision dots, crosshatch, and an individual series of vertical andhorizontal lines.Advanced computer -type circuitry, coupled with three temperaturecompensated crystals, provides the drift -free stability inherent inthis instrument. A multipurpose color -coded gun killer with itsconvenient socket -adaptor assembly, (no more fumbling) storesin the case. Clips directly to TV antenna terminals (fast & sure!).The EICO 385 is powered by six long -life "C" cells or the ACadaptor accessory. The economical package containsall you need to enable you to do a fast yet reliable job.Easy -to -assemble Kit: $Wired: $109.95
EICO's complete Color TV Lab for the proPraised by the pros for Hboratory precisiur.
Model 369 Sweep/Marker Generator. For easiest, fastest visualalignment of color or b/w TV and FM RF and IF circuits.Five sweep ranges from 3-220 MHz. Four marker ranges from2-225 MHz. Crystal marker oscillator. Post injection ofmarkers. $99.95 Kit, $149.95 wired.
Model 435 DirectCoupled Wideband Scope. Top-quality DC -4.5MHz scope with 3" flat -face. CRT Zener calibrator:Outperforms 5" scopes, facilitates on -location color TV andother servicing. $119.95 Kit, $169.95 wired.
New Model 235 Professional VTVM. Designed especially for solid-state servicing.Accurate to as little as 0.01 volts on its 1/2 -volt scale. RMS/p-p/DS/ohms in 7 overlapping
ranges. Big six-inch meter, 200 ua movement. $49.95 Kit, $69.95 wired.
NEW EICO 633 Portable All -Solid -State CRT Tester andRejuvenator. Rapidly tests andrejuvenates color as well asblack and white picture tubes.Line adjustment control, 12different filament voltages,individual voltages applied totwo of the grids, accurate meter- all insure precise measure-ments. Continuity and leakagechecked through transistorizedVOM, read directly on meter.$69.95 Kit, $99.95 wired.
NEW EICO 635 Deluxe All -Purpose Portable Tube Tester.Thoroughly professional,full -range modern versatility.Tests all standard tubes andeven the new decals, magnovals,7 -pin nuvistors, and popularTV picture tubes. "Take -it -anywhere" design expressed in amodern, rugged, scuff -proof,luggage case. Compact (4"H,121/2-w, 9"D) and lightweight,41/2 lbs. Quick, accurate,dependable and the price ismodest.$44.95 Kit, $69.95 wired.
414J M7071411
NEW EICO PSI -1 Solid -State Signal Injector Probe.Perfect for on -the -spot signal tracing in the field.Pen -size, self -powered, self-contained signal generatorfrom 1,000 Hz with harmonics to 30 MHz. Idealfor trouble -shooting audio, IF & RF circuitry in anyelectronic equipment, transistorized or vacuumtube. Use it once - you'll never want to be without it!$5.95 Kit, $9.95 wired.
FREE 1969 CATALOGEICO Electronic Instrument Co., Inc.283 Malta Street, Brooklyn, N.Y. 11207
Send me FREE catalog describing the full EICOline of 200 best buys, and name of nearest dealer.
Name
Address
City
State Zip
. . . for more details circle 114 on postcard
GROUP
WF-
WF - 7
450 8 P -P
7875 %
- 2
800 P
60 %
WF -8
42 ),
7875%
ELECTRONICTECHNICIAN / DEALER
COMPLETE MANUFACTURER S' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
SCHEMATIC NO.
AIRLINE 1229 OLYMPIC 1231
TV Models GHJ-14829A,GHJ-14849B, GHJ-14859B
Color TV Chassis CTC3 1
DUMONT 1230 PHILCO-FORD 1233Color TV Chassis 120926, 28 TV Chassis 19L21
MOTOROLA 1232 SYLVANIA 1234TV Chassis TS613 Series
SYMBOL DESCRIPTION AIRLINE
C20A.B.C.D---40µf (Al 200µf 18) 250µ1 ICI10µ111)) 250vdc 034-020000
C115---15pf 4kv 10% disc cer 825-150016R13 ---3.8K 5w 10% 063 362510R74-9.6 r) thermistor 057-056500R164---12 il 20w 10% 053.120310R26A,8---contr vol w/switch SW1 055-067000R28A,B---vert hid bright 055.067100R69---vert lin .5M 055.035000R71 ---height 5M 055.035100R111---horiz frog adj 50K 055.041700R123---horiz hold 75K 055.032000SR20---diode sel horiz AFC 003.002000SRI 50---rec sil 1.0a 900 PIV 004-003500AT-83---xtormer audio output 031-1.1116301FC-23A---filter choke 032-0023011.128A -coil peak 111-012800L202 ---coil horiz fret) 110-020200L203-xformer sound take -off 4.5MHz trap 109-020300L204--xformer IF output video det 109.0204001206A -coil sound goad 109-020601L262---def yoke 027-026200L265 ---coil IF input sound trap 109.026500L266 ---coil IF interstage 109.026600L267 ---coil choke 2 used 111.026700L302---xformer sound interstage 109.030200L388 ---coil line filter 111.038800TR7813---xformer vert output 033.007802TR89---autotormer 033.008900TR94---xformer horiz output 033.009400
printed circuit board 073.041200F19 ---circuit brkr 099.001900CC206---couplate, sync take -off 134-020800
7875
PART NO.
!ELECTRONIC TECHNICIAN/DEALER is pub-lished monthly by Harbrace Publications,Inc., Harbrace Building, Duluth, Minnesota55802. a subsidiary of Harcourt, Brace &World, Inc. Subscription rates: One year $5,two years $8. three years $10, in the UnitedStates and Canada. Other countries: Oneyear 39. two years $14, three years $18.Single copies 60g. Second class postage paidat Dansville, New York and at additionalmailing offices. Copyright 1969 by HarbracePublications. Inc.POSTMASTER: Send Form 3579 to ELEC-TRONIC TECHNICIAN/DEALER, HarbraceBuilding, Duluth, Minnesota 55802.
6F-4
580 P -P
60 %
WI -10
. -
7875%
WF-I3
. P -P
I
TV Chassis A04-3
WF-5
150v P P
601,
165.
71375
1265IF INPUTB
7875'1' SOUND TRAPr -
TOP41 25
,
Toc MHz'
IF INPUT1FROm 1W TuNER1
TO "B.AGC OUTPUTITO VHF TuNETO
TOB+ OUTPUT70 VHF TUNER)
R302 2K
VTI64EH7
isT IF AMP1,70.1
WF-6
P -P
60 %
WF-12
4z P -P
'P 's
CI70PF
/751/
R324711
3C18 DO820
01,PF
C22001
(-:R33:15K
7TTA L3021/2 6BL8 SOUND INTERSTAGE
SOUND IF AMP TRANS
R154 i495
mr00 112$,3 I
L 3
C15)_
-1R15247 iOOKPF
TP4
R231.11EG
AGC
052
0015T 816610K
VHFANTENNATERMINALS
CR2
r
27PF
TIANTENNA
INPUTTRANS
27PF I.PP PF
I-1
T
v0 -CHI
/BOC
-:;RR 1:-MSP11::Sav
4
L6UHF IFINPUT
*DJ
CID
L2
VI V2
L43405 56274 3
C71114
F IL
4I(-
i5PF
L3E L
4
C0301
UHFINPUT
ACK
"Cr
JHF CIrCHANNEL- -Wr.-ELEC TOR STRIP
ITSKS, ,
'5PF 4 142PF 2PF / Pf
Ci4 017 0I9 020R4
G *OPT;thc15
R7F L.P
L7I F OUTPUT
COIL
1
L
Rs-220K
R3.11.
I (0),61 I!(-4 (5c)-
'R' "c,'
INPUTG
C f
DE! 'PC
-11--1 -RIO
IOMEG C2297 PF .
AG/. NPuT F OuTP .T IINOTES
I ALL RESISTORS ARE la wATT, UNLESS OTH RHISE NOTED7 CAPACITOR VALUES ARE IN MFD WC I SS 111.1FRRict WHIT3 TUNER IS SHOWN IN IFIF CHANNEL POSITION
4E176 L206 ASOUND QUAD COIL
8155 CI%680 .047
CISS RISE
00471 8.2K7451
0513, 01
AUDIOOUT
AUDIO JrIA
LAB,VOLUT5Ad0570001
6 BK
V2AV2 5GJ7
HIRER
CiE, RB5 4 5 688
PF
4
1St LECTOR -
J;[ 4,4 L2.CHAS52 THRU 6 8AD:
VHF - CTIANht7 170171 I.
7 -145
1
V2E31/2 56J 7
/ /It
F R I uTIF B
'L004 Po/NTCtUTPul- -
VHF Tuner Schematic Diagram
VT9 AT elIOGK6 AUDIO OUTPUT
AUDIO OUTPUT TRANSI
SPEAKERS434
19KOS ri
2I 6.,s 1, <I E,Kallay I AP. /MPl^ If
8139100
B.1458
1203. SOUND TAKE -OFF8 4 5MHzTRAP
47 VT6PF PI
106K6L266
IF INTERSTAGE-,COIL
VT4 L208 VT54EH7 IF INTERSTAGE 4EJ7
251C IF AMP TRANS 3RD IF Amp
Mb39
tlK
RI3 3K
CS,.47 22
C209 R4 820
04,.001 0015 56 PI
I.5 4R2
C3001
RI470
RS180
C6560- R8
PFI 470
1204 :44 7IFOUTPUT TRANSB I "
VIDEO DETECTOR 1
IN 2953;
11331
1/PE. , TPI
L128A
41 WA,- -R9 12K
1451
R28100
CI9
1130TPT 220
VIDEO AMP
R182 7K
C12220
TPFR12,10
L127A:
R133.6K5w
"I El'
NOTES.I ALL RESISTORS ARE 1/2 WATT, UNLESS OTHERWISE NOTED2 CAPACITOR VALUES ARE IN MID. UNLESS OTHERWISE NOTED3 VOLTAGE TOLERANCE MAT VARY i 20%4 VOLTAGES MEASURED FROM POINT INDICATED TO CHASSIS GROUND
WITH 'VIVI**, AT NORMAL SIGNAL.S WAVEFORMS TAKEN WITH NORMAL SIGNAL INPUT6 DOTS ON SPEAKERS INDICATE PHASE
1229AIRLINETV Models
GHJ- 14829A.GHJ- 14849B 59B
8
0
JUNE 1969anoxr
yZ-
C8
1126A TPEIwl
R14IR2138,5MEGBRIGHTNESS
VHF Tuner Adjustments
VT323GJP4
PICTURE TUBE
180K
JDAY
R15688.1*
R26A, 1Kc TRAs CONTRAST
CCM,SYNC
TAKE -OFFCOUPLA E
33011
270 PF.01
OF
2.2 MEG
VTIO8107
SYNC AMP 8 VERTICAL OSC.
R51 R53 C53 RS4100K,Ni 506 68110039 6811
VT7B"1/2 6BL8KEYED AGC
AC 1889 8164INTERLOCK Au,0F0RNER 12,20
L388, I110-120vAC60 CYCLES(POLARIZED) 51
ON -OFFSWITCH Y
ION VOL
EPIC TUBE
8167
ITC17I
1
47011 01
BRKT
TO °Ii*VHF TUNER
FIL.
119 060CIRCUIT
BREAKER
TA:
C/64T'
001, IKV
FC23A 250),
N SODsR,50,_2,C20. _ r20c1-200 Lr250250v 2308
,5
R160 (Kg'71-
,4,70,
2w _a 4 v
1-'1' C20010250v
0140.13 0.12 VIII178E3 21005 8E07 IONS
2 2 4 5 5 A
0163)21,1'
PL IDIALLIGHT
VTIO VT6 VT58E07 106K6 4EJ75 4 5 4 5 4
VT8 VT7 VT9 VT44E,47 PIA TUBEIKTR 4016 Me 100% 4EH7
A 5 e . 4 4
-I.0015
ITod' _ C161 C162 I
1
00IT 001T ,
0165
1
R52 C5282K 00,5
-05168PF
Ov
ter -4) R59220K
C1 IC57003956-
TO01-4551 IR64470K
OVF 5
)14106 14102R°122je 1005 1109
SR20
51065220K FRED -7-0056 ,1811,3, 330 PF
COIL 1 I If_AFC (WE 10) 1108,12DE T _.<- R104
I-MEG
RIOT R103390K 390K ,
r4i027K
F it
c(:a)l
TN-IrH- '25%
c,..VT12
C:87i00iCO2
HO LIZ OSC
8? PF 001
VTI I10CW5
VERTICAL OUTPUT
C54, 0114KV
R02670K
/521 9
R501301111, 5%
-37
6 1053-047R61
6 1 SMEG
C58
TO47
R11968K
0
0R71,5MEG
0 HEIGHT
/dm
06i
LIN I
0
R6368
R65 MEG220K
Rv6E9i TS
1LIEG4
v R28A.1 5 MEG
HOVERT HOLD
-r--
8107, 15K
506
R112 0111, 15 R11456K 00 Nor 330K
74.001 ,61.1i1,77Rtii 50K
310111 8116FRED. ADJ
911r - -
'39111
I
C100c1,1
WA 0
7 I
1
R120v5 v
267
12K, 1*
VT 321855
HORIZONTALOUTPUT
Ri6R5647K
AMMO
FOR BEST FOCUS RESULTS RS7CONNECT ORG LEAD TO 6 BKTERMINALS I, 2 OR 3
IS
TR7813VERTICAL
OUTPUTTRANS
C113SOCKET PLUG
9411033
ROOST V
- C/09, 01 v
RI24 L/N 2
391011.---CF-R/i5 CUR
,o 3,470K T ,
:
4
MEG,1W
R123, 7SK
F24."'" HOR1Z HOLD
56K 1--.8
1267
0115115 PI ,4KV
C1171_47PF
48v VTI4178E3
DAMPER
8 25'*EL
MMT
IRED
rDIU
39K,
2 -T1
j_._26%.0EFLEcCoTIILONs_LOKL
8 21-111.51116 68PY I
R74 I
9 6n. THERMISTOR
3* DEFLECTiON YOKEw CONNECTOR STRIPeva (PIN VIEW)
R72 R73 IVERTCOILS
RI17,3 3
TR94HORIZONTAL OUTPUT
TRANS
VTI5IK3
HIGH VOLTAGERECTIFIER
1229 COPYRIGHT 1969 BY ELECTRONIC TECHNicIAN/DEALER HARBRAcE BuiLD1NG DULUTH MINNESOTA 55802
1230DUMONTColor TV Chassis120926, 28
JUNE 1969
ELECTRONIC r/WE=TECHNICIAN / DEALER
COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
VOLTAGE MEASUREMENTS
T. V. CHASSIS 120926, 120928
SYMBOL TU1111 TYPE PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9
V-201 6846 0 IV Fil Fil 80V 80V 0
V-202 6RZ6 0 2V Fil Fil 155V 100V 0
V-203 6AQSA 5.5V Fil Fil 300V 130V 01
V-204 128Y7A ev 6V 0 en Fil Fil 210V 145V 0
V-205 ADM 6-3.5V 7V Fll Fil 190V 190V 7V
V-206 6GN6 190V 193V Fil Fil 360V 370V i 193V
V-207 6877 2V 0 2V Fil Fil 0 165V1
180V 0
V-208 6LF8 0 3.5v 25V Fil Fil 0 -2.SV 160V 185V
V-209 6kA8 125V -10V 15V Fil Fil 2V 13V 160V -30V
V-301 6GH8A -IV 0.1V 135V Fil Fil 265V L.8V 0 -2V
V-302 6GH8A 200V 0 270V Fil Fil 425V 42V 3.5V -11/
V-303 6GY6 0 IV Fil Fil 230V 125V 0
V-304 60U7 170V 1.50 7V Fll Fil 170V -11/ 7V ill
V-305 6JU8(A) -SOY 0 35V Fil Fil Fil -35V 0 35V
V-306 6007 110V -100V 3V Fll Fil 170V -1V 7 Fil
V-207 6GY6 0 1V Fil Fil 250V 125V 0.
V-308 6GH8A 190V -4V 110V Fil ill 200V 0 2.SV 0
V-3039 6GF7A 0 40V 90V Fil ill 350V 140V -20V
25V -0.5V 0.6V Fil Fil 265V -95V 0.5V FilV-310 6F07A
150V -50V Fil Til Fil -50V 150V 30VV-101 6J26
Adjusted for 25kv Normal PletursV-102 3CU3
4001/ zit1
rti 400V 10S0Pb.V-103 6094
370V Fil,
1
3409 FilV-104 652.48
V-106 CRT
PIN 1 PIN 2 PIN 7 PIN 4 PINS PIN 6 PIN 7 PIN 8 PIN 9
Fil 270V 160V 820V 820V 270V 150V 5kv
PIN 11 PIN 12 PIN 13 PIN 14
270V 150V 820V 1 Fil
Reading with T.V. signal strength.
SYMBOL DESCRIPTION
C102 -80/30/20µf 925686C103 -80/50/20/50W 925586C104 -80/2/25µf 925650
C106-681.if 4K 929096C8101-cir brkr 8082521:X201 -delay lin 709011IC201-integrated cir AFT 815215L105---def yoke 708516L107 ---filter choke 737057L209-4.5MHz trap 708432L221 ---AFT takeoff coil 720576L301---chroma take -off coil 708438L305 ---reactance coil 708439L307---horiz osc coils 708434L309-horiz eff coil 708462R101-vol cant 1M on -off switch (chassis 1209261 391035R101--vol cont 1M on -off switch lchassis1209281 391036R102---tone/bright cont 2.5m/250K 390970R105 ---10K 10w 10% 394260R106---lone/bright cant 2.5m/250K 390970R107 ---video peak/contr cont 50K/368 390963R108 ---tint cont 1.2K 390965R109 ---color cont 50011 390966R111---vert/horiz hold cant 750K/35K 390962R113---vert size cont 3.4M 390908R114-vert lin cant 100K 390785R118 ---13K 7w 10% 394255R121 ---66M 4w 6KV 397176A
PART NO R126---vert horiz hold cont 750K/35K 390962R140 ---video peaking/contr cont 50K/368 390963RV102-thermistor 397187RV103-voltage dep resistor 397188RV104---voltage dep resistor 397191R212---adi sound cant 10K 390954R231 ---sound rei cant 750 12 390883R264---AGC cont 6K 390882RV301-varistor 397171R804 -left rd/grn vert lin cont 150 n 390795R813---rd/grn horiz top lin cont 120 11 390792R815---vert blu tilt cant 80 (1 390793SE102-sel red Ifocusl 817123SW103---AFT switch 510256T101 ---audio output trans 734223T103 ---focus adi trans 708461
T104---vert output trans 738207T105 ---power trans 730157T201 ---sound take-oH trans 720558T202 ---sound IFtrans 7204711203 ---sound quad trans 720472T206 ---2nd video IF trans 720476T208 ---video peak trans 708474T301---bandpass trans 720515T302 ---burst trans 720516T303 ---2nd chroma trans 720575T304---3.58MHz osc trans 720579X301---horiz phase det 817126Y301-3.58MHz crystal 817155
swimma _a &-; ..-
Llt_11 IP,. =SrasiG
<8--A
`Or ,c,,!;?, 1600V
_., a.: `P-101
3-101
LE3P.`,11
C
22'2;S
11
100 MIR 010011Z.201
jPi1277
TOR WA' v 10.17
5229 2 2M1
f 150 -**
C26,..,
J.T
-8.278
R155224
:041% SW 103224 loft 11141 COMIROII
MANUAL Oa? 011/ ,41
4,135.7t I
CC '33 1581.1
25.07,
tI,P0,7204
I C 216
10
3
i
212tt8154
40 AC1675007408U
412SMC1.-20511841
C2I71000 I
,3.0,010, I AMP
V-2051/0111
,Pr 0
2.3s,,,,,700
11044110C,PC,,1C.201
DISCO wow, ANS7.209
7-205,S, 4,010
1C 218150 R 214 R217
44
itliiI 2MF 220 I10411 C 2521
1- 35001,-- .
C if71
C0
L22053117.
[90068I 1.2211, ,401
C 269-- ,;;;,
C2714.470
I
240 v610 , I HIP
V2066G M6
fr[1002260
150
IC6icS3
C 224
R,41. . :4$2a60. ,508
.
C-2211°°0 T
Tio&S547418 y
4
822368
40447000PAIR
sr 272 r7 11
L_
P C - 2 -viDEO, AFT AND SOUND BOARD
50,714,14,11 O. SOUND, AMP
1-201 V-201 SEWS
TPso L:20?111--' 0
5608
P 202474
1-216
BAH
T 2062410 V,010
3 3
C 251
I%M9
tur
.46('-72)(17206121.44
;1.7;T-1 01010 DI!V207, 236:6eljTAMIP.5
'a° V'N°'34o vwo i
1-2°2- 207
50116011
T-202
r-
I'
8.228470
.-1i0004-2 37
Ti00
R3 -211'"I -72°26's
0
8.229104
[10239
550
1`47°I4
50010 01800V-202 61126
A
- B
L209454C TRAP
8.231750
-SOUNL__
REJECT
21356118
8-42R .R 234
22
620108 -
R.
C244 R241
3308
FYN
_ _
6UNE TUNER I 6
610 TUNER
kPo ,Pu 2,111,A, 5,10 C
300VPI.11
11.."'RSCR18'Iy0.,MVSUOun,rsc y-108 essOg 4.1 AMP
I X-3 iNS2A.TAL10114 I 111 VT107 6GJ70SC &MN
11
4914 a runta V 1076L11 a. T 106 1
1
11
1-110 L-111
mew.itv 'CO
DEGAUSSING COILS04 Cl' I
RV .03
1112 L-113
011/ 101
gOtkvc.47F448,Z..ae. NOFF akc7-105
41,08-101
751101
x:.000
*o c 17' T
3 5
r107v104
I 8
P NI
11200 53v
R142NV +140870 PC -2,118 371100
0.12 2 3,1102j N.
ILUIIPUS^PL 11
GRE, 1i1;81504
TO ON T 105
42701ATOPC 2,PiN4 31
8.215
C200.222033
v
22MEG
TP
1200 r UC.24.5.604
C-253 2000 1,1
R254*2700 P"
1000
C-2502--11T 3000
tR.720565
iqvID GC 40,31.40 1. 215.V-2096 56u11° VP
8-257SKAI Rae
Wt.
3 I. 5R-261
4 714(1 542i0v
3,11C SIP
:721113 V209.ISKAS
TP
11 --*-AM------.MEGC-257i2 I
0
331/
R262 21WEi°3
C L.,111153908
ss 228
R265
V.E)
NOR SNAP! G
,_
1-803R 137 R.136 8136 cc
_rrirCC
i.Km 10w0 .000 .000
ICf 006
6,.4_, q ,1C -103C " ?Myf22,` 2'V
1
.C103.4 *C.1038 II5018L-107 T
MAXWOW SOWT4508 , 450 V I
0 MtI
Mt
,1420 0 +405V +270v
,OuRCE SOURCE SOUND
20 VC 60CPS
VALSIkii140v ISOURCE
Ow51 -6014
R807270
100 iwLEFT G
VtRT LiNE1
51 8018 SE 801C
R803,2 1
F1804150
5 C 804 ti; C 805
ra 1_/0UET1101 Tfloor ;Ns /00.
OR LINES LIC11 GNOR LINES
...C801 c
4°82.907v TS183vL.802
c.ge44." Wad22 R1GL;iron VERT LINE*
60- 3W
PC- 880480
r8 816
C-80710ME 100
R 808 60vERTINUI
AMP
50P 8n
vERT
T
4
IC 255/180T '"V
C.102Di40mF1500
4,42) 02NI
R 812SO
0541161
RGHOR
EL=
8104747
SE 80107
120NGNOR
TOPLM(1,40omtsusBLUEvIRT
1=1 P-103N 140
131460
;tvR..1115 60
tlIalLyilia I
124PU
18116.1,0*
C
H
1230 COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH MINNESOTA 55802
A
B
C
30040 OfT TRANS
1.203
1
R209- 456011TP
70
.047 R-210680
UNLESS OTHERWISE SPECIFIED:
*C11111101C OR MICA CAPACITORS IN INCOIARADSI.71 AND 000 V* TUBULAR CAPACITORS IN 181110FARADS(111/A110 400 VRESISTORS 9101461110010001AND VS WATT. ARROWS AT CONTROLS INDICATECLOCKWISE ROTATION. T TOP CON. O. BOTTOM COR/ IN 001/111L1TUNED TRANSPORM11111.
*Coo OUTPUT
V203 6403A T101OIL!!Cz.rrEs
0,8,34,*
AUDIO OUTPUT
MT
Os?
+4050 +140V
R-211 {478 CI02C 103 +
270.111 R-104 ZORN -450V
cao. ratu .c 101
2 SING
R-1024. 4700
4300-5W 7
+405V
TO SP1AKER15) ASRW0
IS10 pc -3,7114 25
1ST 1110 VIDEO SNP
V20SALFA
D-
480N
+140V
112462200
82L 2300403
H
C 238* 3 3
1
I R-2646.2Wtj...c
IT,A2t0
1E263 8 250 }33K2*1000 3911 MI6;
3110 01010 MR
V2041211Y 74
C -A15
200V
P-244ARP150K
"45
Val 1110 .259311 1000
WCIIIOPTAKINGTS.
1268loll
01SOT
DOT
3
R269
/AtW
5600/11
112%2ER
11-2733984W TONTRSORPC 2
440 S2
+405v
=ag
0 +
I
C 10211
4 5030M7
V
2
P-276 63
Er1/401R 274
prop
i0R./OK
270
TOT ON T 105
T-102110111/151FAK OUTPUT TRASIS
52.2=1111-107
118
PI1121.5
11-10510K OW
L-1013110UM
+405V
C-I2$I
COLOR 111)15
V3014 6414114
NTS
c336.6
PC - 3
DUMONT
Color TV Chassis 120926, 28
DEFLECTION AND CHROMA BOARD
PIOP5
KR-303
R-304150K
1
fr7l528TINT':200 tl
it
ir'
i0SASig
KiLL111 017
V.30154ISJUS4681USA
TP C331
03333.4.611I
NUNS, AMP
1/4024 SGNSAC505
C- SAND PASS SUP
V3018 6411124
TP
N,R
C -704r..033-250VL.
M;n1e213
04MririVA4X4
111.11118T TN.
8. 3368
IM
10.000
6 9
306
+270V
R-30739K
SSTPC.110.14 TAN -OFF
L-301 r--;
I 8 I
Sapp} I.
L* c4.7363a
T.0 CC
C30081_.
470 r513,11G
11 7. -
IS:
8 310
81a1gtV
+540 V
11440 PASS TR
T-301
r,IT
71
330
_J
"433C f MOS
e
+270V
2120 CORONA ANN WM 0410144
V302111 'AMU T-303
4031/8 C 13021
R-325
T-302 T1 P
S J3 Ca? 11-341A.
0MEG ?
1..1.1_4.1 t 143418.
C 334 IMEG -
138.-11.
N.7
+405V
C??6NTR.
V-3051CPUS, LAMA
P1111 DIT
OK
T L-304
0
P MATCHED PAIR
6 LAN
R 3421000
8,V3.
Ii3Z110.000
atS2
Ii
+270 V
-330
el
V302?444/.1
01100 111,1111V303 GOYS V304411017
MATCHED PAIR
R -33I56
01100
V307 SAYS
21211
iin,A 'ma
11 16-
IY G
18-T1 AMP.
V30611'GUY
two- iglu NI.31911
111-Y1 AMP+2700 v.3040
62.05 8,47 GOUT
C3 381R01.600V
2 SC irI,
1100 '413E?
C3311 PITR
1-306
T
70T114- 0 -0--C-330
15
C-329*330
8.3371006
11. NV
763 34012
TP
0
PIACTAMCI COST
V30114 601164
C-34340
C-341 I5 I8
so.000Ir3g5
C 342* R-331.1
200v_660
3 SOK eTAL
Y 301
11
3958 OSC
2200
showOK TR
V30/11 SOMA 1-304---
C-347IL
-30710 P1ACT
11COIL
7R 8.357
21. I)8.3.1g %MI R4715P*
C-322
8-360- 47K-IW
2,3,!C-355
75
056353 R4-1102
ICOR8-363
R-3644SS:0a 154(0
thaACA
C-3604 R.37K4118L-301!rn_u0ker.
i[
C 363
a 2v 6000Oot5v
cir T
R-373 83754
I 310% 4X01
11111,75I mC-389 C 42a
6---14---..068 6000 .-
C 161
MOP 'MASI OTT r .,Itil.12d. 124IG
5-30111 X-3018 1160V--R 369%
500K R-3 1 0366- R377-4 1.011EG
4:R.I.572390. 27 120.
IR 324B
IW 7 7
5 0 CHI FT---EP + 405V
C-36111000
SIO
R-125 We-
Hop *COPT.
V310 6,07(4)S 13100
2
C -171 It Non 150)
R 383 CO3,713 OF 11.3 V WIM
-. fT43766
31)*
,NII 0 II
ITIT 2 13108 =c 314 il 1 037
3 F811, 6000'
IX?'of 58Ei, ,n-
s 1 y i 6800wVI -S-5000
Filoge7
:24 3.47, Z 14- ,334.fo-D
MT4 .I.
11-386
-C 370
7 715,48 -211.1... osa9,_4,- _.620
111386 11390220K 336
R 382 t133.83. 1#612 Fau,TO NTFIS ON PC 3-7
4_, 029--_-3.Dle IW
701 ON T-105 +140V
IN +270 V
/1366
11.3654762*
01ST OSC
768942V30114 6/07(4)
C-3841 S7 7526
....04.....,
c- lit, =cob,. i_
6501 ass R410011
S Y.1 T
73097 IR 400
3 3 MEG
12.01701
i.
'21 MG 6C0 V .,... 2.',
2
R-3645C 556 1 5 MEG
1000 ZULU,
PV3010R-397 R 398
SW -301KIN( BIAS SWITCH
+ 403V
S 364CC.35/ 1 51.101000 ULU
C682?
01Z11-393
1"-C 378 ---12200
C382036 1
600V
R-394 N R
tR4K51500.1.
.24K
023-260
22. 11112: m L TOR ii6 AT V 101.-TO PC 2. PIN 55 + 270v ..----
031, 160
vERT 0010.R- TT508
iC 385
-.........,
ITh1
`127. ;4_i
9
V COL22
A 8-144
1000
-4
10
5-351 I271.211
I
+4040
TIM OUTPUT
V30911 1141'7(A)
18t4
1+4050
11000
I. 1. .0 .70J115
-.6.1/ 150..4°5V
A-_= -- iN. 0 R.41 c lo4c 44+256171008
32
+405V
POT - 5)01yoKT
1807 RIO
47,2000
itR -II
+ 405V
3E4 k t 30 NT 5121
TO PC -2,P1/1.67
t VGC 391 *
30111150V
T P
840
1-1442002W
TO PM NAPOON PC
k,-.103cf0I
8 -Ill47 s
2200311
.1:107414(A)SLOG
N;- -
IC 10w51 600
C -114c6COVSI047TO PC31.11423
1 51014405V HS -
10186
0
HON C/NTIRC11001 48 s 16031105 "1. 61"
TO PC -3. PIN 2?
M V P(CTIMA
V102 3CU343C434
0441111
V103110W411
N O 1 E CM/ a OR 1 FOR 120512E1C11116
6.10456u.
v 17(121.MTOP
V104 1118A43
FOCUS FOCUS ADJSILT
3E-102 C O6 T103
6KV
0.107 R -I100
R 121
6r11 }R 1194 71.4002W
s-.8,13 :Z=,010
2110:3,23-
+ 405 V
SE -101SOOST PICT
-112
6000 o
TO NOT, TERM. U
PC -l09_
10.0,
8005710 800ST._...,
12 I
L -I08TOP -SOT PIN
D
T-106OP SOT Pill
TO111.1111
"15K'-13
ISILLISLL1.11.....Ual
C I 4
2 V
RV 1J4
r-- L-105 DEFLECTION YOKE
--: RR
12$
I
I
015, CO,LS T
I
150
I 130
....I
'AL
P-IO2PIN 140
MIL
111114
81110r/p
ci,847-12ISL11 ?g113
1-104 11101
yeolv OUTPUT51 0
C 1o4A+SIV
SW
+20
GRP RID
.,...1.11LCA GIN
-SaCK FPO'
01111
g. Sits 80171 1110.8/mitt
11.CTullt Tullt
, C
V10525X P2225ZP22
RIDStu(
COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH. MINNESOTA 55802
1231RI21
OLYMPIC
Color TV ChassisCTC31
JUNE 1969
8141
*ArCtCONT.
ELECTRONIC /-7---#EmpiTECHNICIAN / DEALER
COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
FPC34722
T201SOUND
TAKE -OFFTRANS.
C2015
V20IA1/2 68N11SOUND I.F. 1-
e-4E+122V R20-120K
. 1C203o v750C202 if.01 R204
- R202 10K270 T(22K) C2I3
R201 I .0147K
1202 V202A
TRANS 1/2 6ADIOSOUND IF- - - -I SOUND DEMOD
120VTP202
C20501
6
R205270 R206
3300
A
+140V
T203SOUND DET.
TRANS
C209047R209560K
R208470K +600V Y.
TO RI84
02106800
I 1 MEG _ILVOL. CONT.-Li
C2I I560
BS
0
V20281/2 6AD1O
AUDIO OUTPUT260V
TP204
5VR210270. 1W
V201 V20268N11 6AD10
H
7204 6./H6C214 15T PIX IF 131 PIX I F
KF
9 GRID TRANS5
140V TP205
R2I I10K
21247K
4725 190110
8213C214 1000
1000* MOOC2I4
72051ST PIX I.F
PLATE TRANS.
3 4
R,47 C219 1 0
LL22
. L202PRINTED R216,150K
1
R
-2 i vo.
470K 5 1- I.5K2I5
11150K) ,R2I7tri
KK TO PIN 4, J102
K
O
TP207V204WWI
222 SYNC SEP R239" MEG3y,,, 4111C AYR33K ,S
.5.7>NOISE CANCI ER
C275
.f273.10C2231000
3
R220100 2Vi C227
C2222c40TJ
pi, ,,..,000_I_ * 11_204
2225 .11.'
"Zag10R i
i'
=00 111K .
L2085.61.1b
V205EJ7
350 RIX IF175V
1 1104AUDIO
OUTPUTEl TRANS
+280V
0154 LI59.001 5.6IJh
c71
=RI25
18 MEG
CI36 001
C166
SPECIAL (RESONANT
CABLE
LS1 c
SPKR
C229 SOUND1.5 DET
C2284560
.1-C239140V
R23122 Olj
MEG, cc -1 g8B.
8241 +280VvvISK
C24001 A ,H02422°0
+140V IPT 1000
3 V R237 0244470K .0T.
470+280V,R238 R240
6.8K. 1W 33K
C 25947
RI38. 33KHORIZ. HOLD L215
CONTROL HORIZ FRED.V20111A
R273,120 SINE WAVE COIL1/2 GAYS
HORIZ. REACTANCE _
CONTROL iv
C266
SR2018--1SR201A
114
R214.
V2046GM6
2ND PIX I.F.
T2062ND PIK IF
TRANS270V
7 140V
6
R2199156
S
4
C224MOM
R246150VIA
,C221 P2181000 SOK
1441--. TO PIN 3, JI02
to
1000
R263 R26527K (330K) 18K
TugR258 R259390K 390K
R260f1.8 MEG 12011
-1C261
C
000">- 2
1- 262
3
R26239K, 1W
R2646.8K
C2635 IC264
3300
V207 V2086LU8 6JW8
,2 5
--- C26*27L1
25V
L
_1000
2.5V
R266330
C268
000
C2221000
L
C269 ,..,,,\ 820 mo
3/
I
R268 2 150K
-34V
)1
R2671500
B
+2110v
1-3
t L207I.eoh
411
2._ 5
047CR102IN60
LI58145.75 MHZTUNING EYEFRED. ADJ.
C165.82 Pf
R22311/IT
2
VIDEO51NB II
4L250N9c)1' /HSI 10K
T207R04., /11
cs".230_L= TRAF, C234
0
F1TRXAINFL.
,4
i\at:vici
00
13_;iliC),,_21...,...7%z
ir. +7,...-1C.RFa2x0r2,..._C233 i 1
FT'i.i.8''
7
100K
+140VV105
6HU6 /EME17TUNING INDICATOR
RI47250K
BRIGHTNESSCONTROL
+280V
L216 R279
3901.1h 141
H 02521000
R244A V207A100K 1/2 6LU8
VERT. OSC.R243 R244 0247 825282K TOOK 1)2 2.7K
C245 IcC244101C2200 VD
44g2rf756-I
3.4i ME I R247I 82K
IHEVERGHTT I g r -1
LL280 CONT I
T 1R108/R111 - Ft, TO L= j i L
ds.
L__....._, VERT. HOLD*AN
-2-199111=1°71 MEASURENOliNOT---I V101* 31
3.3K,CI
3W
C250.039C249.039
'L205.121 -lb
kR224.7501 SOUND REJ1
R2258.2K
8226s
5600S * R227
+1110V,04:2180,
220K
C252 R254
HE47KNV.
39
- L2121.6jh 2'
C237- 33
VERT. LIN. V20788139 1/2 11/U13
(500K VERT. OUTPUT32
SS r1- S
..150VR253, v
039AO -2 5V
R2049 16K 2KV5°ira
26VC251 124(
R241&6800 7C R251C252 330K
ZZ1°°K' 1500 2W
..-181913, 22KCc
R275100
4 V
"qi -T .s2c7,7R256 / , 21(V
TC256+280V1^-,
V 50f / 350V50V I R151, 2.2K,2W
0129sou{sou{, 8278, 3.3 MEG J 150V
+280VB
130V
R2281K
L2I3201.41
IK t
34V
3..-5
R22927K, 2W
R276220C2365/350V
L214uh
R2303.9K
8274
Nir--
- - - -47K
3
ITC34724 R792 V70IA
120L1h11500f1 1/2 6.118
2ND VIDEOIL709
I R724 I H9`\le
+140VC 330K I 2200R767.{ C753
-C17+295v +78V 2W-*" 22KS .221
47KcE + 390
0
I R745
cor10K
...LIOK7201) - 2200Z 8
C 50
LDLIO1
+120V
R702
e-'61111*1(
C7I101
+280V G0 55
Ci51..0033
CONTROL\TRI28. 68
CONTRAST F-.
LF1189 j_ 25V
K
V70IB1/2 6JT8KILLER
3 -7VTP701
V702B +279V
BURST AMPL 1+ 2 °V1/2 6BNII
5
31 -
Csi OV
C7331_R743150K
R709
011\
55V
6 4
100K
R70639K
C70601
/(070582
R7891500
C701
51_31
COLORKILLER
CONTROLRI451 MEG
R100220K
CR702A,IN9I4A
IR738
R_ 10 MEG Po."
R788A-IC7,58,MEG
-R78881 MEG
N C748 180-1c
R799,3.91(51W
T702BURSTTRANS
-I(0758
22
cs,1 / 2V 760B2NAH
BANDPASS
17
+6VC73i01
_LN
- C708-820
TP703
C751I01
C714330
C79901 I -c
C759 330
tEC760330
R7I6A1 MEG
C745.001
SR701
+2110V
R7I5I MEG
C7I5
330
CR701A
IN1114AS
CR701B
R748220
5277 R281.330K
.01
'RI44
_41200TINTI CONT
-7,-
CR702B1N914A
TP704
C703 -
(NOT ON 110ARDI-f
V703A1/2 GGHBA
REACTANCE CONT
4t,C709
i:R746-.6v.01 IR707 1500
33K
I 1C. 707
V703 V7096GH8 6MD8 C
.01
2.5V
R7I327K
1371i680
C7I9.01
C7I8
R477ii9<I7. L 15+
/
--Y7031 58N: 477KC:CC:"7
m 21
ciorr-t-f: 702
\-REACTANCE R722-C724:2
4R771(151WCOIL
I W 4011f/I5V
477 C722, 10
V7038 7K T7031/2 661111A C761 3.58 MC3.58 OSC 05C
+ I TRANS.6 +225V 7_ -.-5
I C723
+280V
V208B1/2 6JW8
HORIZ OSC61(06 OR 6KN6
R270 C272,.005 HOR. OUTPUT> I75V 471( K- I? 6
1,5 R272 °J70V
47K[ RI35
1007
C27I820
2RI7220K
R269 C270 DIw.6.8K
X X /
0 -C102BIOUf350V
2W
R27I2.2K
B
+280V
RI68150K
TO 'Z'(K1NE
RI69220K, 2W
RI73220K
RI94
+105,13V.50ME8G
7
5 R186C° .01 , 33K. 1W
H V. ADJ +I25V Rre78126 3
500K +21807.1WR170
68K,1W
0141
rovt120 470'Cl37
V104A11/2 6F07
H.V. REG
4702.5KV
81525680, 3W
+23VRI53470.0, WW
U
HVRI93390K3W1
R17490K
FI02, 3KVRK GAP
3WeCII547
4KV
RI31, 10HORIZ.CENT.
L115
5.6U
CT
FC
VI023A3A
HI-VOL-. RECT.
RI90,3.3CR10155 FOCUS RECT.
Ci 4,68,4KV CI 13
RI56166
I -C120MEG 130
L106 R159
5 6,,b 100K
-.TO PIN 8, VI0480
V103 82K BOOST6CG3 C111 I
1KVI tijDAMPER .1 I
P-I_C4170332 5KV cr,
C112047
142.Z....8+
7103HI VOLTTRANS
BB
(C132470, 2 5KV
C110.
T106FOCUS
ADJ.
RI65
4.7 MEG2W
+890V
ET/1XV +910V
RED-WHT-BLK
GRN-WHT
+280V
RI84680K R137. 10 4
VERT CENT
+600V270K SOURCE
1W
.18
7102TOPBOTT
PIN
RV102
lO
RED
RED- WHT
BLUL108
TOP aBOTT
ST.
ST.
I. 4
PHASE LFIN7C FIN.
B+ BOOST
AV1016KG6
HORIZ OUTPUT I-8ALTERNATE BASING
IF USED
TP207 (RF AGC)
TP206 (R2I3. R2151IF GRID
TEST SOCKET
PIN VIEW
PIN 2 VI048 BLANKER GRID
TP703 (R752, R703)CHROMA B/P GRID
YEL
c14R122
100
GRN
GRN-WHT
+280V
7
o CI262W
BRN 100
, L111 1_112,
HORIZ COILS
VERT. OUTPUTTRANS1105 RED-
BLKGRN-BLK
RNED
OR
CONV.1103
WHT- BO<
RED WHT
RED
PIN VIEWP106
+280V
VERT. COILS
LI09)YOKE
TEL5
DEFLECTION
GRN
RTI02
5/1. COLD
LI101.
1231 COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH MINNESOTA 55802
A
E
4 4-Hi°z3TRAp v 704A L705 V705AR751
5BANDPASS 1
II/2 6078
620 h ,R13I 6AlpeL 470KTRANS.I I
'X" DEMODCI18.18 6 +240V +1341v N1*
C731 0736 R770C7(3 I 7 - - ' .01 I 9470K
RI6 E33° J CV 13V
(7 --)175I,p8--/ -.
- R769I 470 IL710 RI
1;5.60h F.:
.4.8%, A ---a_g7320NR7301 MEG
...
,.....-----R732,27K,2W 1000
, ; R755G.)
!I <L__
-- LE PI R753 470K R773
- - RI48 250 71615"--- ---L=706 2142702K6?
V705B1/3 68108
-.Vv- 470K7.
R I 78 I
I v-N--.16-71..3AMP304L 7)46COLOR -1-
+280V1 I GO -I- C7
62001 1800/ .01 R768,,c
3.3;CONTROL 2-M 2W i
4
TI
I.°125C732 - ------ - .1%. MEG
NOT ON -.-1,27- _I25.01
BOARD C102C , 54f R39720308350V
+.5v_1,.._:.,.7311 MEG .- 2R2*7731(6R766;
1.2 MEG;3AG COLOR -ON INDICATOR
ACC DETCRIOIBINS I4A
I*4
C10013330
-L ciooA330
R1708I MEG
RI70AI MEG
111
CRIOIA tR1271N914A ).2.2 MEG
A C.C. DET.,
TD P N 8vio4B
CI34560
)1
/R16056K
21
Fl
F
J
RI751.2
MEG
V104E41/2 6F07BLANKER
Ci40.22/400V
I +114V
-55V2
5
C142I.01
+.5V
150K
K
R16It47K2W ,
+2110V
V70413L7041/2 6DT8
.2" DEMOD 6201.1h
i +240V -1.' C73231 C 726.01
OV
3
+111V
V705C1/3 6MDB(B-Y AMPL
R7271 MEG
2
18754.470Ke-NOAr
R776/3,0,
743
.01
R734 II -
27K2W
R774470K
F -280V
iR149750KCOLOR
R1161.5 MEGKINE-BIAS/
M
NO
Pa
riS
1 07 62 _L C762AT18
L7031.811h
NN
L +280,z o X
J
I<co
C170..01
C7577-7 fl'67 661500
Am4680
R787
C738, .01
V704 V702 V7016F7 68 II 6 T84 5 2 I II 5
R16268K
1C139
ISO
P166 +280v2.
390KSW104
SERVICE SWITCHSERV NORM.
2 I
S 6
+ 280V
. ...11LU DOT+280 V .-1-v./1,----RII7
5.6K, 4W --[11bilRED DOT
Rile4K
PIN VIEWP103
6
5 0
3
TO.R150
8177,n 6000nY Ri0 +leov6:3 a ,a
RII315K211/
RISE3IIK V
5R112100K
Rill15
MEG(OLUSCR)
01271 5
MEG*RN
1000 SCR)
CI
+100V
Zb2
YEL- RED
1100V I AWHT-BLU wHT-GIRN
+SOW
Rii0/4/. R109I 5
./1. (REDSCR
MEG
R10111000
B+ BOOST
C1241000
*450031It3
C1251000
YU. - RED
V W G
TEL- BLU
r;HO
/L-
3
VINT- BLU
C R R801*
8, c
82056
2.
6.
BI,zLtAt-,E
R/G-2 180,1W
0
WRIG - L802
02
TOOlY1 0807
, C1303, .22
BLUI
ERT1 HOR/I /
2 BLU 3
volt- RED
R6036100 I
eLv- %Oa0E0-WNT
- r RED I
VERT I NORI /
__J5
11
-C1109,314
CR8015 CR1301C
ROMA 8806k100,1W1
10
CC
R803'Reo4100 100,1W ,2041W C46044 082
R0'3
!SR8C2SD, , A 120
WHYSRN - WHY
GRN
VERY I
GRN
9 frN X60
60
0808V EILUAMPL
GAN TELRED -
F021R812,5C0 V.
DIFR/G
3V DI F TILT
R/G MARL
S 801130
0 Rej,...,ito_R610
pX07 FV814,G12At PL
7/Ef"
1o1Jf, IOV
2C 35072 U JUMPER As REO'D G
EILKTEL
881560
V OLDTILTC JZI
8820MEG
aRN
J
>0CE
CON+
P105 P1045600 35002W 3W
L102=+ + +
CI71
0 I
P189- 680
CI43.001
/77TUNER CONTROL
BRACKET BRACKET
_LRI80I MEG
35
CI 3556
L16033uh
CI451
001/111,413E20
AUX. CONTROLBRACKET
1.001IRIBTI MEG
±C144_L
±C146001 RI83
i MEG
HOR. HOLDAND SWITCH
BRACKET
1948
/R19±6/001
I MEG
PWR SUPPLYCHASSIS BRACKET
NOTES.
RESISTANCE VALUES IN OHMS, K 1000*INDICATES 5% TOLERANCE.
CAPACITANCE VALUES LESS THAN 1IN Uf I ABOVE IN Pf UNLESSOTHERWISE INDICATED
VOLTAGES MEASURED WITH VTVM ANDWITH NO SIGNAL INPUT, AND SHOULDHOLD WITHIN *20% WITH 120VAC SUPPLYCONTROLS SET FOR NORMAL OPERATION
NOTE: THESE READINGS TAKEN WITHPIN 7 v20 IA GROUNDED.
'LATEST PRODUCTION
V10525AP22A OR 25XP22A OR 25FP22AOR 21501.22A PICTURE TUBE
P179470K
YOKE MTGBRACKET
26.5 K.V.(MIN.BRIGHTNESS)
r20 LII2OU5OLli 2350V50Ui200V 350VT350V
18195CIOIC C10113 CIOIA C102A
I5K `-' 0 c' c`2W
Ca 10.001
LI 13 L114
DEGAUSSIP
RVIOI
CI30056 50010
.01 200V
SR103
SR104
R102180K =
R103 CI07F101
150K I I FUSE- V INN- 025 WIRE
5220KC10501
(PART OFVOLUMECONTROL)
SWI020
CB101
SRN
SW102CPART OF --
VOLUME CONTROL
PILOTLIGHT
AP I847
SWITCH rON I
TUNER L _J
SRN
UHFPILOTLIGHT
#1847
RAPID -ONSWITCH(REAR)
L101RAPID -ONREACTOR
-v-,-,-.1
--- iswioiSW102A
cil CONTROL)
(PART OF
47,VOLUME
2K
SLR -RED
C103.047/600V
BLOC
7101FILAMENT TRANS
SRN- Su(
, P
I P P
CV
I
/511' IIXIV P.P.
2711' 7V P.P
79H 100V P.P.
3111 33v P.1-
60HZ120V ACSUPPLY
5101
DG35906- 3
11.1 P.o.rn
itp
AR' ituv P P
TrP
30v 80v P.P.
'NV P.P
30o V P
180V P.P
P
MIN
OLYMPICColor TV Chassis CTC31
TT
RIM
SYMBOL DESCRIPTION OLYMPIC PART NO
ttuunneerr, V
,UHHFF, .....
..............
C101 -A ---25C 20'350v 20,200v elecB, C
C102 -A,B, C---250pf 10)11 350v elec CO34861
OL 101 --delay line
C
00RR 3FLE 3332 4022 89252 536- 4- 321
C114 ---68)7f 10% 4KVC8101 cot
CR101 ---rec Ifocusl
F102 -470p1 .20% 2KV spark gay °L102 ---choke filter
C
CK34653348531
L108 coil pin cushion top and bottom.. CL34090.2R114 ---6K ' 20% 1'2w var blu dr PT32067-17R126 --500K 30% 1 '4w var high v adi P132067.4R137-10 tt WW var vert cen PT32066-17R138 ---33K 20% var horiz hold PT34849R139 ---500K var vert lin P132067.27R140-1 t, 7w WW 5R141 -100K 30% 114w var AGC P 3R2E03674- 21 75
R142 ---100K 20% 1 /2w var vert hold PT32065.28R145 ---1M
'
30% 1 /4w var color killer PR32067.2R146---2501! .120% 1 /4w var contrast PT32065-33R147 ---250K 20% 1 /4w var bright PT32065.30R148---5001/ 20% 1 /2w var color PT32065.29R150 ---3.4M 30% 114w var v.height P132067-24Al 57--1 M with slide sw volume PTRT101---thermistor RE3334779457
RV101---varistor 94RV102---var 15% .a IMA 175v RE34098RE337
T101 -xformer filament TR34648T102---xformer pin cushion
TTRR33440693:1T103---xformer horiz output 501T104---xformer audio output 1833549.1T105---xformer vert output 6T I 06 ---coil focus °L201 ---,dormer 47.25MHz IC111332244141:56L206 ---coil 1201 CK32098.25IL209 ---trap 4.5MHz CL32422-4L215 ---coil horiz frep lin wave osc CL 9T201---xformer sound take-offTR323441731-3T202---xformer sound IF w/C204 /60
cR2E382
4 2 3 - 4
T203---xformer sound det w /68K /R207 8 104/0TR32413.2
T204-xformer 1st oic IF grid TR32444-3T205-xformer 1st pm I
pix IIFFF
TR32444-7p.w1a/tIesou
TR3244-8
T206---xformerT207.turrner 23nrdd
DIz
TR32421 -2CR702A---crystal diode
/C231RF34661
chroma take -off CL32420.3L702 ---coil reactance CL32418-2L705 ---coil peaking 620111
T701---xformer band pass w/C713/ 330
CL32442-14CL32442-2L708 ---coil 620TR32424-2
T702---xformer burst phase TR32419-2T703---xformer 3.58E0C w/C723/ 1511 TR324I1 -3T801 ---coil horiz CL34517
veotkeynckoe vA3nevsesrg SA34504s450n3
C134315Cl 34835C034860
COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH 5,11N^4f-',OTA 55RO.
1232MOTOROLA
TV Chassis TS -613 Series
ELECTRONIC 7 ry---w=TECHNICIAN /
JUNE 1969SYMBOL DESCRIPTION MOTOR
C-806-400a/125v 4011/ 100v 6000/100v2001.1/50v elec 23C85807A33 L -104 ---1st IF & 47.25MHztrap incls C107
E -102 ---diode, crystal video det 48C65837A02 & core 24V68607A31
E -401 ---diode crystal AGC gate 48C67120A02 L-500---horizosc incls core 24068130A03
L -502 --choke horiz suppressor 24065947A86L-505-horiz size 24069183A01L-506---horiz choke 24069044A03
24068523A031800 -choke filter 25067554Al2
48S13498148513498148S134932485134970
(1 -5 -video output Al A- use 48S137002 4851349270.6 -1st 4.5MHz amp A2T 48S1349700 -7 --2nd 4.5MHz amp A2T 48S134970(1 -8 -audio amp AlL 48S134918Q9---audio driver Al L 48S134918Q -10 ---audio output A1C 48S134900
1---AGC gate A28 48S134942(1-12-AGC amp P1C 485134910
L -700 ---yoke, def 114deg
0 -1 -1st IF ampA2Y use 4851349040 -2 -2nd IF ampA2Y- use 48S1349040 -3 -3rd IF ampA 1 u0 -4 --1st video amp Al T
1128 -video tape input A2TT-100---4.5MHztrap & ATO: incls core 24068822A02T -301 -ratio det 24V66550A80T -302 ---audio output 25067552A18
(1 -13 ---noise gate M4842 - use 485134992 4851348420 -14 -sync separator Al V 48S134933Q-15---horizosc A3F 48S1349920-16-horiz pulse shaper P1 C 485134910017---horiz driver AIM 48S1349190-18-horiz output A3H 48S1349950-21---vert discharge P1J 48S1348430-22-yert pulse inv M4842 -use 48S134992 48S134842(1-23---ven driver A1V 48S1349330-24---vea output Al C 48S134900(1-25---AGC delay P1J 48S134943
0 -26 -spot killer M4853 48S134853Q -27 ---microphone input Al L 485134918
485134970
T-500--horiz driver 25087440A03horiz output xformer 24068804A07primary/sec winding only 24067601A23
T600---vert output 25085840823T -800 -power 25068164A08R -120 ---video bias 22K 18066401A35R -130 -contrast: 1K 18067637A70R -133 ---external video bias: 1K 18064401A21R -202 ---bright: 100K 18067637A69R307 ---volume: 50K 18067562A10R-405-RF AGC delay: 18K 18086401A20R-408---vert line: 4K noise gate 75041 opt 3K 18067678A05R-602---vert hold: 3K 18067637A68R-616 vert size: 10 41 18068447A02R-320-varistor audio output 6C66263A16R-617-varistor vert 6C66263A16
VHF tuner DOPTT-411
AC I IFTEELOC
12Won
Co;",.
N1/4,
1110001111C I
POWER SUPPLY
T1300(1307
1
Cal 470
(800 'LI-B E C ILLEUSI
(1000 -II
010,018,024
B401 nib IN scan
01 THRU 03 SETSE 8 C
cow TOEor ..141 "31401 vo.05,017 ALL OTHERS
COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
E -402 -diode crystal AGC amp 48C65837A02E -502 -diode silicon 01K pulse limiter 48S134978E -503 -diode silicon DI D damper 48S134921
OLA PART NO. E -800 ---fuse 65C67985A03E -804 -switch on -off incls mtg brkt 1V68608A03L-101 -41.25MHz trap incls core 24067754A23
RID
C: 1
EB10p,,,,',71i
5
EiTUNER809.E804
6.30
I
200MF
SPARNGAPSIMSOCKETOC
IRA-IIR
UNFILTEREDUNFILTERED85V
8++
B+475V
B+30V
VHF
TUNER
/I UHFEBIOA TUNERONVMF
10011
01
S=SILICON I AIG OR AZYJ 1ST VIDEO I.F.
(Lfi'UV u
8
37.511CIMP
L1034100 12
,41 25 I 41.2518CTRAP - I 11AP
VHFTUNER
"I. -OUTPUT
To NWT 1
Rf AGC
00123
I
T. P.8 gDc u7.50
AGC
DELAY
30V
2.811
oe
2.30g LS. AYE
310P 05- AT 31 Phi
13+30y
1
I. 75S
1.104
42
C134 .001E
ee
02A1G OR A2Y
TRAP 2ND VIDEO I.F.6.50
7V12. V
13. vl
eN1
CIC
R107 33K"AV
AGC
R409 33K
2.45V (4026.201
14AGC DELAY
012PIC
AGC AMP
R412 470
3ST
rig R413 12K
RESISTANCE LESS TRAY 10 NOT INDICATEDS OLTAGI IIA SURIIIINTII. TAKEN FROG POINT INDICATED TO GRASSI! SITE A
VTVII 2 2052 LIRE VOLTAGE MI PTA I MID AT 122V AC.3. * VA R1111 11111 CONTROL SITTINGSA. TARP 11111 CONTRAST CONTROL AT MINIUM AID
ALL OIlER CONTROL, II NORMAL OPERATING POSITION.S. 1111/11 TI10 VOLTAGE! ARE SWAP
VOLTAGE A1000 BOA - I TM PO I I GRAL I
11110R IN IIRTFRIN [RAPPELS AID ANTENNATSUI PALS SPORTED.OLTAGI IN Net - I TM TOWER OP STRONG STATION
ADD 01.773101 ANTENNAv [FORM ISA SUREMENTS
TAKEN IRON POINT INDICATED TO CIIA SSI RITE A11012-111A ND 03C I LLOSCOPRuSCILLOSCOPI SYNCED NUR SNIP RATE INDICATED.TAKEN I TM STRONG SIGNAL CONTRAST CORTEGE ATIA 111111 411 OMB CONTROLS IN MORTAL OPERATING110311.11311
Q6
A2T
1ST 4.5MC AMP
4300 270K
30V
C401
5. 7V
E30V
XT
VIDBIAS
03
3RD VIDEO IFAIU
5.20IS 101 200
L
CC OC
118)12.7
07A2T
2ND 4.5MC AMP1.70
-1111/68"i
1
gra449,550
360
1
PC
OCre,
no'
8 1.1
6
R317 150K
0137 028A2T
CO VIDEOINPUT5-T
C320 C3I1 .05
:1103184, VIDEO
oo,
AUDIO I PAK
p. 'INPUT
8+30V
E103
710
R117 120 -A11/
R119 I8K
C121._ RI16 ISO "3011: SETS
470-1:12K
Ft-WW --...120
10KVIDFO BIAS
_CLI3_12 .01_01.,7
ROTE.VEEN 1111 13 181( son 36.73 JUNCTION OF 8517 &11120 MUST BE 100
221 1 N
1610 ,TIO STOE:
TO 8+1- 75v
0131A4842
NOISE GATE. 96V
.21
R414 22(4MA0
o 11
A2B
AGC GATE
AWR411 100K
12IC I
14
04A2T
VIDEO AMP
2.1
T 100
:lcAUDIO
TAKE OFF
4415 4.7K005 IRSONE SETS
4416 33KAiVe
014A1V
C404 .02SYNC SEP 14 3
6, C4052. .047
pp
U V
SYNC
+30V
365 PP
+30V
- 1 MDICATRII PRINTED C T BOARD112111111113 AND LETFEILS IP BOERS INDICATE TRET POI ST3AND ARE [P0318-131110.110ED TO TIE PARTS LOCATIONILLUSTRATIONS.
UNLESS OTEER151 EPIC I IFD: CAPACITOR DECIMAL VALUt3IN El , ALL OTREILS IN PI. CAPACITANCE VALUES ONLYAll 311011 ON 3CREMATIC DIAGRAM. FOR CONDUITSDR3C11 1 PTIOR Or [A PAC 1113113, ISFIR TO PARTS LIST.
RESISTOR., ARE 109 1,2N UNLESS 02,1E1,1 SE SPEC I I I ED
5
10 c. y4
12
T501
C503)1.001 R50J.4,2K
DIG, R503 100 R507 6.8K
111
AW of A0 We
8
Ig,t04:4. ai_imc
8 C
E501S OT VIII
022§4842 _, 2
VERT OSC11
..,4419 33K -Tr PP v
AW
A3F
HORIZ OSC
L500 gR503
HORIZ390
027
AILEXT AUDIOPRE -AMP
150 INSONE SETS- 8+30V
B++75V
C8I1 5MF
140T200
C131/ 00r2 XS.
RI28 IM
1.112271I
E101
316
08AIL
AUDIO AMP
+500V
+170V
RI29 10K
+170y
22
30V
09 I
AUDIO DRIVER'AIL
28VI
B+
010A1C
AUDIO OUTPUT
4 . P
100
75VT342
4411
- 85V
UNFILTEREDB++
RI31 150K
IN SORESFr.
R206 270K
R200 47K
12603 Rb02 3K R604
33KVERT4HOLD 22K IJ
-AW-""* 2
R6I9 68
,70
C6001f,-,017
VERTICAL
016PIC
HORIZ PULSE SHAPERR510 1K10v
I 1, PP N
R5111Kl
021 ,P1.1
VERT OSCS. 02
017 T. P.
AIMHORIZDRIVER
c9 PP P PP
+30v
HORIZONTAL
CON-TRAST
R130 1K
4807 UNFILTERED
39K 023
2.8V
AIVVERT DRIVER
dr&P 2 3V
VERT
LINR40813 4Vr R6I3
k517 1 5K
Po K-------------------
JO 5V
21KPv1i 0+
30V
4203 IK/VW
R202103K
BRIGHT -
NESS (204CRT
MUTING46=_
SPKRJACK
AMPACK
urr
R5Z7 47K 140, PP 0
111.NO"M/10-ALL CRT PINSNAVE SPARE GAPS61.111.T INTO 110C112T
804:
C138
5006f
R127 10K170V
, UNFILTERED B-1+
26-M4853 2
LINGERINGSPOT KILLER
23.1EP4
.7K
R620 390
.7V
-{1
024I
AIC 1
VERT OUT 1
VERT I
LIZE
-C524.001 1503
T600 RP
l'ELB++
75VHORIZ
2 SIZEak1-505 0-07
to, LATER
uC5
I C.c5.3112
- L-503 INDAMPER 22" 0"
1105432(Th01 OM 2013
JELE,Pi.01/2,64
500y DIK-C511. _IMF
.170V T5251 aL.47
DIAG 83D651601771-4.--1C5I0 (.005PIP 9OF 7501
41._C866 I1401,4, UNFILTERED
8++
a
5 r
V2
-3012HV RECT
NV11
1 Sv
L507 BOO 'TRECT
E5OS
A4GC 2+8 tr.-.
II 3° -4:5V 170
B++
1232 COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH. MINNESOTA 55802
1233SYMBOL DESCRIPTION PHILCO-FORD PART NO.
C41 ---240i4 2400/200v B -+ 1 Bog 50 filter 30.2801-33D1 ---dual phase comp 34-8037.102-1N80C 2nd dot 34-8022-6L3 ---Quad snd dot 32-4876-1L4 ---sound IF 32-4745-1215-4.5MHz & STO 32-4688-1417 ---tuner cplg 32.4852-101L1O---horiz stab 32.4754-3L12---47.25MHz trap 32-4652.78113---41.25MHz trap 32.4652-80L17 ---video dot coil 32.4652-79L19-80MHz damp cath 32.4112-63N1 ---retrace suppression 30-8024-9N2---vert integrator 30.6030-12N3---horiz osc 30-6057-1N4 ---phase comp 30-8035-2RV1---varistor 560v @l0ma vert out 33-1373.6F1-5.611 fusistor 33.1386-22AOT---audio output 32-10013-5FC-filter choke Illy 32-10075-1HOT---horiz out 32-10008-8VOT-vert out 32.10012-9VR1---500K size 2M lin 60K horiz hold 33-5595-18VR2---500K vol & on -off sw 33.5619-22VR3---250K bright 33.5619-21VR4-15K contrast 33.5619-20VR5---135K vert hold 33-5619-23
yoke & cable asst/ 76-12942-9tuner -UHF TT -152B 76-13827-2tuner -VHF TT -MRCS 78-13579-10
OSCILLOSCOPE WAVEFORMSThese waveforms were taken with the receiver adiusred for
a approximate output of 2.W p p at the video detector.Voltage readings taken with raster lust filling screen and allcontrols set for normal picture viewing except for photos I, 2
and 1 where tunics. rats al Maxin,sn. The .011.1, a given are.115tosimate peak -to -peak values. The frequencies shown arcthose of the waveforms...not the sweep fate of the oscilloscope.All readings taken with Model 1450 114K OscillosLope.
1`. 571 II/max contr..,
4 4'44 4 4 oi
0
r0
0
01,A`07.P.
kY.',1`11'
ph 86 Volts p p.15.-50 Hz
Am.4,,,Mm..,,
O Ilimax,mast
O
0
O II/,'tmax sontlasl,
0
u,O
olis p p.
O colts) p P.
5.115 P p, 0 '5 Colts P p.15.-50 Ilz 15,-50 Hz
400 Volts p, 50 Volts p p,15,-50 Hz 15.-50 fie
VI4CS6
SOUNDDET.
MUMS
OEMEMIXE1
DEEM
V312FX5AUDIOOUT.
OSUMI
E1132M1EIEZZ1
VS17J213
ERLOSRT. OUT
V74EH7
1ST. I.F.
Mtn Volt,1,37
35V135V
J-. 171--t
.w3. 44. wG-11
1:2411
%NI/
647
M33
L7
3
T 1 f=..---1
C2 H /-( C3
o'r*101%aro
2,,4IRA
an.
'IP
rmal Nem,8 1c-71-1117-70
M2930.
C27
?et 3- 14
.
"a1. 3417.1 LEI IC:,
C735`.-
IW1L0/1
MC)
4294.(A)
*1 H451.5
L4
06 R5lo
4
5
'Telt
C37
(El
Irc,
3
20
-CAMP
21
.fie
M312
M32
2
145M641 -
841
M24 owt, ~M27.11--do
PL5 ilFl
131,
t
4(C1.441.16..4-1K61.1 $43. mi054r..
- -r1 i M40
Dl
(,,c35.1
a 50V
THIEN 1rNI
1011(1 ACC 11/-
Top View-Perma Circuit Panel Components
NODULE "A* 142.7510)
-C40 1C31 113
6 6 1125115
1113
I71211251125 039
Mit ION 39
641
20
5%
64601 151}
4E111
1ST If
to
C 28
1$
VEIT 0 VERT
034If
145 C31 C29 -330 15001- 150020% CIV CIV
1500
61111 642S 16
2
TIN
VRI
C #0612
4010
150V
1.3
1111
4E1721101f
1 1st
645 C34100 1500
WV C32560
)1
'S 10%
r
L
644
V46GH84
SHELIASYNC. SEP
V210dY111
V ID _A MP.
AGC
V613F07
NOR. OS
V1346J7
2N0. 1.F.
Pin veils1.3V135v135V
.3
7a
NODULE '1' INTECTOR/-it---1Ism LI6
I
1
1
J
18
IIII LIT 1:13
1:__1 5
1/52 ,q,1110210 Ill
Tp19
560163-
I450
ELECTRONIC 2fWirr=TECHNICIAN / DEALER AC
COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
RESISTANCE CHART
PHILCO-FORD
TV Chassis 19L21
JUNE 1969
SYM-BOL TUBE FUNCTION
PIN NUMBERS
1 2 3 4 5 6 7 8 9 10 11 12
VI 4CS6 Sound Defector 5.511 56011 FIL. FIL 200K 12K 2.51L
V2 10JY8 Video Amp. 8 Gored AGC 4.5K 25K 1.60A FIL FIL OIL 3.3K 14K 10K
V3 12FX5 Audio Output 8211 Oft FIL FIL Oft 16K 14K
V4 6GH8A Sod. IF EL Sync. Sep. 15K 311 13K FIL FIL 13K 15001 on 1.9M
V5 17JZ8 Vert. osc. FIL 3.5M INF. 14K INF. 1.3M 1.3M 14K Oft 150K Oft FIL
V6 8FQ7 Hai:. Osc. 23K 2.1M tuon FIL FIL 40K 120K 82011 on
V7 4EH7 1st Video IF 2011 600K 2011 FIL FIL 011 14K 26K 0
V8 4EJ7 2nd Video IF 10011. 011 100 FIL FIL on. 14K 14K OA
V9 38EH7 Heti, Out& Damp*. Fll 13K NC cim AM NC NC on 330K NC 18K FIL
Dponds en motor polarity05
44
141/2 MIA
SIT5 564
L
C14
01
CPI
45t SIO
1 71
TRAP OFFI
gm 1116 TINE 631
1.5
66307150
14
I I ACC TI II"647220
C16 I 20% PI
1500GNV
6801
120 VAC
00 n.
E11)/4001V
C2
33
100V
CS15
100 V
03
6806s^t.
220ClIC
62 1. 1112668011
= 20011rotes
R17
6806I
1006 0
15%
652336
624156
121/2 1010
GATED
AGC
023
Tr
14
1/2 60136
SYNC SEP
C43680
6331506
1151
IC18T330
RIO
30v619. 625
.5v 220 221
N`+1458
_ 6191200
Dtil
03
PICT
f1560
CON
C4TD
160 0
12001
CI1680
EC. 656
IN160
100 C4111
"% 12004240 0
1E0 oC418
24011F
T2001
99 V2 04 VI 15 VS 01 VI3807 10118 6GH8A 4056 12105 17128 407 4E17
2 1 5 4 5 3 4 4 3 12 1 4 ..L2.1 5 4
114 135C35 C36 I C31
15001
1500
T1500GIN 6101 WV
PSI
ION
AN 1
L6390
11132
1134
3 311
+1400
TIVA6601
31
Vol IA 150Te
1 041f
121 017 [ 2SLT=1NM COOP
-
/IV
1121
+146,.._1vv.620561
NS
31
Al
12,5
12 626390 , 222020% 2
1/2 10118
V10E0
DV
OUT
1 1066 /
005 004 1
31
150 4821 1
L12 -J
+1450 TL114 026
CRT1210 r - -
Ye 121116444 Ro 1 RIT0101 1261.1141 3605 50.11
3 4 4 I
LVIff Tu1E1 =11-16105
fu- 1
111-1521 P6I151
TUNER
+11
OMER
SIIIOH
CLOSED
ON 041
C2268i0%
25V 2
VI8F01NOR
OSC
C30
T3900
1311406
C23
3903%
100.1
PSI121
C2400391OOY 110
R5
A 112
144 NS
151
COIT.
031NOR
0CI I
NIT
RIZ3901
015C2I
20081
640.1652820 681
01110
2 606
60011010
MN
r
221VS5300
1'11'
3.44 35061 1121
LI" _01 _To_Yt C25
40610%
8101 220
OSC
60 VI4C56
15 DET
7 et
C1
1
200V
1450
N.,ll
3901
149221
01121
VERT
LIN
616411
614561
113
2506111611.
VS
1/2 WEIVEIT
OSC
01311 21
815
2 2120%
?ri 314?
1(
1550fi_ _ J
105
11000
N12
113
1110
C4 1663300 150114 40010
IN9125001
VOL
10
NI
2.3
1124
126
C7
H V.
_ 22
22629%
CRT
12104121001216P41
6391500
+1400
RI A.0 T L51
151
11
IN100115'ITN PtivAlf
L usTromc JACK j
It ACI
901
Ki
R29
C20- 01
1251
153
91 3301
1/2 116E7NOR
CT500- I OUT
(
011151cAlti
+1450
CI5ISO CV
VIS1351
VERT
0612001
CI30334006
+1458
121
631 1148
1001 8201
C33047ROI
022
1 CI9047
y5 RV1
1/217118 "10 MA
6001
VOEuRTT _
56
657271
125
ISO
6381 ON
11
0185001VERT
SIZE
00 404 nulf
140
R54 6504.711
11 II113I
655
2.21
1131
I124
fOCUSI
6362.21
20%
+1401
R593 9
VIO113
NV REG
6604.71
0447-- ITO
5055 R5,3
72' IM 6 81
11.0.1.1
6 35
111 N 5 ill 33N
CATE RIK
15
RFC
NO1
TOIL
H.V (CRT)
MI MI, IHXSUI1
1/2 381E1
CIANATA
1233 COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH MINNESOTA 55802
1234SYLVANIA
TV Chassis A04-3
JUNE 1969
UHFTUNER
IGC
VHFTUNER
S.
ELECTRONIC Trr=7-7TECHNICIAN / DEALER
COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 6 NEW SETS
SYMBOL DESCRIPTION SYLVANIA PART NO.
C500---2 sec elect 41-55012-1C500A---1500/30V 41-55012.1C5008 -2000/30v 41.55012-1R133---VDR 38.55105-2R256 ---7.5K -2w 5%R324---VDR 38-55105-1R400 ---33K 5%R402 ---47K 5%R414 ---15K 1wR431---50 thermistor 38-55106.1
0.0 01022N3693 ret 210693IT )1103 I.6 ,VI 2110 PM 17
lv1,6
I;P:1
T22011 0.
T
00
Ci0404
330
L202---47.25MHz trap 57-55044-1L204 ---IF input 57-55045-11211 ---filter 50-55040-1L214---2200 peak 50-15318-12L302---vert del part of yokeL400---horiz Bea 50-55056-1L402-horiz del part of yoke1404 ---width 50-55039.1T100 ---ratio det 57-55057.1T102 ---audio output 56.55035-1T200 ---1st video IF 50-55043-1T202 ---2nd video IF 50-55043-1
7at11_aL
-1 i'l;OrROt
I 't fafC110
i C112330
mo I
T"°11111-U
!M.; IL Off
MHO350 A
0104is-esose-r(C51349)
152 AUDIO AMP
c 120 ;Z../
0120413
M.
T206 ---sound take off 57-55058-1T300---vert output 56-55037-1T400 ---buffer 56-55038-11402 ---high volt 50-55033-1T500 ---power" 55-55034-1R118 -10K vol/on/off 37-55050-1R207 ---10K AGC track 37-55051-2R232 ---1K AGC ..........................................37-11632-12R243 ---15K video set-up 37-55051.3R262 ---25K contr 37.55053-3R270 ---220K bright 37.55053-2R314---50 vert lin part of R232R318 ---1.5K vert height part of R232R328 ---10K vert hold 37-55053-1R420 ---10K horiz hold 37-55007.1R421---250 horiz hold trimmer 37-55051.1CB502---cir brkr 29-17620-1SC302---diode vert blanking 13-55031-1
yoke def 51-55055.2tuner VHF 54-17907.3
00413-55064-1.
(CSI352).010 OUTPUT
31003110
11122San
Cat
1/7111111
MMS
IV/Vi
00 SO
;e2
610.1 6129
330
110t/ 29101/
I 0200
I1 v3.16428090,
2 /V
0204253688
.0 01030 II
2.691,N !IN
111
11360Y.t1V/
200
r0204
VS"2113563
etSv6161141,
SRO ,1010 12
tram lifs16 ..10 5V
IN, OWI
21410
1.6611
8201
IIL_ c2o,04 _L
0202530 A
82045 50 n
6210.0022
ea
R214220 11
T--.5110
V530
.220/
INC TIVOINP
10203R.2200
23
340
6212 2041 0051'3 (111V
0
667166V1
0.13-55066-2'
ICGc uPSI349)
1200
1.11,
14224L410
coin
ELM
42502211
s000 L211 Lilt
l
-r111
02
C125
T20v
22v
01
s
O-2.113 -5062 -I.
IV ,j -.II (cs1347)
v0E0 MOPC2311.I.0015 ...-,
12064.3410
1 02,0 LI 2113694
oxoll/d.04000
234330 A
311041004
32 ONNDOVI
or,NV 6
02002N3693OGG 3f TER
990NOM
1.10.5VIf /65V1
!:St" A
30002203
!ivy.,401,12
C303-17.
ilvpvvERT
8304
3301 3 302.011 411
T5303
111111._.
64011
it v
Or* 50212 000 TIM 01010200 7101202100300.03020400 03040405.02.0404
SOT TOM 01242 Of 25.1141570123
ON CASCO3
Stan0154092
0400333
c.o.00,2
3C02i3401
4 _
5404223
la0v,
43021:30 2113638
5 vE 4, os,
;SO
7:32.5116
112345011
3232 3240334 32011
C231 C234
1.4650.0
VERT
22550022
III0V016106
10461//
2.60 .fl
21
gs.-z, 116:
IC5060514500
1.113
sY
342
5128.30
113101.53V.REMLIT
C402 _F.'
:Iv 13
5% SY
v311MOMS
OK.
53101 23
351.MORI'
0
2.3N:3:2
0400 69 3
5052N5,690.3,
own oscC4111
AM! 54"10'1:5W
W"
""54cow3%
05.61 2 2347
3 3_LC4.6
7,1
103
din .5450
5424r 110LNt
00404
04111
114.5
_NI
- C400 02 6410T-
4420103off roC4.0
524
4 0304
* 515,041 13-55009-1.VERT201
1:40V
C422/.6.41, 056/MANI
343
51.
0434330A2r
SOO
V11.VERT
R20/535triSY
31
7.1"
1:0V
117
351110.06.a 4.0
3.3 MIR3 211
ANSINNESS CONINOL se, PUS033V WAD/NC AV VIE POINTFON ALL VOLV.W.
326* 32643404 ISO
625022
Lazo I-120UM
3261
525$
11.302131.ff
140010211 CONTROL
1 5V14, 0 4014,1 0, 13-55009-25
110511 00151.12
COOS
54341404Ow
111-6142
(.5
0022
IL:00KIRI2fREO
U:117
111014
153
SC40312v
.21250rt
H01.0TR.
423
R.19 3220
iN
04405111
'2031
L402200 014
J
30
Tr.
.4,7
040,
c.tr T1:32T
Atoll.2A
02202200
U55.0042
35V.VERY
v 200310DMEI4
tt
1310
6
1500
TRANSISTOR CROSS REFERENCE LIST
504214AT1c "IVY. 501.0011 E.C00140 PART NO ECG NO. TOPE MO.
MOO 5-50041'1 E6123 2330330102
.31043,5001-13-550401
(COO) 233093
0100 3-550641
0200 3150019 203100 2335290202
02043-050502.5065, CC.' 25514110
02000004
)'5000'3-510411-1
26410112C612S
211331532115555
02040212
5-500601550002.1
2.23 253034
40500 51001.010240.4
3'55001.500. 268104 2/04311
0400 .000- I C64123 21)09304020404
3-5504213.0401
2042326023
203493255557
50404 5-500094
SCHEMATIC DIAGRAM
VHF TUNER
0
0
*v,
cn
mAco
C Crf,
2C
N>z3
cm
g2
o08 0
0 ki) 40
=.
1234 COPYRIGHT 1969 BY ELECTRONIC TECHNICIAN/DEALER HARBRACE BUILDING. DULUTH MINNESOTA 55802
TRANSISTOR LAYOUT DIAGRAM
OVERHAUL
GUARANTEED
tot 1 Year
OVERHAUL $9.75 REPLACEMENT TUNERS ... 610.45Nine -seventy-five buys you a complete tuner overhaul-in-cluding parts (except tubes or transistors)-and absolutelyno hidden charges. All makes, color or black and white.UV combos only $15.
Guaranteed means a full 12 -month warranty against defec-tive workmanship and parts failure due to normal usage.That's 9 months to a year better than others. And it'sbacked up by the only tuner repair service authorized andsupervised by the world's largest tuner manufacturer-Sarkes Tarzian, Inc.
Four conveniently located service centers assure speedyin -and -out service. All tuners thoroughly cleaned, insideand out ... needed repairs made ... all channels aligned tofactory specs, then rushed back to you. They look-andperform-like new.
Prefer a universal replacement? Sarkes Tarzian willgive you a universal replacement for only $10.45 Thisprice is the same for all models. The tuner is a newtuner designed end built specifically by Sarkes Tarzianfor this purpose. It has memory fine tuning-UHFplug-in for 82 channel sets-universal mounting-hi-gain-lo-noise.
ORDER TUNERS BY PART NUMBER,AS FOLLOWS:
Intermediate AF Amp Ose. MixerPart .7. Frequency Tube Tube Heater
MFT-1 41.25 mc Sound45.75 mc Video
MFT-2 41.25 mc Sound45.75 mc Video
MFT-3 41.25 me Sound45.75 m: Video
6GK5
3GK5
2GK5
6118 Parallel 6.3V
51.18 Series 450 MA
5CG8 Series 600 MA
Prefer a customized replacement tuner? The price willbe $18.25. Send us the original tuner for comparisonpurposes, also TV make, chassis and model numbers.
SEND ORDERS FOR UNIVERSAL AND CUSTOMIZED REPLACEMENT TUNERS TO OUR OFFICE IN INDIANAPOLIS.
TSC
TUNER SERVICE CORPORATION FACTORY -SUPERVISED TUNER SERIICF
MIDWEST
EASTSOUTH-EASTWEST
817 N. PENNSYLVANIA ST., Indianapolis, Indiana(Home Office)
547-49 TONNELE AVE., Jersey City, New Jersey938 GORDON ST., S. W., Atlanta, GeorgiaSARKES TARZIAN, Inc. TUNER SERVICE DIVISION10654 MAGNOLIA BLVD., North Hollywood, California
TEL: 317-632-3493
TEL: 201-792-3730TEL: 404-758-2232
WATCH FOR NEW CENTERS UNDER DEVELOPMENT
TEL: 213-769-2720
JUNE 1969
... for more details circle 138 cn postcard
19
$114,000,000WILL BUY 1,000,000 TRIPLETT 310 VOM's
BUT YOU ONLY NEED ONE...Ai $44°' THAT'S A BARGAIN
00
MODEL 310World's Largest SellingVolt -Ohm- Milliammeter
(SHOWN ACTUAL SIZE)
HAND SIZE V -O -M WITH PROVISION FOR ATTACH-
ING AC CLAMP -ON AMMETER.
20,000 OHMS PER VOLT DC SENSITIVITY; 5,000 AC.
ONE SELECTOR SWITCH MINIMIZES CHANCE OF
INCORRECT SETTINGS AND BURNOUTS.
MODEL 310-CVolt -Ohm- Milliammeter
310-C PLUS FEATURES
0 Hand size V -O -M with provision forattaching AC Clamp -on Ammeter.
15,000 OHMS per volt AC sensitivity;(20,000 DC same as 310).
Single fully enclosed Lever RangeSwitch, plus DC Polarity Reversing.
MODELS 100 AND 100-CComprehensive test sets. Model 100 includes:Model 310 V -0-M, Model 10 Clamp -onAmmeter Adapter; Model 101 Line Separator;
Model 379 Leather Case;Model 311 leads. ($83.20Value Separate Unit PurchasePrice.)MODEL 100 - U.S.A. UserNet $78.00MODEL 100-C - Same asabove, but with Model 310-C,Net $88.00
SELF -SHIELDED Bar -Ring instrument; permits checking in strong magnetic fields. FITTING INTERCHANGEABLE test prod tipinto top of tester makes it the common probe, thereby freeing one hand. UNBREAKABLE plastic meter window. BANANA -TYPEJACKS-positive connection and long life.
Model 310-$44.00 Model 310-C-$56.00 Model 369 Leather Case-S4.20All Prices are Suggested U.S.A. User Net, Subject to Change
THE WORLD'S MOST COMPLETE LINE OF V -0 -M's AVAILABLE FROM YOUR TRIPLETT DISTRIBUTOR'S STOCK
DON'T FORGET TO ASK 'EM "WHAT ELSE NEEDS FIXING?"
TRIPLETT ELECTRICAL INSTRUMENT COMPANY, BLUFFTON, OHIO 45817... for more details circle 137 on postcard
20 ELECTRONIC TECHNICIAN/DEALER
HUGH "SCOTTY"WALLACE
Publisher
PAUL DORWEILEREditor
JOSEPH ZAUHARTechnical Editor
MORTON WARNOWField Editor
DONNA BUTLERProduction Editor
BOB ANDRESENArt Editor
LILLIE PEARSONCirculation Manager
JOHN KESSLERManager, Reader Services
JUDI I.eMAYAdvertising Production
OFFICES
71 Vanderbilt Ave.New York, N.Y. 10017Phone: 1212) 686-2200
Telex: 01-26286
43 East Ohio St.Chicago, III. 60611
Phone: (312) 467-0670Telex : 02-53549
1901 West 8th StreetLos Angeles. Calif. 90057
12131 483-8530
Harbrace BuildingDuluth. Minn. 55802
Phone: (218) 727-8511Telex: 02-94417
MARKETING REPRESENTATIVES
HUGH "SCOTTY" WALLACEChicago: 4312) 467-0670
ALFRED A. MENEGUSNew York: (212) 686-2200
DONALD D. HOUSTONLos Angeles: (213) 483-8530
ROBERT UPTONTokyo. Japan
I.P.O., Box 5056
HARBRACE PUBLICATIONS, INC.
JAMES MILHOLLAND, JR.President
DEAN MYHRANExecutive Vice President
RICHARD MOELLERTreasurer
LARS FLADMARKSenior Vice President
HARRY RAMAI.EYVice President
BEN MARSHVice President
JAMES GHERNAArt Director
WILLIAM SWAINDirector of Marketing Services
DOUG HEDINAd Production Manager
ELECTRONICTECHNICIAN / DEALERWORLDS LARGEST ELECTRONIC TRADE CIRCULATION
JUNE 1969 VOL. 89 NO. 6
35 TEKLAB REPORTThis month's report discusses Setchell Carlson's all new hybrid color TV re-ceiver U809 and U810 chassis, complete with circuit description and sche-matics
40 TV TUNER SERVICINGMany technicians are gun-shy of that little box called the tuner-and rightlyso. It takes a certain amount of know-how and equipment to properly serviceone. This article tells you how to do basic cleaning tasks and what to look forin deciding whether or not a tuner is at fault
44 POST MARKER COLOR TV SWEEP ALIGNMENTTechnicians will find part one of this article of special interest as it explainsthe application of the post marker sweep instrument operating procedures aswell as waveform examples indicating both normal and poor alignment invarious circuits
48 SOLID STATE HORIZONTAL DEFLECTION SYSTEMSThe latest deflection circuit design using all solid state devices is explainedin this timely feature which describes 'he actual circuit operation in an RCA-CTC40 chassis
52 SERVICE -DEALER PROMOTES TECHNICIAN TRAININGOne way to overcome the technician shortage is to help start a program fort'aining them in your own area as explained by an enterprising group of Texasservice -dealers in this month's Dealer Fax profile
55 TESTLAB REPORTIn this month's Testlab report our Electronic Technician/Dealer lab techni-cians review the new Darcy DM330 digital multimeter and the B&K all solidstate 1077 television analyst
22 EDITOR'S MEMO 58 DEALER SHOWCASE24 NEW AND NOTEWORTHY 62 COLORFAX26 LETTERS TO THE EDITOR 68 NEW PRODUCTS30 BOOK REVIEWS 70 NEWS OF THE INDUSTRY32 TECHNICAL DIGEST 82 AD INDEX
COVERThe lovely Miss Arlington Texas promotes goodwill for her home town and re-flects the goodwill of the local service -dealers such as West Part TV who showthat no matter where the service call, they are ready.
TEKFAX 16 PAGES OF THE LATEST SCHEMATICS GROUP 202AIRLINE: TV Models GHJ-14829A, GHJ-14829B, GHJ-14859BDUMONT: Color TV Chassis 120926, 28MOTOROLA: TV Chassis TS613 SeriesOLYMPIC: Color TV Chassis CTC31PHILCO-FORD: TV Chassis 19L21SYLVANIA: TV Chassis A04-3
HARBRACE PUBLICATIONS, INC.I I A subsidiary of Harcourt, Brace & World. Inc.
ELECTRONIC TECHNICIAN/DEALER is published monthly by Electronic Technician, Inc., Har-brace Building, Duluth, Minnesota 55802, a subsidiary of Harcourt, Brace & World, Inc.Subscription rates: One year $5, two years $8, three years $10, in the United States andCanada. Other countries: One year $9, two years $14, three years $18. Single copies 75Cin the United States and Canada; all other countries: $2.00. Second class postage paid atDansville, New York, and at additional mailing offices. Copyright 1969 by Harbrace Publi-cations, Inc.
POSTMASTER: Send Form 3579 to ELECTRONIC TECHNICIAN/DEALER, Harbrace Building,Duluth, Minnesota 55802.
JUNE 1969 21
Imaginea doctorwithout astethoscope
Imaginean engineerwithout aslide rule
Imaginea professionalservice technicianwithout a SencoreMighty Mite V.
STANDARD OFA PROFESSION!The Mighty Mite has become the standard of the industry with over50,000 used daily by competent professional servicemen from coastto coast. The Mighty Mite checks them all; tubes large and small . . .
and it checks them critically too. 100 megohm grid leakage sensitivity,individual tube element shorts test and cathode emission test at fullrated current make the Mighty Mite really tough. It's tough on tubetests, tough in appearance with vinyl case and cover, and mightytough on competition. But, it's not tough on your pocketbook at only
See your Sencore distributor today.He has the TC142 Mighty Mite in stock. $84.50
ENCORENO I MANUFACTURER OF ELECTRONIC MAINTENANCE EQUIPMENT
42E SOUTH WESTGATE DRIVE. ADDISON. ILLINOIS 60101
. . . for more details circle 130 on postcard22 ELECTRONIC TECHNICIAN/DEALER
EDITOR'S MEMO
The Night People
1 he seemingly unanswered cries ofshop owners for more technicians, andthe technician's laments about money,are not exactly parallel problems. Infact, being "underpaid" doesn't ap-pear to bother some technicians.
The procedure often referred to as"moonlighting" has a new twist. A ser-vice shop sends a technician on ahouse call. It turns out to be an ex-pensive TV repair problem. The setowner, feeling a twinge in the pocket-book, wishes out loud that there wasa less expensive way to enjoy his fa-vorite color program.
The technician mentions that hesometimes repairs sets at home in hisspare time. Since his overhead is low,the repair cost will be greatly reduced.To many a man with a sick color set,a family intent on watching TV and amoth -filled pocketbook, it's a deal. Af-ter all, the technician must be reliable;he works for a reputable service shop.If it means a smaller repair cost and(often) a faster job, why not?
The customer informs the shopowner that the repair is too costly andhe will wait awhile. The shop ownermay realize what's happening, butwhat can he do about it? Techniciansclaim that they need night work tosubsidize their low salary, and shopowners take a soft attitude. They can'tafford to lose the technician-someeven feel lucky if the technician useshis own rather than the shop facilities.The situation is, of course, a productof increased service work and fewermen to do the job. The money is mere-ly the clincher.
In today's TV business, a servicetechnician might earn as much as$100 a week in home repairs-most ofit picked up through shop contacts. Asone technician bluntly put it, "If I getfired, I'll stay home and earn as muchas I do at the shop."
How towriteagreatad.
Your services aremore important
than your name.
Tell people aboutyour special
services... repairs...rentals.
List productsyou carry.
Tell people what youwill do for them. Howyou're different. Thisis most important.
Emergency ServiceDay or Night
BARRY'S HEATING & PLUMBING
Since 1921
COMMERCIAL,INSTITUTIONAL, RESIDENTIAL,
INSTALLATION & REPAIRS
Complete line of: * Master Lic.#103241
* References* Estimates* Delayed
Payment Plans ,.
* AmpleParking
Kitchens Laundries Sewage Systems Water Pumps Heating Systems Pipes and Drains
1--- phone ---i1555-23681
77 Locust Lane. (Between Main andCentral, one mile from RR. Station).
1
Give telephone number andaddress, of course; and if
you're hard to locate, directionsand perhaps a map.
Be under theproper headings sopeople can findyou fast. Maybeyou should be underboth "Heating"and "Plumbing:'
Use your logotypeto gain recognition.Give facts aboutyour qualifications,reliability, etc.
Tell how easy itis to deal withyou... credit,parking, hours,delivery.
There...you've written a great ad. Now place itwhere people will be looking for you...in the Yellow Pages.
JUNE 1969
. . . for more details circle 101 as postcard
23
NEW AND NOTEWORTHY
4ts ALIVE .
JERROLDANTENNAS
AUTHORIZED RECEPTION SPEIIALIST
FOR MOREDEALER SHOWCASESEE PAGE 58
FOR MORENEW PRODUCTSSEE PAGE 68
24
NEW PRODUCTSCircuit Breaker/Fuse 700Adaptable to chemical or amp fuse socket
Introduced are circuit breakers with amp fuse pins. In TV repair involvinga blown chemical or amp fuse, several fuses can be blown before the troubleis found. This can be expensive and if a jumper is used, it can cause extensivedamage. The FA fuse, which fits in the same socket as the chemical oramp fuse, can eliminate this problem because it can be reset as often asneeded, or until the cause of breakdown is found. The FA fuse can beleft in the set after the repair is made. Model numbers FA350-1, FA1000-Iand FA2000-1 have the same carry and break currents as the chemicalfuses with the same model number. Workman.
DEALER SHOWCASEIndoor Clock -Sign 701Internal illumination and built-in clock give additional life and utilityAn animated indoor clock -sign is introduced to help dealers identify theirhome products. Dealer identification is given added impact by a "moving"home products logo and a stylized home and antenna. Bands of red, blue,green and white (suggesting color TV reception) flow from the antennainto the home. Internal fluorescent illumination and a built-in electric clockgive the sign additional "life" and utility. Dealers add their individual messagesto the signs using acetate letter sets inserted in a track on the panel. Thesign, 15 x 37 in. in size, can be set up, suspended or wall -mounted. Jerrold.
NEW PRODUCTSFM Window Antenna 702Solves reception problems where a rooftop antenna is prohibited
Announced is a window -mounted FM turnstile antenna, a solution to receptionproblems in apartment buildings and other locations where a rooftop antennacannot be installed. The all -direction antenna is designed for receptionover the full FM band from 88 to 108 MHz without necessity for rotation.The two folded dipoles are matched with a quarter wave phasing stubfor optimum gain and an approximately circular pick-up pattern. The all-aluminum antenna has a gold corrosion -proof finish and carries a listprice of $16.95. The antenna can be mounted either horizontally or verticallyto fit any type of window with a span up to 42in. For wider or higherwindows, two extension mount bars are available: the Model FCW-18, whichextends the mounting an additional 18in. and carries a list price of $2.97,and the Model FCW-30 which extends the mounting an additional 30in.and has a list price of $3.25. Finney.
_ -
DEALER SHOWCASEComponent Merchandiser 703Self -selling display holds 53 items
A new point -of -purchase displaymerchandiser offers a complete lineof blister -packaged connectorcomponents. The new display contains53 different items-from microphoneconnectors to lightning arrestors-attracting the customer's attention aswell as telling the complete productstory. Colorful, informative and tothe point, it provides maximumcomponent visibility and clean over-allpackage appearance. Amphenol.
ELECTRONIC TECHNICIAN/DEALER
There is a difference.When our engineers designed ourLPV Log Periodic antennas, theyadded something that made ourantennas really different:
1 Patented capacitor -coupled logperiodic -V dipoles that operate onboth the fundamental and har-monic modes for higher gain andfront -to -back ratios than otherVHF antennas with more elements.
2. Log Periodic trapezoid driversfor amazingly high (but uniform)frequency response on all UHFchannels.
3. Radar -type disc -on -rod direc-tor system that vastly increasessignal capture across entire UHFband. Rejects multi -path re-flections.
Is it any wonder JFD Color Laserand LPV Log Periodic TV anten-nas outperform antennas larger insize and number of elements?
Is it any wonder why profes-sional installers who count onantenna gain (not the elementnumbers game) prefer JFD - thescientifically designed antennawith the college education?
JIFIZPLICENSED LNDEA ONE 011 MON OF U S PATENTS 1951 Oil. 1915 529.1 011 TED 1 101200. 3.1so 376. 1 210.76T.Itt IS 740 AND A00111044PATENTS ?MONK IN USA AND CANADA PRODUCED IT ND (LEGTIONICS CO UNDEN LICENSE MOIL THE UNPKTISITY DfILLINOIS FOUNDATION.
LICENSED UNDER ONE ON NONE Of U S PATENTS 1951117 AND 1015.121AND ADO I IONA PATENTS FINDING
Call your JFD distributor andsee the difference in spectacularcolor and black -and -white.
And while you're at it, ask himabout our versatile new solid stateProgram Center amplifier -distri-bution systems.
N
JFD ELECTRONICS CORP.15th Avenue at 62nd Street, Brooklyn, N. Y. 11219
JFD International, 64-14 Woodside Ave , Woodside, N. Y. 11377 JFD Canada, Ltd., Tororto, Ontario, CanadaJFD de Venezuela, S.A., Avenida Los Haticos 125-97, Maracaibo, Venezuela
. .. for more details circle 119 on postcard
JUNE 1969 25
Make the wiggly test.AdMirnimb
111111111111111111111
1111111111111111111111
1111111111111111111
On the left, a pattern' produced by an ordinary color bar generator.On the right, the equivalent pattern' produced by Leader'sLCG-388. Perfectly stable, the instant you turn the power on.
Flip the switch, and you can select from 15 patterns. Includingthe single dot, single cross, single horizontal and single vertical.
The magic is in Leader's binary counters and gates. Nobodyelse has them, and what a difference they make.
$149.00, and you can make the wiggly test at yourdistributor's. For the one nearest you, just drop a line or call.
'As photographed.
Seeing is believing.-r
aimml 00 simmisi Nsa f0 a
LEADER INSTRUMENTS CORP.24-20 Jackson Avenue, Long Island City, N.Y. 11101/(212) 729-7411
. for more details circle 120 on postcard
NewCoil
CatalogCatalog 170 gives specifications, prices andinstallation diagrams for the industry's mostcomplete line uf RF and IF coils.
Exact replacements are crossreferenced for all known colorand black and white TV sets,home radios and car radios.
NewReplacement
Directory
New J.W. MILLER COMPANYPlant
Address
19070 REYES AVENUE P.O. BOX 5825COMPTON, CALIFORNIA 90224
See your local distributor for your copy of Catalog 170
LETTERS
TO THE EDITOR
Thanks
I am writing in regard to a letterfrom Arthur Clendenon of Tennesseewhich appeared in the October 1968issue of ELECTRONIC TECHNICIAN/DEALER. His letter said he would giveback copies of ELECTRONIC TECHNI-CIAN/ DEALER to anyone who neededthem. I went to Mr. Clendenon to getthe magazines and told him I wouldwrite and let you know so you couldthank the many readers who wrote.him. I read and enjoy every issue.
WILLIAM R. ROSEKingsport, Tenn.
Multiple Ghosts
I am having a problem in my areawith multiple ghosts. I am located inthe flat lands of Louisiana right in themiddle of two grain elevators. Thesebuildings are approximately 300 ft.high and .4 mile apart. I have triedghost killers, high and low gain an-tennas of every shape and form to noavail. I would appreciate any helpfrom your readers or antenna manu-facturers. I have approximately 150customers with the same situation andif I could solve the problem, I couldsell 150 antennas. I have been a faith-ful reader Of ELECTRONIC TECHNI-CIAN/DEALER for years and enjoy itvery much. Keep up the good work.
SALVADOR A. PORTERA, JR.Jr.'s Sales & Service102 Lorraine Ave.Destrehan, La. 70047
Hot Chassis
Without going into the details of mynear tragedy, I found out that a pieceof equipment with a transformer pow-er supply had a "hot" chassis. I wasworking on one of the better, higher -priced CB transceivers, but it couldhave been any brand. The unit wasblowing fuses and yet B+, filamentsand the 110vac circuits tested normal.The chassis was hot through the trans-former laminations which provided acontact between the primary and sec-ondary. The oxide and shellac on thelaminations isolated the core from thechassis and caused the unit to act likean autotransformer. When I attemptedto attach the antenna coaxial connec-tor, I got the full jolt-certainly morethan 11 Ovac!
M. J. CAPRIOLI
. . . for more details circle 123 on postcard26
Phoenix, Ariz.
ELECTRONIC TECHNICIAN/DEALER
ARC ENEMYSPRAGUE TYPE 302C
SPARK GAPS keeptransient voltage surges(caused by momentaryarcing or shorting) fromdamaging TV picture
tubes. They're in stock
at your Spraguedistributor now.
P.S. Don't forget to ask 'em,
"What else needs fixing?"
6,8143
SPRAGUETHE MARK OF RELIABILITY
'Sprague' and a are mastered trademarks of the Sprague Electric Co
. . . for more details circle 133 on postcard
JUNE 196927
-mar
117.
COMPLETE SERVICE
ON ALL MAKESOF TV TUNERS
Day W
I.-,
(WE SHIP C.O.D.)
YOU PAY SNIPPING
$9.95Black &White
or Color
'116 VHF or
V Combo's $16.rice includes all lapt Tubes, Diodes 8 Transistors.
ombo tuner needs only one unit rpaired, disassemble and ship ondefective unit. Otherwise there wibe a charge for a combo tuner.
tohveen
mountingsending
ti:rneecr:etfso r
knobs,eopbasi
tor dials, remote fine tuningngements and remote control dri
nits.
EFFECTIVE AUGUST 1. 1969II tuners must have remote contrnits and/or mounting brackets r
oved before tuner can be cleannd repaired. If these accessories aft on tuner, there will be a $2.
charge for disassembly and reassely
do
ANL
-41se
I tuners are service yAINED TECHNICIANS with yea
f experience in this specialized feelII tuners are ALIGNED TO MAN
ACTURER'S SPECIFICATION on crI controlled equipment andecked on monitor before shippi
assure that tuner is operati
I
GEM CITY TUNERREPAIR SERVICE
Box 6D Dabel Station
2631 Mardon Drive
Dayton, Ohio 45420
LETTERS
TO THE EDITOR
Wants Back Issues
I am interested in obtaining back is-sues of ELECTRONIC TECHNICIAN/DEALER starting from the first issue upto February 1963. No doubt one ofyour subscribers has these copies. Ifso, I would appreciate hearing fromany reader who is willing to part withhis back copies if he would write andadvise me of the cost.
ANTONIO HERNANDEZ Lc/o La Villa de ParisNogales, Ariz. 85621
Readers' Aid
I need a schematic and instructionbook for a Triplett Model 3434 TV -FM marker signal generator. I havewritten the manufacturer and was toldthe information is not available. I willgladly defray the cost if any ELEC-TRONIC TECHNICIAN/DEALER readercan supply me with the original orcopies.
AVON BAUMANBauman & Sons TV Service3255 Mangum Lane S.W.Atlanta, Ga. 30311
Schematics Not Available
Thank you for your help, but thereply from Candle American, Inc.,was negative. I would appreciate helpfrom your readers. My problem ispoor sync causing pulling and rolling.I would like to know if any modifica-tions were made. The set is a CandleModel MT -510.
SSGT EDWARD J. CORSAF17360777Box 57557F15FPO 09571, N.Y.
Editor's NoteCandle America, Inc., indicated in
its reply to SSGT Cors that schematicsare no longer available for ModelsMT -510 and MT -510A Candle andValiant brands of micro TV. The sup-ply was exhausted a year ago andsince the firm discontinued TV manu-facturing over five years ago, it willnot have diagrams reprinted. However,Candle indicates that if the TV set hasnot been tampered with, one of thecompany's service technicians will re-pair it. Further information on thiscan be obtained by writing T. Kikuchi,Candle Corp. of America, 1457 Ven-ice Blvd., Los Angeles, Calif. 90006. . . Ed.
Who needs a tunerwash? Save your
money and use
QUIETROLEThe product that cleans while it
lubricates. Zero effect on capacity
and resistance. Harmless to plas-
tics and metals. Keeps color and
black and white on the beam.Non-flammable.
manufactured by
QUIETROLE co.Spartanburg, South Carolina
for mare details circle 126 on postcard
WAVE FORM ANALYSIS& PEAK FM MODULATION
all for LESS MONEY!The Lampkin 205A FM Modulation Meteraccurately indicates PEAK modulation onmobile transmitters. To shoot troublevisually, use your own general-purposeoscilloscope at the 205A rear lack out-put. This makes a low-cost, highly effec-tive test combo - and a well-roundedshop - all for less money.Lampkin pioneered the PEAK voltmeterfor FM modulation indication.
Like to see the complete specs? Mailcoupon today!
Use this coupon for FREE booklet "HowTo Make Money in Mobile -Radio Main-tenance" and information on Lampkinmeters.
NameAddress
City State Zip
LAMPKIN LABORATORIES, INC.Div. II , Bradenton, Fla. 33505
... for more details circle 117 on postcard
28ELECTRONIC TECHNICIAN/OEALER
The prize you getdepends on how many tubes you buy.
Every time you buy 20 Sylvania receiving tubesfrom your distributor, he gives you a certificatecalled a "Bright Buck," which works like a tradingstamp. When you've collected enough Bright Bucks,you turn them in for prizes.
You can choose any prize, or any number ofprizes from the catalog we send you. As long asyou've got enough Bright Bucks. Naturally, the
more Bright Bucks you have, the more (or the big-ger) prizes you get.
It's a good deal because you can't lose, and thereare no chances to take. So when you buy tubes,just make sure they're Sylvania.
It's not exactly getting something for nothing.But it's close.
SYLVANIAGENERAL TELEPHONE & LECTRONICS
JUNE 1969
. . for more details circle 134 on postcard
29
You're making money in electronics now.
RCA Offers 4 Ways to Make More.
Study at home...set your own pace.
RCA Institutes has an easy approach
to bring you bigger earnings.
COLOR TV:During this courseyou'll perform over50 experiments-and receive all partsand instructions tobuild your owncolor TV.
The cost of the Color TV Kit15 included in the tuition-in both the
beginner's program and the advanced coursein color TV servicing. (Picture tube optional)Course is based on the latest receiver circuitryand equipment.
SOLID STATE
TECHNOLOGYNew courses includethe latest findings andtechniques in this field.Information you musthave if you are to service the multitude of solidstate instruments and devices used in TV, Digital,and Communications equipment.
FCC LICENSE TRAINING:Choose the course for the FCC License you want:third, second or first phone. If you need basictraining first, apply for the complete LicenseTraining Program. Get your License-or yourmoney back.
CAN TRAINING:You'll receive two comprehensive lessons, coveringthe practical phases of CATV systems in either theTelevision Servicing or Communications courses.Licensed by New York State Education Department. Approvedfor Veterans. Accredited Member National Home Study Council.
RCAMAIL THE COUPON NOW FOR COMPLETE INFORMATION.
r -1
RCA INSTITUTES, Inc., Dept. ET -69320 West 31st Street, N.Y., N.Y. 10001
Please rush me FREE illustrated catalog. I understandthat I am under no obligation, and that no salesmanwill call.
Name Age(please print)
Address
City
State ZIPL -J
BOOK REVIEWS
TRANSISTOR -TV SERVICING GUIDE by Robert G.Middleton. Published by Howard W. Evans & Co., Inc.,128 pages, 81/2x11 in. solthound. $3.95.
This book is a revised edition of the first printing. It haseleven chapters which cover circuit troubles in every stageof a TV set including the tuner, AGC, picture tube and lowvoltage power supply. The first chapter gives a few pointerson general troubleshooting and information on typical tran-sistorized circuits. This information will he especially usefulto technicians who are not well acquainted with servicingtransistor circuits. The hook is profusely illustrated withsupporting diagrams, waveforms, test instrument connec-tions and video patterns. In most of the chapters, a generalcircuit discussion leads into a numbered outline of symp-toms followed by an explanation of probable causes andcures. The hook is a practical reference source for anytechnician involved in transistorized TV servicing.
RCA POWER CIRCUITS MANUAL, SP -51. Publishedby RCA Electronic Components, Harrison, N.J., 81/4 x51/4, 448 pages, $2.00.
This manual provides a valuable source of informationon characteristics and applications of some of the latestdevices with a brief theory of operation.
The manual is divided into ten main chapters explain-ing semiconductor materials, theory of silicon rectifier andthyristors (including SCK's, triacs, diacs), silicon powertransistors, rectifier circuits, power conversion, regulation,thyristor ac controls and power amplifiers.
MOST SENSITIVE FET Volt -Ohm METER11 Ranges.1 ohm
10 megohm input1 micro amp
.001 volts AC.01 volts DC
Full LINE of TEST EQUIPMENT 830 -Transistor Tester 840 -Field Strength Meter 857 -CRT Tester/ Rejuvenator
865 -Color Bar Generator 880 -Stereo Test System 870-FET Volt -Ohm Meter
133 N. Jefferson, Chicago 60606 312-346-2841. . . for more details circle 128 on postcard . . . for more details circle 111 on postcard
30 ELECTRONIC TECHNICIAN/DEALER
HOME ENTERTAINMENTDISTRIBUTION WIRINGSYSTEM DESIGNED FOR
EASY INSTALLATION
HWK-75 75 ohmHWK-300 300 ohm
PACKAGED IN ASELF -SELLINGDISPLAY.
For Color TV Black & FM/FM- UHF/VHF White TV Stereo
Get in on the MATV boomin multiple set homes.
A new business meansmore profits.
.7",.77T.t THE FINNEYFfivcoi COMPANY
34 WEST INTERSTATE STREETDEPT. 110-6
BEDFORD, OHIO 44146
Everything needed to wire ahome for multiple set reception.
Your service department caneasily install this system.
Please send free brochure 20-520 onFINCO HOME TV DISTRIBUTION KIT.
Name
Address
City State Zip
JUNE 1969
. for more details circle 116 on postcard
31
TECHNICAL DIGEST
MAGNAVOXRadio Model 1110/C10-Installing Heat Sinks on Output Transistors
The output transistor in the RIO and CIO radios may failbecause of excessive heat. It is recommended that a heatsink, part No. 730651-5, be installed on all 2SB178 and
2BS324 outputtransistors in these
730651-5 units. The heat sinkmust be reformed,as indicated in theillustration, bybending one of theflanges 90deg sothat it will not in -
Bend one Flange 90 degrees terfere with thecabinet or outputtransformer.
Remember to apply silicone grease between transistorsand heat sinks.
WESTINGHOUSE
Radio Model 23S18B-'Squelch Circuit' Description
On this three -band radio, squelch is used for VHF only.The squelch control at the back of the radio is used toeliminate noise and to allow reception when a station trans-mits. Many times only one half of a conversation can be
AUDIO FM.
AM
LCTECT011
4/3_%440. IDA
cHAUDIO
012 0131.-- ISO
SW,* yrs
014.15FAIT PDT
.Z.A1P---Alt .0*
-11=*111t X,., Am,
.44016
1 ,-' 250-14 - - t -
r --
NOM
IOW
lAUDIO DOOM
Pr DETICTOF
IDA
TOMS(AFC,
NOISE AMPLIFIERAND RECTIFIER
heard because of the location and the power of the stationswhich are communicating with each other. The squelchcircuit silences the radio when a large amount of noise isbeing received. The desired signal must be moderatelystrong, stronger than the noise. Example: if a police broad-cast is being heard and the SQUELCH control is set to thepoint where disturbing background noises just disappear,the police broadcast will still be heard. When the stationstops transmitting (standby) no noise or weak stations willbe heard. This is possible because the SQUELCH control canbe set so that when the station stops transmitting, the re-ceiver "noise" increases and this "noise" is used to controlthe cutoff point of the audio amplifier.
The squelch control circuit can be used, only when theBAND SELECTOR is in the VHF position. When switch SWI-Ais in the AM or FM position, "noise" cannot reach thenoise amplifier to "cut off" the audio amplifier. When only
1,11
noise is present on the station, it will be amplified and fedto a rectifier circuit to provide bias voltages for the audioamplifiers. When an RF signal stronger than the noise isreceived, the noise will be blocked out. When noise is re-moved from the noise amplifier, the first audio stage cur-rent is reduced and the second audio stage is allowed toconduct normally.
The amount of noise received and the setting of theSQUELCH control determine the effectiveness of "squelch"action. The amount of noise amplified determines the rec-tified bias voltage to the first audio amplifier transistor. Thebias voltage of course controls the amount of currentthrough the collector to emitter circuit. Since the collectorof the first audio amplifier and the base of the second audioamplifier are common, an increase in the first audio col-lector current will result in a voltage decrease at the baseof the second audio amplifier. When the voltage at the baseof the second audio amplifier is low enough, it causes "cut-off." There is no output and noise is "squelched" until asignal from a transmitting station is received.
ZENITH
FM Multiplex Receiver Chassis 25Z7120-Biplex DetectorCircuit Description
The 121-347 PNP transistor used in the Biplex detectorcircuit, although not a bilateral transistor, exhibits bilateralcharacteristics. As a result, its function can be best ex-plained by the operation of a normal bilateral transistor.
A bilateral transistor is a special type in which the col-lector will serve as the emitter and the emitter will serveas the collector under certain conditions. When switchedby a properly applied ac voltage, in push-pull, sufficient invalue to overcome the cutoff bias normally applied, the bi-lateral transistor will pass current in both directions in ac-cordance with the alternations of the switching voltage. Theswitching voltage in this case is the regenerated 38kHz sub-carrier signal.
The transistor is not biased in the conventional manner.For the following refer to the illustration. The base isbiased at -16v while the collector and emitter are both
PlIER
IVli-1-,--1 I
TpI
Fioto 41__J 1
DMA WOW e(*)19MA/ WA SANDS
biased at -19v (as shown at the center -tap, terminal No. 6of transformer T12). The -19 and -16 are obtainedfrom the voltage divider consisting of the 1.2K and 470slresistors and TR12. Note that the collector and emitter areconnected to the opposite ends of the 38kHz output trans-former secondary winding (part of T12). Under no -switch-ing voltage conditions, the transistor is biased to cut offdue to the 3v difference between the 16v at the base andthe 19v at the emitter. To forward bias the transistor andcause current flow, the voltage at the emitter must be posi-tive or less negative than the voltage at the base. The re-quired forward bias is supplied by regenerated 38kHz sub-carrier (a CW signal) when the value of the 38kHz voltage
32ELECTRONIC TECHNICIAN/DEALER
exceeds the reverse bias between base and emitter.Referring to the illustration showing the input and output
waveforms of the 38kHz switching signal only, note that
-20v
0
J
the upper 38kHz input wave supplies the positive bias fromthe emitter to the base on the first half -cycle. At the sametime, the lower wave supplies the negative bias from thecollector to the base. During the second half -cycle the re-verse is true, but the action of the transistor is the samedue to the bilateral effect.
MOVING?
Be sure to let us know your new address.
Please enclose a complete address label
from one of your recent issues.
''IT'S GOOD BUSINESS
TO HIRE THE HANDICAPPED. -
ISN'T THAT A GREAT IDEA. SNOOPY?
THE PRESIDENT'S COMMITTEE ON EMPLOYMENTOF THE HANDICAPPED, WASHINGTON, D. C.
Yes, there's still a TV manufacturerthat looks out for the "little guy."
Okay, so you don't have the biggest, plushestshowroom in town.
That's fine with Setchell Carlson. We'd be pleasedto have you as a dealer. And we think you'll be pleasedif you become a Setchell Carlson dealer.
Why? Because we make every effort to pleaseboth you and your customers. Ours is the most reliablebrand you can find-ask any SC owner (or educationaluser or tv broadcast engineer). What's more,components in a Setchell Carlson exceed necessarycapacities. This means your customers experience farfewer circuitry failures. And far more satisfaction.
However, even the nest components sometimes fail.Should repairs become necessary, no other receiveris easier and faster to service. Because our Unit-Ized'chassis slips out for easy, quick repair or replacement.And since each of these units serves a single function,you can isolate trouble much faster. Best of all,Unit-Ized construction allows 99% of all SetchellCarlson service calls to be completed in the home!(How's that for a customer pleaser?) And there's nooutlay for additional servicing equipment.
We offer a full line of color television in commonsize screens and cabinets. Plus black and white in
still -popular sizes.These are but a few of the ways
Setchell Carlson looks after the smalldealer Maybe you should look intoSetchell Carlson.
DMS
Setchell Carlson, Inc.. 530 5th Ave. N.W.,St. Paul, Minnesota 55112
Yes, /'d like to look into a Setchell Carlson dealership.Send details.
NAME
ADDRESS_
CITY !STATE /ZIP
SETCHELL CARLSONgigioolapp D TELEVISIONv1010 ELECTRONICS DIVISION OF N.AROut Oil CORP 530 STIR AVE N W ST Paw MINN.SSII2
. . . for more details circle 122 on postcard
33JUNE 1969
34
The back. The front.
The back of our B&K 1450Oscilloscope/Vectorscopeput us in front.Notice the back. Clean, isn't it? That's becauseit's the back of the only osc lloscope/vectorscope with front vector inputs andcontrols.Now you can troubleshoot with this oneinstrument as an ultra stable oscilloscope; oras a vectorscope with this important exclusivefeature: the inputs are amplified! With thecontrol available up front, you can troubleshootat high level (the output of the color amplifiers),or at low level from the demodulator.The 1450 shows vector patterns exactly asspecified by color TV manufacturers.It also permits direct reading of peak -to -peakvoltages from two calibrated scales. (Simplyswitching to the range you want lights up theappropriate scale.)
YrYYn [MAU
stille,r1.11 tlaMt.,,I.
YII
CALLIBIAll
Ps
1/4
The front (and inside)of our B&K 1450Oscilloscope/Vectorscopekeeps us there.Our scope has an exclusive diagnostic devicecalled the intermittent analyzer, with electronicmemory and optional audio/visual remotealarm (model MON-45).With this sophisticated detection -reportingsystem, elusive intermittent conditions canbe caught and identified in your absence. Justpre-set one control: if the stage is faulty, itwill eventually be detected. And when it is, theintermittent indicator on the 1450 will turn onand stay on until you return from service calls.And all patterns are locked in at any signal levelor frequency by automatic synchronization.
Any way you look at it, the 1450 Oscilloscope/Vectorscope means greater shop efficiency, more time forprofit -making calls, and a lot more mileage from a very fine diagnostic oscilloscope. All from B&K-thecompany that put an end to ordinary test equipment (the kind that puts an end to your patience).Of course, we've tried to show you our good side-both of them. Now it's up to you to side with us. See yourB&K distributor soon-or drop us a note for more detailed information.
Model 1450. Net: $279.95.
Product of CYNASCAN CORPORATION 1801 W. Belle Plaine, Chicago, Illinois 60613
B&K puts an end to test equipment.We've developed "Silent Partners:... for more details circle 104 on postcard
ELECTRONIC TECHNICIAN/DEALER
Setchell Carlson s Model 2900portable color television
in a walnut cabinet.
JUNE 1969
TEKLAB REPORT
Setchell Carlson's
Model 2900 Portable Color TVCircuit study and plug-in construction can shortentroubleshooting time, making servicing more profitable
Every day we see more solid-state or hybrid circuitry on themarket employing etched circuitboards. This particular receiverrepresents a balance betweensolid-state and vacuum tube tech-nology.
Setchell Carlson is continuingits unitized concept and nowemploys an aluminum base chas-sis construction with ten etch-ed "plug-in" circuit board units.
This type of construction pro-vides the separation of circuitfunctions and aids in more eco-nomical servicing. The circuitboard substitution method allowsfaster isolation of the troubleand most repairs can be accom-plished in the home.
When we unpacked the Set-chell Carlson Model 2900 forthis Teklab report, the first thing
Unitized circuit boards are changed without tools.Positive electrical connection is assured by nylon catches
which hold the board firmly in place and allow quick removal.
JUNE 196.E
we noticed was the walnut cab-inet. Another feature is the con-sole -size 6 in. speaker, rare inportable models.
The front panel controls include:CHANNEL SELECTOR, UHFTUNING, FINE-TUNING, VOL-UME, TINT, COLOR BRIGHT-NESS and TV OFF/ON switch.
The controls on the back ofthe chassis which we feel shouldbe more conveniently placedfor ease of adjustment are: CON-TRAST, VERTICAL HOLD andHORIZONTAL HOLD.
Antenna terminals are pro-vided at the rear of the receiv-er to permit attachment of out-door antennas. A slide switchon the antenna terminal boardconnects the receiver to thebuilt-in VHF antenna or to anexternal VHF antenna which
VHFTUNER
PIN 5
ZB-101 VIDEO IF
5pf64vC29
RII6470 n
FD 6451SILICONDIODE220K
5f 1+64vC30 1 -
27K
Fig. 1 --Schematic showing the modification made to the tuner AGC circuitry.
CR1I8vZENER
100 nR14
B+ 24v
attaches to terminals directlybelow the slide switch.
When an external UHF an-tenna is used, the internal UHFantenna must be removed.
When the set was first turn-ed on, we were not overly im-pressed with the picture qual-ity. It happened to be an ear-ly model lacking the AGC modi-fications to the tuner and oth-er minor changes to several ofthe plug-in circuits. Once thesemodifications and the plug-incircuits from the manufactur-er were installed, the set pro-duced a good picture.
The modification made onthe tuner AGC circuitry is pro-vided here for comparison pur-poses and also as a point of in-terest to those with earlier pro-duction units. The tuner AGCcircuitry shown in Fig. 1 is usedon all Model 2900s and 2800sother than early production mod-els. Optimum performance willbe obtained from the new ZB-101 units with present tunerAGC circuitry. The tuner AGCcircuitry can be checked with-out removing the chassis byobserving the tuner through
the slots in the bottom of thecabinet. The tuner incorporatesthe latest AGC circuitry if the27K resistor is present on thetuner. If not, it can be modifiedin the following manner: CheckC29 and C30 for connection asshown in the schematic. Addthe 220K resistor and silicondiode if required.
The chassis employed on thisportable is divided into ten plug-in units and a common chassisinto which they connect. Actual-ly there are nine plug-in circuits,the tenth being the circular con-vergence adjustments and re-lated solid-state circuitry in onecomplete package with electri-cal connections made througha plug and socket.
TUNER
The tuner shown in Fig. 1
is a conventional turret -typeconsisting of the RF amplifier(Q1), mixer (Q3) and the oscil-lator (Q2). With the VHF chan-nel -selector in the "UHF" po-sition, the UHF tuner is suppliedwith collector voltage througha segment of the channel strip.
Transistor Q31 is then activat-ed as a UHF oscillator.
VIDEO IF AND AGC ZB-101
Because of gain/bandwidthrequirements in many specialapplications for which this re-ceiver is often used, four vid-eo IF amplifiek stages are usedinstead of the usual two or three.The video IF and AGC schemat-ic is shown in Fig. 2. Rather thanthe conventional keyed AGC,an amplified sync system wasdeveloped to permit employ-ment in certain video tape ap-plications. Transistors Q101, 102,103 and 104 are video IF ampli-fiers. Signal for the 4.5MHz sounddetector, D102, is taken fromthe collector circuit of transis-tor Q104. The secondary of theoutput IF transformer, T102,includes a 41.25MHz trap whichremoves practically all of thesound signal from the video de-tector, D101. The video detectorsignal passes to transistor Q106,an emitter follower which matchesthe impedance of the detectorto the low impedance of the con-trast control and following stages.
36 ELECTRONIC TECHNICIAN/DEALER
r.Mou, oCo
.02Stool YEWS MOON mo. 40.0mo C0100 e -CAST S4koo moOmo.40 uS2D O4 a.. 5 woo,,91025 Tr. Ty.. v
23v024 fr
9.03Alt
,.. 4
C.02
..;;22'
VIDEO IN I
Z11 -101A
0.05
742 4. 4AO
}Sr
r 24.2v
F;3i,1131
h'I .0
6.0v
LTMOONI '0" n. C:090031nu
.0055
f:,.
0.3
s
AFC 'AN -OF Aool), USED CM 11
Nots. Nr J.02C.
240
0.09125554
02
0.54
,2 oo4
6,2
0,32
LA
Tclo31 .3)
Oi2 rJOS9
2o,AS
II I
Fig. 2 --Four stages of video IF are employed instead of the usual two or three. A special sync system permits cer-tain video tape application.
Capacitor C121 and diode D105comprise a very effective noisegate. All of the noise pulses inhigher amplitude than the aver-age determined by the sync pulselevel will be shorted betweencollector and emitter of Q106and thus prevent signal or AGCoutput. Positive -going sync sig-nals are formed in the collec-tor circuit of Q106, clipped bydiode D104, amplified and in-verted by transistor Q105 andapplied as reverse AGC to thefirst two stages of the videoIF amplifier. This signal is de-layed by D103, amplified andinverted by Q4, further delay-ed by D1 and applied to the tun-er RF stage as forward AGC.Forward AGC is used on thetuner for best cross -modulationcharacteristics, while reverseAGC is applied to the video IFstages to minimize impedanceshift with varying signal lev-els. The AGC is adjusted todetermine the detector out-put level on strong signals.
VIDEO SYNC UNIT ZB-201The signal from the contrast
Over 90 percent ofall circuit com-ponents are moun-ted on 10 plug-inunits. Nine unitsplug into the chas-sis while the tenthmounts on the pic-ture tube.
Fig. 3 --TransistorsQ203 and 0204are connected asa Darlington pairand comprise thefirst chrome andsync amplifiers.
37
-701
020020
OS
C7ii
"I`lv
NuS,C0IMOD.
1172
72)KO
11,2S
2,4351.
A MC SuPtIdIralS 0171..10111.001.0 ,[1.2CAS.SWIM. 1.001.
C723
Fig. 4 --Schematic showing the chroma processing unit.
0.1.0111.
201
CHOOMA OSC.ZS -701A
007
*SO10.4
417
7000
control is amplified by the firstvideo amplifier, Q201, passedthrough the delay line to bringit into phase with the chromasignal and further amplified inQ202 and V201. (See Fig. 3.)The luminance signal is fed to thecathode of the picture tube. If itis necessary to adjust the lumi-nance drive to compensate fordifferences in picture tube guncharacteristics, a resistor network(R51 and R52) is provided on thecathode drive socket. The plug-incathode connections may be ad-justed as required but are nor-mally used in the maximum driveposition.
Transistors Q203 and Q204are connected as a Darlingtonpair and comprise the first chromaand sync amplifiers. Diode D201and transistor Q205 act as synclevelers before feeding the syncsignal to the sync separator,transistor Q206. TransistorQ207 is a blanking amplifierwhich, together with diodesD203, D204 and D205, shapesthe horizontal and vertical blank-ing pulses from the deflectioncircuits and applies them to thecathode of the video output tube.
CHROMA OSC ZB-701
Chroma is receivedfrom the video -sync unit, (Fig.4) which is tuned by coil L701and matched to the low imped-ance of the color control by theemitter follower transistor Q701.It is further amplified by trans-istor Q702 and fed through thebandpass transformer (T701) tothe chroma demodulators on thechroma output unit. V701, theburst amplifier, is keyed on duringburst time by a pulse from thehorizontal output transformer.The amplifier burst is appliedthrough T702 to diodes D701 andD702 which act as automatic phasedetectors. Their output signalcontrols the phase of the chromaoscillator tube, V702, to keep itlocked in sync with the burstsignal. When the burst signal ispresent, diode D703 develops anegative voltage which biases offthe color killer transistor Q703.If no color signal is being received,Q703 conducts and cuts off Q702.
CHROMA OUTPUT ZB-751
The chroma and chroma oscil-
lator signals from ZB-701 areapplied to the balanced demod-ulators, diodes D751, 752, 753and 754. (See Fig. 5.) The B -Y andR -Y signals are derived directlyfrom the demodulators and ampli-fied by transistors Q751, Q752 andthe red and blue amplifier sectionsof tube V751. Green is derivedby matrixing the red and bluesignals. It is then amplified byits section of V751, after whichthe chroma is applied to the CRT.
4.5MHz SOUND IF AMPLIFIERUNIT ZB-301
The sound detector on ZB-101feeds its signal through a 4.5MHzamplifier transistor ( Q301), a lim-iter -amplifier transistor (Q302),and then to the ratio -detectordiodes D301 and D302. Their out-put is passed through the volumecontrol to audio amplifier ZB-401.
AUDIO AMPLIFIER ZB-401
The audio amplifier is con-ventional and consists of am-plifier transistors (Q401 andQ402) in a Darlington pair driv-ing a class "B" output stage (Q403
38 ELECTRONIC TECHNICIAN 'DEALER
and Q404). Their output feedsa 16n speaker.
VERTICAL DEFLECTION UNITZB-601
The vertical deflection unitconsists of V601, the multivi-brator-amplifier tube and relatedcomponents. Its function is con-ventional except for diode D601,which permits the vertical syncsignal to be fed to the multivi-brator cathode but prevents thevertical retrace pulse from feed-ing back into and upsetting thehorizontal sync.
HORIZONTAL DEFLECTIONUNIT ZB-501
Horizontal sync is fed to aconventional phase detector(dual diode DD501) and usedto control the frequency of thehorizontal multivibrator tubeV501. (See Fig. 6.) The horizon-tal output tube V502 connectsto the output transformer. Thehigh voltage is regulated bytaking a reference voltage fromBoost B rand using it to controlthe regulator transistor Q501.Together with diodes D501 andD502. transistor Q501 regulatesthe high voltage by shaping V502'sgrid drive waveforms thus con-trolling the rate of change ofthe output plate current.
HORIZONTAL EFFICIENCYUNIT ZB-551
This unit (shown in Fig. 7) con-tains the damper diode D551 andthe efficiency control components.The horizontal efficiency coilL551 is adjusted for minimum6JE6 cathode current.
POWER SUPPLY
The power supply compo-nents are located on the mainchassis. Two separate full -wavesupplies are included. The 300vsupply feeds only the deflectioncircuits while the video outputcircuits are powered from the24v supply. (See Fig. 8.)
LPOONA COOP
Z5 751A
IT401_jet
4.
2110z.
?SSISO T/2
220
"
.44. IS
/
6MJ8
$ I
- .n® L
CIS! 12341f 014
-T
Fig. 5-Schematic showing the chrome output circuitry.
r.
o -
r )1 " NO:
cooTsoll)
:2.7
-L-r"
! colg.
T"
HI
1.10,0
OSOT
fb-
02 22S011404.2
3 SO r
ritA.pico,
aa.4
T'erc°00 Igowo own i'oat
irOOT(i)
+OnIS. 7To
Fig. 6 --The horizontal sync signa is fed to a conventional phase de-tector and is used to control the frequency of the horizontal multi -
vibrator tube.
,.1..M.'17..`11V`Ort
IF$1112.Z I - 551
Fig. 7 --Horizontal output tube cathode current can be measuredacross the fuse terminals on the main chassis.
1411431oRM, 300V
s;E. O lett!I : I CS,
Tac T,17,F.I,)1+,n. COO CI% 4_3
.06.
, 14111 I
(14,JIT114[114I
1-1 $.
c.«
42
.11.7 - " 'Os -
CSS.SOr 500, -
Olf OMSO,. IC I. 0.Ok rI.4
Fig. 8 --As shown in the schematic, the 300v supply feeds only thedeflection circuits. Video output circuits are powered from the24v supply.
JUNE 198939
TV Tuner ServicingThere are times when it is profitableto repair a TV tuner, and times when
it is more profitable to send it to aspecialist --knowing the difference can
save you a lot of headaches
1II
.........r -_,
AGC TEST POINTFig. 1 --The first step in isolating the trouble
to a tuner is to check the AGC actionby shorting the AGC test point to ground.
The tuner takes more of abeating than any other sectionin a TV set. With the averagefamily watching TV 46 1/2 hoursper week, it has been estimat-ed that channels are changed3000 to 4000 times per year!This puts quite a strain on thetuner and therefore they accountfor a fair percentage of TV trou-bles. The following symptomsare typical of problems oftencaused by a defective tuner:
(1) "snowy" picture(2) raster, but no sound or
picture(3) loss of UHF channels(4) loss of high or low VHF
band channels(5) streaking or flashing in
the picture(6) separation of sound and
picture(7) picture pulling(8) picture distortion(9) partial blanking of the
raster
FIX IT FAST OR FORGET IT
In addition to being one ofthe most common sources oftrouble, the tuner is undoub-tedly the most difficult to re-pair. For one thing, mechani-cal problems which don't applyto any other part of the TV setmay be difficult or impossiblefor the average technician tocorrect, even if he knows pre-cisely what is wrong. For an-other, few shops have the equip-ment to sweep and align a TVtuner properly. Finally, at thefrequencies involved, strangethings can happen. Just mov-ing a critical part physicallycan make the tuner inoperative.
It is because of the difficul-ty of repairing tuners in thefield that repair and rebuild-ing specialists have sprung upall over the country. (See listof specialists at end of this ar-ticle.) For an average of $10,these businesses will restoreany tuner to top working order.
This brings us to the primerule of tuner repair: If you can't
40 ELECTRONIC TECHNICIAN/DEALER
fix it fast, forget it! Don't wastea lot of time trying to do some-thing you're not equipped todo. Remember, you are in busi-ness to make money and timeis your most precious asset. Itmay give you satisfaction tolick a tough tuner after a coupleof hours of struggling, but italso costs you money.
The professional way to han-dle tuner troubles is: (1) makesure it's the tuner that is caus-ing the trouble, (2) clean thetuner thoroughly, (3) check thetuner quickly for obvious trou-bles, (4) if the trouble is easyto find and easy to fix, go ahead,(5) if you think the trouble maytake more than an hour to findand repair, send it to a tunerspecialist.
MAKE SURE ITS THE TUNER
Before you start to trouble-shoot a TV tuner, make sureit is really the tuner that's atfault. IF and AGC troubles of-ten cause symptoms that ap-pear to be tuner problems.
If the picture is snowy, forexample, too much AGC voltagemay be the problem. This is easyenough to check out. Simplyshort the AGC test point (seeFig. 1) to the tuner ground. Thisreduces the AGC voltage to zero,enabling the RF amplifier tooperate at maximum gain.
If shorting out the AGC im-proves the picture significant-ly, the trouble is in the AGC.If not, it is probably in the tuner.AGC voltages normally measureabout -1.5v. If the voltage goesbelow -3v, it often causes snow.
However, it is also possiblefor snow to be caused by theIF stages. This is rare, but you'dfeel foolish sending a tuner infor repair only to find out it wasreally an IF trouble. Therefore,it pays to check this out.
If you have a good IF sweepgenerator and a scope, this is anideal way to check the IF stagesfor proper gain.
If not, you can accomplish
approximately the same effectwith a little improvising. Startwith a known good TV receiv-er connected to an antenna anddisplaying a normal picture. Then,connect the IF cable from thetuner of the normal receiver tothe IF input of the receiver youare repairing. Be sure that youconnect the shield of the IF cableto ground and that the centerconductor is isolated from thedefective receiver by a couplingcapacitor. Don't use an ac/dc orline connected TV set as your goodreceiver because there may be adifference in potential betweengrounds on the two chassis.
If substituting a good tunervia this method brings in a nor-mal picture, you know yourproblem is in the tuner. If not,it's undoubtedly a chassis prob-lem.
Substitution of a known goodtuner, (preferably a similar tuner)as described above is, of course,an excellent method of isolatingany tuner trouble, making surethe tuner is at fault.
START WITH A CLEAN TUNER
Technicians often forget thatdirty tuners just don't workvery well. Tuner specialists re-port that many of the units theyreceive for repair need noth-ing more than a thorough clean-ing. Intermittent troubles, snowypictures, streaking or flashingpictures, and poor color responseare all troubles commonly caus-ed by corrosion or dirt on con-tacts.
In fact, many troubles canbe caused by dirty contacts.If a tube socket is dirty, for ex-ample, the tube pin fails to makecontact and the circuit doesn'toperate properly.
The best way to clean a tun-er thoroughly is with a high pres-sure washing or degreasing sprayas shown in Fig. 2. Don't usea spray that includes a lubricant.These sprays are fine for tunersthat are working, but a pure clean-er is normally more effective than
a combination cleaner/lubricant.Of course, you have undoubt-
edly tried new tubes in the tun-er before starting your servic-ing procedure, but don't leavethem in their sockets. Removethe tubes from the tuner andspray it thoroughly, includingthe tube sockets.
HINT: Never spray the neu-tralizing capacitor in a Nuvis-tor tuner. Even the best tun-er spray can cause permanentdetuning if used on this capac-itor.
TUNER CHECKUPOnce the tuner is clean, give
it a fast but thorough checkup.Remove the cover and start witha visual inspection. But be care-ful not to poke around inside thetuner or disturb the placementof components. Once a wire orcoil is moved, it's almost im-possible to get it back into theproper operating positionalignment equipment.
If your preliminary inspec-tion reveals a shorted or gas-sy tube, chances are that ex-cessive current has burned upor changed the value of a resis-tor. Burned resistors, of course,are easy to spot visually.
If your visual inspection re-veals no problems, make volt-age checks at the test pointsprovided. B + test points aremost likely to reveal trouble(some tuners have two or threeB +test points). Check the sche-matic for proper voltages. Yourreadings should be accuratewithin ± 20%.
Then make voltage -resistancechecks at the tube sockets. Sincetuners are so compact, the eas-iest way to do this is with a testsocket.
You can't expect the tunerto operate properly with testsockets in the circuit, but thevoltage and resistance readingsshould be fairly accurate.
If you read a low plate or screenvoltage it generally indicatesthat a series resistor has chang-
JUNE 196941
Tuner Servicing ...
Flg. 2-- Before troubleshooting the set, clean the tuner thoroughly.
Fig. 3 --In some sets, i1 may be necessary to remove the UHF tuner toget at the VH=
Fig. 4 --Once the tuner has been repaired, it should be sprayed with agood lubricant to keep it operating smoothly.
42ELECTRONIC TECHNICIAN/DEALER
ed value or a capacitor goingto ground is leaky or shorted.If the voltage change is inter-mittent, you can usually isolatethe defective part by sprayingcomponents with freezing so-lution.
A dead oscillator is most of-ten caused by a defective plateload resistor. You can tell wheth-er the oscillator is working ornot simply by checking the os-cillator injector voltage at themixer grid test point. In a tubedtuner, this voltage should beabout -1.5 to -3.5v.
In a solid-state tuner, youcan tell whether or not the os-cillator is working by checkingat the base of the oscillator. Youshould read about -1 or -2v. How-ever, in many solid-state tun-ers it's difficult to take this read-ing and you may be better offsending the tuner to a special-ist for repair.
In making resistance checks,don't overlook the balun coils.Defective baluns can often causesnow or loss of high and lowVHF bands. Careful resistancetests will usually turn up balunproblems quickly. Since thereare such a wide variety of balunconfigurations, however, it isimperative that you check theschematic before jumping toany conclusions.
Internal tuner voltages andresistances can be very diffi-cult to check. In many modernTV sets, for example, you haveto take out the UHF tuner inorder to get at the VHF tuner.(See Fig. 3). Some tuners, espe-cially foreign made and solid-state tuners, are simply too com-pact to get at. In this case, you'reusually better off sending thetuner out for repair.
REPLACING DEFECTIVE PARTSOnce you locate a defective
component in a tuner, your prob-lem is to reach it without dis-turbing a lot of wires. Tunerspecialists use tiny solderingirons and slim tools.
Be sure you obtain an exact
replacement for the defectivepart if possible. Otherwise thetuner may work, but not prop-erly.
Many of the problems youspot will not be easy to correct,especially mechanical problems.
If the defective part can be re-placed with an exact replace-ment, be very careful. Cut leadlengths to the exact length ofthe original and substitute thenew part for the old one with-out disturbing lead dress orcoils. Lead dress is especiallycritical in UHF tuners.
HOW TO SEND A TUNER
Let's suppose that you'veisolated the trouble to the tun-er, given it a thorough clean-ing, replaced the tubes, test-ed it and decided to send it outfor repair. There is a right way.
You'll save yourself a lot ofheadaches if you follow this pro-cedure:
(1) Disconnect the wires go-ing to the tuner, but don't un-solder them. Clip them witha pair of diagonal cutters, leav-ing a little of each colored wireon the terminals. This will makeit easy for you to reconnect thetuner to the chassis once youget it back, without relying onyour memory or taking the timeto make a drawing.
(2) Remove the mounting brack-ets from the tuner and fastenthem to the chassis. This waythey won't be lost. Lost brack-ets can take weeks or monthsto replace and impossible toexplain to an irate customer.
(3) Do not remove the tubes.Leave them snugly in their sock-ets. Tuners should always bealigned with the tubes the cus-tomer is going to use, so tubesmust be included. Make surethe tubes are in the center ofthe package and surround theentire tuner with at least 2 in.of other packing material.
You can make money with tun-er repairs if you use a commonsense, professional approach.
Tuners Inc.6302 5th Ave.Brooklyn, N. Y.
Castle TV Tuner Service, Inc.5713 N. Western Ave.Chicago, III. 60645
Castle TV Tuner Service (East41-92 Vernon Blvd.Long Island City, N.Y. 11101
Tuner Service Corp.817 N. Pennsylvania St.Indianapolis, Ind.
Tuner Service Corp.547-49 Tonnele Ave.Jersey City, N. J.
Tuner Service Corp.938 Gordon St.S. W. Atlanta, Ga.
Tuner Service Corp.10654 Magnolia Blvd.North Hollywood, Calif.
Mid -State Tuner Service1504 So. CollegeBox 1141Bloomington, Ind. 47401
Gem City Tuner RepairBox 6, Dable Station2631 Mardon DriveDayton, Ohio 45420
TV Tuner Service118 Third St. WP. O. Box 793Twin Falls, Idaho 83301
Precision Tuner ServiceP.O. Box 272Bloomington, Ind. 47401
Superior Tuner1377 N. Curry PikeP. 0. Box 368Bloomington Ind. 47401
J. W. Electronics1538 W. JarvisChicago, III. 60626
JUNE 196843
POST MARKER
COLOR TVSWEEP ALIGNMENT
Boost your efficiency in sweep alignmentby reviewing some practical procedures
using a post marker generator
1381K Model 415 solid-state sweep/marker generator.
Sencore Model SM152 sweep and marker generator.
Heath Model IG-57 TV post-marker/sweep generator.
A tuned amplifier, such asthe IF amplifier in a televisionreceiver, is designed to passa band of frequencies and re-ject frequencies outside of thisband. For example, a color tele-vision IF amplifier is designed topass frequencies between 41.67and 46.75MHz and reject fre-quencies below 41.25 and above47.25MHz. This wide passbandis obtained by having several IFstages each tuned to a differentpart of the band -- stagger tuned.
Alignment of this amplifierusing a standard signal gener-ator is difficult because eachstage has to be aligned individu-ally and the over-all responsechecked laboriously recordingthe output as the input frequencyis changed in small steps acrossthe band. Plotting the outputagainst frequency on a graphprovides a response pattern.
If you were able to tune thefrequency of the signal gener-ator at a constant rate back andforth across the frequency bandof interest, you could observethe output (after detection) onan oscilloscope and actually seethe response of the amplifier.This is what a sweep generatordoes. The output signal from thegenerator is a constantly chang-ing frequency over a selectedrange as determined by the tuningand sweep width settings of thegenerator. The rate at which theoutput is swept is low. For conven-ience it is normally set at the fre-quency of the ac line.
Markers are added to the re-sponse curve to show the fre-quency accurately at differentparts of the curve. They aregenerated by amplifying the lowfrequencies on each side of thezero beat that develops whenthe frequency of the sweep sig-nal passes through the markeroscillator frequency. Genera-ting markers external to theamplifier under test and addingthem to the response curve iscalled post injection. It is super-ior to a pre -injection system inwhich the marker signal is fedto the amplifier along with thesweep signal, because pre -in-jection markers can distort the
44 ELECTRONIC TECHNICIAN/DEALER
response curve or become lostin traps making sweep align-ment more difficult.
THE COLOR TV IF RESPONSECURVE
The ideal color TV IF responsecurve is shown in Fig. 1. Youshould become totally familiarwith this curve because it canbe an excellent troubleshootingaid. Note that the top of the curveshown is flat. However, somesets will have a dip in the top;others (the newer color sets)may have a rounded or "haystack" top.
The shape of the response curveskirts is also very important. Thepicture carrier (45.75MHz) andthe color sub carrier (42.17MHz)are approximately at the 50 per-cent points on the skirts. Colorsignal information 0.5MHz away(41.67MHz) must still pass throughthe amplifier, but the sound car-rier (41.25MHz) must be trappedout so this skirt has a fairly steepslope. The opposite slope is notquite as steep, but should riselinearly for best recovery of lowfrequency video information. Theupper adjacent channel picturecarrier (39.75MHz) and the loweradjacent channel sound carrier(47.25MHz) must be trapped outto prevent interference. Theamplifier has minimum or zerogain at these frequencies.
There are a number of thingsthat will affect the responsecurve. For example, if a trapis misadjusted it will be impos-sible to get the correct curveand a lot of time can be wastedif this is not recognized. Oneor more weak stages will alsogive a poor curve, so the tubesshould always be checked or sub-stituted before alignment isattempted. The design of anamplifier takes into accountthe internal tube capacity. Whentubes are replaced in an amp-lifier, a different internal capa-city could upset the alignment.
TV RECEIVER ALIGNMENTHINTS AND PRECAUTIONS
Disable the HV applied to the
CRT. This can be done by remov-ing the plate cap from the hori-zontal output tube. Then connectthe load specified by the manu-facturer from B to ground toapply the proper load to the lowvoltage power supply.
Another method of remov-ing hash and interference onthe response curve, sometimescalled "grass" (Fig. 2), is caus-ed by the horizontal output tube.One of the easiest ways to elimi-nate the radiation is to removethe tube from its socket. In serieswired receivers a dummy tube maybe used or a resistor placed acrossthe filament pins on the socket.If a compactron tube is used, thefilament pins are 1 and 12. Thenovar filament pins are 4 and 5.Connect a voltmeter across theresistor to be sure the voltagedrop is equal to the filament volt-age of the tube.
Interference from the verticalcircuits is generally a spike thatwill drift through the responsecurve and cause distortion as itpasses through. This type of inter-ference is caused by the verticalfrequency difference between theTV set and the sweep generator.Many sets have a "setup" switchthat can be used to disable the ver-tical deflection system and elim-inate the vertical interference.
Use care when adjusting atransformer or coil that has twoslugs as each slug may havetwo positions that appear totune to the correct frequency.The position farthest out fromthe center of the coil form iscorrect; the position near thecenter of the coil form is incor-rect because of coupling fromone coil to the other.
Use only the proper cablesthat are supplied with the gener-ator. Be sure the RF cable isterminated with its proper impe-dance. Keep the leads from theterminated cable as short aspossible at the point of connec-tion to the receiver under test.
Check that there are no groundloops between the pieces of equip-ment. This is done by observingthe trace on the oscilloscope whiletouching each piece of equipment.If the trace moves or changes
shape, check all ground connec-tions. It may become necessaryco ground all the cables at onecommon point.
Do not dress the sweep gen-erator output leads or demod-ulation input cable leads overthe IF board, IF coils or tubesas it may result in detuning oroscillation in the section undertest.
Use bias voltages as speci-fied by the set manufacturerof the receiver under test.
More accurate trap adjust-ments can be obtained by re-ducing the bias on the IF. Pre-vent overload of the IF circuitsby reducing RF signal from thegenerator.
Set the oscilloscope verticalgain control near its most sen-sitive position and keep the sweepgenerator output as low as pos-sible. This will prevent over-loading the IF amplifiers witha sweep signal which may pro-duce an improper curve.
GENERATORFEATURES
The post marker generatorproduces accurate markers atthe IF and RF frequencies spe-cified by most manufacturers.
The generator mixes the mark-er signal with the demodulat-ed signal from the circuit be-ing tested or aligned. Markersare normally well defined andshould not alter or distort theresponse curve of the circuitsinvolved. Therefore, the oscil-loscope will show the actual wave-
shape of the TV receiver beingchecked or aligned.
As many as eight markersmay be made to appear simul-taneously on an IF alignmentscope trace. This enables youto adjust the IF circuits for prop-er waveshape and bandwidth inless time than would be possibleif you were to use the old var-iable marker system which mustbe reset and calibrated for eachmarker frequency.
Additional post markers areprovided for color bandpassalignment, picture and soundcarrier frequencies, FM tun -
JUNE 196945
47.25
45.75 42.17
41.25 39.75
Fig. 1 --The ideal response curve of a color TV receiver.
111111111h
1111111,
"111111111
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111m
Fig. 2 --Horizontal interference in the response curvecaused by output tube radiation.
Waveform from Plate of6A05 SWEEP DRIVER
RETRACE
TRACE
1- 7BLANKING PULSE FROM
12AU7 PLATE
g
TO ATTENUATOR
Fig. 3 --Schematic of the sweep oscillator employed in the Zenith.
AA,
EE N1
TO HOOT. INPUTOF OSCILLOSCOPE 1m -
SWEEP SITUP
SHAPER02AUT1
DRIVER
164061
OSC.II2ATII/1/I
AT TENLIATOR
IF PULSE PULSE
DETECTORAMPT (FIER TRIGGER
CRYSTALS ;12417/ ILLAT71
TO P.
TERMINAL
ONSM.]
MAWROUT.
\ IF OUT.
UHF
IL EA
_
r--1UHF
TUNER
UNDERTEST
UHF
MARILER
(VMIALLEF
Fig. 4 --Block diagram of Zenith's Model SPTE-3 speed aligner.
DET.
utrENKAATTEN.
LO HWO.
PRE ATV.
(111-4341
INJECTION
CURRENT
TO OSCILLOSCOPE
er, FM IF, discriminator align-ment, and TV sound IF adjust-ments. Modulation is provid-ed for trap adjustment as wellas for checking and adjustingFM tuners.
ZENITH SPEED ALIGNERGENERATOR OPERATION
The heart of this typical gen-erator is the sweep oscillator.A dual triode, operated in paral-lel to provide adequate poweroutput, is connected in a modi-fied colpitts arrangement withits tank circuit -center tunedto 43.5MHz. The tank includesa variable inductance shownin Fig. 3 whose reactance de-pends on the amplitude of cur-rent flowing through it. By pro-viding a current of the properphase, shape and amplitude,the inductance of the oscillatorchanges at a given rate, thusproducing a frequency devia-tion which is used to providethe required sweep frequen-cy output. This method is su-perior to sweep techniques usinga synchronous motor and to aspeaker system with a special-ly designed spider driving asweep capacitor.
Markers are produced by firstsupplying a sample of the sweptoscillator voltage to a set of crys-tals. The sample voltage is ofsufficient amplitude to allowthe crystal to "ring," or oscil-late at its natural frequency.The resultant oscillator volt-age is then detected, amplifiedand shaped to provide the prop-er output marker "pip" displayon the scope. A block diagramof this generator is shown in Fig.4.
The 40MHz sweep oscillatoris also used to provide the ne-cessary signal for UHF tuneralignment. The principle of op-eration is similar to that encoun-tered in a normal superhetero-dyne receiver: an oscillator fre-quency mixes with an RF sig-
46 ELECTRONIC TECHNICIAN/DEALER
nal to provide an IF output. TheIF signal is then mixed withan oscillator frequency and theresultant RF frequency can beused as the signal source forthe alignment of the UHF pre-
selector circuits. The resultantoutput from the UHF tuner an-tenna terminals is detected andthen amplified for proper os-cilloscope display. A UHF mark-er at the channel sound carrierfrequency is injected at the de-tector to provide a means oftracking the oscillator rotorto a given calibration standard.A 50-0-50 microammeter is pro-vided to show injection voltageat all times when a UHF tun-er is being swept or adjusted.
DETERMINING THE ACCU-RACY OF THE SCOPE FORSWEEP ALIGNMENT
The oscilloscope is an impor-tant tool in sweep alignment.If it has poor low frequency re-sponse, a phase shift in the ver-tical amplifier or a phase shiftbetween the horizontal and ver-tical amplifier, the responsecurve on the scope screen canbe misleading as to the actualcondition of the television re-ceiver. Any of the above con-ditions can distort the responsecurve enough to give inaccur-ate results when the TV set isaligned. The Sencore SM152provides an ultra linear sweepand a flat, automatically con-trolled output which allows atest of the scope before align-ment is started. Once the scopeis tested, the results can be tak-en into consideration duringalignment to provide greateraccuracy.
The following procedure il-lustrates the use of the SM152to test an oscilloscope response:
1. Set the sweep marker genera-tor to the 10-55MHz range andthe tuning dial to about 43MHz.Set the sweep width to 15MHz.
2. Connect the RF cable us-
ing the 300f1 matching pad tothe detector probe (blue lead)input and the scope vertical in-put to the SCOPE V jack onthe generator.
3. Adjust the scope verticalgain until a usable pattern isachieved. If the scope has nophase shift and normal low fre-quency response, the patternshould appear as shown in Fig.5.
If it has a poor low frequen-cy response, the pattern willappear as shown in Fig. 6. Themore the pattern bows or tilts,the more undesirable the lowfrequency response. Some bow-ing or tilting of the pattern isacceptable, but it should be tak-en into consideration when ad-justing the television receiv-er. Other scope deficiencies areshown in Fig. 7 and 8. If anyof these problems appear toexcess, they will affect the re-sponse curve of the TV set.
The signal at the SCOPE Hjack is about 60v P -P. This volt-age is high enough to provideadequate horizontal drive formost scopes, but may overloadsome. This may be avoided byshunting the horizontal inputterminals with a suitable resis-tor. Turn the horizontal gaincontrol down about 1/3 frommaximum gain and try a fewvalues of shunt resistor untilfinding one which gives aboutfull screen deflection. For theSencore PS148, a suitable val-ue would be about 330K. Afterthe resistor is connected, theHORIZONTAL PHASE adjust-ment oil the rear of the SM152must be reset in accordance withthe manufacturers instructions.This adjustment will be set oncefor the scope used.
The next article will coveractual applications of sweepmarker generators in the align-ment of the TV receiver tun-er, IF, chroma bandpass andthe RF and IF amplifiers in FMreceivers.
JFig. 5--A normal scope pattern withno phase shift and sufficient low fre-que icy response.
Fig. 6 --The tilted or bowed patternshows poor vertical low frequencyresponse.
Fig. 7 --Pattern showing phase shiftin the horizontal amplifier.
Fig. 8 --Pattern showing phase shiftand poor low frequency response.
JUNE 196947
Solid -State Horizontal Deflection Systems The horizontal-deflection sy-stem employed in the RCA CTC40chassis is believed to be uniquein television designs currentlyon the market. The switchingaction required to generate scanand retrace yoke current, as wellas high voltage pulses, is accom-plished by two bipolar switches,each consisting of an SCR and afast -recovery diode. The essen-tial components of the system,including the high -voltage regu-lator, are shown in Fig. 1.
By using resonant LC circuitsin the design of the systems,switching transients, which mightdamage the solid-state devices, areavoided. Also, the total voltageacross the combination of theyoke and Cl is very low (approach-ing zero) during trace, and risesto only about 400v during retrace.
The circuits will be thorough-ly explained later but for themoment assume that the traceswitch is closed during scan timeand the retrace switch is clos-
ed during retrace time. There-fore, during scan time, the yokeand Cl are connected togetherin a resonant circuit whose periodis roughly twice one horizontal -retrace interval. During retrace,the retrace switch is closed andthe trace switch is opened. Inthis configuration, the yoke andCl become part of a resonantcircuit whose period is about twicethe horizontal -retrace interval.
RETRACE INTERVALAt a point about 312 s before
the end of a horizontal scan,near the right edge of the raster,SCR2 starts to conduct by apositive trigger from the hori-zontal blocking oscillator. Theconditions which exist in thecircuit just after SCR2 is trig-gered into conduction are shownin Fig. 2. The charge on C2, 270to 300v, causes electron flowthrough the yoke an Cl to groundand then through SCR2 and
Ll to C2. Current also beginsto flow from C3 to ground, upthrough SCR2, Ll and back tothe opposite side of C3. Sinceeach of these circuits is reso-nant, current rises sinusoidallyrather than instantaneously.At the time SCR2 is driven intoconduction, a current of about4a already is flowing in the yoke,Cl and SCR1. As the current fromC2 increases toward 4a, the cur-rent through SCR1 decreasestoward zero. When the currentfrom C2 exceeds the yoke cur-rent, the additional current fromC2 passes through CR1, SCR2,Ll and back to C2. This conduc-tion through CR1 removes for-ward bias from the anode ofSCR1, causing cutoff.
The conditions at the startof retrace are shown in Fig. 3A.Current through the yoke hasreached maximum at the momentretrace begins and thereforethe field around it is maximum.Then the field begins to collapse,
LI
TRACESWITCH
1(\SCRI CRI
C)CR368V
of
cxcx
YOKE440oh
PINCUSHIONTRANSFORWR
1
H VADJUST
L IN
-0120
CI
15O
C6
T4
NVXFMR
Fig. 1 --Simplified schematic of the horizontal deflection system employed in RCA Victor sCTC40 chassis.
4HELECTRONIC TECHNICIAN DEALER
With this troubleshooting method,
you should have no difficulty servicing SCR sweep systems
causing the yoke to be the energysource for retrace deflection.Since electrog flow is from posi-tive to negative within a source(as in a battery, for instance),the top of the yoke (junctionof the yoke and C2) swings posi-tive. This cuts off CR1, and SCR1cannot conduct because no triggerpulse is present at its gate. Thetrace switch is open during re-trace. The yoke current decreasesfrom its maximum value at thebeginning of retrace to zero about5.5ps later, because of circuitresonance.
Once the yoke current hasdropped to zero, it increasessinusoidally in the opposite di-rection and rises to a maximumvalue of about 4a. This completesthe retrace deflection of theCRT. The resonant circuit of whichthe yoke is a part during retraceconsists of the yoke itself, capac-itators Cl, C2 and C3. The reso-nant frequency of this circuit isabout 45.5kHz, so the time re-quired for, one cycle is about 22ps.( F= 2 7T VI T). During retrace,current in the yoke changed frommaximum in one direction to maxi-mum in the opposite direction --only one-half of a cycle requiringabout lips retrace time.
During retrace time, a secondresonant circuit Fig 3B also is ofinterest. This circuit consists ofLl and C3, resonant at about100kHz. Since capacitor C3 iscommon to both resonant circuits,there is a continuing interchangeof energy between the two duringretrace.
The high -voltage transfor-mer and capacitor C4 are notshown in Fig. 2 because the im-pedance of this branch is so highthat it does not present a sig-nificant load on the deflectioncircuit during trace time. Duringretrace time, the transformerbecomes a fairly well -match-ed load for the yoke and it ex-
tracts power from the deflec-tion circuit. This power, of course,is ultimately used in high -volt-age circuit.
At the end of retrace, shownin Fig. 4, the yoke current isat maximum and begins to de-crease. The field around theyoke begins to collapse, andthus the yoke itself is the energysource. The yoke end connect-ed to C2 and CR1 becomes nega-tive, and electrons flow in theresonant circuit consisting ofthe yoke, CR1 and Cl resulting incurrent decay which is sinusoidal.
The current in the resonantcircuit consisting of Ll, C3 andCR2 reverses, cutting off CR2.SCR2 has no trigger pulse ap-plied to its gate, so it remainscut off; therefore the retraceswitch is opened by Ll and C3.
When the retrace switch wasclosed, C5 was effectively short-ed but with the switch open itis in a resonant circuit with Lland C3.. This allows currentto flow back into C2 and a posi-tive pulse of voltage appearsat the junction of C5 and Ll.Again the current reverses, andCR2 conducts a second time. Be-cause of resistance in series withC5, as well as the action of T1and T2 (to be discussed), cir-culating current in Ll, C3 andC5 drops to insignificance afterthe time shown in Fig. 4B. There-fore, the retrace circuit is in-active during the remainderof the trace interval.
TRACE INTERVALThe circuit action during the
scanning (or trace) interval isshown in Fig. 5. During thefirst half of this interval, yokecurrent decreases sinusoidallyfrom about 4a to zero. Duringthe second half of this interval,the current reverses and increas-es sinusoidally toward 4a. This
half -sine -wave of current causesthe beam to be deflected fromleft to right across the screenlike reading a typed page.
In order to have current flowthrough SCR1 during the secondhalf of the trace interval, thisdevice must be gated on. A posi-time gate voltage is derivedfrom the secondary of T1 duringmost of the trace interval. Thuswhen the anode of SCR1 becomespositive at mid -trace, the devicecan conduct. The positive gateis removed when retrace is in-itiated, and the positive anodevoltage is removed shortly after.
LINEARITY CIRCUITSThe yoke current just describ-
ed cannot produce a linear sweep,since it is essentially sinusoidal.Two circuits are used to providelinearity. One is not shown inthis article. It consists of a 4.70resistor shunted across one turnof the high -voltage transformer.This combination is connectedbetween SCR1 and CR1 so thatthe instantaneous voltages onthese devices are slightly differ -ent.
The second linearity circuitis shown in Fig. 1. The coil andcapacitor connected betweena winding of the high -voltagetransformer and the junctionof the yoke and Cl are tunedto approximately the secondharmonic of the scan frequency.The circuit is shock excited duringretrace time, and during scantime it adds a second -harmoniccurrent to the yoke to make thetotal current nearly a sawtooth.
POWER INPUT CIRCUITTo understand how energy
from the power supply is sup-plied to the deflection system,it is necessary to consider thefunction of T1 and T2. During
JUNE 196949
01550CURRENT DROPSTOm--- ZERO
YOKE CURRENTABOUT 4a
CURRENT INCREASESFROM ZERO TO 40
/ICURRENT IS'IS' CuRRENT DECREASESTOTAL OF lax 5 Ica FROM 4a TO ZERO
YOKE
A FIRST PART OF INTERVAL
.I55o
URRENT NEAR ZERO
SCR 2
RISES TOABOUT i3a
TORE CURRENTABOUT 40
RISES FROM40 TO 70
YOKE
C2
CR
RISES TO RISES TOABOUT 6o ABOUT 3o
B SECOND PART OF INTERVAL
Fig. 2 --Circuit action during the 311s interval before retrace.
.1550
CURRENTDROPS TO ZERO
A FIRST HALF OF RETRACE
YORE CURRENT DROPSTO ZERO AT CENTEROF RETRACE
CURRENT DROPS TOZERO NEAR START OFRETRACE
1.1550
RISING FROM ZERO
RISES TO 3 SoTHEN DROPS TOZERO
B SECOND HALF OF RETRACE
CURRENT DEPENDS
C2
RISES TO 40 ATEND OF RETRACE
Fig.3--Circuit actionduring retrace. First half of retrace is shown in Fig. 3A.
.55......c_2LakE NI SMALL
VOLTAGE RISES TOABOUT 100 VOLTS
C2
C3
CURRENT RISES, THENDELAYS TO ZERO
CURRENT ISABOUT 40
''''v CURRENT INCREASING
LIC2
'L SHORT CURRENT PULSE 1 CURRENT SLOWLYOF ABOUT 4 So DECREASING
FROM 40
AB,,T 5,s AFTER 1 R PO r0 Sus AFTER RETRACE
Fig. 4 --Circuit action at start of trace interval.
155r
CURRENT MAX AT20-25. AF TERSTART OF TRACE
C3 CHARGINGCURRENT
C3
A FIRST HALF OF TRACE
C2 CHARGINGCURRENT
mo.
C2
0
CURRENT FALLSFROM 40 TO ZERO
155.LL,FIRLTF, FALLS TO ZERONEAR ENO OF TRACE
C2 CHANGINGCURRENT
C3 CHARD NGCURRENT
VOLTAGE ABOUT --
0300 WHEN CURRENT IC3REACHES ZERO
POSITIVE GATEFROM Ti
,F SECOND HALF OF TRACE
Fig. 5 --Circuit action during trace interval.
C2
CURRENT RISESFROM ZERO TO 40
retrace (Fig. 3) these transform-ers are connected between B +and ground. This interval is soshort that the current rises onlyto a small value. During scan time,the right end of C2 is connectedto ground by the trace switch.A series resonant circuit existsbetween ground and B +. Start-ing from ground, the componentsare C2 and C3 in parallel, Ll, andthe parallel combination of T1and T2. This circuit is resonantat about 5100Hz if no currentflows in the control winding ofT2, which is a saturable reactor.
At the start of trace, the volt-age across C2 and C3 begins torise, reaching a maximum in one-fourth of a cycle, or 4903. Sincethe scan interval is about 5203and SRC2 begins conductionabout 303 before the end of thescan interval, the voltage acrossC2 and C3 is maximum at themoment when the retrace switchis closed. This voltage is slight-ly less than twice the supplyvoltage, or about 300v, and itis the energy which is suppliedto the yoke and high -voltagecircuits during retrace.
HIGH VOLTAGE REGULATION
If high voltage suddenly beginsto increase, the voltage acrossCl (Fig. 1) increases. This causesthe regulator transistor, Ql,to conduct more, allowing a great-er current to flow in the con-trol winding of T2. This tendsto saturate the core of T2, lower-ing the primary inductance.But T2 is part of the resonant
circuit through which C2 andC3 receive energy from the powersupply. Reducing the inductanceof T2 raises the resonant fre-quency of the charging circuitso that the voltage on C2 andC3 passes through at maximumand begins to decrease beforeretrace is initiated. This, of course,reduces the amount of energyavailable to the yoke during re-trace, and stabilizes the HV.
SERVICING
From the servicing point ofview, the design of the deflec-
50 ELECTRONIC TECHNICIAN/DEALER
tion system offers several dis-tinct advantages. Possibly themost welcome of these is thatthe loss of drive (horizontal -oscil-lator failure) is not destructiveas it is in vacuum --tube circuitry.No more incinerated 6JE6s andsockets are caused by oscillatorfailure. Also, since the yokeand the high -voltage transform-er are effectively parallel loadson the deflection system, it ispossible to isolate, the high -vol-tage transformer without dis-abling the deflection system.This, of course, makes it a simpletask to determine whether thefault is in the yoke or the trans-former.
While space does not permita description of the symptomsattending the failure of eachcomponent, it is possible to iso-late faults into three generalareas of the circuit quickly andaccurately. Referring to Fig.1, notice C2 isolates the trace
circuit from B +. Therefore, onlyshorted components in the re-trace circuit can overload thepower supply if trigger is removed.By removing the lead to the gateSCR2 and observing whether ornot the circuit breaker trips atswitch -on, shorts may be isolatedto the retrace circuit.
The second step in isolatingfaults is to short directly acrossthe trace switch (SCR1 to ground).When the set is switched onwith SCR1 shorted, the powersupply will not be overloadedunless trouble is present in theretrace circuit, or the triggerpulse to SCR2 is at fault.
The next step in isolating trou-ble is to disconnect the high volt-age transformer at its junctionwith C4. Before turning theinstrument on with the trans-former disconnected, reducethe line voltage to less than 100vto prevent exceeding the PIVor CR1, then turn the instru-
ment on. If the power supplyoverloads under these condi-tions, the fault is in the tracecircuitry; if it does not overload,the problem is the high -voltagesystem. Observation of the wave-form at the anode of SCR2 alsois helpful in isolating faults. Theappearance of the waveformunder various circuit conditionsis shown in Fig. 6.
This system simplifies ratherthan complicates servicing ofthe horizontal system. Becauseof the relatively low operatingpotentials and the absence ofswitching transients, it appearsthat this circuit or variationsof it will become common in thenot -too -distant future. Witha minimum of effort in learn-ing how the circuit works anda logical troubleihooting pro-cedure, as outlined, the aver-age technician should have nodifficulty servicing SCR sweepsystems.
Fig. 6 --Waveform at anode of SCR2. (A) Normal operations, brightness minimum. (B) Normal operation, brightness maximum.(C) Q1 shorted, any brightness setting. (D) T2 primary open, any brightness setting. (E) SCR1 shorted. (F) Capacitor C3 reducedto .0022 i f. (G) HV transformer disconnected, no circuit faults. (H) HV transforner disconnecter, capacitor C3, reduced to.022iif. (I) HV transformer disconnected, C1 leaky (100).
1 1ker.
L
1 1
JUNE 1969
DEALERFAXADVERTISING/MERCHANDISING/SALES/BUSINESS MANAGEMENT
Service -Dealers Promote TechnicianActive recruiters engineered their own technician training program
If you lack good service menin your city, don't waste yourtime complaining --do somethingabout it. Get together with oth-er dealers who have the sameproblem and then interest acollege in your area in estab-lishing a training course.
"That's just what we did inDallas," reports Tilman Babb,president of the Wilshire Tele-vision Sales and Service. Babb'spartner, Gilbert Smith, is oneof the five Dallas dealers ser-ving on the Advisory Commit-tee to the Television and Ra-dio Repair Course at the El Cen-tro College.
The course began in Septem-ber and El Centro College's as-sistant dean, Dean Van Trease,says that the "response wasamazing." There are now 26men enrolled, ranging in agefrom 18 to 45 and the college
111,
The Advisory Committee meets (left to right) with Dean VanTrease, assistant dean of El Centro College (standing) seatedis Richard Kozelski, Kozelski Electronics with Dawes Skeenof Ace Television and Gilbert Smith of Wilshire Televisonat extreme right.
has invested $105,000 to pro-vide the students with the lat-est and most modern electron-ic equipment.
"The interest in this classhas been so great that we areplanning to offer it in our nightschool this coming fall," VanTrease indicates. He believesthis course to be the only oneof its kind in Texas, and oneof very few in the country.
In addition to Smith, the Advis-ory Committee includes: "DawesSkeen, Ace Television Sales andService; Dee Sponsel, SponselRadio and TV Service; Doc Chil-ders, Childers Radio and TVService; and Richard Kozelski,Kozelski Electronics -- all dealersin Dallas. The purpose of this com-mittee is to help establish cur-riculum and evaluate the pro-gram.
The course has already been
52 ELECTRONIC TECHNICIAN/DEALER
Training
pledged the support of the Tex-as Electronic Assn. and will soonbe brought to the attention ofhigh school students and theirparents in the Dallas Countyarea by the Second Annual Tech-narama which will be held inEl Centro College.
However, before offering apattern - that - your - community -can -follow, Van Trease offers thisadvice: "First, make sure thatthere is a need for such a classin your community. Secondly,make sure that you get a goodadvisory committee of dealerswho have been successful be-cause of their good service. Thereis no doubt that in most com-munities there is a strong needfor such a course. And it willtake educators a long time tosaturate the present needs."
The El Centro College edu-cator reveals that in additionto the night school class alreadybeing considered for the fallcurriculum, serious thoughtis being given to an advancedcourse in electronics to be giv-en to men already in the tele-vision and radio business.
Babb urges dealers in oth-er communities to follow theDallas example. "These cour-ses will make more qualifiedtechnical people available andyou owe it to your community.The electronic industry is chang-ing so fast, that unless you haveaccess to men with training onthe latest and most modern ofequipment, you as a dealer justcannot keep up with it."
Babb outlines a few points
44,744fiur
rr.14/
he feels necessary to a profita-ble and successful service busi-ness:
1. Have properly trained per-sonnel.
2. Maintain excellent custom-er relations.
3. Make adequate charges forthe work performed.
4. Maintain a proper volume.5. Consider the possibility of
selling service contracts.6. Use the service department
as an aid to sales.The technicians at Wilshire
Television receive constant train-ing at monthly store meetingsand by attending courses giv-en by NARDA and by the Tex-as Electronics Assn. Babb in-dicates that technicians shouldbe encouraged to take courseslike the one Dale Carnegie of-fers so that they can meet thepublic well. "The sales abilitythey can gain from such cours-es will not only enable themto sell the service that the cus-tomer's set needs, but also tosell the customers on the limi-tations of the product," Babbstresses.
"This may sound negative,but many customers purchasea radio, TV or stereo and ex-pect too much in the way of per-formance. This is not alwaystheir fault. Many times, fromwhat the salesman or the ad-vertisements have said, theyexpect a perfect picture at alltimes. And when the picture isn'tperfect, they blame the tech-nician. For this reason, the tech-nician should be able to express
The class receivesup-to-the-minutetraining with morethan S105,000 inmodern electronicequipment at theirdisposal.
63
Students interested in television and radio service classes range in age from18 to 45 years.
himself well so he can providea proper explanation to the cus-tomer and maintain goodwill."
Keeping service records with8000 customer cards in the fileshas also helped tremendouslyin achieving a periodic main-tenance schedule on customersets. As Babb points out, "Thesecase histories enable us to givethe customer a quick and accur-ate report on his set. If we didn'tknow the last time we servic-ed the product, what we didand what we charged for, wecould lose both time and a cus-tomer. It takes work, but it isworth it.
"We do not attempt to do ma-jor repairs in the home. An au-to mechanic will certainly notcome to your home to overhaulthe transmission of your car.The technician making homecalls must be able to determineif a change of tubes will repairthe set, and if not, be able togive the customer a reliableestimate of the work that hasto be done in the shop."
Important, too, in a thrivingservice business is a good em-ployee - employer relationship,Babb admitted. "We pay ourmen a salary and a small com-mission. We have found thisto be best. We also have a pro-fit-sharing plan for our employ-
ees. I don't know for sure if aprofit-sharing plan works, butI am inclined to think so. We havemen who have been with us for6 to 14 years and we believe thatlong tenure breeds loyalty andloyalty pays off where the cus-tomer is concerned." Wilshiretelevision also furnishes uni-forms, white dress shirts, ties,wool trousers and even cover-alls for the antenna men whenthey go under the house or on theroof. "Expensive yes, but wethink it is worth it," Babb re-ports. "We also provide a hos-pitalization plan which givesan employee medical care ina hospital up to 70 days and an$11,000 life insurance policy.Both insurance plans are unu-sual because we bear the en-tire cost, while many such plansexpect the employee to pay partof it," he says.
The technician training pro-gram, in which it is actively in-volved, and maintenance of itsown highly trained staff haspaid dividends for Wilshire Tele-vision. It sells its customersthrough better service and asBabb indicates, "Many of ournew customers come to us asreferrals. If you do a good job,you'll get additional businessand a reputation that can't bebeat."
Tilman Babb checks the repair recordswith one of his servicemen. The filesContain 8000 cards.
54 ELECTRONIC TECHNICIAN/DEALER
TEST LAB REPORT
Darcy DM330 Digital MultimeterA low-cost digital multimeter combines thefunctions of a milliammeter, an ac -dc volt-
meter and an ohmmeter to increase your serviceefficiency in today's space-age circuitry
I MD141.11.111111111111
We ordered the Darcy DM330digital voltmeter to evaluateit in test lab because more andmore shops are purchasing unitsof this type for their versatil-ity, speed and accuracy -espe-cially for transistorized service.The unit came packed in a heavybox filled with cut cardboardwhich literally suspended it.
The first thing we noticedabout the DM330 was its easeof operation and the sharp read-out display. Packed with theunit is a service/operating man-ual which explains all of the oper-ating ranges and contains com-plete maintenance proceduresand replacement parts list.
The DM 330 is a transistorizeddigital multimeter for measur-ing dc volts, de current, ac voltsand ohms. It operates on eith-er 117 or 220vac. The operatingvoltage must be specified whenthe unit is ordered, but it canbe easily changed later by re-ferring to the manual.
The instrument provides fiveresistance ranges from 1K to
DIGITAL MULTIME TER 33;.n PINY.
1
Darcy Model DM330 digital multimeter.
for more details circle 900 on postcard
lOmeg, ac and dc volts from lvto 1kv and de current from 1iAato 10ma. All operating controlsare push-button operated andthe readout display automatical-ly indicates the type of measure-ment (vac, vdc, K 0, ma, pa) andthe polarity. Decimal point po-sitioning is also automatic.
The display provides a fullthree -digit readout with a 50percent overrange on all rang-es. This means if you measurea voltage on the 0-100vdc range,it is possible to actually readup to 1500e. If the measuredvoltage goes over 150vde, anoverrange indicator will comeon which tells you to go to thenext higher range --in this case,1000vdc.
Digital test instruments, ofcourse, have several importantfeatures such as speed, accur-acy and high input impedance.We first tested the DM330 ona transistor TV set to note thecircuit loading effects.
The DM330 has three inputterminals on the front panel
which are designed to acceptstandard voltmeter leads. Be-sides the normal black and redterminals found on most meters,the unit has a third "GUARD"terminal which is used whenmeasuring with shielded testleads. The GUARD terminalis normally connected to theblack ground terminal unlessshielded leads are used.
The manual says to start withthe unit on the highest rangeif the measured voltage is un-known, just as with a conven-tional meter. Since we alreadyknew that the transistor circuitwould read less than 20vdc, westarted out on the closest range,100vdc. The circuit voltageswere less than 10vdc in this caseand the manual says to reducethe range until the overrangeindicator lights and then go backto the next higher range. Wewere reading voltages between2.5 and 8vdc and the overrangeindicator came on when we reach-ed the lvdc range, so we went
Continued on page 69
JUNE 1969 55
TEST LAB REPORT
B&K Model 1077 television analyst, showing test pattern produced.
B&K Model 1077 Television AnalystReduce service timeby employing signal
injection to isolatecircuit defects
for more details circle901 on postcard
With more transistorized tele-vision receivers to service, wemust change our service tech-niques. We believe that one ofthe fastest methods is the useof signal injection to isolate adefective stage. The finger onthe volume control method tocheck the output stage of a ra-dio is a simple form of signalinjection. Unfortunately it isonly useful in limited applica-tions.
Actually, having a televis-ion analyst is like having a TVstation of your own. You caninject your own TV signal atany time or point to isolate in-termittent or general TV trou-ble while viewing the test pat-tern on the screen.
As we unpacked the analystfor this report, we comparedit with the Model 1076 whichhas been a part of our test labequipment for some time. Thereis some resemblance in size,but the 1077 has a more mod-ern panel.
One of the panel features firstnoticed was the addition of aUHF output. And many of theearlier 1076 circuits were re-vised for testing transistorized
TV sets with complete safetyby providing the proper imped-ance match for transistorizedcircuitry.
For those who are unfamil-iar with the television analyst,here are a few of the signalsthe unit will generate. (1) Allsignals normally transmittedby a TV station and those pro-duced within a TV receiver forpoint -by -point signal substitu-tion. (2) UHF signals on chan-nels 14 through 83, VHF chan-nels 2, 3, 4, 6, 7, 8, 12 and 14 fortesting tuners. (3) IF signalsof 20 to 48MHz for testing IFamplifier stages. (4) A positiveor negative composite videosignal for injection into videostages. (5) A keyed color barpattern which modulates theRF output for troubleshootingand adjusting color circuits.(6) A color rainbow signal forinjection into color amplifiersand demodulators. (7) 4.5MHzsound channel test signal thatis frequency modulated by 1kHzaudio tone and a 1kHz tone foraudio circuit testing. (8) Com-posite sync pulse signal of posi-tive or negative polarity, ad-justable in amplitude with var-
56 ELECTRONIC TECHNICIAN/DEALER
GRIDDRIVE JACK
Y60 0.VENTOSC
VIA
VERTICALOUTPUT
VII
:LATE OR IvE PLATE DRIVE
omPL IF IER OUTPUT ACK
V3 HORIZ GRID1-< PIA JACK
tI ,750 Ni
H RIZONTAI.
OSCILLATORV7
HORIZONTALOUTPUT
VIA
OLIVER
VII
AGC REAING
PULSE NCR
1REE
RECO IF IER
VT1
CA THOD
RAY TUP04
SLIDE
PaPNOT 0
NULE IPL TER
TUBE
ANC
MIXER
VOA
I KM:OUT A ,r
50111 PHASEINVERTER
SPA
REACTANCE
TintNA
189 Roy
OAR
GENERATOR
3.563 RixCOLOR
OSCILLATOR
COLOR
OUTPUT
LACK
VIOE 0
OUTPUTJACK
v10(0PHASE
INVER
SYNC
UTPU-ACK
4.5 MHz
OSCILLATORVI48
A4.5 MaOUTPUT
JACKOSC IL LA I OR
04
Block diagram of the television analyst.
SNORTEDTURNS
GENERATOR
PL TRACK YOKE
TEST SIGNAL JACK
BIASPOKERBIASJACKS
03
y131
01000
ANT G /M111 /
HE ONLY
moipui
NCR
iable impedance for troubleshoot-ing sync circuits, picture tubes,blanking circuits and transis-torized keyed AGC circuits.(9) Vertical and horizontal griddrive signal for troubleshoot-ing sweep circuits. (10) Verti-cal plate drive signal for check-ing vertical output transform-ers. (11) Vertical yoke test sig-nal to determine if vertical yokewindings are defective. (12) Hori-zontal plate drive signal for check-ing horizontal output transform-ers. (13) A high level keyingpulse for testing keyed circuits,AGC, burst amplifiers and blank-ing.
There are a number of otheruses for the analyst such as:generating a test pattern forcolor convergence adjustments;checking bandwidth resolution,shading and contrast capabil-ities of the TV receiver; display-ing pictures on the TV screen foradvertising and as a transmit-ter for video paging at conven-tions, hospitals and other gath-erings.
One particular feature wewould like to see added is a hori-zontal and vertical grid drivesignal to drive transistorized
sweep circuits. We feel this wouldbe of great value in servicingthe smaller transistorized sets.
The scanning section is theheart of the analyst. It consistsprimarily of the CRT and thephoto -multiplier tube. Basical-ly, the scanning circuit providesthe following functions: A dotof light scans the CRT. A slidemasks the light which reach-es the photomultiplier tube andthe photomultiplier tube con-verts the light into a video sig-nal that is equivalent to the imageon the slide.
An electron beam scans theface of the CRT just as in a TVreceiver. As the electron beamscans, it produces a flying dotof light. The light is directedtoward a photomultiplier tubewhich produces an output sig-nal proportional to the amountof light which strikes it. A posi-tive transparency slide is insert-ed between the cathode ray tubeand the photomultiplier tube.As the small spot of light sweepsacross the slide from left to right,light passes through the trans-parent portions of the slide andan output voltage is produced bythe photomultiplier tube. When
the spot passes behind the blackparts of the slide, no light reachesthe photomultiplier tube and nooutput voltage is produced.
Shades of gray in the trans-parency will produce some out-put voltage, but less than thefully transparent areas. Thus,as the entire slide is scanned,the photomultiplier tube willproduce video signal voltagesequivalent to the side image.
After the repair is complete,the analyst can be used to testthe over-all performance of theTV receiver. The receiver canbe checked for RF sensitivity,AGC action, centering, size andlinearity, shading, resolution,bandwidth and frequency re-sponse.
The manual supplied withthe instrument is almost a com-plete television repair coursein itself. It takes you step-by-step through the various stag-es of operation and covers pro-cedures, symptom analyses andtroubleshooting techniques. Thetroubleshooting procedure sec-tion with its condensed chartsprovides a quick reference tosymptoms, causes and cures. Netprice is $379.95. IN
JUNE 196957
DEALER SHOWCASEFor additional information on products described in this section, circle thenumbers on Reader Service Card. Requests will be handled promptly.
FM/AM Stereo Receiver 704Deluxe receiverat a moderate price
The KR -I00 stereo receiver featuresa silicon power transistor amplifiersection with 140w of music power
(IHF) at 4I/, 110w at 85/. It reported-ly has distortion rated less than .5 per-cent and a frequency response of 13to 70,000Hz. The inputs accommodatethe most complex stereo system re-quirements including provision for twoturntables. There is a separate preampoutput as well as two pairs of stereospeaker outputs plus center channel. Italso features a 1.8 pv RF section. Fourintegrated circuits and two field-effecttransistors (FET) permit excellentFM selectivity and reception, and thelow IM distortion delivers clear low -to -high-level listening. fea-tures include: front panel jacks fordubbing/tape record and headphone;push-button controls to regulate inter -station MUTING, LOUDNESS control,tape monitor and low and high filters.Price is $299.95. Kenwood.
Speaker 705Designed for solid-state components
Announced is the S20 controlledimpedance speaker system designedfor solid-state components. The sys-tems' Mediterranean styling featuresan antiqued pecan finish with ornatescrollwork grills. A flamenco red grillcloth is supplied with the speakers, al-
though other colors may be substi-tuted. Inside, the system includes a10in. woofer and a 5in. dual -conemidrange/tweeter in a 223/4 in. x 11-3/4in. x I I in. enclosure. S20 price is$129.95. Scott.
Portable Phonograph 706Portable stereo phonograph withbuilt-in eight -track tape player
A portable stereo phonograph witha built-in eight track stereo tape car-tridge player is introduced. The modelCP500E features an eight -track stereotape deck with automatic program ad-
vance and manual program selector.The record changer, with diamondstylus, plays standard record sizes andspeeds. Also included is a 45 rpmspindle. The solid-state amplifying sys-tem produces 8w peak or 4w EIA mu-sic power output. Two 61/2 in. detach-able speakers, separate volume, bal-ance and tone controls are among thefeatures. The phonograph has a highimpact polystyrene brown cabinet withwalnut grained vinyl inlay. List priceis $159.95. Motorola.
Microphones 70760db output and 50-12,000 Hzfrequency range
"Mini -mike," a dynamic, omnidirec-tional microphone with a tailored fre-quency response over the entire speechrange is announced. The microphoneis designed for broadcast, recordingand public address applications. TheModel 35 is 3/4 in. in diameter, 3in. inlength with a high -low impedancecombination and a weight (less cable)of 41g. The model 35A is 21/4 in. inlength, 3/4 in. in diameter with a 15011impedance and a weight of 29g. Bothmodels reportedly feature a 60db out-put level and a 50-12,000Hz frequen-cy range. They are finished in desert
gold with a chromium grill. A 25ft.shielded cable, lavalier cord and cloth-ing clip are included with each micro-phone. The Model 35 has a list priceof $65; Model 35A, a list of $75.Conrac.
Speaker 708Wide range provides responsefrom 40 to 15,000 Hz
Announced is a portable, weather-resistant, Hi Fi speaker system. Desig-nated the 829A patio speaker, the sys-tem features the Model 755E 8in.,wide -range speaker claimed to provideresponse from 40 to 15,000Hz. The
58ELECTRONIC TECHNICIAN/DEALER
New WellerTEMPMATICTemperature Controlled Soldering Toolfor light and heavy duty soldering.
Now one tool combines all theadvantages of a lightweight pencil type iron,a fast heating soldering gun,and tip temperature control.
Features Weller'sexclusive newPOWERHEADThe heart of this new tool is itslong -life, high efficiency POWERHEAD... another great innovation from Weller.The POWERHEAD contains Weller'stemperature control system(which has been so successful in Wellertemperature controlled soldering irons).The result is maximum protection ofcomponents even in the most delicatework situations.
The integral points of thePOWERHEAD have made over 30,000 solderconnections in lab tests.
The points have a special premium platingwhich vastly extends life. And thePOWERHEAD completely eliminatesfiling and frequent tip changes asencountered with conventional
non -temperature controlled ools.
Two POWERHEADS are available:A 700°F. 3A6" chisel point POWERHEADor a 600°F. Ye" conical pointPOWERHEAD. A convenient ejectorbutton makes switching POWERHEADSeasy.
The entire tool weighs only 7 cunces.Its trigger turns heat on and off. And thestainless steel barrel has long reach.
Ideal for service, repairs, PC boards,models and hobbies. Order these newWeller TEMPMATIC models now.
JUNE 1969
WELLER ELECTRIC CORP., Easton, Pa. World leader in soldering tools. for more details circle 139 on postcard
59
uncernourishec
I-IARDIYIThis QUAM speaker isthinner and lighter thanmost, but there'snothing scrawny aboutits sound or emaciatedabout its performance.
It's one of 25 models in the Guamline that's being fed a special diet. . . an exclusive new high energymagnet material we call 0/8.
Q/8 provides more gap energyfor less weight, so a .65 ouncemagnet gives you the same per-formance as a full ounce of AlnicoV. Ideally suited to Quam's highdensity cup -pot structure, 0/8slims the speaker down in contouras well as weight-while deliveringfull, robust sound.
QM magnets are exclusively availabletoday on Quam speakers-part of ourongoing program of nourishing ourcustomers first with the finest.
QU-always theQuality Line,for everyspeaker need.
QUAM-NICHOLS COMPANY234 East Marquette RoadChicago, Illinois 60637
. . . for more details circle 127 on postcard
DEALER SHOWCASE
cocoa brown cabinet is molded ofhigh -impact -resistant Kydex. Achrome -plated stand is coupled to thecabinet using pivot bolts with knurledknobs to permit angular adjustmentof the cabinet for standing on theground or for wall mounting. Netprice is $71.50. Altec.
Tape Player 709Adaptable to auto or home
A line of "Cartable" eight -tracktape players is introduced. Six port-able models designed for easy transfer
between auto, boat and home covereach price bracket. The top -of -the -lineis the "Cartable 2800," a solid-state,woodgrain, eight -track stereo systemadaptable to auto or home. The unitfeatures four 51,5 in. speakers plus op-tional matching woodgrain speakersfor indoor installation. Belle Wood.
Phone Stylus Cleaner 710Consists of lint -free, treated pad
Introduced is a cleaner for the pho-nograph stylus. It features a lint -free,treated pad, and reportedly provides
easy mounting without causing dam-age to the stylus. Instructions indicatethat it can he used either on radial orelliptical styli. The cleaner comes in acase to keep it free of dust and dirt.71pa.
For more information onDEALER SHOWCASE
See page 83READERS SERVICE
TWO NEW
"plastic view"screwdriver kitsEASY TO USE, CARRY & STORE
These neat, extremely compact kits fit hippocket, tool box, boat kit, glove compartment. .can also be hung on a wall. Durable "PlasticView" zipper case permits instant identificationof tools.
Amber plastic (UL) Service Master handlesare shockproof, breakproof, have patented springholding device that accepts all Xcelite Series 99blades - lets you add tools as needed at mini-mum cost.
Space saving, single -ended interchangeableblades ... can be used with Xcelite extensionsfor extra reach.
99PV-6
Handle and 3 slotted screwdriverblades (3c6", 1/4", Ks" tips), 2 Phillips (#1, #2)
99PV-4
Handle and 3 slottedscrewdriver blades
(3f6", 1/4", K6" tips)
WRITE FOR CATALOG 166
XCELITE, INC., 14 Bank St., Orchard Park, N.Y. 14127In Canada contact Jos. St. Mars, Ltd.
... for more details circle 140 on postcard
ELECTRONIC TECHNICIAN/DEALER60
There'sa reward
ontheir heads.
RCA
FREE:The Copymate Dry Copier, with 20sheets of copymate paper, withyour purchase of the RCA WR-52AStereo FM Signal Simulator orWO -91C oscilloscope!
The WR-52A StereoFM Signal Simulatoronly $248.00*
The WO -91C 5 -InchDual Band OscilloscopeOnly $269.00'
Now you can own one of the fastest, most accuratetrouble-shooters in the East (West, North andSouth), and receive, absolutely free, the newall -electric Copymate!
Copymate is the portable dry copier that copiesanything -... checks, invoices, schematics, photos,your children's drawings and school work-without liquids, chemicals or sprays!
The Copymate, with paper, has a retail value of$31.94, but you can get it free ... Here's how.
Buy the WR-52A or WO -91C between April 15and July 15. Mail us your warranty card and theblue label on the outside of the carton no laterthan July 31st and we'll ship the Copymate to youat once, freight prepaid!
Good deal? You know it is.Mail your card and label to: RCA Elec'ronic
Components, Test Equipment Headquarters, Bldg.17-2, Harrison, N.J. 07029.
*Optional distributor resale price.. . . for more details circle 129 on postcard
JUNE 1969 61
sapajt- COLORFAX
ADMIRAL
Color TV Chassis G1 1/613/H10/H12/K15 Series-Weak or No Color
This problem can be caused by failure of disc capacitorC521 (.10f, 50v). Failure of this capacitor permits a nega-tive voltage to be produced at the plate (pin 9) of the colorkiller which will bias off the 2nd bandpass amplifier. Sub-
REPLACECAPAC TOR
.50, COW
S
1501
HO 1OM eor110
0.511
nomi,
Vt6GHEIApr,TOW IILLII
,,,,v5041 IV 46
---1
939111oel
raw
1/t6AF9 = 1/16GH8ANISTA" 3.511 0S5V503i 1111 35048
UV' I."1.3110_15 Aor
11110 3701 -1_itersT5Oil
ISM7 X11311.1/
L518 r370
NY ILT"_
5eto
stitute this capacitor to determine if it has failed. Measur-ing it with an ohmmeter may not reveal a defective capaci-tor. Replace with a .14 of higher working voltage such as64C53-98 (.I of, 200v) which is now used in production.
Color Convergence Magnets
The replacement parts pictured are available to replacethe nylon slider (magnet holder) used on the convergence
f1-4--7 IA 30-1
33C389-1
71A 30-1
assembly of earlier color TV models. Order the type shownin the drawing. The magnet (71A30-1) is not includedwith either type. The mounting clip shown with 33C389-1is included.
Color TV Chassis 611/613/H10/H12-Wrong Colors
If you encounter a complaint of chartreuse (yellowgreen) flesh colors which turn blue when the tint control isrotated, check the ECO transformer. Using the incorrecttransformer will cause the 3.58MHz to be applied to the
color demodulators 180deg out of phase. A keyed rainbowfrom a color bar generator will show the blue and redbars reversed. They will also roll toward or away from eachother when the tint control is rotated, instead of shiftingto one side together.
The correct ECO transformer for the G11, G13 andH12 series chassis is 72B285 -I. The correct transformer forthe H 10 series chassis is 72B285-2. Be sure you use thecorrect replacement-they look alike!
Color TV-Service HintSound But No Picture, Except Briefly When Set Is Turned Off
We have had several reports of this unusual conditionwhich is not actually a fault but it can generate a servicecall. If the brightness control is accidently used to try toturn the set off, the next time the customer turns it on withthe regular on -off switch, he will get sound but no picture.If he then turns the set off, the picture will come on brieflyand fade out. This causes him to think something is wrongwhen all he needs to do is turn the brightness up!
This condition occurs in models with the spot eliminatorcircuit. These models have an extra switch on the ON -OFFswitch which causes the picture tube to conduct at fullbrightness as the set is turned off. This drains off the highvoltage rapidly and prevents a lingering spot on the faceof the picture tube.
MAGNAVOXColor TV Chassis T924-Elimination of Afterglow on CRT Face
Afterglow on the face of a CRT used with a T924 chas-sis can be eliminated by lifting the ground end of resistorRI17, the 66M 6kv focus resistor and soldering it to point
2
viol
3A3 OR 3CU3HV RECT
7 M.V. SOURCE TOPICTURE TUBE
TiO2MV
TRANS
FOCUSCRIO
itsTIO3
FOCUS
:
TRAN
121
CHBISO6KV
N2200
RI IB
2.28852W
FOCUSVOLTAGESOURCE
R 117668856KV
FC PULSETO 78 ONCHROMA BD
TO DEFTea
PIN 5P
BOOST SOURCE
LIFT GROUND LEADCONNECT TO POINT7JJ ON CHROMA BD.
4.7 MEG
lw
LOW
8116
220K
BOOST
CH9.01WV
MYLAR
62 ELECTRONIC TECHNICIAN! DEALER
This little part playsa big role in radio.
This box gives you top revues.
The transistor is no bit playerwhen it comes to radio
performance. That's why Delcotransistors are manufactured
under controlled conditions thatassure high reliability. And
why they're thoroughly testedbefore being placed in the
familiar blue and black box.
Delco Radio engineers areleaders in auto radio design
and transistor technology.
Delco radios are originalequipment on over half
of the cars on the road.
That United Delco box is yourguarantee of genuine OEM
Delcc
GM
Transistor
IIDS -501
quality replacement parts. Andjust 12 Delco transistors replaceover 7,500 other types.
Doesn't it make good sense tostock the best?
Remember these facts when youre -order. And remember, too,that your United Delco supplierhandles the most recognizedname in the parts business.
Next time you think little,think big. Think Delco.
DELCO RADIO, Div. of General Motors, Kokomo. Ind.
GM United %0FDelcso
MARK Of EXCELLENCE
... for more details circle 113 on postcard
JUNE 196963
COLORFAX
711 on the chroma board. This can be most readily accom-plished by lifting the ground lead of RII7 from its groundconnection and moving the lead to one of the blank holeson the terminal board. Run the lead through the hole andbend it around the edge of the terminal board to minimizeits movement. Solder a length of hookup wire to the re-sistor lead and route the wire to point 7JJ on the chromaboard by the most convenient route. Solder it to this point.
Color TV Chassis T924-Modification of Color Test Fixture
Refer to Service Manual 7297, Sections 4.1 and 2. Thetest fixture yoke is wired as shown on the schematic forthe T924-03, 07 and 09 versions. These chassis are directly
Pin 7
Yoke Pin 11
Pin 9
DPDT
Pin 7
Pin 11
Pin 9
adaptable to the test fixture. However, the vertical yokewindings are connected internally in the T924 -0I, 02, 05,06, 08 and 10 versions. These versions will have no ver-tical sweep when used with the fixture. A DPDT switch,such as part No. 160370-5, can be inserted in the yoke ex-tension cable as shown to enable the fixture to he usedwith all T924 versions.
Color TV Chassis T933-Service HintsHorizontal Jitter, Low 6BK4 Current, Raster Size Change as
Brightness Control Setting Is Changed
Resistor It 173 (2M, 1/2w, 5%) in the grid circuit of the6JE6 horizontal output tube can cause horizontal jitter, low6BK4 current and changing raster size as the brightness
MJOlO "C" SS0402.Q007
"c8576*527. O.
11 Tr:029
-105500
11212016
22033900*525 S,.
C.Ir
050
111S31
000
41,07 V"'MOM OW
657
..v
0521 1104503 .115W
SPEC WM0% COIL
IIDV
C3 .530390
300aV f-4C529S OO
05311
27.IR
CS22. C523027 520520
1453415011
232
p$33 8537176A
0530
GOOV
4 RIOT MOB228
HORIZONTAL HOLD
Cell01
ii -
To 4.305vroHS
1100 2124100 22E6111V 5%.
ADD 100KIN SERIESWITH R173
i /a MEG
5%
58107
30 2100
control setting is changed, and when its value drops below1.9M. If the value is indicated as being near the low tol-erance limit and the ohmmeter is not known to be accurate,add a 100K resistor in series with RI73. Recheck the cir-cuit for elimination of the symptoms.
Minimum 6BK4 Current
With CRT BIAS and BRIGHTNESS controls set for a darkscreen (no CRT current) the 6BK4 current must be mini-mum of (ma. This current can he checked by measuring
Continued on page 67
The brand for all reasons
Every BSR McDonald automatic turntable isprecision made in Great Britain to themost exacting specifications. Upon theirarrival in the U.S., every model is unpackedand re -tested under actual playingconditions. That's why BSR service calls arethe lowest in the industry-and perhapsthat also explains why BSR sells moreturntables than anyone else in the world.
Mc DONALD
BSR McDONALD 600
i1 \
II Name
1
Address II
%City /State
% ,/
"S"BSR (USA) LTD.
BLAUVELT, N.Y. 10913Plerse send FREE detailed literature
on all BSR McDonald automatic turntables.
. . . for more details circle 106 on postcard
Did your mothertake you for
your last checkup?
What is it about grownups?Don't they know annualcheckups are the first line ofdefense against cancer? It'snice to find out you're ashealthy as you feel. See yourdoctor.You'll find peace ofmind beats lollipops any day!Help yourself with a checkup.And others with a check.American Cancer Society
TH111 SPACE CONTRIBUTED 137 THE PUBLISHER
ELECTRONIC TECHNICIAN !DEALER. for more details circle 141 on postcard -).
Engineeredfor outstanding reception
Zenith outdoor antennasfor Color TV!
The best color TV deserves the best antenna. And you canrecommend and install Zenith antennas with confidence.For every Zenith antenna is electronically engineered foroptimum reception in any signal area.
For outstanding performance, Zenith -engineered antennas include:
Capacitor coupled cap -electronic VHF dipoles. Tapered UHF grid driver. Staggered square UHF directors. Low -impedance, triple boom construction. Gold -color alodized coating (to help antennas look
better and last longer, with greater corrosionresistance and electrical conductivity).
Your Zenith Distributor has the complete line of Zenithquality -engineered TV antennas and antenna accessories.His staff has the technical experience and knowledge of yourarea to recommend the best antenna for any installation.
EXCITING SURPRISES FOR YOU-and Your Family!Get the details at your Zenith Distributor's Parts Department.Why not sell the best
The quality goes inbefore the name goes on
ELECTRONIC TECHNICIAN'S BOOK CLUB INVITES YOU AS PART OF TRIAL MEMBERSHIP TO
Take This Brand - New Book for only 99
yours for only 9with Trial Membership in
Electronic Technician's Book Club.
9c
KA ay we send you this unique new bookas part of an unusual offer of a Trial
Membership in Electronic Technician'sBook Club?
Now you can have, at your fingertips,this brand new, up-to-date 256 -page work-ing guidebook on all types of semiconduc-tors.
This handsome, hardbound book is in-dicative of the many other fine offeringsmade to Members . . . important books toread and keep ... volumes with your spe-cialized interests in mind.
How the Club Works
Forthcoming selections are described inthe FREE monthly Club News. Thus, youare among the first to know about, and toown if you desire, significant books. Youchoose only the main or alternate selectionyou wish (or advise if you want no bookat all) by means of a handy form enclosedwith the News. As part of your TrialMembership, you need purchase as few asfour books during the coming 12 months.You would probably buy at least this manyanyway . . . without the substantial sav-ings offered through Club Membership.
How You Profit From Club Membership
This is just a sample of the help andgenerous savings the Club offers you. Forhere is a Club devoted exclusively to seek-ing out only those titles of interest to youas an electronic technician. Membership inthe Club offers you several advantages:1. Charter Savings: Semiconductors FromA to Z carries a retail price of $7.95. Butit can be yours for only 990 with yourTrial Membership.
2. Continuous Savings: The Club guaran-tees to save you 15%, to 75,/, on all booksoffered through the Club News.
3. Wide Selection: Members are annuallyoffered well over 50 of the new and au-thoritative books on electronic servicing.
Limited Time Offer!
Here, then is an interesting opportu-nity to enroll on a trial basis ... to proveto yourself, in a short time, the advan-tages of belonging to Electronic Techni-cian's Book Club.
To start your Membership on these at-tractive terms, simply fill out and mail thePostpaid Trial Membership Coupon today.SEND NO MONEY! If you are not de-lighted with the book, return it within 10days and your Trial Membership will becancelled without cost or obligation. Wetake all the risk.
SEMICONDUCTORS FROM A TO Z contains all you need to know about the entire range oftransistors and semiconductors used today. Written in language anyone can understand, thisbook explains how various semiconductor devices work and how they are used, with completedescriptions of all the common and unique circuits used in modern technology. With the wealthof knowledge incorporated in this book, you'll be eminently qualified to service any type ofsolid-state equipment.
The content begins with a review of how basic semiconductors work, including types andfunction, how a transistor conveys a signal, transistor biasing and self -biasing techniques, effectsof temperature on operation, factors limiting transistor frequency response, etc. Succeedingchapters delve into the mystical arena of field-effect transistors by explaining the differencesbetween FETs and regular transistors. You'll understand junction FET applications, frequencyresponse, temperature effects, and the treatment given depletion -type and enhancement -typeMOS FETs in the most down-to-earth explanation you'll ever find.Considerable attention is given to integrated circuit applications variable -current and con-stant -current sources, unbalanced differential amplifiers. IC applications in FM and TV re-ceivers, TV sound circuits, discriminator circuits. and cascade amplifier networks. The use ofvaricaps is also covered, as well as unijunction transistors, field-effect diodes. zener diodes, SCRdiodes, 4 -layer diodes. diacs, and triacs. The final chapters deal with constant current and volt-age regulating systems and DC -to -AC -to -DC converters.
CONTENTS: What Is a Semiconductor? - Semiconductor Characteristics - Determining Semi-conductor Characteristics - Frequency Limitations - Field -Effect Transistors - MOS FETs - TheTunnel Diode - Tunnel Diode Applications - Integrated Circuits - IC Balanced Differential Am-plifier - IC Applications in FM Circuits - IC Applications in TV - IC TV Sound Circuits - ICTime Constants & Cascade Amplifiers - The Varicap - Varicap Applications - Review of Ca-pacitor & Coil Impedances - Photo -Sensitive and Photo -Emissive Devices - FET Light -SensitiveDevices - Principles of Optics - Optic -Electronic Couplers - Semiconductors for Power Supples- Constant -Voltage Transformer - Power Conversion - Filter A Regulators. Index.
r
BUSINESS REPLY MAILNo Postage Stamp Necessary If Mailed ;n The United States
Postage Will Be Paid By
ELECTRONIC TECHNICIAN'S BOOK CLUB
Monterey & Pinola Ave's.
Blue Ridge Summit, Pa. 17214
FIRST
CLASS
Permit No. 9Blue Ridge Summit, Pa.
DO NOT CUT HERE + JUST FOLD OVER, SEAL AND MAIL-NO STAMP OR ENVELOPE NECESSARY
Send No Money! Simply fill ill and mail Trial Membership Coupon Today!
ELECTRONIC TECHNICIAN'S BOOK CLUB, Blue Ridge Summit, Pa. 17214
Please open my Trial Membership in Electronic Technician's Book Club and send me a copyof Semiconductors From A to 1 I billing me only 99t' plus a few cents postage and mailingexpense 1. If not delighted, I may return the book within 10 days and owe nothing. Other-wise, to complete my Trial Membership. I agree to purchase at least four additional monthlyselections or alternates during the next 12 months. I have the right to cancel my member-ship anytime after purchasing these four books.
Name Phone No.
AddressNOTE: check if 0 home or 0 business address
City State ZipCompany
1-69
IThe Club assumes postage on all prepaid orders. Foreign and Canadian prices 10% higher.)
THIS ENTIRE FOLD -OVER COUPON FORMS A NO -POSTAGE -REQUIRED BUSINESS REPLY ENVELOPE
L
86ELECTRONIC TECHNICIAN/DEALER
COLORFAX
Continued from page 64the voltage across R 121, the 1K cathode resistor of the6BK4. This voltage must be a mininium of 1v (I=E/R).
Channel Eight Tweet Reduction
The following circuit modification is recommended forthe reduction of channel eight tweet.
(1) Install a 15K, 2w resistor between the junction ofR909 and R903 on the AFC board, and point VA(+270v)on the chroma board. This can be accomplished from theunderneath side of the boards and will require an extensionwire. (2) Remove and discard L905 and its extension lead.L905 is connected on the underneath side of AFC boardbetween the junction of R909 and C913 on the AFC boardand point YC(+140) on the chroma board. (3) Also re-move and discard R909 on the AFC board.
Once this circuit modification has been completed theplate/screen supply for V901 will be the 270v source.
WESTINGHOUSE
Color TV Chassis V8001-Demodulator Circuit
The demodulator system is a two stage circuit that con-sists of V7A called the R -Y demodulator and V6A calledthe B -Y demodulator, and their associated components.Both demodulators use 5GH8A tubes. Each demodulatorrequires two input signals. The two input signals are:
I. The output signal of V I2A, the bandpass amplifier.2. A 3.58MHz CW signal from V8A, the local oscillator.The output of the bandpass amplifier is passed to the
screen grids (G2) of the two demodulators.Two signals from the 3.58MHz local oscillator, differing
only in phase, are fed into G I, the control grids.The purpose of the demodulator is to convert the phase
3.58MHZosc
R 555 L 509
V6AB -Y
DEMOD
V7AR -Y OUTPUT
DEMOD
and amplitude differences of the two input signals into in-formation that the color difference amplifier circuit canenlarge to magnitudes necessary for driving the CRT grids.
At the transmitter during a color telecast only the intel-ligence contained in the red information signal and theblue information signal has to be transmitted for color re-production. Combining the R -Y and B -Y signals algebrai-cally and electronically in the receiver will result in the re-production of the green color. The R -Y and B -Y signals atthe transmitter are fed into separate modulators and main-tain a 90 degree phase relationship by the introduction ofa signal from an oscillator at the transmitter into the twomodulators that are 90 degrees apart in phase. In circuitryof receivers in the past the same relationship of 90 degreeswas maintained by introducing the 3.58 MHz signal of thereceiver's local oscillator into the R -Y and B -Y demodu-lators 90 degrees apart in phase.
OUTPUT
JUNE 1969
To service Color TV you need:
1. vectorscope
2. color bar generator
and you can't
use one withoutthe other!
One YearWarranty
portable
for homeor shop
only the V7 gives you both
The only complete one unit color vectorscope/color-bar gen-erator available anywhere!
Completely portable for servicing color TV in the home ... noneed to bring set to the shop!
The only one with detailed instructions on color circuit align-ment and color adjustment. And, additional instructions areavailable as new sets are introduced!
Recommended by leading TV manufacturers! Proven performance . .. over 4 years of use in field and shop
by thousands of technicians . . . no other vectorscope manu-facturer can make this claim!
V7 Checks and aligns demodulators to any angle. Checks and aligns bandpass-amplifier circuit. Pinpoints troubles to a specific color circuit.
Exclusive Features: Self-Calibrating-adjust timing circuit with-out external test equipment, Dial-A-Line-adjust horizontal lineto any width from 1 to 4. Plus: All Crosshatch, Dots, and ColorPatterns; Voltage Regulated; Fully Enclosed Cable Compartment.Free copy of Wayne Lemon's Book, "Color TV ServicingSimplified with Vectorscope Net 18950
Remember . . . V7 - the complete oneISee your utor or write Dept. ET -6
, INC.4529 North Kedzie Ave., Chicago, III. 60625
... for more details circle 121 on postcard67
NEW PRODUCTSFor additional information on products described in this section, circle thenumbers on Reader Service Card. Requests will be handled promptly.
3 -Way Signal Splitter 7 1 1
Provides three twinleadoutputs from single input
A 3 -way signal splitter capable ofmeeting the requirements of an 82channel TV antenna installation is in-troduced. The Model SS83 signal
splitter provides separate twinlead out-puts for UHF, VHF and FM from asingle 82 channel twinlead input. Vir-tually all TV sets require separate in-puts to their UHF and VHF antennaterminals. The splitter not only pro-vides two separate inputs from a singleall -channel antenna downlead, it alsoprovides an extra input to an FM orstereo FM receiver and makes it pos-sible for a single antenna to providesignal voltage to an all -channel TV setas well, without the need for a sepa-rate coupler. Splitting loss on the unitis negligible, reportedly less than 1db.Isolation between outputs is 18db andresponse is flat over the entire TV -FMspectrum ± 0.5db. It is equipped withno -strip terminals for the input andFM output. Twinlead is simply insert-ed under these terminals and thescrews are tightened down for positivemechanical and electrical connection.Appropriate lengths of twinlead withspade lugs are factory attached to theUHF and VHF TV output. The split -ter can easily be attached to the backof any TV set by means of an adhe-sive. List price is $4.95. JFD.
CB Base Antenna 712Shorter radials with 4dbomnidirectional gain
A half -wave, 4db gain, omnidirec-tional base station antenna is an-nounced. The model M-227 is thethird generation of the company'sMagnum series introduced in 1961.Over-all configuration of the antenna
is similar to previous versions but withmodifications in the loading static ar-rester assembly at the top of the five -section aluminum dipole and the ra-dials. The static arrester is a diamond -shaped double loop designed to im-prove static drain -off, reduce noiseand lower the radiation angle. The ra-dials are shorter than on previousmodels to make them more rugged.This is accomplished by four small
loading coils which electrically length-en the radials to a full 1/4 wavelengththus producing a low radiation angleand a claimed 4db of omnidirectionalgain. Other construction features in-clude a waterproof coax connectorjacket, chemically welded dual phas-ing coil jacket, and double -interlockdipole joints. The VSWR is rated at1.05 to 1 at centerband and 1.4 to 1
at the band edges. List price is $36.95.Antenna Specialists.
Solid -State VOM 713Battery -operated VOM featuresfield -effect -transistorized circuitry
Introduced is a battery -operatedvolt-ohm-milliammeter featuring afield-effect circuit with a IOM constantinput resistance on all dc voltageranges and sensitivity approximatelyten times greater than the convention-al bench -type VTVM. The unit, whichslips easily into a shirt pocket, is 23/4x 41/4 x 11/3 in. and weighs 14oz. It hasa thumb switch on the side for revers-ing polarity, a single test/range selec-tor switch on the front panel and pro-vision for attaching an ac clamp -onammeter adapter. Adding to its ease -
of -use in the field, the VOM has a bat-tery -test provision as one of the selec-tor -switch positions. The VOM report-edly performs with an accuracy of 3
percent on all dc ranges, 4 percent onall ac ranges and 3 percent on ohms.Available ranges in dc volts are: .3,1.2, 6, 30, 120 and 600v with an inputresistance of IOM constant on allranges. In the ac position, the unitcovers 3, 12, 60, 300 and 600v (forgreater accuracy, a separate scale isprovided for 0-3v), with input resist-ance of 500012 per volt. DB measure-ments are .1 to 600v and dc currentmeasurements in two ranges, 0-120 pa,and 0-1/2 iza at 300mv. Four resistancemeasurement ranges are available (allread on the 5012 center scale): X 1,X100, X 10K, and times 1M so thatresistances from 10 to 5000M can beconveniently measured. The VOMutilizes two batteries, a 7v type NEDA1501 to power the FET bridge circuit,and a 11/2v ASA type N for the ohmscircuit. Net price complete with probesand insulated leads is $70. Triplett.
For more information
on these
NEW PRODUCTS
See page 83
READERS SERVICE
88 ELECTRONIC TECHNICIAN' DEALER
DARCY."Coniinued from page 55
back to the 10vdc range. Theunit was used to measure cri-tical circuits such as the syncand oscillator sections whichcontinued to operate normal-ly proving the absence of cir-cuit loading.
Measurements on the otherranges for ac, ohms and ampsalso proved to be fast and ac-curate.
Since digital test instrumentsare just now really getting in-to the pricing category of thesmall shop, we were concern-ed with the warranty and re-pair situation. The manual thatcame with the DM330 we re-ceived was not up to date, ac-cording to the people represent-ing Darcy, when we contact-ed them about it. They indica-ted that a new warranty wasbeing printed which better ex-plains their program. In essenceit says that Darcy provides re-gional repair centers. The DM330is warranted for one year andcan be sent to the closest repaircenter. However, the manualis purposely complete enoughto allow the technician to repairthe DM330 in his own shop ifhe wiF'Ies. But like a fine watch,once toe owner opens the unitfor repair, the warranty is void-ed. If the technician wants torepair it, he can order parts fromthe factory but again, the partswill not be covered under war-ranty unless the unit is repair-ed by an authorized repair cen-ter. Darcy has repair centersin the East and Midwest regions.The factory handles the West-ern region.
As we mentioned earlier, digi-tal test instruments are gettingcloser to the price a technicianand service shop can afford.The service business today ismore demanding and time ismore valuable so test instru-ments become a most impor-tant asset. Because of this, wewill continue in future Testlabreports to bring you the latestdesigns in test instruments.
Next month's Testlab willreview the Seco 88A tube tester,Sencore Model SM152 sweep andmarker generator.
STANDARDSIGNALS OF APROFESSION
vec . N..for ArI
With just aflick of aswitch-you get
eitherwaveform
on the
Standard!Video waveforms of a
ality broad bandscope
0
SENCORE PS148 CombinationBroad Band Scope and VectorscopeThe Sencore PS148 is the only scope on the market that takes youall the way. It is sensitive enough to view the small signals fromthe TV tuner but broad band enough, without time-consuming bandswitching, to hold any video or color waveform steady as a rock.it's almost impossible to knock out of sync,and waveform presentationis so near textbook exhibits that you'll have no difficulty in identifyingcircuit trouble. Exclusive direct readout of peak to peak voltagesmakes work even faster. That's not all . . . flip two slide switcheson the rear and you have a complete and modern vectorscope. Rearplate instructions and detailed instructions how to read and interpretvectors insures you of a job made easy. See your Sencore dis-tributor today . . . he has the PS148 in stock. $229.50
CD 1=1NO. I MANUFACTURER OF ELECTRONIC MAINTENANCE EQUIPMENT426 SOUTH WESTGATE DRIVE. ADDISON. ILLINOIS 60101
... for more details circle 131 on postcard
69JUNE 1969
NEWS
OF THE INDUSTRY
Sylvania Plans Introduction ofThree Color CRTs in 1970
The Electronic Tube Div. of Sylvania Electric Products,Inc. has revealed plans for the introduction of three newcolor television tube types in 1970, including the indus-try's largest tube and the first 110deg. color tube. Syl-vania is a subsidiary of General Telephone & ElectronicsCorp.
George Konkol, vice president -operations, said the newtubes will consist of a new large screen, 25in. viewable90deg. square corner; a 21 in. viewable 90deg. square cor-ner tube, and an 18in. viewable 110deg. tube.
Preliminary drawings for these tubes will be distributedto manufacturers of color television sets this month. Pro-duction schedules for the new tubes are predicated entirelyon the availability of the new glass sizes and shapes re-quired, Konkol said. However, plans call for the 25 and21in. tubes to be sampled in January 1970.
Konkol said the square corner feature of the 25 and 21in. tubes will provide a flatter and more pleasing appear-ance than current tubes.
Admiral ReportsProfit in 1968
Admiral Corp. reported 1968 earnings after taxes of$494,430 or 10 cents a share, compared with a loss of$3,770,061 or 74 cents per share in 1967. Profits before
taxes were $894,430 in 1968, while in the preceding yearthere was a loss of $7,707,061. The electronics -appliancemanufacturer said consolidated sales were $377,013,813 in1968, which compares with $380,941,526 in 1967.
Fourth quarter sales were $96,071,068, contrasted with$108,230,891 in 1967. The drop in volume was attributedto a later -than -usual introduction of appliances-Decemberagainst August-which prevented sizable shipments in thefourth quarter, lower sales by the government electronicsdivision, and changeover to the new 4-4-5 weeks per quar-ter accounting periods ending on the Sunday nearest Dec.31.
Profits before taxes in the quarter were $1,891,707against a profit of $1,505,315 in 1967. Net profits were$781,306 or 16 cents per share, compared with $622,266or 12 cents per share.
EIA Reports FM Radio Growth UpConstituting 37.1 Percent of Radios
The FM share of the radio market continued to grow in1968, registering increases and new highs in all categories,according to the Electronic Industries Assn. ConsumerProducts Div. and based on EIA Marketing Services Dept.statistics.
FM radios constituted 37.1 percent of domestic -labelradios (table, clock, portable) in 1968, compared to 33.5percent in 1967. In numbers, FM radios grew from 4.21million table, clock and portable units in 1967 to 4,322,000units in a total domestic -label radio market that decreasedfrom 12.6 million units in the previous year to 11.7 millionin 1968. These statistics are increased to 47 percent and42.3 percent, respectively, for 1968 compared to 1967when TV and phonograph combinations are included.
Measured in dollars, however, FM accounted for 56.4
Zenith "Royal Crest"Tubes...with unrivaled dependabilityZenith "Royal Crest" replacement circuit tubes areengineered to the same exacting standards asoriginal Zenith circuit tubes in new sets. With thesame unrivaled dependability and "new set"performance.
Zenith "Royal Crest" circuit tubes arelife -tested under actual operating conditionsfor more than 1,500,000 hours every month!
The "Royal Crest" line is broad andcomprehensive. Over 900 different types, all builtto Zenith rigid quality standards.
Insist on Zenith quality. Choose Zenith's "RoyalCrest" circuit tubes and assure customer satisfaction.
EXCITING SURPRISES FOR YOU-and your family!Get the details at your Zenith Distributor's Parts Department.
Why not sell the best ArsirmThe quality goes in
before the name goes on
.".41V.0472.1
41ApE
s
f ( 1
70
. . . for more details circle 142 on postcard
ELECTRONIC TECHNICIAN /DEALER
percent of the factory value of all domestic -label table,clock and portable radios in 1968 compared to 55 percentin 1967. Table, clock and portable units all registered in-creased percentages in FM saturation, while portablesshowed a decrease in dollar sales. The average value of anFM home radio decreased from $26.55 in 1967 to $24.92in 1968.
NEA'S Certified Electronic TechnicianProgram Now International
In March and April of this year NEA's certificationcommittee issued certificates to electronic technicians inseveral countries outside the United States, includingGuam, Canada, South Vietnam, Argentina and Germany.Other technicians are attempting to qualify in Brazil, Spain,Puerto Rico and Mexico.
To become registered by NEA as a CET, a technicianmust successfully complete a 126 -question technical testoffered by NEA's CET committee. He must have com-pleted four years of schooling and experience in consumerelectronics service. Successful passage of the test entitleshim to a framed wall certificate, a wallet identification cardand the use of CET following his name.
Presently, the Raytheon Co. Tube Div. is presentingCETs with lapel pins. Also, in the coming months the CETcommittee is offering CET patches for use on blazers whichmany of the professional technicians now wear.
Dick Glass, CET, president of NEA, stated that "TheCET Program has reached the point where it is now rec-ognized by the entire industry. It has registered close to800 CETs."
Technicians may take the CET test in various locations.In California, New York and Pennsylvania the majority oftests are given in two-hour sessions at association meetings.Military service personnel have their tests monitored bybase education officers. Several vocational schools andsome radio stations have been used as test monitors. InNebraska, five area vocational colleges hold test sessionsregularly each month in various places in the state.
International Correspondence Schools, Scranton, Pa.,has been grading the CET test papers. Due to increased vol-ume, however, the CET Committee has designed new testsfor computer grading to speed up the program.
Sony Produces Braille ManualsFor Tape Recorders
Superscope Inc., exclusive U.S. distributor of Sony taperecorders and related equipment, has started producingbraille instruction manuals for three tape recorders. Themanuals will be available free upon request.
"With the increasing use of tape recorders by the blindas one of their primary sources of education, entertainmentand relaxation, we believe that these people should havethe dignity of self-sufficiency in being able to operate andcare for their recorders without help," the firm said.
The 10- by 12in. instruction manuals will be for theSony models 100, 104 and 105 tape recorders that aremost frequently used by the blind because of their sim-plicity of operation. They will be produced by Boston -based National Braille Press, Inc.
The entire braille alphabet can be printed from a com-bination of six dots. A special stereotype machine punchesthe dots onto a thin 9- by 28in. zinc printing plate. Afterthe plates are proofed (by a blind person), they are runon an inkless cylinder press which prints four pages to asheet at the rate of 3000 copies an hour.
"To the best of our knowledge, no other tape recordercompany provides this service," the company noted.
NEW Heathkit Solid -StateColor Bar- Dot Generator
Kit IG-28Only $79.95*
Advanced Integrated CircuitryDelivers 12 Patterns PlusClear Raster ... No DividerChain Adjustment ... NoFlicker, Bounce or Jitter
All solid-state construction using Integrated Cir-cuitry No divider chain adjustments Stablepattern display - no flicker, bounce or jitter Produces 12 patterns plus clear raster Instantswitch selection of all functions Exclusive 3x3display plus standard 9x9 display of all patterns Horizontal lines only one raster thick for addedaccuracy Variable front panel tuning for channels2 through 6 Variable positive andnegative video output Front panel negative goingsync output Two handy AC outlets on front panel Built-in gun shorting circuit with lead piercingconnectors Front panel switchable crystal con-trolled sound carrier Copper -banded transformerto reduce stray fields Safe three -wire line cord Fast, easy construction with two circuit boards andtwo wiring harnesses
Advanced Design. The new Heathkit IG-28 isone of the most stable, versatile Color and B&WTV service instruments available. In addition tothe exclusive Heath "3 x 3" display of patternsillustrated, it also produces the familiar 9 x 9displays . . . plus a clear raster for adjustingpurity without upsetting the AGC. Fifteen J -KFlip -Flops count down from a crystal controlledoscillator to eliminate divider chain instabilityand adjustment.
Time -Saving Versatility . . . gives you frontpanel tuning for channels 2 thru 6 ... front panelvariable plus and minus video output . . . frontpanel sync output ... two convenient AC outlets. . . built-in gun shorting circuits and grid jacks. . . vectorscope capability . . . crystal controlledsound carrier . . . banded transformer to elimi-nate stray fields ... zener-regulated power supply... safe three -wire line cord ... fast circuit board -wiring harness assembly_ For the versatility youcouldn't get before . . . put the new IG-28 onyour bench now.
Kit IG-28, 8 lbs $79.95'
r HEATH COMPANY, Dept. 24-6Benton Harbor, Michigan 49h22
L
vamp
Standard9x9 Displays
plusExclusive
Heath"3 x 3" Displayr
3x3 Dot
3x3 Cross Hatch
1
3x3 Shading
3x3 Color Bars
I
3x3 Vertical
r
3x3 Horizontal
Please send my FREE 1959 Heathkit Catalog.
] Enclosed is $ plus shipping.
Please send model (s)
Name
Address
City State ZipPrices & specifications subject to change without notice.
*Nail order prices; F.O.B. factory. TE-200
JUNE 1989
... for more details circle 116 on postcard
71
1969 DIRECTORY
ELECTRONICTECHNICIAN / DEALER
A
AC Electronics Div. GMC, 1925 E.Kenilworth, Milwaukee, Wis. 53202
ATR Electronics, 300 E. 4th St.,St. Paul, Minn. 55101
Acme Electric Corp., 31 Water St.,Cuba, N.Y. 14727
Acme Lite Products Co.,Congers, N.Y. 10920
Acoustic Research, 24 Thorndike St.,Cambridge, Mass. 02138
Acro Products, 369 Shurs Lane,Philadelphia, Pa. 19127
ADC, Inc., 2833 13th Ave. S.,Minneapolis, Minn. 55407
Adler TV Specialties, PO Box 2005,Atlantic City, N.J. 08406
Admiral Corp., 903 Morrissey Drive,Box 845, Bloomington, III. 61701
Advance Relay, 2435 N. Naomi St.,Burbank, Calif. 91504
Aerovox Corp., 740 Belleville Ave.,New Bedford, Mass. 02745
Akro-Mills, 820 Market St., Akron, OhioAlco Electronic Products, Inc., PO Box
1346, Lawrence, Mass. 01843Allen-Bradley, 136 W. Greenfield Ave.,
Milwaukee, Wis. 53204Alliance Mfg. Co., Alliance, Ohio 44601Allied Radio, 100 N. Western Ave.,
Chicago, Illinois 60680Almo Industrial Electronics, Inc.,
412 N. 6th St., Philadelphia, Pa. 19123Alpha Wire Corp., 180 Varick St.,
New York, N.Y. 10013Altec-Lansing, 1515 S. Manchester,
Anaheim, Calif. 92802American Concertone, 9449 W. Jefferson
Blvd., Culver City, Calif. 90230American Electronic Labs., Inc.,
Colmar, Pa. 18915American Geloso Electronics, 251 Park
Ave., New York, N.Y. 10010American Microphone Div., see Electro
Voice
American Telephone & Telegraph,195 Bdwy, New York, N.Y. 10007
American Trading Co., Blaustine Bldg.,Baltimore, Md. 21201
Amp, Inc., 3822 Eisenhower Blvd.,Harrisburg, Pa. 17111
Amperex Electronic, 230 Duffy Ave.,Hicksville, L.I., N.Y. 11802
Ampex Audio, Inc., 934 Charter St.,Redwood City, Calif. 94063
Ampex Corp., 25564 Willow Pond Lane,Los Altos Hills, Calif. 94022
Amphenol Distributor Div., 2875 S.25th Ave., Broadview, III. 60153
Amprobe Instrument, 630 Merrick Rd.,Lynbrook, N.Y. 11563
Analab Instrument, 30 Canfield Rd.,Cedar Grove, N.J. 07009
Anasphone Corp., 10912 La CienegaBlvd., Inglewood, Calif. 90304
Andrea Radio, 27-01 Bridge Plaza N.,Long Island City, N.Y. 11101
Antennacraft, 1215 Agency St.,Burlington, Iowa 52601
Antenna Designs, Inc., 802 WashingtonSt., Burlington, Iowa 52601
Antenna Products Co., Box 110,Mineral Wells, Tex. 76067
Antenna Specialists, 12435 Euclid Ave.,Cleveland, Ohio 44115
Antronic Corp., 4942 W. Div. St.,Chicago, III. 60651
Arco Electronics, Community Dr.,Great Neck, N.Y. 11021
Arcturus Electronics, 420 Kearny Ave.,Kearny, N.Y. 07032
Argos Products, 600 S. Sycamore,Genoa, III. 60135
Arkay Intl, 88-06 Van Wyck Expressway,Richmond Hill, N.Y. 11418
Armco Steel Corp., 703 Curtis St.,Middletown, Ohio 45042
Arrow Fastener Co., 201 Mayhill St.,Saddle Brook, N.J. 07662
Arrow -Hart & Hegerman, 103 HawthornSt., Hartford, Conn. 06105
Artisan Organs, 2475 N. Lake Ave.,Altadena, Calif. 91001
Arvin Industries, Columbus, Ind. 47201Astatic Corp., Jackson & Harbor Sts.,
Conneaut, Ohio 44030Astron Corp., 255 Grant Ave. E.,
Newark, N.J.
Atlas Sound Corp., 10 Pomeroy Rd.,Parsippany, N.J. 07054
Audax, Inc., 109-01 37th Ave.,Corona, N.Y. 11368
Audio Devices, 444 Madison Ave.,New York, N.Y. 10022
Audio Dynamics, 1677 Cody Ave.,Ridgewood, N.J.
Audio Empire Div. Dyna Empire, 1075Steward Ave., Garden City, L.I.,N.Y. 11530
Audio Corp., 514 Bdwy.,
New York, N.Y. 10012Audio -Master Corp., 17 E. 45th St.,
New York, N.Y. 10017Audio Wave, Inc., 4541 Furman Ave.,
Bronx, N.Y. 10470Audiotex Mfg., 400 S. Wyman St.,
Rockford, Ill. 61101Audiotex Mfg., 3225 Exposition Pl.,
Los Angeles, Calif. 90018Auricord Corp., 34-43 56th St.,
Woodside, N.Y. 11377Automatic Electric Co.,
Northlake, III. 60164
B
B & B Electronic Products, 2120 S. PlatteRiver Dr., Denver, Colo. 80223
B & K Instruments (Bruel & Kjaer),3006 W. 106 St., Cleveland, Ohio 44111
B&K Mfg. Co., 1801 W. Belle Plaine,Chicago, III. 60613
BSR (Birmingham Sound Reproducers),Ltd., College Point, L.I., N.Y. 11356
Ballantine Labs, Boonton, N.J. 07005Barber -Colman Co., Rockford, Ill.Barker & Williamson, Bristol, Pa. 19007Barry Electronics, 512 Bdwy.,
New York, N.Y. 10012Bauchaine Sales Corp., 584 Union Ave.,
Laconia, N.H. 03246Beckman Instruments Berkeley Div., 220
Wright Ave., Richmond, Calif. 94804Belden Corp., 415 S. Kilpatrick,
Chicago, III. 60644Bell & Howell, 7100 McCormick Rd.,
Chicago, Ill.Bell PA Products, 1209 N. 5th St.,
Columbus, Ohio 43212Bell Telephone Labs, 463 West St.,
New York, N.Y. 10014Benco TV Assoc., 27 Taber Rd.,
Rexdale, Ont., CanadaBendix Radio Div., Industrial Electronic
Prods., Baltimore, Md.Berns Mfg., 9853 Chalmers,
Detroit, Mich. 48213Bird Electronics Corp., 30303 Aurora Rd.,
Solon, Ohio 44139Birnbach Radio, 435 Hudson,
New York, N.Y. 10014Bliley Electric, Union Station Bldg.,
Erie, Pa.Blonder -Tongue Labs, 9 Ailing St.,
Newark, N.J. 07102Bogen -Presto, PO Box 500,
72 ELECTRONIC TECHNICIAN/DEALER
Paramus, N.J. 07652Boonton Radio, Boonton, N.J. 07005Bosco Elec., Inc., Don Littell Rd.,
Hanover, N.J. 07936Bourns Labs, Box 2112,
Riverside, Calif. 92506Bozak Co., Rt. Box 1166,
Darien, Conn. 06820Brach Mfg. Corp., 899 Main,
Sayreville, N.J. 08872Bright Star, Ind., Clifton, N.J.British Ind., Port Washington, L.I.,
N.Y. 11050
Browning Labs, 100 Union Ave.,Laconia, N.H. 03246
Brush Instruments, 37 St. & Perkins,Cleveland, Ohio
BSR (USA), Ltd., Route 303,Blauvelt, N.Y. 10913
Bud Radio, 4605 E. 355 St.,Willoughby, Ohio 44094
Burgess Battery, Exchange St.,Freeport, III. 61032
Burroughs Corp., 6072 2nd Ave.,Detroit, Michigan 48202
Bussman Mfg., W. University St.,St. Louis, Mo. 63107
C
Cabinart, Inc., 35 Geyer St., Haledon, N.J.Cadre Ind., Box 150, Endicott, N.Y. 13760Calbest Electronics, 4801 Exposition
Bldg., Los Angeles, Calif.Cannon Electric, 3208 Humboldt St.,
Los Angeles, Calif. 90031Castle TV Tuner Service, 5710 N. Western
Ave., Chicago, Ill. 60645Castle TV Tuner Service, 41-92 Vernon,
Long Island City, N.Y. 13476Centralab, 900 E. Keefe Ave.,
Milwaukee, Wis. 53212Channellock, Inc., S. Main St.,
Meadville, Pa. 16335Channel Master Corp.,
Ellenville, N.Y. 12428Charles Engineering, Inc., 3421 N. Kroll
Dr., Los Angeles, Calif.Chem Spray Corp., 67-27 Cadillac St.,
Houston, Tex. 77021Chemical Electronic Engineering, Jackson
& Ravine Dr., Matawan, N.J. 07747Chemtronics, Inc., 1260 Ralph,
Brooklyn, N.Y. 11236Cinch Jones Div., Cinch Mfg.,
1026 Homan Ave., Chicago, III.Cisin Co., Harry G.,
Amagansett, N.Y. 11930Clairex Corp., 19 W. 26th St.,
New York, N.Y. 10010Clarostat Mfg., Dover, N.H. 03820Clear Beam Antenna Corp., 9754 Deering
St., Chatsworth, Calif. 91311Cletron, Inc., 1974 E. 61 St.,
Cleveland, Ohio 44103Cleveland Institute of Electronics, 1776
E. 17th St., Cleveland, Ohio 44114Cohu Electronics Massa Div.,
5725 Kearney Villa Rd.,San Diego, Calif. 92123
Coe Inst. Div., 2034 Placenta,Costa Mesa, Calif.
Colman Tool & Electric Products,PO Box 2965, Amarillo, Tex. 79105
Colson Corp., 395 LaSalle,Chicago, III. 60603
Colorgrams, Inc., 58 Old Steward Ave.,New Hyde Park, L.I., N.Y. 11040
Columbia Products Co., Rt. 3,Columbia, S.C. 29206
Columbia Wire & Supply Co., 2850 Irving
Park Rd., Chicago, III. 60618Commander, 133 North Jefferson,
Chicago, III. 60606Communications Co., 300 Greco Ave.,
Coral Gables, Fla. 33146
Communications Electronics, PO Box1272, Scottsdale, Ariz. 85252
Communications Prod. Co., Rt. 79,Marlboro, N.J. 07746
Components Specialties, Inc., 101 BuffaloAve., Freeport, N.Y. 11520
Conar Instrument, 3939 Wisconsin Ave.,Washington, D.C. 20016
Conrac, Inc., 19217 Foothill Blvd.,Glendora, Calif. 91740
ANNOUNCING SPACE AGE
FOAMING ACTION
0
e-7-_
0
P -7.N
CLEANS, POLISHES,& LUBRICATES CONTACTSEACH TIME CHANNELIS CHANGED
SPACE AGELUBRICANT
DOESN'T DRY OUTFOAMS AWAY
DIRT AND CORROSIONTUN -O -FOAM is a new generation of
tuner sprays. It is not simply a cleanerwith a little residue of lubricant. It is a
space age lubricant that cleans as it lubricates.Ordinal lubricants are hydrocarbon compounds
which dry out rapidly. TUN -0 -FOAM is a spaceage lubricant in which the carbon has been
replaced by a rugged, synthetic element. The resultis a long lasting lubricant capable of withstanding
extremes of temperature and maintaining lubricity overthousands of channel changes. Thus, no matter how
hot the chassis runs, TUN -O -FOAM will not cake upor dry out. Especially well suited to silver and gold
plated contacts, it is the same type of lubricant used intoday's spacecraft - the finest ingredients ever put into a can.
Each time the tuner is rotated, the contacts are cleaned,polished and Itbricated. Yet TUN -0 -FOAM is non-abrasive.
t will not wear away co and it cannot cause d
TRY TUN -O -FOAM. IT'S 0 B INERLUBRICANT/CLEANER YOU'VE EVER USED OR YOUR MONEY REFUNDED
-4111(417-tikii;1260 RALPHRALPH AVENO BROOKLYN, N.Y. 11236
FOR EXPORT: ROBURN AGENCIES INC., NEW YORK, N.Y. 10013IN CANADA: PERFECT MANUFACTURING LTD., MONTREAL 9, CANADA
JUNE 1969
Continental Electronics, 1050 N. CentralExpressway, Dallas, Texas 75201
Courier Communications, Inc., 56Hamilton Ave., White Plains, N.Y. 10601
Cornell-Dubilier Electronics, 50 Paris St.,Newark, N.J. 07105
Creative Products, Inc., 8120 Blue AshRd., Cincinnati, Ohio 45236
Crescent Enterprises, 7301 Mission Rd.,Prairie Village, Kan. 66208
Crown Intl, Box 261, Elkart, Ind. 46514CRT Equipment Co., Inc., 2740 Old
Lebanon Rd., Nashville, Tenn. 37214Cush Craft, 621 Hayward St.,
Manchester, N.H. 03103
Cutler -Hammer, 436 N. 12th St.,Milwaukee, Wis. 53233
D
Dale Electronics, 1378 28th Ave.,Columbus, Neb. 68601
Davies Molding Co., Harry, 1428 N. WellsSt., Chicago, III. 60610
Darcy Industries, 1723 Cloverfield Blvd.,Santa Monica, Calif. 49104
Daystrom, Inc., Archbald, Pa. 18403DeJur-Amsco, 45-01 Northern Blvd.,
Long Island City, N.Y. 11101Delco Radio Div., GMC,
Kokomo, Ind. 46901
B&K has done it again! We've madethe ins and outs of transistor analysisthe fastest, most streamlined open.ations ever.
Now, for the first time, you can accu-rately check both bi-polar and FETtransistors in -circuit or out -of -circuit.using the same simple testing pro-cedure. It's like having an entire elec-tronics laboratory in one compactpackage!
The Model 162 checks DC Beta from1 to 5,000! Gm readings to 50,000umhos. It checks FET's for Gm, Icss,and I oss leakage. And tests gates 1and 2 separately. Regular transistorsare checked for Beta gain, I CBO, ICESand IcEo leakage. Unique DC injectionprovides more accurate in -circuit testsin low -impedance circuits. A flick ofthe switch tells you if an unknown
New Silent Partner Model 162FET Transistor Analyst...FastestMethod of Checking TransistorsIn-Circuit/Out-Of-Circuit.transistor is NPN or PNP type. Specialsafety circuits protect the Model 162from internal damage even if wrongsettings or leads are used.All this comes complete with a con-cealed -handle compartment with stor-age and protection for test leads. Aflip -top, programmed guide speedsand simplifies testing with B&K's ex-clusive step-by-step instructions.Why not contact your nearest B&Kdistributor for complete details onhow the 162 can show you the ins andouts of transistor servicing. In timeand work saved, the Silent PartnerModel 162 will be a real profit booster!FET Transistor AnalystModel =162. Net: $99.95.
Product of Dynascan Corporation1801 W. Belle PlaineChicago, Illinois 60613
B&K puts an end to test equipment.We've developed Silent Partners.
. . . for more details circle 105 on postcard
Delmonico Intl, 120-20 Roosevelt,Corona, III.
DeWald Radio, 35-15 37th Ave.,Long Island City, N.Y. 11103
Dialight Corp., 60 Steward Ave.,Brooklyn, N.Y. 11237
Diamond Tool, 4602 Grand Ave., W.,Duluth, Minn. 55807
Dickey, Inc., D. F., 4863 Rivoli Dr.,Macon, Ga. 31204
Drake Mfg., 4826 N. Olcott,Chicago, III. 60656
DuKane Corp., St. Charles, III. 60174DuMont Labs, Allen B., 750 Bloomfield,
Clifton, N.J. 14431Du Pont de Nemours,
Wilmington, Del. 19801Doutone Co., Locust St.,
Keyport, N.J. 07735Dutch Brand Div., Johns -Manville, 78 S.
Woodlawn Ave., Chicago, III.Dymo Ind., 2725 10th St.,
Berkeley, Calif. 94710Dynaco, Inc., 3912 Powelton Ave.,
Philadelphia, Pa. 19104Dyna-Empire, 1075 Steward Ave.,
Garden City, L.I., N.Y. 11530
E
ECI Electronics Communications, 56Hamilton Ave., Mount Vernon, N.Y. 10552
ELPA Ind., Ortofon Div.,New Hyde Park, Ill.
E -Z Hook Products, 1536 Woodborn Ave.,Covington, Ky.
E -Z Way Towers, Inc., PO Box 5797,Tampa, Fla. 33605
Eby Sales, 148-05 Archer Ave.,Jamaica, L.I., N.Y. 11435
Eitel-McCullough, 301 Industrial Way,San Carlos, Calif. 94070
Eico Corp., M St., below Erie,Philadelphia, Pa.
Eico Electronic Instrument Co.,283 Malta St., Brooklyn, N.Y. 11207
Electric Auto Lite, 3529 24th St.,Port Huron, Mich. 48060
Electric Storage Battery, 1717 E. 9th St.,Cleveland, Ohio 44114
Electro Acoustic Prods., 2135 Beuter Rd.,Fort Wayne, Ind.
Electro Products Labs, 6125 W. HowardSt., Chicago, III. 60648
Electro-Voice, Inc., 663 Cecil St.,Buchanan, Mich. 49107
Electronic Chemical Corp., 813 Communi-paw Ave., Jersey City, N.J. 07304
Electronic Communications, Inc., 56Hamilton Ave., White Plains, N.Y. 10601
Electronic Measurements, Lewis St. &Maple Ave., Eatontown, N.J. 07724
Electronic -Missiles & Communications,Inc., 262 3rd St., Mount Vernon, N.Y.
Electronic Organ Arts, 4949 York Blvd.,Los Angeles, Calif. 90042
Electronic Prods. Div., Victoreen
74 ELECTRONIC TECHNICIAN/DEALER
Instrument, 111 E. 3rd St.Mount Vernon, N.Y. 10550
Electronic Publishing, 133 N. JeffersonSt., Chicago, III. 60606
Electronic Technician/Dealer, HarbraceBldg., Duluth, Minn. 55802
Electrovert, Inc., 86 Hartford Ave.,Mount Vernon, N.Y. 10553
Electro-Voice, Inc., 663 Cecil St.,Buchanan, Mich. 49107
Elgin Advance Relays, 2435 W. Naomi St.,Burbank, Calif.
Elpha Marketing, Thorens Building,New Hyde Park, N.Y. 11040
Eltec, 14 Alsop Ave.,Middletown, Conn. 06457
EMC, 625 Bdwy., New York, N.Y. 10012Emerson Radio & Phono, 14 & Coles,
Jersey City, N.J. 07302Empire Scientific, 1075 Steward Ave.,
Garden City, L.I., N.Y. 11530Enterprise Development Corp., 5123 E.
65th, Indianapolis, Ind. 46220Entron, 2141 Industrial Pkwy.,
Silver Spring, Md. 20904Ercona Corp., 16 W. 46 St.,
New York, N.Y. 10036Essex Wire, 1601 Wall St.,
Indianapolis, Ind.Euphonics Corp., PO Box 2746 Rio
Piedras, Puerto Rico, USA 00926Eveready Batteries, see Union Carbide Co.Exide Ind. Div., Electric Storage Battery,
52 S. 15 St., Philadelphia, Pa. 19102.
F
Fanon-Masco, 439 Frelinghuysen Ave.,Newark, N.J. 07114
Fidelitone, Inc., 6415 Ravenswood Ave.,Chicago, III. 60626
Finney Co., 34 W. Interstate St.,Bedford, Ohio 44146
Fischer Special Mfg. Co., 446 Morgan St.,Cincinnati, Ohio 45206
Fisher Radio, 21-2444 Dr.,Long Island City, N.Y. 11101
Foxboro Co., New Ponset Ave.,Foxboro, Mass. 02035
Freed Transformer, 1718 Weirfield St.,Brooklyn, N.Y. 11227
G
GAM Electronics, 138 Lincoln St.,Manchester, N.H. 03103
G&W Electric Specialty Co., 3500 W. 127St., Blue Island, III. 60406
Gator Probe Corp., 2751 San Juan Rd.,Hollister, Calif. 95023
GC Electronics, 400 S. Wyman St.,Rockford, III. 61101
Garrard Sales, 80 Shore Rd.,Port Washington, N.Y. 11050
Gavin Instruments, Depot Sq. & DivisionSt., Somerville, N.J. 08876
Gem City Tuner Repair, Box 6, Dabel
Station, 2631 Mardon Drive,Dayton, Ohio 45420
General Dynamics/Electronics, 1407 N.Goodman St., Rochester, N.Y. 14609
General Electric Audio Products Div.,Decatur, III.
General Electric CommunicationsProducts Div., Lynchburg, Va.
General Electric Receiving Tube Dept.,Owensboro, Ky. 42301
General Electric Receiver Div.,Utica, N.Y.
General Instrument, 65 Gouveneur St.,Newark, N.J. 07104
General Precision GPL Div.,Mount Kisco, N.Y. 10549
General Radio, West Concord, Mass. 01742
General Radiotelephone Co., 3501 W.Burbank Blvd., Burbank, Calif. 91505
Gertsch Products, 3211 S. La CienegaBlvd., Los Angeles, Calif. 90016
Grantham School of Engineering, 1505 N.Western Ave., Hollywood, Calif. 90027
Greyhound Package Express, 140 S.Dearborn, 10 S. Riverside Plaza,Chicago, III. 60606
Griffiths Electronics, 1301 E. Linden,Linden, N.J. 07036
H
H & H Equipment Co., Laotto, Ind. 46763
Hallamore Electronics, 714 N. BrookhurstSt., Anaheim, Calif. 92801
Hallicrafters Co., 4401 W. 5 Ave.,Chicago, III. 60624
Hallmark Electronics, 436 N. 31 St.,Philadelphia, Pa. 19104
Hallmark Instruments, 2620 FreewoodDr., Dallas, Tex. 75220
Hammarlund Mfg., 53 W. 23 St.,New York, N.Y. 10010
Harman-Kardon, Inc., 55 Ames Crt.,Plainville, N.Y. 11803
Hartley Products, 521 E. 162 St.,Bronx, N.Y. 10451
Hathaway Instrument, 5800 E. Jewell Ave.,Denver, Colo. 80222
Heath Co., 305 Territorial Rd.,Benton Harbor, Mich. 49022
Heintz & Kaufman Ltd., 3650 Hayden Ave.,Culver City, Calif. 90230
Hewlett-Packard, 1501 Page Mill Rd.,Palo Alto, Calif. 94304
Hickok Electrical Instrument, 10523Dupont Ave., Cleveland, Ohio 44108
Hi -Lo Mfg., 1122 Newport St., Chicago, III.Hitachi, see Sampson Co.Hoffman Electronics Consumer Prods.
Div., 3761 S. Hill St.,Los Angeles, Calif. 90007
Hollywood Television Wuerth SurgitronDiv., 1949 Moffett St., Hollywood, Fla.
Holub Industries, Inc., Sycamore, Ill.
r
BREAKTHROUGH
IN ELECTRONICS CALCULATINGStill plodding through math and electronicsproblems the slow pencil -and -paper way?Smash the paperwork barrier with this newElectronics Slide Rule.
Even if you've never used a slide rulebefore, you can whiz through resonant fre-quency calculations and inductive or capaci-tive reactance prOblems. You can findreciprocals for resistance formulas in-stantly. You can even locate tricky decimalpoints in a jiffy.
Yau can also work regular math prob-lems in a flash: multiplication, division,square roots, logarithms, trigonometry.
Anyone can use this sturdy 12 -Inch, all -metal slide rule. We show you how withour complete 4 -lesson instruction course.Slide rule, course, and handsome leathercarrying case deliberately priced low as ourway of making friends with men in Elec-frog ics. FREE booklet gives full details.Mail coupon below today.
MAIL THIS COUPON FOR FREE BOOKLET
C Cleveland Institute of ElectronicsG 1776 E. 17th St..Clevelamd.Ohio 44114
Please send me, without charge or obligation, your bookletdescribing the Electronics Slide Rule and 4 -lesson instruc-tion course. Also FREE if I act at once-a handy, pocketsized Electronics Data Guide.
How to Solve Electronics Problems in Seconds
Wall now Ilect rooms 11.1a Rule and
Name
Address
City State Zip
-t
Accredited Member National Home Study Council A Leader in Electronics Training...Since 1934 ET -130
. . . for more details circle 110 on postcardJUNE 1969
75
Honeywell Commercial Residential Div.,2753 4th Ave., Minneapolis, Minn.
Hudson Lamp Company, 528 Elm St.,Kearny, N.J. 07032
Hunter Sales R.N., 9851 Alburtus Ave.,Santa Fe Springs, Calif. 90670
Hycon Electronics, 1030 Arroyo Pkwy.,Pasadena, Calif. 91105
Hy -Gain Electronics, 8473 N.E. Hwy. 6,
Lincoln, Neb.Hysol Co., 322 Houghton,
Olean, N.Y. 14760
I E H Manufacturing Co., 102 Prince St.,New York, N.Y. 10012
IERC Div., Box 271, Burbank, Calif. 91503Illumitronic Engineering, 680 E. Taylor St.,
Sunnyvale, Calif.Injectorall Co., 4 N.,
Great Neck, N.Y. 11024Institute of Electrical & Electronic
Engineers (IEEE), 72 W. 45th St.,New York, N.Y. 10036
Intl Business Machines, 590 MadisonAve., New York, N.Y. 10022
Intl Correspondence Schools,Scranton, Pa. 18515
Intl Crystal Mfg., 18 N. Lee,Oklahoma City, Okla. 73102
Intl Electronics, 316 S. Service Rd.,Melville, L.I., N.Y. 11746
Intl Rectifier, 233 Kansas St.,El Segundo, Calif. 90245
IRC Inc., 401 N. Broad,Philadelphia, Pa. 19108
I -T -E Circuit Breaker, 601 E. Erie Ave.,Philadelphia, Pa. 19134
IT&T, 320 Park Ave., New York, N.Y. 10022IT&T Components, 100 Kingsland Rd.,
Clifton, N.J. 07013IT&T Distributor Products, 250 Broadway,
New York, N.Y. 10007
Jackson Electrical Instrument,124 McDonough St., Dayton, Ohio 45402
J -B -T Instruments, 61 Hamilton,New Haven, Conn. 06511
Jensen Industries Div. Electrovoice,633 Cecil St., Buchanan, Mich. 49107
Jensen Mfg., 6601 S. Laramie,Chicago, III. 60638
Jensen Tools, 3630 E. Indian School Rd.,Phoenix, Ariz. 85018
Jerrold Electronics, 401 Walnut St.,Philadelphia, Pa. 19132
Jersey Specialty Co., Box 576,Mountain View, N.J.
Jetronic Industries, 4312 Main St.,Philadelphia, Pa. 19127
JFD Electronics, 1462 62 St.,Brooklyn, N.Y.
Johnson Co. E. F., 6516 10th Ave. S.W.,Waseca, Minn. 56093
Jonard Industries Corp., 3047 TibbettAve., Bronx, N.Y. 10463
Jones & Laughlin, 401 Liberty,Pittsburgh, Pa. 15222
Jones Div. Cinch Mfg., 1026 S. Homan,Chicago, III. 60624
W Electronics, 1538 W. Jarvis,Chicago, III. 60626
J W Electronics, PO Box 51,Bloomington, Ind. 47401
K
KLH Research & Devel, 30 Cross St.,Cambridge, Mass. 02138
KTV Tower & Com. Equip. Co.,PO Box 294, Sullivan, III. 61951
Karg Laboratories, 162 Ely Ave. S.,Norwalk, Conn. 06854
Karison Assoc., 1610 Neck Rd.,Brooklyn, N.Y. 11229
Kaar Engineering Co., 2998 MiddlefieldRd., Palo Alto, Calif. 94306
Kay Electric, 14 Maple,Pine Brook, N.J. 07058
Kay-Towens Antenna Co., PO Box 593,
Rome, Ga. 30162Kenwood Electronics, 3700 S. Broadway
Pl., Los Angeles, Calif. 90007Kepco Inc., 131-38 Sanford Ave.,
Flushing, N.Y. 11355Kester Solder, 4201 Wrightwood,
Chicago, III. 60639Klipsch & Assoc., PO Box 96,
Hope, Ark. 71801Kinematix Inc., 2040 W. Washington,
Chicago, Ill. 60612Knob Corp. of America, 469 Jericho Tpk.,
Mineola, N.Y. 11501Koss Inc., 2227 N. 31 St.,
Milwaukee, Wis. 53208Kraeuter Tools, 332 South Michigan Ave.,
Chicago, III. 60604Krylon Inc., Ford & Washington St.,
Norristown, Pa.Kwikheat Mfg., 3731 San Fernando Rd.,
Glendale, Calif. 91204
L
LA Turner Exchange, 4611 W. Jefferson,Los Angeles, Calif. 90016
Lafayette Radio Electronic, 111 JericoTpk., Syosset, L.I., N.Y. 11791
Lakeside Industries, 5234 N. Clark St.,Chicago, III. 60640
Lambda Electronics, 515 Broad Hallow,Huntington, N.Y. 11743
Lampkin Labs, Bradenton, Fla. 33505Lance Antenna, 1730 1st St.,
San Fernando, Calif. 91340Lansing Sound James B., 3249 Casitas
Ave., Los Angeles, Calif. 90039Larsen Electronics Inc., 11611 N.E. 50th
Ave., Vancouver, Wash. 98665Lavoie Labs, Morganville, N.J. 07751Leach Corp., 18435 Susana Rd.,
Compton. Calif. 90221
Leader Instruments Corp., 24-20 JacksonAve., Long Island City, N.Y. 11101
Lectrotech Inc., 1221 W. Devon Ave.,Chicago, III. 60626
Ledex Inc., 123 Webster,Dayton, Ohio 45402
Leeds & Northrup, 4907 Stenton,Philadelphia, Pa. 19144
Lesa of America, 11 W. 42 St.,New York, N.Y. 10036
Littlefuse Inc., Des Plaines, Ill.Litton Industries, 336 N. Foothill,
Beverly Hills, Calif. 90210Loral Distributor Products, Pond Hill
Industrial Park, Great Neck, N.Y. 11022Los Angeles Turner Exchange, 4611 W.
Jefferson, Los Angeles, Calif. 90016
M
3M, 2501 Hudson Rd.,St. Paul, Minn. 55119
Macdonald & Co., 213 So. Brand Blvd.,Glendale, Calif. 91204
McIntosh Labs, 2 Chambers St.,Binghamton, N.Y. 13903
Magnavox Co., 2131 Bueter Rd.,
Ft. Wayne, Ind.Magnecord Div. Midwestern Instrument,
PO Box 7186, Tulsa, Okla. 74105Magnetrack Box, 147 Caroline,
Puerto Rico, U.S.A.Majestic Intl, 743 LaSalle St.,
Chicago, III. 60605Mallory & Co. P. R., PO Box 1558,
Indianapolis, Ind. 46206Marantz, 25-14 Bdwy.,
Long Island City, N.Y. 11106Marconi Instruments, 111 Cedar Lane,
Englewood, N.J. 07631Mark Products, 5439 W. Fargo,
Skokie, III. 60076Master Mobile Mounts, 4125 W. Jefferson
Blvd., Los Angeles, Calif. 90016Matsushita Electric Co., 200 Park Ave.,
New York, N.Y. 10017Mercury Electronics, 315 Roslyn Rd.,
Mineola, N.Y. 11501Mercury TV Tuner Service, 890 River,
Bronx, N.Y.Merit Coil & Transformer, Merit Plaza,
Hollywood, Fla.Metex Corp., 970 Durham Rd.,
Edison, N.J. 08817Methode Mfg., 7447 W. Wilson Ave.,
Chicago, III. 60656Metrex (UXL Corp.), 819 Blake Ave.,
Brooklyn, N.Y. 11207Metritape Controls, 33 Sudbury Rd.,
Concord, Mass. 01742Michigan Magnetics,
Vermontville, Mich. 49096Microflame Inc., 7800 Computer Ave.,
Minneapolis, Minn. 55424Midland Int. Corp., 1519.21 Atlantic N.,
Kansas City, Mo. 64116Midland Industries Inc., 8219 W. Irving
76ELECTRONIC TECHNICIAN/DEALER
Blvd., Wichita, Kansas 67209Mid -State Tuner Service, 1504 So. College,
Box 1141, Bloomington, Ind. 47401Milgray/N.Y., 136 Liberty St.,
New York, N.Y. 10006Millen Mfg. James, 150 Exchange,
Malden, Mass. 02148Miller Co. J. W., 5917 S. Main,
Los Angeles, Calif. 90003Milo Electronics, 530 Canal,
New York, N.Y. 10013Monarch Elec. Intl Inc., 7035 Laurel
Canyon Blvd. N., Hollywood, Calif.90028
Monitoradio Div. Idea, 7900 PendletonPike, Indianapolis, Ind. 46226
Mosley Electronics, 4610 N. Lindberg,Bridgeton, Mo. 63044
Moss Electronics, 2435 White Plains Rd.,Bronx, N.Y. 10467
Motorola Communications Div., 4501 W.Augusta, Chicago, III. 60651
Motorola Consumer Prods., 9401 W.Grand Ave., Franklin Park, III. 60131
Motorola Semiconductor Products,PO Box 955, Phoenix, Ariz. 85001
Motorola Training Int., 4545 W. Augusta,Chicago, III. 60651
Mueller Electric, 1583 E. 31 St.,Cleveland, Ohio 44114
Mullard, see Intl Electronics,New York, N.Y.
Multicore Sales Corp.,Westbury, N.Y. 11590
Multitron Corp., 309 Queen Ann Rd.,Teaneck, N.J. 07666
Mura Corp., 380 Great Neck Rd.,Great Neck, N.Y. 11021
Muzak Co., 220 4 Ave.,New York, N.Y. 10003
N
National Radio Institute, 3939 WisconsinAve., Washington, D.C. 20016
Neshaminy Electronics, Neshaminy, Pa.Newark Electronics, 223 W. Madison,
Chicago, III. 60606Newcomb Audio Products Co., 12881
Bradley Ave., Sylmar, Calif. 91342Newtronics Corp., 3455 Vega Ave.,
Cleveland, Ohio 44113North American Phillips (Norelco),
100 E. 42 St., New York, N.Y. 10017Nortronics Co., 8133 10th Ave. N.,
Minneapolis, Minn. 55427Nutone Inc., Cincinnati, Ohio
0Oak Mfg. Co., Crystal Lake, III. 60014Oaktron Industries, Monroe, Wis. 53566Oelrich Publications, 4308 Milwaukee
Ave., Chicago, III. 60641Ohmite Mfg., 3673 Howard St.,
Skokie, III. 60076Olson Electronics, 464 S. Forge,
3 GUN SALUTE
Only the Sencore CRT Champion has three gun control. . . Just like the color TV set.Only Sencore has automatic color tracking to make yourjob easier.Only Sencore has the simplified instructions in thecover so that you can analyze any color CRT tube inseconds. Just flip the "Color Gun" switch from red togreen to blue (after setting the three G2 controls) andthe CR143 Champion will tell you if the tube hasadequate emission and if it will track in the TV set.Why don't you salute the Sencore Champion today bymarching in and asking your distributor to try one.You won't bring it back because it is 100 percent.
NCO_1=1NO. 1 MANUFACTURER OF ELECTRONIC MAINTENANCE EQUIPMENT
426 SOUTH WESTGATE DRIVE, ADDISON, ILLINOIS 60101... for more details circle 132 on postcard
JUNE 196977
This new E -Vphono needlepackage helps you
buy, sell,then sellagain!
E v
C 0 HOtyc,"4pmNEEDLE
aOn every new E -Vneedle package you'll find
the model number printed three extratimes on pressure sensitive tabs.Here's why:
The tabs can help you order replace-ments. Or keep track of sates. Or youcan stick one on a file card in a follow-upsystem that tells you what and when acustomer last bought (so that you cantell him when to buy again)! Or put a tabon the customer's tone arm to simplifyservice on the next call.
But don't be surprised if one of thetabs is missing. Your E -V distributor maybe using one to keep track of his stock-so that you always have the needleyou want, when you want it.
Smart ideas in packaging of theworld's finest phono service parts helpmake Electro-Voice your best buy.Available only from the parts distributorwith much more than parts to offer!
Ask for your copy of the latest Electra -Voicephono needle/cartridge combined catalog.It's free at your E -V distributor's.
ELECTRO-VOICE, INC., Dept. 697-T663 Cecil Street, Buchanan, Michigan 49107
gker6,34;caA SUBSIDIARY OF GULTON INDUSTRIES. INC.
Akron, Ohio 44308Olympic Radio & TV, 34-01 37 Ave.,
Long Island City, N.Y. 11101Ortron Electronics, 29 Lincoln Ave.,
Orange, N.J.Oxford Transducers, 3911 S. Mich. Ave.,
Chicago, III. 60653
P
Packard Bell Electronics, 12333 W.Olympic Blvd., Los Angeles, Calif. 90064
Pace Communications Corp., 24049Frampton Ave., Harbor City, Calif. 90710
Palmer Electronics Laboratories, LowellRd., Carlisle, Mass. 01741
Parker Metal Goods Co., 85 Prescott St.,Wooster, Mass.
Parts Unlimited Inc., 1 State St.,Bloomfield, N.J. 07003
Pearce -Simpson, PO Box 800 Biscayne
Annex, Miami, Fla. 33152Perma-Power Co., 5740 N. Tripp Ave.,
Chicago, III. 60646Peterson Radio Company, Inc., 2800 West
Broadway, Council Bluffs, Iowa 51501Phaostron Instruments & Electronics,
151 Pasadena Ave. S.,Pasadena, Calif. 91105
Phelps Dodge Communications ProductsDiv., Route 79, Marlboro, N.J. 07746
Philco Corp., "C" and Tioga Sts.,Philadelphia, Pa. 19134
Philharmonic Radio & TV, 235 Jersey Ave.,New Brunswick, N.J. 08901
Pickering & Co., Sunnyside Blvd.,Plainview, N.Y. 11803
Pilot Radio, 100 Electra Lane,Yonkers, N.Y.
Pioneer Electric & Research,Forest Park, III. 60130
Planet Mfg. Corp., 225 Belleville Ave.,Bloomfield, N.J. 07003
Pocket Socket Inc., 17415 Ecorse,Allen Park, Mich. 48101
Polytronics Laboratories Inc., 900Burlington Ave., Silver Spring, Md.
Pomona Electronics Co., 1500 E. 9th St.,Pomona, Calif. 91766
Potter & Brumfield, 107 N. 10th St.,Princeton, Ind. 46017
Precise Electronics, 76 E. 2 St.,Mineola, L.I., N.Y. 11501
Precision Apparatus Div. of Dynascan,1801 W. Belle Plaine Ave.,Chicago, III. 60613
Precision Electronics Inc., 9101 King Ave.,Franklin Park, III. 60131
Precision Tuner Service, PO Box 272,Bloomington, Ind. 47401
Pyramid Electronic Co.,Darlington, S.C. 29532
aQualitone Industries, 102 Columbus Ave.,
Tuckahoe, N.Y. 10707
Quam-Nichols, 234 E. Marquette Rd.,Chicago, III. 60637
Quan-Tech Labs, 60 Parsippany Blvd.,Boonton, N.J. 07005
Quietrole Co., 395 St. John St.,Spartanburg, S.C. 29302
R
Radar Devices Mfg. Corp., 22003 HarperAve., St. Clair Shores, Mich. 48080
RCA Components and Devices Div.,
415 S. 5 St., Harrison, N.J. 07029RCA Semiconductor Dist. Prod. Div.,
415 S. 5 St., Harrison, N.J. 07029RCA Parts and Accessories,
2000 Clements Bridge Rd.,Deptford, N.J. 08096
RCA Set Div., 600 N. Sherman Dr.,Indianapolis, Ind. 46201
RFS Industries, 102 Harbor Rd.,Port Washington, N.Y. 11050
RMS Electronics Inc., 50 Autin Place,Bronx, N.Y. 10462
Radiart Co., 2900 Columbia,Indianapolis, Ind. 46205
Radio Receptor, 240 Wythe,Brooklyn, N.Y. 11211
Radio Shack, 730 Commonwealth,Boston, Mass.
Rauland Corp., 4245 N. Knox,Chicago, III. 60630
Rawn Co., Spooner, Wis. 54801
REBUILDYOUR OWN
PICTURE TUBES?
With Lakeside Industries precision equip-ment, you can rebuild any picture tube!
EASY TO OPERATE!
Requires only 4 x 8 ft. of space.Your cost to rebuild black and white $1.50.
Your cost to rebuild Color- $5.80.For complete details, mail coupon.
LAKESIDE INDUSTRIES5234 N. Clark St.Chicago, III. 60640Phone: 312-271.3399
Free demonstration appointmentSend me more information
Name
AddressCity State
for more details circle 115 on postcard
78
... for more details circle 102 on postcard
ELECTRONIC TECHNICIAN/DEALER
UNIVERSAL
INVERTERSA. C. Heise1131d ElectricityAnywhere ... in your
To car, boat or plane!Operate Tape Recorders TV
Sets Dictating Ma-chines Radios Public Address Systems Elec-tric Shavers Record Players Food Mixers andEmergency Lighting. NET12U-RHG (12 V.) 175-200 W. Sh. Wt. 27 lbs. 79.6628U-RHG 28 V.) 150-175 W. Sh. Wt 27 lbs. 96.66
AIR "A" Battery
ELIMINATORFor Demonstrating endTasting Auto Radios-
TRANSISTOR or VIBRATOROPERATED!
Designed for testing D.C.Electrical Apparatus on Reg-ular A.C. Lines.
MAY ALSO BE USED AS A BATTERY CHARGERMODEL GLOC-ELIF... 6 volts at 10 amps. or 12 volt!,
Ot 6 amps. Shipping weight 22 lbs.USER NET PRICE :5982
ATRAUTO RADIO andCOMMUNICATION
LONGER -LIFE
VIBRATORS"The Best b Test!"
AMR
ATR ELECTRONICS, INC.Quality Products S.nce 1931
t Paul. Minnesota 55101-11 S.A.
. . . for more details circle 103 on postcard
Stop Callbac,with
11W--
01:11
IfISIf
lo
5
I JO
COSA ti
CONTINUOUS POLISH"*LUPINO
FOR COLOR * BBN
HIGAIN* NUVISTOII
*concentrated'cizEim
BLUE STUFF, the one that doesn't justfoam and fizzle out - the thick coatingcleans, polishes and re -lubricates eachtime the channel is changed.TECH Box 949 Amarillo, Texas 79105
Canada: Wm. Cohen, MontrealSPRAY E 'TOM Singer Products NYC. . . for more details circle 135 on postcard
JUNE 1969
Ray -O -Vac Co., 212 E. Washington St.,
Madison, Wis. 53703Raytheon Communications Prod.,
213 Grand S., San Francisco, Calif.Raytheon Distributor Products, Div.,
55 Chapel, Newton, Miss. 39345R -Columbia Products, 305 Waukegan Ave.,
Highwood, Ill. 60040Recoton Corp., 52-35 Barnett,
Long Island, N.Y. 11104Record -O -Phone Div., Electrospace Corp.,
408 Concord Ave., N.Y., N.Y. 10451Reeves Soundcraft, Great Pasture Rd.,
Danbury, Conn. 06810
Regency Electronics, 7900 PendletonPike, Indianapolis, Ind. 46226
Rego Insulated Wire, 830 Monroe,Hoboken N.J. 07030
Rek-O-Kut Co., 38-19 108 St.,Corona, N.Y. 11368
Robert Electronics, 829 N. Highland Ave.,Hollywood, Calif. 90028
Robert Bosh Corp., Blaupunkt Car RadioDiv., 40-25 Crescent, Long Island City,N.Y. 11101
Robins Industries, 1558 127 St.,College Pt., N.Y. 11356
Rockbar Corp., 650 Halstead,Mamaroneck, N.Y. 10543
Rohm Mfg., 1116 Limestone St.,Peoria, III.
Rustrak lrstrument, 130 Silver,Manchester, N.H. 03103
S
S&A Electronics, 204 W. Florence St.,Toledo, Ohio 43605
Sadelco Inc., 601 W. 26th St..New York, N.Y. 10001
Salch & Co., Herbert Marketing Div.,Tompkins Radio Prod.,Woodsboro, Texas 78393
Sampson Co., 2244 S. Western Ave.,Chicago, III. 60608
Sangamo Electric, 1301 N. 1 lst,Springfield, III. 62702
Sansui Eiectronics Corp., 34-43 56th StWoodside, N.Y. 11377
Sargent Gerkhe Co., 323 W. 15th St.,Indianapolis, Ind. 46202
Sarkes Tarzian Tuner Service, 537 S.Walnut, Bloomington, Ind. 47401
Sarkes Tarzian Tuner Service, 547-49Tonnele, Jersey City, N.J. 07307
Sarkes Tarzian Tuner Service, 10654Magnolia N., Hollywood, Calif. 90028
Schematic Library, 809 N. 7th St.,Phoenix, Ariz. 85006
Schober Organ, 43 W. 61,New York, N.Y. 10023
Scott Irc., HH 111 Powdermill Rd.,Maynard, Mass. 01754
Seco Electronics, 1201 W. Clover Dr.,Minneapolis, Minn.
INTRODUCING
The Ultimate In
Tuner Washes..
FORTCLEANS
DEGREA
RESTORATE IN TO
wASHR'GREASE,
10 DUET.
It THE MAKERS of F
CIESTIlif
BLUE SHOWER washes and degreases alltuners-safely and quickly because BLUESHOWER is 30% more powerful thanother cleaners of this type - literallygoods away the dirt and contaminationthat caused tuner drift and trouble forfrou. BLUE SHOWER leaves nc residueand can't contaminate even the most sen-sitive parts of the tuner such as neutraliz-ing and RF coils. After using BLUESHOWER we recommend treating thecontacts with BLUE STUFF FOR TUN-ERS which will clean the contacts eachtime the channel is eianged.
SPECIAL INTRODUCTORY OFFERBuy 1 can of BLUE SHOWERand 1 can of BLUE STUFF
and get a second can ofBLUE STUFF FREEOffer good for a limited time atparticipating jobbers everywhere
liECEM Box 949 Amarillo, Texas 79105Canada: Wm. Cohen, MontrealSPRAY Export: Singer Products NYC
. . . for more details circle 136 on postcard
79
Seco Pectronics, 1001 Second StreetSoL 1, Hopkins, Minn. 55343
Semitronics Corp., 265 Canal St.,w York, N.Y. 10013
SE core Inc., 426 S. Westgate Rd.,Addison, III. 60101
Sentinel Inc., PO Box 336,Garland, Texas 75040
Sentry Electronics Inc., 707 S.Okfuskee, Wewoka, Okla. 74884
Setchell-Carlson, 530 5th Ave. N.W.,St. Paul, Minn. 55112
Sherwood Electronic Labs, 4300 N.California Ave., Chicago, III. 60618
Shure Brothers, 22 Hartrey Ave.,Evanston, III. 60202
Signalite, Inc., Neptune, N.J.Simpson Electric, 5200 W. Kinzie St.,
Chicago, III. 60644Singer Co., 3211 So. La Cienega Blvd.,
Los Angeles, Calif. 90016Slep Electronic Co., Automotive Div.,
PO Box 178, Ellenton, Fla. 33532Smith Inc., Herman H., 2326 Norstrand,
Brooklyn, N.Y. 11210Snyder Mfg., 22 Y Ontario,
Philadelphia, Pa.Sola Electric, 1717 Busse Rd.,
Elk Grove Village, Ill.Sonar Radio, 73 Westman Ave.,
Brooklyn, N.Y.Sonotone Corp., Elmsford, N.Y. 10523Sony Corp. of America, 580 5th Ave.,
New York, N.Y. 10036Sorensen Prods. Div., Raytheon S.,
Norwalk, Conn.Soundolier Inc., PO Box 3848,
St. Louis, Mo.South River Metal Products, 377 Tpk. Rd.,
South River, N.J. 08882Sprague Products, 65 Marshall St. N.,
Adams, Mass. 01247Sprayon Products Inc.,
Bedford Heights, Ohio 44146Stockpole Carbon Electronics Div.,
St. Marys, Pa.Stancor Electronics, 3501 W. Addison,
Chicago, III. 60618Standard Instrument Corp., 657 Broadway,
New York, N.Y. 10012
Standard Kollsman Industries, 2085 N.Hawthorne, Melrose Park, III. 60160
Stromberg-Carlson Div., GeneralDynamics, 1400 N. Goodman St.,Rochester, N.Y. 14609
Sturtevant Co., PA, Addison, III. 60101Superex Electronics Corp., 4 Radford
Place, Yonkers, New YorkSuperior Electronics, 208.212 Piaget Ave.,
Clifton, N.J. 07011Superior Tuner, 1377 N. Curry Pike,
PO Box 368, Bloomington, Ind. 47401Swing 0 Lite Inc., 13 Moonachie Rd.,
Hackensack, N.J.
Switchcraft Inc., 5555 N. Elston,Chicago, III. 60603
Sylvania Electronic Products, 730 3rdAve., N.Y., N.Y. 10017
Sylvania Electronic Tube Div.,Seneca Falls, N.Y. 13148
Symphonic Radio & Electronic,10 Columbus Circle N.,New York, N.Y. 10023
Tab Books, Monterey & Pinola Ave.,Blue Ridge Summit, Pa. 17214
TACO, Sherburne, N.Y. 13460TRX Electronic Corp., 200 Park Ave. S.,
New York, N.Y. 10003TV Tuner Service, 2103 W. 3rd St.,
Bloomington, Ind. 47401TV Tuner Service, 118 3rd St., W.,
Twin Falls, Idaho 83301Talk A Phone Co., 5013 N. Kedzie Ave.,
Chicago, III. 60625Tandberg of America, 83 Ave.,
Pelham, N.Y. 10803Tap A Line Mfg., PO Box 563,
Pompano Beach, Fla. 33061Tech -Master, 75 Front St.,
Brooklyn, N.Y. 11201Techni-Parts Corp., 156 Hempstead Tpk.,
W. Hempstead, L.I., N.Y. 11552Techpress Inc., Brownsburg, Ind. 46112Tektronix Inc., PO Box 500,
Beaverton, Ore. 97005Telerad Div., Lionel Corp., Route 69-202,
Flemington, N.J. 08822Telex Inc., 3054 Excelsior,
Minneapolis, Minn. 55416Telex/Aemco Div., Telex Inc.,
Mankato, Minn. 56001Teleonic Industries, 60 N. 1st Ave.,
Beech Grove, Ind. 46107Telvac Instrument Co., 18531 Ventura
Blvd., Tarzana, Calif. 91356Tenatronics Ltd., 1011 Power Ave.,
Cleveland, Ohio 44114Tenna Mfg., 19201 Cranbrook Pkwy.,
Cleveland, OhioTennalab, 10 & State St.,
Quincy, III. 62301Terado Co., 1068 Raymond Ave.,
St. Paul, Minn. 55108Texas Crystals, 1000 Crystal Dr.,
Ft. Myers, Fla. 33901Thomas & Betts Co., Inc., 36 Butler St.,
Elizabeth, N.J. 07207Thomas Electronic Organs,
8345 Hayvenhurst Ave.,Sepulveda, Calif. 91343
Thordarson-Meissner, 7 & Belmont,Mt. Carmel, III. 62863
Thorens Div., Atlantic & Steward Ayes.,EL PA Mktg., Ind.,New Hyde Park, N.Y. 11040
Toshiba Mitsu & Co., 530 5th Ave.,New York, N.Y. 10036
Tram Electronics, Lower Bay Rd.,PO Box 187, Winnisquam, N.H. 03289
Tray Ler Radio, 571 W. Jackson,Chicago, III. 60606
Triad Transformer, 4055 Redwood Ave.,Ven:ce, Calif. 90291
Trio Mfg., Griggsville, III. 62340Triplett Electrical Instrument, 286 Harmon
Rd., Bluffton, Ohio 45817Trippe Electronics, 133 North Jefferson,
Chicago, III. 60606Tuner Inc., 6302 5th Ave., Brooklyn, N.Y.Tuner Service Corporation, 817 N.
Pennsylvania St., Indianapolis, Ind.Tuner Service Corporation,
547-49 Tonnele Ave., Jersey City, N.J.Tuner Service Corporation, 938 Gordon
St., S.W., Atlanta, GeorgiaTuner Service Corporation, 10654
Magnolia Blvd., North Hollywood, Calif.Tung -Sol Electric, 1 Summer Ave.,
Newark, N.J. 07104Turne! Co., 918 17th St. N.E.,
Cedar Rapids, Iowa 52401
U
Ullman Devices, Ridgefield, Conn. 06877Ungar Co., Sid, 1880 Rayford Dr.,
Los Aigeles, Calif. 90045Ungar Electric Tools, 2701 W. El Segundo
Blvd., Hawthorne, Calif. 90250Union Carbide, 270 Park Ave.,
New York, N.Y. 10017Useco Div., Litton Industries, Inc.,
13536 Saticoy St.,Van Nuys, Calif. 91402
Utah Electronics, 1123 E. Franklin St.,Huntington, Ind. 46750
U Test M Mfg., 4325 W. Lincoln,Milwaukee, Wis. 53219
United Transformer, 150 Varick St.,New York, N.Y. 10013
University Loudspeakers Div.,Ling Temco Vought, 9500 W. Reno St.,Oklahoma City, Okla.
Up Right Towers, 1013 Pardee St.,Berkeley, Calif. 94710
Utah Radio & Service Corp., 1123 E.Franklin St., Huntington, Ind. 46750
Utica Drop Forge & Tool,2415 Whitesboro, Utica, N.Y. 13502
Utica Electronic Communications, 2714W. Irving Pk., Chicago, Ill. 60618
V
V -M Corp., Territorial Rd.,Benton Harbor, Mich. 49022
Vaco Products, 510 N. Dearborn,Chicago, III. 60610
Valley TV Tuner Service, 5641 CahuengaBlvd. N., Hollywood, Calif. 90028
Vector Electronic, 1100 Fowler St.,Glendale, Calif.
Victoreen Instrument, 5806 Hough Ave.,Cleveland, Ohio 44103
80ELECTRONIC TECHNICIAN/DEALER
/-
Vidaire Electronics, 365 Babylon Tpk.,Roosevelt, L.I., N.Y. 11575
Video Industries Co., 242 Madison Ave.,Port Chester, N.Y. 10573
Viking Cable Co., 400 9th St.,Hoboken, N.J. 07030
Viking of Minnesota, 9600 Aldrich St.,Minneapolis, Minn.
Viking Electronics, 830 Monroe,Hoboken, N.J. 07030
Vitramon Inc., Box 544,Bridgeport, Conn. 06601
Vocaline Co. of America, 133 Colter St.,Old Saybrook, Conn. 06475
Volkswagen of America, 476 HudsonTerrace, Englewood Cliffs, N.J. 07632
Waber Electronics, 200 N. 2nd St.,Philadelphia, Pa. 19106
Walco Electronics, 60 Franklin St.,East Orange, N.J. 07017
Waldom Electronics, 4625 W. 53rd St.,Chicago, Ill. 60623
Wall Mfg. Co. P, Grove City, Pa. 16127Waller Corp., Crystal Lake, III. 60014Wallin -Knight Industries, 3321 McKinley
St. N.E., Minneapolis, Minn. 55108Walsco Electronics, S. Wyman St.,
Rockford, III. 61101Ward Leonard Electric, 115 McQueston
Pkwy., Mt. Vernon, N.Y.
Ward Products, Edsom St.,Amsterdam, N.Y. 12010
Weathers Irdustries, 66 E. GloucesterPike, Barrington, N.Y. 08007
Webcor Inc , 5626 Bloomingdale Ave.,Chicago, Ill. 60639
Weller Electric, 601 Stone Crossing Rd.,Easton, Pa.
Wells -Gardner, 2701 N. Kildare Ave.,Chicago, Ill. 60639
Wen Products, 5810 Northwest Hwy.,Chicago, III. 60631
Western Electric Co., Inc., 195 Bdwy.,New York, N.Y. 10007
Western Tuner Rebuilders, 1140 N.Vermont Ave., Los Angeles, Calif. 90029
Westinghouse Electric Radio TV Dept.,Metuchen, N.J. 08840
Westinghouse Electric Corp., Tube Div.,PO Box 284, Elmira, N.Y. 14902
Wilco Co., 4425 Bandini Blvd.,Los Angeles, Calif. 90023
Windsor Electronics, 999 N. Main St.,Glen Ellyn, III. 60137
Winegard Co., 3019 Kirkwood,Burlington, Iowa 52601
Wire Products Co., 1215 South Ave.,Syracuse, N.Y. 13207
Workman Electronic Products, Box 5297,Sarasota, Fla. 33579
Worner Electronic, Rankin, III. 60960Wuerth Tube Saver Corp., PO Box 66,
GREAT REPAIR TOOL
(HAND -SIZED)
Gas WeldingTorch
5000° PinpointFlame Welds,Brazes, Solders
(Self Contained.No wires orconnections needed.)
Ideal for workshop, electrical/electronic repair, labwork, miniaturegasblowing, wiring, jewelry making.
FREE LITERATURE
MICROFLAME, INC.Division of Printed Circuits, Inc.
7800 Computer Avenue, Dept. ET -2Minneapolis, Minnesota 55424
Area 612 - 927-5681
Hollandale, Fla.Wurfttzer Co., N. Tonawanda, N.Y. 14150
X
Xacto, Inc., 48-41 Van Dam St.,Lcng Island City, N.Y. 11101
Xcelite, Inc., 12 Bank St.,Orchard Park, N.Y. 14127
Y
Yeats Appliance Dolly Sales Co., 2124 N.12th St., Milwaukee, Wis. 53205
Zenith Sales Corp., 6001 W. Dickens,Chicago, III. 60639
Keep our leaders coming!
GIVE TO THE COLLEGE
OF YOUR CHOICE.
advertising contributed for the public good
AID TO HIGHER EDUCATION CAMPAIGN
MATV DISTRIBUTIONAMPLIFIER KITS
for Co I or /B&w TV
Model AMP -25/2
For the TV serviceman who has avoided amplifieddistribution systems as too involved, Mosley hasdeveloped four simple and easily installed MATVDistribution Amplifier Kits for VHF Color/B&W TV.Each kit contains all the components necessary fora two -outlet amplified system, designed for easyexpansion with additional outlets. Four models forfour widely -used types of lead-in: two coax, twotwin -lead. Instruczions offer suggestions for systemplanning and simple block diagrams with coax lossfactors already figured. Write Dept. 180A for details.
',mirky &Am& .944 4B601dOgeNt.onLMissourin
ber g1, B63k0d4.i
. . . for more details circle 124 on postcard
JUNE 1969
. . . for more details circle 125 on postcard
81
MAKEYOUROWN
TUNER TEST!If you're like most professional TV tech-
nicians, you clean the tuner of every chassis youservice.
But how careful are you in choosing your tunerspray? The wrong spray can cost you a lot Inaggravation and callbacks.
That's why we ask you to
MAKE THIS TEST YOURSELF1. Tune in a good color picture on any color set.2. Spray the tuner with anything but a Chem-
tronics Spray.You will see the color fade and disappear al-most immediately, due to the changes ofcapacitance in tuned circuits caused by thespray.
COLOR
CARRIER
NORMAL RESPONSE
AC--- COLORCARRIER
RESPONSE DETUNEDBY SPRAY
4. Walt about 10 minutes for the spray to dry.Unfortunately, the color will not come back.
5. Spray the tuner with Chemtronics TUN -0 -WASH.6. Wait about two minutes and color will be re-
stored.
WHAT THIS TEST MEANS TO YOUMost tuner sprays leave a residue of slow dry-
ing petroleum base lubricant. This saturates thecoils and other components causing a shift Inresponse as shown in illustration.
To compensate for this shift, you often adjustoscillator slugs. Then, when the set has playedin your customer's house for a week or two, theresidue dries out, shifting the oscillator backtoward its original frequency. If the customercan't compensate for this drift with the finetuner, you have a callback on your hands. Evenif the drift is not too severe, the remaining resi.due picks up dirt and eventually "gunks up"the tuner.
TUN -O -WASH IS LIKE NO OTHERSPRAY ON THE MARKET
TUN -O -WASH is a powerful, high pressure spraydesigned to do just one job superlatively well.It melts away grease, oil, dirt and corrosionquickly and completely. It leaves absolutely noresidue behind. Tests show that TUN -0 -WASH isat least 10 times as effective as any other tunerspray in degreasing gunked up tuners.
Use TUN -0 -WASH as your first step in repair-ing any tuner. It gives you a clean start in muchthe same way as the ultrasonic bath used bytuner specialists - but without harmful vibra-tion. You'll be surprised at howmany tuners you can repair theTUN -0 -WASH way.
Then, once the tuner Is restoredto good working condition, you canlubricate it with a light spray ofChemtronics famous COLOR-LUBE,guaranteed not to detune, attackplastic parts or "gunk up." COLORLUBE uses a unique synthetic lu-bricating formula developed spe-cifically for color TV tuners,
11111
Giant 24 oz. canonly $3.25 dealer net.
1260 RALPH AVENUE BROOKLYN, N.Y. 11238
AD INDEX
American Telephone & Telegraph 23
Associated Industries (Div. Lakeside) 78
ATR Electronics 79
B & K Division 34, 74
BSR (USA) LTD. 64
Centralab 82
Chemtronics 73, 82
Cleveland Institute 75
Commander Electronics 30
C.R.T. Equipment 3rd Cover
Delco Radio Div.
EICO Corp.
Electro-Voice
63
2nd Cover
78
Finney Company 31
Gem City Tuner Service 26
Heath Company 71
JFD Electronics 25
Lampkin Labs 26
Leader Instruments 28
Lectrotech 67
Marquette Corp. 33
J. W. Miller 28
Mosley Electronics 81
Printed Circuits 81
Quam Nichols 60
Quietrole Company 26
Radio Corporation of America 4th Cover
RCA Institute 30
RCA Test Equipment 61
Sencore 22, 69, 77
Sprague 27
Sylvania 29
Tech Spray 79
Triplett 20
Tuner Service Corp. 19
Weller Electric 59
Xcelite Inc. 60
Zenith Sales Corp. 65, 70
Packaged
and pricedfor you
1.00k for theCentralab Capacitor
Carousel ... 166of the most requested
capacitances. Extravalue in every pack,each pack priced to
you at SLIM
You've never beer able to select andbuy capacitors so easily. Centralab'snew Capacitor Carousel proves that bet-ter packaging and better pricing can in-crease your profits from service work.Bubble packs of ceramic, low -voltagesemiconductor type, electrolytic andpolystyrene capacitors are identified bytype, capacitance, tolerance and voltage.They provide a package that makes forbetter housekeeping. Capacitor Carou-sels are at your Centralab Distributor.
DISTRIBUTOR PRODUCTS
MINIM
OroCENTRALAB
Electronics Do.s.onGLOBE -UNION INC.
DON'T FORGET TO ASK"WHAT ELSE NEEDS FIXING?"
... for more details circle 109 on postcard . . . for more details circle 107 on postcard
ELECTRONIC TECHNICIAN/DEALER82
THE PROFIT -MAKER!
40'
65"
REBUILDS ANY SIZE ROUND OR RECTANGU-LAR COLOR PICTURE TUBES . . . AVERAGECOST PER TUBE $7.80
REBUILDS ANY SIZE BLACK AND WHITE PIC-TURE TUBE . . . AVERAGE COST PER TUBE$1.80
FREE INSTALLATION AND TRAINING ANY-WHERE IN THE CONTINENTAL U.S.A.
FREE SUPPLIES FOR REBUILDING YOUR FIRST50 PICTURE TUBES
EXTREMELY EASY TO OPERATE INCLUDES LAMINATING AND DELAMINAT-
ING EQUIPMENT FOR REBUILDING BLACKAND WHITE AND COLOR BONDED -FACEPICTURE TUBES.
INCLUDES ALL TOOLS FOR REBUILDINGROUND AND RECTANGULAR COLOR PICTURETUBES
INCLUDES ALL TOOLS FOR REBUILDINGBLACK AND WHITE PICTURE TUBES
1111111'.
-7,11111 11111F
i111110111111111111111111111111111111111111111011111111111111001?
,1111111i111111111 1111,111 111111111 11111111111111111111111;1111M111111111111111111111111111111111111111'
CRT COLOR CHAMPION . . . $2,875.00 Mail Coupon Today For FREE CATALOG
C.R.T. Equipment Company, Inc.2740 Old Lebanon RoadNashville, Tennessee 37214
Telephone (615) 883-0215
l'Icase Print
Name
Firm Name
Address
City
State Zip
. for more details circle 112 on postcard
Confidence builderRCA HI-LITE color picture tubesWhen does a component contribute more to a service call than simplythe solution to your customer's problem? When it also contributes to yourservice reputation! Such is the case with HI-LITE picture tubes whereRCA's experience in Color TV truly shows its hand.
When you install a HI-LITE replacement picture tube you know... andyour customers can be told ... that here is the same qua'ity ... the sametube ... that goes into original equipment sets. That it's all new-glass, gun, the works! And that it incorporates the latest technicaladvancements of the world's most experienced color picture tubemanufacturer, such as PERMA-CHROME and Unity Current Ratios. Allthis ... plus the broadest line of types in the industry.
See your Authorized RCA Distributor for your tube needs. Install thebrand that instills confidence.
RCA Electronic Components, Harrison, N.J.
RCA