ectr echnicia - americanradiohistory.com...electronic technician and circuit di-gests, published...

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ECTRECHNICIA

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60CJANUARY 1963

NEW. IRC Vinyl Electrical TapeFast, safe one -hand insulating

New IRC Type 103 Vinyl Electrical Tape has every-thing a good tape should have . . . and then some. 2 to 18 times better dielectric strength than other tapes. Seals and insulates in one fast tape -and -tear operation

. . . saves tape and time. UL approved as a single insu-lation for wire splices.

Saves space in confined areas . . . ends "twice -around"wraps with bulky tapes.

Provides a tight insulated plastic seal . . . resistant toabrasion, water, acids, alkalies, corrosion and aging.

Gives a neater wrap . . . adheres readily to irregularsurfaces and contours.

Makes an excellent wrap for insulating tools.

TAPE -AND -TEAR DISPENSER

For fast, one -hand taping IRC Vinyl Electrical Tapecomes to you in a sturdy tape -and -tear dispenser. It keepstape clean and prevents stretching. Cutting blade isshielded for your protection. Dispenser is loaded with 66feet of Yi" tape . . . ready for instant use.Also available in cellophane wrapped rolls:

34" wide by 20 feet long3A' wide by 20 feet longVs' wide by 36 yards long

Ask for IRC Vinyl Electrical Tape at your ElectronicParts Distributor.International Resistance Co., Philadelphia 8, Pa.

1

- - - for more details circle 25 on post card

ONE UNIT forALL Ciffil TESTS

0.4i-CDElE ff,t.7.5GTizzor-4IC::::::

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tom,;:

oftcrvvitafto -rpttAt..r,tep.

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JP Albi.

F=.0-0:=14^-41EIESS

11041.

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LOBE SIGNAL OPTIMIZERELECTRONICS

7 in 1 C -B TESTERBe certain you're getting top performance from yourC -B units and installation. Make servicing a snap.7 pieces of test equipment in one handsome, portable,durable case.1 WATT METER-measures direct transmitter power output to

10 watts, measures relative transmitter power output to1000 watts.

2. MODULATOR MONITOR-tests for power robbing garbledmodulation.

3. FIELD STRENGTH METER - measures radiated antennapower.

4. TESTS OSCILLATOR-to generate RF signals through use of3rd overtone C -B Crystals.

5. MEASURES SWR.-full power obtained only with correctstanding wave ratio.

6 TESTS HARMONICS-fundamental frequency and overtonesfor correct C -B Crystals.

7 MEASURES BASE STATION OR MOBILE ANTENNA EFFI-C ENCY-adjusts directional antenna-secures optimumradiated power transfer.011y 81/2" x 5" x 1 7/8 "-2 pounds

GC ELECTRONICS Co.DIVISION OF TEXTRON ELECTRONICS, INC. 400 SO WYMAN ST. ROCKFORD, Ill USA

JANUARY 963

Model No.6S -S111

475or

SUGGESTEDNET

FREE

CATALOG

I

0 Send me a FREE copy of the latest Globe Catalogcontaining the most complete C -B product lineavailable anywhere.

E SPECIAL-C-8 Book-the whole C -B stor, whatyou can ,nd can't do-installation and testing in-formation, noise control, tuning up gear-even aC-8 ling, dictionary. Compiled by experts-regularly selling for 2.00-NOW FOR A LIMITEDTIME ONLY 1.00 (Send Cash or Money Order to:)

GC ELECTRONICS CO., Dept. 16400 S. Wyman St., Rockford, Illinois, USA

NAME

ADDRESS

CITY STATE

Dept. 16


3

Prices effective January 1, 1963

Tarzian offers

FAST, DEPENDABLE

TUNER REPAIR

SERVICE !MANES)

L

It just makes sense that a manufacturer of tuners shouldbe better -qualified, better -equipped to offer the most de-pendable tuner repair and overhaul service.

Sarkes Tarzian, Inc. pioneer in the tuner business,maintains two complete, well-equipped Factory ServiceCenters-assisted by Engineering personnel-and staffedby specialized technicians who handle ONLY tuner re-pairs on ALL makes and models.

Tarzian-made tuners received one day will be repairedand shipped out the next. Allow a little more time forservice on other than Tarzian-made tuners.

Tarzian offers a 12 -month guarantee against defectiveworkmanship and parts failure due to normal usage. And,compare our cost of $9.50 and $15 for UV combinations.There is absolutely no additional, hidden charge, for ANYparts except tubes. You pay shipping costs. Replacementson tuners beyond practical repair arP available at low cost.

Tarzian-made tuners are identified by this stamping.When inquiring about service on other tuners, always

give TV make, chassis and Model number. All tunersrepaired on approved, open accounts. Check with yourlocal distributor for Sarkes Tarzian replacement tuners,replacement parts, or repair service.

\-T-ISARKES TARZIAN, INC.Bloomington, Indiana

MANUFACTURERS OF TUNERS . . . SEMICONDUCTORS . . . AIRTRIMMERS ... FM RADIOS ... AM/FM RADIOS ... AUDIO TAPE ...BROADCAST EQUIPMENT

ONLY

50INCLUDING

FALL PARTS(except tubes)

iLanclaBa24 -HOUR SERVICE

1 -YEAR WARRANTYwr yip

TWO SERVICE CENTERSTO SERVE YOU BETTER

See your distributor, or use theaddress nearest you for fast fac-tory repair service

537 South Walnut St.Bloomington, IndianaTel: 332-6055

10654 Magnolia Blvd.North Hollyw3od, Calif.Tel: 769-2720

4 ELECTRONIC TECHNICIAN

WORLD'S LARGEST

ELECTRONIC TRADE

CIRCULATION

RON KIPP Publisher

TOM COOPER Editorial Director

JACK HOBBS Managing Editor

VICTOR L. BELL Technical Editor

WARREN CREWS Associate Editor

JACK O'CONNOR Assistant Editor

JERROLD PATTERSON Assistant Editor

EARL HINTZ Production Manager

MAGGIE KANE Advertising Production

JIM GHERNA Art Director

JERRY WHITTLESEY Circulation Manager

ETHEL NASH Circulation Fulfillment

AN OJIBWAYPUBLICATION

OJIBWAY PRESS, Inc.Ojibway BuildingDuluth 2, Minn.

AREA CODE 218, 727-8511

Sales Offices.

NEW YORK: Ron Kipp, 480 LexingtonAve., New York 17, N. Y. TN 7-0011

CHICAGO: William Klusack, 221 N.LaSalle St., Chicago 1, III. CE 6-1600

CLEVELAND: Arnold T. Suhart, 6207Norman Lane, Cleveland, Ohio.YE 2-6666

LOS ANGELES: Boyd B. Garrigan,1145 W. Sixth St., Los Angeles 17, CalifHU 2 2838

ELECTRONIC TECHNICIAN and Circuit Di-gests, published monthly for Electronic Tech-nician, Inc., Ojibway Building, Duluth 2, Min-nesota. Single copies, 60c. Subscription rates:United States and Canada S5 for one year;$8 for two years; 510 for three years. PanAmerican and Foreign countries, S9 for oneyear; $14 for two years; $18 for three years.With subscription correspondence, includemailing label from most recent issue. Second.class postage paid at Waseca, Minn. and atadd Aional mailing offices. Copyright 1963by Ojibway Press, Inc., Duluth, Minn. Re-production and reprinting prohibited exceptby written authoixation of publisher.POSTMASTER: SEND NOTIFICATION (Form3579) TO ELECTRONIC TECHNICIAN, 1 EASTFIRST STREET, DULUTH 2, MINNESOTA.If you have a change of address or a ques-tion about your subscription, write: ELEC-TRONIC TECHNICIAN, Circulation Department,Ojibway Building, Duluth 2 Minnesota. BESURE TO SEND ALONG THE ADDRESS LABELFROM YOUR MOST RECENT ISSUE.

ELECTRONICTECHNICIAN

January 1963 Vol 77 No. 1

FEATURES

Tuning in the Picture

Manufacturers Technical DigestET Viewpoint

Servicing Two -Way Mobile Transmittersby Jonathan Mivec

CB Rules And Regulatiors

CB Transceiver Maintenanceby E. M. Frickert

Math Calculations For 'Two -Way' Techsby If nie Wismer

Base Station And Mobile Antennasby h. H. Winters

Sales Up On 100 mw Transceivers

Two -Way Radio Speeds Deliveriesby Arthur Soko/o/f

Fix That Sync Trouble Fastby Ben Allen

Tube Tester Rejuvenatorby E. F. Rice

TV Horizontal And HV Repairsby Eino Niemi

Test Instruments For Bench And Caddy

'Tough Dog' Cornerby Frederick W. Hess, Paul Noel Jr.

Shop Hintsby George Warshower, Lee D. Fortun, Albert S. Lombard, T. F. Edmonds,Raymond J. James, Herman Schoenblum and Jay Prager

1962 Index Of Manufacturers Technical Digest

DEPARTMENTS

Letters to the Editor

Audio News Letter

New Products

CIRCUIT DIGESTS

6 New Books

18 News of the Industry

48 Free Literature

Advertisers Index 68

12

15

23

24

27

28

30

32

34

35

36

39

40

43

44

46

64

59

60

66

PRECEDING BACK COVER

DUMONT Chassis 120633, Series 900 Models

GENERAL ELECTRIC AM FM Tuners, ChassisTU 220

MONTGOMERY: TV Chassis, WG-1883A

P-IILCO: Stereo Phonograph, Model L-1532

S (IVAN IA TV Chassis 562, -3, -4, Models23E01

WESTINGHOUSE. TV Chassis, U 2436

JANUARY 1963 5

NEW VERSATILITY & COMPACTNESS

in PROFESSIONAL TEST EQUIPMENT

I EICO1® AC VOLT -WATT METER =261Formerly designated as 7;260/ Kit $49.93 Wired $mts

-.4,,---AC voltmeter and load -compensated audio -wattmeter of uniquequality and accuracy. Measures AC voltage from 1 millivolt to1000 volts in 11 ranges, and power from .015 milliwatt to 150watts in 7 ranges, across standard loads from 4 to 600 ohms.The instrument incorporates a tapped power resistor load(4, 8, 16, and 600 ohms) to handle up to 80 watts of power on8 ohms, and 40 watts on other taps. It may be switched toexternal load up to 150 watts. The meter is automatically com-pensated for any load selected, internal or external, to providea single watt scale for all loads and ranges.VOLTMETER:Ranges: .01, .03, .1, .3, 1, 3, 10, 30, 100, 300, 1000RMS volts. Frequency Response: __Odb 10C to 150kc, -3db at500 kc. Input Impedance: 2 megohm shunted by 15mmf.Accuracy: -.±4%.WATTMETER: Ranges: 15mw, 1.5mw, 15mw, 150mw, 1.5W, 15W,150W. Frequency Response: -±Odb 10c to 100kc. Accuracy: ±5%.Internal Loads: 4 (40W), 8 (80W), 16 (40W), 600 (40W). ExternalLoads: 4, 8, 16, 600 (all to 150W).

USE THESE!rA 1 ro rire I . . .

.METERED VARIABLE

A I, AUTO -TRANSFORMER

, III AC BENCH SUPPLIES

#1073 (3 -amp rating)Kit $35.95 Wired $47.95

.. # 1078 (71/2 -amp rating)- Kit $42.95 Wired $54.95

Connect to 60 cycle, 120 volt line andbetween 0obtain any desired voltage and

140 volts. Highly efficient variable auto-1Illy transformer of toroidal core design gives

you continuously variable output, linearoily versus rotation, with excellent regulation

waveform distortion. Modeland negligible1078 permits either 50 or 60 cycleoperation.

111 IIWilli ...USE THIS!Extra -Low -Ripple6- and 12 -VoltBATTERYa - ELIMINATOR AND

it

4' .1 CHARGER #1064

$54.954

Kit $45.95 Wired

to 60 120' Connect cycle,volt line and obtain high-

... ly filtered low dc voltagecontinuously variable over two ranges 0-8,

ik0-16 VDC. Heavy-duty pi -type LC filter is

to take the full rated current outputratedcontinuously (10 amps on 8V range, 6amps on 16V range), reduces ripple as lowas 0.3% at 2 amps on the 16V range. An

'41111111.___

essential instrument for servicing battery -operated equipment, including transistoror hybrid types, and an excellent batterycharger.

Also New From EICO:

-e) C)

AC VTVM &AMPLIFIER#250Kit $49.95Wired $79.95 '

s ..-.

- ..v. ,7#

TRANSISTORAND CIRCUITTESTER #680

Kit $25.95Wired $39.95

ED4 0

46

IN -CIRCUITCAPACITORTESTER .955Kit $19.95Wired $39.95

-

For complete catalog of over 106 EICO kits and wired units-hi-fi, test equipment, citizensradio, ham gear-plus name of nearest distributor, write to dept. ET -1.

EICO ELECTRONIC INSTRUMENT CO., INC.3300 Northern Blvd., Long Island City 1, N. Y.

ADD 5 ., IN 1111 WEST Export Dept., Roburn Agencies Inc., 431 Greenwich St., New York 13, N.Y.

L LETTERSTO THE EDITOR

There Should Be A Law . . .

Editor, ELECTRONIC TECHNICIAN:

Your July edition included the namesand addresses of importers and supplyhouses of foreign transistor radios whichyou stated would help us as service tech-nicians to obtain schematics and parts inorder to service same.

Enclosed is a card from one of theseimporters refusing to furnish parts. Isthis a sample of the service most of thesuppliers of the foreign radios will giveus? Is there not a law against selling aproduct such as this and not havingavailable replacement parts for same?Please advise.

R. H. HUNT

Kennewick, Wash.

We feel this problem can be solvedbest by close cooperation between distri-butor and service -dealer Radios shouldtrot be sold to the public unless distribu-tors and service -dealers can guarantee aneasily available supply of replacements.-Ed.

Needs Scope Manual


I have been unable to locate an oper-ating manual for a Du Mont scope, type274. I need it very badly. They are outof print. Could any of your readers helpme? I enjoy reading ELECTRONIC TECH-NICIAN very much; especially the "ToughDog Corner."

S. C. MACDONALD, JR.Providence, R. I.

New Subscriber


I have been receiving ELECTRONICTECHNICIAN for only a few months. Iwork on government equipment and alsocommercial work. I have found theschematics and articles to be very valu-able in all my work. Since receiving myfirst copy of ET two persons in my shophave subscribed. I'm sure there will bemore . .

A/1C GRADY L. HARBIN

Mt. Home AFB, Idaho

Wants New Column


I enjoy your magazine very much.Could you in the course of time institutea "Theory and Law" column for FCCCommercial or Broadcast license hold-ers? I believe it would help refresh ourmemories on electronic principles from

- for more details circle 20 on post card

ELECTRONIC TECHNICIAN

Two outstanding products by the HIDDEN

DIFILM

who plan for your future:

BLACK BEAUTY®

CAPACITORSmolded tubular

ORANGE DROP®

dipped tubular CAPACITORS

TWO GREAT TUBULARS . . . TAKE YOUR CHOICE!

( ± 10% Capacitance Tolerance is standard at no extra cost)

Sprague Difilm Capacitors can't be beat! Dual -dielectric con-struction combines the best features of both Mylar6 polyester filmand special capacitor tissue. And for additional reliability, Difilmcapacitors are impregnated with Sprague's HCX A, a solid impreg-nant which produces a rock -hard capacitor section-there's no waxto drip, no oil to leak!

BLACK BEAUTY Molded Tubulars are actually low-cost versions ofthe famous Sprague high -reliability capacitors used in modernmilitary missiles. They're engineered to withstand 105°C (221°F)temperatures . . . even in the most humid climates! And their tough,molded phenolic cases can't be damaged in handling or soldering.

ORANGE DROP Dipped Tubulars are the perfect replacement forradial -lead capacitors now used by leading manufacturers of TVsets. Leads are crimped for neat mounting on printed wiring boards.Extremely small in size, they'll fit anywhere, work anywhere. Andthey're double -dipped in epoxy resin for extra protection againstmoisture.

The "Hidden 600" are Sprague's 600 experienced researcherswho staff the largest research organization in theelectronic component industry and who back up the effortsof some 8,500 Sprague employees.

Get your copy of Catalog C614 fromany Sprague distributor, or writeSprague Products Co., 65 MarshallStreet, North Adams, Massachusetts.

65-29462WORLD'S LARGEST MANUFACTURER OF CAPACITORS

SPRAGUE`

THE MARK OF RELIABILITY

JANUARY 1963

- - - for more details circle 37 on last page

7

competitivelypriced!

famousbrandname!

SC -1009 Volt

39;retail list

QUALITY

CRY

BATTERYtor

TRANSISTOR

NoSC

"

SC.100

SC -1029 Volt

49;retail list

QUALITYY BAT1ERT

forTRANSIST

RADIO`

O. Sc 12

NOTNIE

Elmsferd.'wpm poor

SC -10011/2 voltpenlite

101retail list

NEW SONOTONE BATTERIESYour customers will be quick to recognize the value offered bySonotone dry cell batteries. They sell from 30 to 40% less thanother brand name batteries-a very substantial saving.

They have a big edge on the wide variety of unknown, non -brandname imported batteries. Sonotone batteries bear our nationallyadvertised brand-assurance of built-in reliability and instantbuyer response.

Put the two together-competitive price and nationally knownbrand name. It's the perfect combination to increase your batterysales and profits. The new Sonotone dry cell batteries are justin time for the holiday selling season. Contact your Sonotonedistributor today.

SONOIONE CORrELECTRONIC APPLICATIONS DIVISION. ELMSFORD. N. Y.

cartridges needles speakers tape heads, mikes . electron tubes batteries hearing aids



- LETTERS1/4 TO THE EDITOR

time to time and keep us up-to-date onFCC Laws and Regulations.

ROBERT E. LAWSON

Walker AFB, N. M.

Let's see what other ET readers thinkabout this-Ed.

Job Evades Technician

Editor. ELECTRONIC T I ( I IN ICIAN :

I have four years experience in mili-tary radar electronics, and experience intelevision servicing and electrical wiring.In spite of this. I cannot find employ-ment. I have written numerous com-panies, and they either say I have thewrong kind of experience or they don'tneed me. I have an excellent record forthe experience I have, including a mili-tary supervisor's letter of recommenda-tion.

I have a straight "A" record for maththrough one year of college. I took atest when I finished high school whenbeing considered for engineering schoolby an electric utility company. Theyrecommended that I get into research-but didn't say how.

I often read about a shortage ofelectronics technicians, but I find itdifficult to believe. I am wondering ifI made a mistake in getting into theelectronics field . . . If my experience isinsufficient, I feel sorry for the "greenhorn."

WILLIAM B. BRUBAKER

Iowa Park, Tex.

Needs Marine Instrument Specs

Editor. ELECTRONIC TECHNICIAN:We have a complete electronics serv-

ice department, three technicians, andrepair anything in the electronics field.We have always experienced difficultylocating schematics for marine radio-telephones, fathometers, engine syncunits, radio direction finders, etc. Anyinformation along these lines would beappreciated.

GORDON F. FREEMAN

Bradenton, Fla.

Write to the equipment manufacturerfor schematics and service data. If youdo not receive it please let us know.-Ed.

Disagrees With O'Kelley


I have read your fine November issueand ET ViEWPOINT with interest. I

can't agree with Mr. O'Kelley on somesubjects. I think the Distributors have

you have this now .

you have this

OSECONDSLATER!

it's a SNAP with CENTRA AB'S NEW FASTATCH® II111-6301 (see next page)

JANUARY 1963 9

SARKES TARZIANSilicon Rectifiers

are first choice among servicetechnicians (according to nation-wide polls)

for good and simple reasons:

SILICON NSCTIFIIIRS

Tarzian 400V and 600V "F" Series unitsin handy Ten-Paks, Doubler Replace-ment Kits, and in bulk

Tarzian 400V and 600V "H" Series unitsin handy Ten-Paks, Doubler Replace-ment Kits, and in bulk

* They are immediately availablefrom distributors throughoutthe nation

* They are "handy -packed" inthe quantities and sizes youneed most

* Their proven quality and de-pendability eliminates callbacksthat waste your time and profits

A free Tarzian "ReplacementLine" catalog is yours for theasking. It's your guide to re-placement rectifiers with com-petitive prices, unsurpassedperformance.

Write or call your nearestTarzian distributor, or:

SILICON NIIICTIPIIIRS

Tarzian's nine stand-ard tube replacemertrectifiers replace over95% of all vacuumtube rectifiers

Tarzian M-500 andM-150 units in Conver-sion Kits and in bulk

Tarzian's f our "con-densed stack" sele-nium rectifiers fitsmall -size, high -efficiency applica-tions

SARKES TARZIAN, Inc.World's Leading Manufacturers of TV and FM Tuners Closed Circuit TV Systems Broadcast

Equipment Air Trimmers FM Radios Magnetic Recording Tape Semiconductor Devices

SEMICONDUCTOR DIVISION BLOOMINGTON, INDIANACanadian Licensee: Marsland Engineering Limited 350 Weber Street North, Waterloo, Ontario


LETTERS\ TO THE EDITOR

done a great job but have brought onsome causes for their failures. And theyhave hurt the service man by sellinggoods over the counter to anyone atwholesale prices. They even place largesigns on the front of their business stat-ing that they sell to anyone at wholesale.Now this has hurt us service dealersjust as much as the drug store tuberacket-not only the drug store but de-partment store, hardware, grocery, andwhat -have -you stores. All have donetheir share in hurting service technicians.Some of the wholesale firms haveserved me well and I have good friendsamong them. Some have not served meso well.

Auto repair cannot be compared withTV -radio service. Here is what I mean.I was called on to repair a TV set thatwas dead. After replacing the fuse andchecking for shorts, I made out a bill for$5 for service, and 15 cents for a fuse. Ihanded thi bill to the customer and leftwith a satisfied customer behind. Onanother call I noticed the fuse wasmissing from the set. After looking forsome time around inside the cabinet, Istarted looking on the floor. There wasthe fuse-at the edge of the carpet. Oneof those lock -in fuses had come loose andbounced out without being noticed. I re-placed it, handed the customer a bill for$5 service, and left with another cus-tomer happy. Sometimes, though, a manspends quite a bit of time on a call andgets $5. What has he made? He mustsell some tubes to come out even.

I for one do not believe in serviceassociations. They usually end up dis-criminating against the little man. Theywould be all right if run properly.

I don't think the profit on picturetubes is too high. I get from $5 to $7.50for installing one. I would like to hearfrom some of your other readers on thesubjects mentioned here.

0. R. HAYS

Sunnyvale, Calif.

Can Anyone Help?

Editor. ELECTRONIC TECHNICIAN:

I am strictly a Marine and IndustrialElectronics technician. I have worked onabout every type of radar-commercialand government. I am a graduate of Ft.Bliss Surface to Air Missile School . . .

I would like to know the name andaddress of the manufacturer and obtaina schematic for the cathode ray tubechecker, marked "Hollywood InstrumentCo.. Model CRT -5A."

JOSEPH D. GUILLORY

Metairie, La.

Can any reader furnish info on thisequipment?-Ed.


Now in stock at your distributor

THE NEWFASTATCH° IIFROM CENTRALABGIVES YOU completeinstant exact replacement con-trol coverage for dual concentric,single, and matched twin controls.

Fastatch II gives you convenient andsimple control assembly. Any controlcan be permanently assembled in seconds-no shaft cutting-no complicatedalignment-no twisting. Just snaptogether and install. Your Fastatch IIproduct will be identical to the manu-facturer's original control. Check theseFASTATCH II features:

No shaft cutting ... Exact replacement shaftsare available for every application regardless oflength or termination.

Shaft won't loosen or pull out-permanentlocking construction.

Universal terminals replace all three typesof printed circuit , wire -wrap and hole typeterminals.

No backlash on duals and twins.

B63C8

THE ELECTRONICS DIVISION OF GLOBE -UNION INC.

902A East Keefe Avenue Milwaukee 1, WisconsinIn Canada: Centralab Canada Ltd., P.O. Box 400, Ajax. Ontario

NEW FASTATCH® IIFRK-IOO KITEverything needed to assemblean infinite variety of controls inseconds. 36 assorted front and rear controlsin the 27 most popular resistancevalues 40 universal shafts 8switches Current cross-referenceguide Heavy -gauge steel cabinet.

- - - for more details circle 16 on post cardJANUARY 1963 II

FACTORY SALES OF RADIO AND TV SETS inSeptember were the highest reported for any of the firstnine months of 1962, according to the EIA. Sales ofradios, excluding auto radios, were 1,255,346 units, upfrom the 848,881 units sold in August. TV set salesnumbered 731,100 units, up from the 518,000 of Au-gust. Sales of picture tubes also reached a nine -monthhigh in September, when 866,512 tubes were shippedfrom factories. Sales figures for October will be releasedearly this month.

REVERE CAMERA'S NEW MAGNETIC TAPE RE-CORDER, which can automatically play a stack of upto 20 stereo tape cartridges, will soon be marketed na-tionally. The recorder automatically plays the tape ineach cartridge, rewinds it, drops the next cartridge intoplace and repeats the cycle. Each cartridge containsenough tape for 48 minutes playing time. Revere is asubsidiary of Minnesota Mining and Manufacturing Co.

HIGHLY -SENSITIVE MICROPHONE

DIAPHRAGM -

BASECONTACT

EMITTERCONTACT

TRANSISTOR

FORCE

0.001"RSAPPHIRE

BASECONTACT

BASE EMITTER COLLECTOR COLLECTORCONTACT

Bell Telephone Laboratories has announced a new type of microphonethat acts as its own amplifier and is supposed to be at least fourtimes more sensitive than the carbon telephone transmitter (the mostsensitive microphone now in use). The new microphone uses noelectromagnetic coils or carbon granules. Its main parts are a dia-phragm, a sapphire stylus and a 'unction transistor. Acoustic energyis funneled through the diaphragm to the stylus, which transmits varia-tions in pressure to the emitter surface of the transistor.

"We're having a little trouble fixing your color set. Would you settlefor three shades of gray?"

THE FUTURE OF THE SPEAKER industry looks"grim indeed" unless it develops products and programsbetter to serve its markets and takes steps to lift loud-speaker quality, William H. Bingham, of Hawley Prod-ucts Co., told the EIA Fourth Loudspeaker IndustryConference recently. He said the current industry de-bate over a system for measuring and rating loudspeakerquality has laid bare three very important industry weak-nesses: (1) lack of adequate testing equipment and faci-lities; (2) standard testing procedures; and (3) standardsfor measuring sound quality.

SYNCOM, TO BE THE FIRST HIGH ALTITUDEsynchronous communications satellite, is undergoingfinal testing in preparation for launch early this year.Built by Hughes Aircraft Co. for the National Aero-nautics and Space Administration, the satellite will gointo an orbit 22,300 miles above the earth. At thisaltitude, the spacecraft's speed will match the speed ofthe earth's rotation, so Syncom will appear to hoverabove the earth giving uninterrupted service 24 hoursa day. Hughes engineers are currently working on an


advanced Syncom which will have the capability ofcarrying 1200 two-way telephone channels or four TVchannels.

TWO NEW COMPACT TRANSISTORIZED TVCAMERAS for closed circuit applications, have beenannounced by GE. Both models are 111/2 in. long and51/2 in. in diameter, and weigh only 10 lb. The cameras'circuits are completely transistorized except for thevidicon pickup tube and a single sub -miniature tube inthe video input section, according to the company.Video performance of the models TE-14 and TE-15include center horizontal resolution of 650 lines, mini-mum; usable picture with scene brightness down to two -foot -lamberts; and high stability from regulated criticalvoltages and transistorization.

RADAR FOR SMALL CRAFT to detect landmarks,buoys and other vessels from as close as 30 yards outto 12 miles is being unveiled by Raytheon at the NewYork City Boat Show. The indicator unit uses a 7 -in.picture tube and weighs 43 lb. It can be installed face

RCA GETS NATESA AWARD

RCA recently received the NATESA Friends of Se -vice ManagementAward from Irving J. Toner, left, president of NATESA. The award,which cited RCA for "outstanding service in creating better customerrelations," was accepted by Douglas Y. Smith, vice president andgeneral manager of the RCA Electron Tube Div., and W. Walter Watts,and RCA group executive vice president

CALENDAR OF EVENTSJan. 21-24 9th National Symposium on Reliability and Quality Con-

trol, Sheraton Pala:e Hotel, San Francisco, Calif.Jan. 30 -Feb. 1 4th Winter Convection on Military Electronics, Ambassa-

dor Hotel, Los Angeles, Calif.

Feb. 4-10: Western Electronic Week, Shrine Exposition Hall, LosAngeles, Calif.

Feb. 7-10: Pacific Electronics Trade Show, Shrine Exposition Hall,Los Angeles, Calif.

Feb. 18-20: American Standards Association, Biltmore Hotel, NewYork.

up, vertically on a wall or inverted for overhead view-ing. No complex waveguide is required to interconnectthe indicator and antenna. Cost of the unit is less than$2300.

BECAUSE OF THE TREMENDOUS GROWTHof CB radio in recent years, the FCC is preparingseveral rule changes which it hopes will better regulatethe service. In 1962 alone, a total of 170,000 CBlicense applications were received by the FCC. Thus,the FCC feels it must tighten regulations to preventthe service from rendering itself useless. Some of theproposed changes are the shortening of time limits onconversations; prohibiting conversations concerningtechnical performance of equipment; communicationsto "any stations that might be listening"; and generallyto spell out citizens band regulations by going intodetail rather than rely upon general rules, which forthe most part, now regulate CB.

DUE TO TECHNICAL DIFFICULTIES encounteredduring pilot production, RCA's Electron Tube Div. willbe unable to deliver its new 90 -degree round color pic-ture tube as a commercial product this coming springas originally planned. The notice, given to TV set manu-facturers in December, said it will be another 9 to 15months before reliability goals set for the new tubecan be met. The 90 -degree tube would considerably re-duce the depth of color TV sets, which up to now usea 70 -degree version.

THE FCC HAS SET APRIL 30, 1964 as the cutoffdate, after which all TV sets shipped in interstate com-merce, must meet the all -channel UHF requirements.

JANUARY 1963 13

For Every ElectricalProtection Need

there's a safe anddependable BUSS orFUSETRON Fuse!

BUSS fuse engineers have consistently pio-neered the development of new fuses to keep pacewith the demands of the Electronic industry. To-day, the complete line includes:

Single -element fuses for circuits where quick-blowing is needed;-or single -element fuses fornormal circuit protection;-or dual -element,"slow -blowing" fuses for circuits where harmlesscurrent surges occur;-or indicating fuses for cir-cuits where signals must be given when fuses open.Fuses range in sizes from 1/500 amperes up-and there's a companion line of fuse clips, blocksand holders.

Save time and troubleby furnishing only BUSS fuses

It's more convenient to stock one line of fuses-stock handling, records and inventory problemsare simplified. The unfailing dependability ofBUSS fuses protects you against "kicks" or call-backs that might otherwise result from faultyfuses.

For more information, write for BUSS bulle-tin SFB.

BUSS: The complete line of fuses andfuse mountings of unquestioned high quality.

BUSSMANN MFG. DIVISIONMcGraw -Edison Co.St. Louis 7, Mo.

14

for more details circle 14 on post card


,r ;WV": -11,59 I 77F.

)7V

VII-1 '7. II

t MANUFACTURERS TECHNICAL DIGEST-.s -:.:Zis.:.;7iii.;;; IAt

'1

EMERSON

661 ticaitaltfRal1 URI NA PINIAll

Multiplex Chassis 471362 -Field Alignment

In the absence of stereo generator equipment inthe field, the following procedure is recommended,and should be used only in instances where replace -

SW -1MONO -STEREO

SNITCH --

FOR PROPER CON-NECTION OF INPUT IOUTPUT CABLES,REFER TO THESERVICE NOTESFOR MODELS US-ING THIS MuLTI-AL ET CONVERTERCHASSIS.

LEFT CHANNEL AUDIOOUTPUT CAOLEIORANGEI

RIGHT CHANNEL AUDIOOUTPUT CASLEIBLuEl

0S -IA

AC SOCKET

fLout? 4IL E T SIGNAL

i14Pur CABLE

fa

P -1AAC PLUG

L-2

AT KGTRAP

L-1 (4)R-8

3111,C sEPARTONCOIL CONTRA

E.TERNAL SKAFFATERMINAL HIRES

POWER,RNSTORWR

Tube and alignment point locations for Emerson Stereo MultiplexChassis 471362.

ment of signal -carrying coils or transformers has beenperformed, or where the need for re -alignment has beendefinitely established.

1. Set audio signal generator at 67 Kc and alignL-2 (67 Kc trap) for minimum scope output at thejunction of C-9 and diodes X-3, X-4.

2. Inject a crystal -controlled or calibrated 19 Kcsignal into the input of the adaptor and adjust top andbottom of T-1 and top of L-1 for maximum indicationon scope.

3. The separation control is best adjusted by usinga transmitted signal known to be modulated in only onechannel. Connect the multiplex unit to the stereo FMtuner and the stereo audio amplifier and adjust theamplifier's audio balance control to give output onlyin the channel which should be silent. The separation

RSEI3 IkeNVV

.1)

control (R-8) should now be adjusted for minimumsignal in the unwanted channel.

GENERAL ELECTRIC

TV Chassis M597 Receivers -Tube Chart Error

Early sets in the M597 line have two errors in thetube location drawing on the cabinet back: At thebottom of the diagram is a reference to 5U4GB tube.This tube is not used but is replaced by silicon recti-fiers. The 6EW6 3rd IF amplifier should read 6CB6.These errors have been corrected on later models.

MAGNAVOX

70-01 FM Multiplex Adopter -Reduction of Background Noise

70-01 FM Multiplex Adapter -Reduction of Back-ground Noise R24 has been changed from 33K to 100Kto eliminate background noise. Chassis incorporatingthis change are stamped 70-01-20.

PHILCO

TV Chassis 13020-Varister Damping

The varistor is a special fuse -resistor in the semi-conductor family that decreases in resistance as thevoltage appearing across it increases and vice -versa.This unique characteristic is used to: (1)-limit themaximum vertical pulse amplitude before applicationto the vertical output transformer, and (2)-adjustvertical drive to compensate for slight component value

TOVcgy

C50.047

P53701(

VO:T

VERT CALOUTPUT

VR 511SIZE

CONTROL

BA BOOSTCIRCUIT

R245 MEG

I

C2I047

R39VARIS TOR

+I35v

The vertical size compensation circuit used in Philco 13G20 chassis.

JANUARY 1963 15

+MANUFACTURERS

TECHNICAL DIGEST

changes which occur as the set warms up.The first of these functions, that of pulse limiting,

is needed to prevent damage to the vertical outputtransformer caused by the extremely high amplitudevertical spike. It is accomplished as follows:

During pulse time, capacitor C21 connected to theplate of the vertical Varistor resistance decreases caus-ing the capacitor C21 charging current to increase.Hence, the vertical pulse amplitude is reduced (damped)by the capacitor C21 and varistor R39.

However, during the time between pulses just thereverse situation exists. The potential appearing acrosscapacitor C21 and varistor R39 is low. This low poten-tial then causes the varistor resistance to increase. Hencethe effect of the capacitor C21-varistor R39 shuntpath is lessened resulting in no appreciable loadingor damping of the sweep voltage during line time.

WEBCOR

Model 2250 Tap. Recorder - VU Meter Adjustment

The following procedure should be used to adjustthe VU meter on this model: Remove the control knobsand control escutcheon assembly. Connect an audiosignal generator to "Mic Input Ch. 1" jack (J2). Turnthe tape recorder on and adjust vol. 1 control to atleast 3/4 of full clockwise rotation. Depress "RightRecord Safety Lock" and move slightly to the right tolock in place. Rotate the "Monitor" control fully clock-wise. Connect an a -c VTVM with at least 11 Mohmsinput resistance to "Ext. Amp. Ch. 1" jack (J5). Turnthe meter selector control to "Ch. 1." Adjust the signalgenerator for 1000 cps and approximately 2 on theVTVM. Adjust the meter level control (R-28), on themechanism chassis, until the VU meter reads 100 per-cent (0 db). Replace the control escutcheon assemblyand the control knobs.

WESTINGHOUSE

TV Chassis V -2438-14.w Vertical Circuit

A 17JZ8 compactron is used as a plate -coupledmultivibrator in the V-2438 chassis with one part of themultivibrator serving as the output tube. The deflectionyoke used in the chassis is not "saddle" wound as mostyokes are. It is "toroid" wound.

The saddle wound vertical winding provides an L toR ratio of about 1 to 1 while the toroid vertical windingprovides a higher ratio of about 2 to 1. By using a toroidtype of winding, the higher L to R ratio makes thevertical winding less sensitive to heat. This in turneliminates the previously -used thermistor across thevertical winding.

To provide a certain amount of fixed bias for the

Method used to wind a toroidal coil.

TO GRID OFVERT. DISC.

TO GRID OF1-10RIZ. OUT.

R318150

V3BVERT.OUT

R3206.8M

R 319330K

T300

B+140V

BRIGHTNESSCONTROL

Vertical output circuit used in the Westinghouse V-2438 Chassis.

vertical output tube, one side of the vertical linearitycontrol is connected to the grid of the horizontal tube.This bias makes the vertical output signal free fromchanges in amplitude and linearity when the verticalhold control is varied.

A 330K resistor and a .1 id capacitor filter the14,750 component from the bias voltage.

"This little model tests volts, ohms, capacity, reactance, inductance,decibels, selenium silicon rectifiers, silicon and germanium diodes, hasa built in signal generator and makes a good pot of coffee."


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\MIMI Foolproof, simple, rugged TRANSCEPTOR was de-signed especially for the fifteen million multiple -set owners inthis country. Now, with easy -to -install TRANSCEPTOR, theycan run any combination of TV and FM sets-two or more, oneat a time or all at once - off one antenna without amplification innormal signal areas. And, because TRANSCEPTOR uses elec-tro-magnetic pick-up instead of resistance splitting of the signal,the line is not cut, there is minimum signal oss, and better set-to -set isolation.Result: More customer satisfaction. More sales. More profits.

* * * INDIVIDUALLY PACKAGED ON SELF $ 98 la AR0GAp CORPORATIONMERCHANDISING COUNTER DISPLAY CARDS. RETA 1680 NORTH VINE S-REETAVAILABLE FROM YOUR LOCAL DISTRIBUTOR LOS ANGELES 28, CAL FORNIA

INSTALLIN

SECONDS

JANUARY 1963


17

ways toincreaseyour

incomeRCA Institutes, Inc. offers these four compre-hensive home study courses especially de-signed to help build your income immediately!

CDCOLOR TV Add Color TV Servic-ing to your skills with this up-to-the-minute home training courseand take advantage of the growingprofit potential in this area! Trainunder the direction of RCA ...ex-perts in Color TV.

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TRANSISTORS You get the nec-essary background for semiconduc-tor technology including character-istics of tunnel diodes, rectifiersand other solid state devices.Trar-sistor trainer also available.

41

MOBILE COMMLNICATIONSTrains you to service and main-tain 2 -way radio communicationson land, sea, and air! Gives youthe technical foundation for spacecommunications!

Take advantage of RCA's Liberal Tuition Plan. You only pay forlessons you order; and have no long-term obligations. Licensed byNew York State Education Department. Approved for Veterans.

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CANADIANS-Take advantage of these same RCA courses at no additional cost.No postage. No customs. No delay. Send coupon to: RCA Victor Company, Ltd.,5581 Royalmount Ave., Montreal 9, Quebec.==========

AUDIONEWS LETTER

REEVES SOUNDCRAFT CORP. reportedly broke allexisting sales records for a single month, in the month ofAugust. Sales were $753,000, despite the fact that August istraditionally a period of low sales.

THE PILOT RADIO CORP. announces that Liberty MusicShops has consented to refrain from using the Pilot trademarkand name to advertise, promote or sell products other thanthose manufactured by the company. The judgment perma-nently restrains and enjoins Liberty from misleading advertis-ing involving Pilot. "We believe in strong support of our deal-ers, and we are extremely pleased with the result," Roland J.Kalb, Pilot vice president and general manager said.

BENJAMIN ELECTRONIC SOUND CORP. reports thatMiracord sales for the 10 month period ending October 31are almost double the sales for the entire 12 months of lastyear. Full year's volume is expected to be 21/2 times the 1961volume.

JENSEN INDUSTRIES offers a new counter display cardfor the CRA-55XD diamond needle. The display card, inebony and gold, is designed to help dealers call attention toa new lower price for the monophonic/stereo needle.

AMERICAN GELOSO ELECTRONICS introduces a newimproved model of the Unicorder 61. Signal-to-noise ratio hasbeen reduced to a low minimum and the power output in-creased to 350 mw. A tone compensation circuit is also addedto equalize tone to different speeds. The fast forward speedhas been increased and an input circuit added to accommodatea remote stop/start foot pedal.

ELECTRONIC INDUSTRIES ASSOCIATION'S RADIOSECTION announces that Gary Gielow and James Gabbert,two young San Franciscans with a successful reputation inFM stereo radio, appealed to the nation's receiver makersyesterday to lend a hand to the more than 70 percent of thecountry's stereo broadcasters now losing money. Stereo's fu-ture is "absolutely unlimited," agreed the co -owners of SanFrancisco's stereo station KPEN-FM, in a joint presentationbefore the EIA meeting.

EICO introduces the HFS-6 speaker system which can beeither wall -mounted or placed on a narrow shelf in any de-sired location above room furniture when required.

SYLVANIA ELECTRIC PRODUCTS announced six newstereo HI FI phono's at a regional meeting of eastern distribu-tors. The stereos include three consoles featuring built inAM/FM stereo tuners, and three portables. Sets feature alightweight arm that exerts less than one -tenth ounce pressureon the record.

EUPHONIS CORP. of Puerto Rico releases a new stereoceramic cartridge series, the "Orbit Action" U-8 and U-9. Theyreplace all types of ceramic cartridges, and have dual styli forplaying stereo and monophonic records, including 78 rpm's.


Do you recognize this high-performance TV Chassis?Its design was made possible by the use of 11 Amperex tubes

16AQ3DAMPER

IT IS USED IN EIGHTEEN DIFFERENT CURRENT MODELS I

27GB5HOR. OUTPUT

15CW5AUDIO

OUTF UT

9A8SYNC. &

HOR. OSC.

9A8VERT. OSC.

& SOUND IF

15CW5VERT. OUTPUT

9A8AGC

4GK5RF AMP

7HG8MIXER OS(

If you can give us the manufacturer's name and chassis number

you can win one of 10 model 23K95 Motorola Consoles

TURN PAGE FOR LINEUP OF AMPEREX TUBES ANDOTHER CLUES AND SIMPLE DETAILS OF CONTEST

These 11 Amperex tubes are found in thefamous TV chassis shown on the reverse side of this page

SYNC.

& HOR. OSC.

41

& SOUND IF AGC

MIR

L .tir I

II II )111,

DAM ER

HOR. OUTPUT

OUTPUT

Additional Clues:Chassis uses total of 14 tubes plus 19' CRT and 4diodes in wired circuit.Manufacturer is famous Chicago producer of automo-bile radios as well as TV and Hi-Fi.Suggested Reference Sources: "Previews of New Sets,"PF Reporter, February, 1962; Sams Photofact FolderSet No. 577, May, 1962; December (1962) CircuitDigests, Electronic Technician.

.421'4:1-

11111

111

10 Motorola TV Consoles and 100 Additional Valuable Prizesto be Awarded in First of Amperex Telequiz Sweepstakes!

1 Fill in attached entry card (or official entry card availablefrom your distributor) with all information requested.

9 Remove card from magazine and mail. No postagenecessary. Entries must be postmarked by January 19and received by January 25, 1963. All entries withcorrect answers become eligible for drawirg of prizeson January 28, 1963 in the offices of and under thesupervision of the D. L. Blair Corporation, independentcontest managers.

3Telequiz Sweepstakes subject to Federal, State andLocal laws and regulations. Winners will be notified nolater than January 31, 1963.

Contest limited to TV service dealers and technicians.

Are you replacing top quality tubes withYou can now carry the identical tubes that you find in mostof the quality TV sets you're servicing.

For some time now, designers have been using manyAMPEREX Frame Grid tubes in their quality TV chassisand we can tell you now that even more tubes originatedby AMPEREX are being designed into more of the setsyou'll be handling from now on.

We have decided that the simplest and most direct way

Amporox Were`

ELECTRON Ea`'"_

TUBES11°5

for over

identical top quality tubes? Now you can!to bring this important information to you is through aseries of interesting 'Telequiz' Sweepstakes Contests,with the world's most fabulous TV consoles ever builtawarded as prizes.

If the Contest Reply Card has been removed before thismagazine got into your hands, your AMPEREX distributorwill provide you with an official reply card for your ownuse. Good luck and good servicing!

Amperex Electronic Corporation, Hicksville, Long Island, N. Y.

FREE! ATTEND THE 1963 CAR RADIO SCHOOL IN YOUR AREA!simply say DelcoHere's your chance to learn about the all -transistor 1963 car radios,including the new AM -FM models. At the free 3 -day Delco RadioTraining School soon to be held in your area, our engineers willteach you transistor fundamentals through interesting lab experi-ments. You'll learn voltage meanings. How to test Wonder Barcircuits and transistor portables. How to troubleshoot the newAM -FM car radios! Don't miss this opportunity to pick up theknowledge that'll make servicing the 1963 car radios a breeze.Be sure to check the schedule below. And to register for thisschool, see your United Delco distributor. Or contact ServiceManager, Delco Radio Division, Kokomo, Indiana.

C1113110tCrlo to,rooms

-

I

1963 Service Bulletins Now Available!

These service bulletin packs which describethe servicing cf all 1963 GM car radios in detailare currently the only source for this informa-tion. You can get them through your distributor.Call him today

3 -DAY CLASSESBEGIN

JAN. 14EAST

DELCO RASOUTH

0 ELECTRONICS SCHOOLCENTRAL

SCHEDULEMIDWEST

CHICAGO

SOUTHWEST WEST

DETROITJAN. 21 SALT LAKE CITYJAN. 26 MEMPHIS CINCINNATI DALLAS (N)FEB. 4 MILWAUKEEFEB. 11 CLEVELAND HOUSTON (N)FEB. It BOSTON ATLANTA LOS ANGELESFEB. 25 PITTSBURGH ST. LOUIS (N)MAR. 4 UNION, NY (N) KANSAS CITYMAR. 11 JACKSONVILLE SAN FRANCISCOMAR. 111 PHILADELPHIA OMAHAMAR. 215 DENVER PORTLANDAPR. 1 TARRYTOWN. NY NEW ORLEANS BUFFALOAPR. 9

APR. 15 MINNEAPOLISAPR. 22 BOSTON EL PASO (N) LOS ANGELESAPR. 29 CHARLOTTE WICHITA (N)MAY 6 WASHINGTONMAY 13 CHICAGOMAY 20 PHILADELPHIA (N) BUFFALOMAY 27JUNE 3 ALBANY, NY (N)N-Night classes

Delco Radio Automotive Radio Service Parts and Electro-Mechanical Devices are distributed national'y through United DelcoDELCO RADIO, Civision of General Motors, Kokomo, Indiana

-United i#Delco

JANUARY 1963- for more details circle 19 on last page

21

Old New

Now, RCAVICTOR takes the tangleout of TV's toughest circuitry

liAThe advantages of the newRCA Security Sealed ChromaCircuits are plain to see. Thesimple fact that they're PrecisionCrafted Security Sealed boardstells you most of the good news. . . clean; easy to get at; "road -map" tracking, and just gener-ally a cinch compared to theirold, hand -wired counterparts.

This newly developed RCAchroma board sets many morebenchmarks. For example, thecolor bandpass amplifier circuit

operates near Class "A," provid-ing linear amplification ofchroma signals. Color video am-plifier outputs are 100% DCcoupled to reduce drift in colortemperature set-up.

The chroma circuit also fea-tures two new multi -grid pen-tode color demodulators toimprove color with better ma-trixing. No "short cuts"-this isfull -function circuitry...demod-ulators plus amplifiers for extracolor brilliance and stability !

This circuit is very stable, andtube change has almost no effecton performance of matrixing.

The new Precision CraftedSecurity Sealed Chroma Circuitboard is part of RCA's continu-ing program for faster, easierservicing of today's fastest -grow-ing home entertainment me-dium ... Color TV.

See Walt Disney's "WonderfulWorld of Color" Sunday's, NBC-TV Network.

The Most Trusted Name in TelevisionTr711.15)"


ET VIEWPOINT

Are You Ready for '63?Outstanding business and financial experts were

unusually mute this last year-end. The vocal -few spokesoftly and conservatively: "We see nothing on the im-mediate horizon," they said, in effect, "to indicate animportant slide -off in business in the near future." Con-sensus predicts general business activity for the firsthalf of 1963 at or near the average level for '62.

Whatever the future may bring, for TV -radio serv-ice -dealers and technicians, one thing is certain: compe-tition will be keener. Some will not have the know-howand fortitude to continue operations-others will pros-per. Your chances for prosperity will be determinedlargely by what you do and when you do it. Waiting to"see what happens" can be a major step in the directionof failure.

It is not too late to do the important things younever got around to last year. What happened to thatresolution, for example, to organize your customers intoan "auxiliary sales force?" Those who have tried it havere -discovered an old but formidable competition -stop-per. It begins working for you when you begin givingyour cusiomers a little better service for the same dollar.It continues to work for you when you continue withconsistent and courteous treatment. It grows when you

convince your customers by your actions that you aresincerely interested in solving all of their TV, radio andHi Fi complaints. Don't leave the impression that youare eager to take their money and get rid of them.

And how about that decision you made, but nevercarried out, to diversify a little with CB radio? Well, therecords indicate that citizens band equipment sales for1962 will just about double those of 1961. Someservice -dealers and technicians have reported livelybusiness in CB equipment. It may repeat in 1963.

What happened to that rough plan you draftedfor time studies on house calls, pick-ups and deliveries,shop work and other chores, including your own activi-ties? Remember, you were going to beat the competitionby higher over-all productivity through scheduling traveltime, planning the service day in advance, and reorgan-izing the shop for more efficient operation. And that1963 budget? Do you have it ready as a plan, a guide,a control-designed to help you achieve your majoraim-a decent profit-for the new year? It's a little latebut you can still get under the wire if you act fast.

If you act now and keep moving you won't havetime to worry about over-all business conditions andthe keen competition in 1963.

Our Stake in UHFThe Federal Communications Commission has fin-

ished preliminary tests on channel 31 in N. Y. City.The report reveals few, if any, technical facts thatwere not already known. UHF compares favorablywith VHF and will take care of the nation's tele-casting job. With simple outside antennas UHF provedto be better than VHF under certain standards. Withindoor antennas New York's channel 2 and 7 provedslightly better than channel 31, according to the FCC.

Some sources have reported that the FCC foundchannel 31 inferior to VHF 2 and 7. This is, to para-phrase Voltaire, shaping the feet to fit the socks. Butthere is method in this news -distorting madness.

Despite the need for changes, one group wouldlike to maintain the TV spectrum status quo. They havealways argued that UHF is inferior to VHF in mostrespects.

Another group would like to grab a large portionof the UHF spectrum for temporarily solving theirprivate problems. They have a very special argument

which has been handed to them ready-made.Some years ago the FCC authorized and set aside

267 outlets across the country to be used exclusivelyfor educational purposes. Most channels are in theUHF spectrum. Less than 100 of these ETV outletshave been activated-primarily because some back-ward -thinking educators and government officials havenot recognized the dynamic potential of TV for rapidlyup -grading our educational system. So, says the lattergroup, these channels should be released to someonewho will use them!

UHF TV frequencies belong to this nation's news,entertainment and educational systems. VHF TV chan-nels can be moved to the UHF spectrum. Frequenciesfrom 54 to 216 Mc can thus be released. Industrial,business and other vital mobile services need thesefrequencies.

It is the FCC's duty to see that changes in theVHF/UHF regions are made in the nation's best long-range interest.

JANUARY 196323

Two -Way Mobile

Transmitters

Marconi's Model 791D deviation meter.

If it becomes necessary to adjustthe transmitter's modulation devi-ation observe the signal on an FCCapproved modulation deviationmonitor and adjust the speech -level(modulation) control for a maximumof ± 5 kc for narrow -band, or± 15 kc for wide -band units. Inan emergency, another radio re-ceiver can be used for approximateadjustment.

After making frequency and mod-ulation checks, the next step is tocheck the multiplier stages. To checkoperation of these stages, take read-ings at J103, 4, 5, and 6 (Fig. 1)

with a VTVM or a metering testset. If no reading is obtained at anyof these jacks, trouble is probablycaused by a blown fuse or failurein the power supply. If readings areobtained that do not agree withthose called for in the set's servicedata, the trouble is probably in thestage feeding the grid at which anincorrect reading appears. Referringto Fig. 1, if a proper reading ap-pears at J103 #4, but a low read-ing is indicated at #5, V103 triplerstage is weak.

Power Amplifier ChecksTo check the power amplifier

stage, connect the meter from J103#7 to J103 #8. Normal plate cur-rent is about 0.15 amperes as indi-cated by a reading of 1.5 v. Lowervalues may be caused by low plate

Continued

DuMont's Fairco Mark Ill frequency metercovers citizens and commercial mobile bands.

voltage, a defective tube, improperantenna loading, or insufficient griddrive. To check the power ampli-fier's plate voltage, set the meter onthe high range, connect the negativemeter lead to the chassis, and thepositive head to J103 #7. The metershould read 400 v or better. To cal-culate power input to the final stagein watts, measure the final amplifierplate current and plate voltage; useohms power law, P=EI, to obtainappmximate input.

Transmitter AlignmentThe first step in aligning a two-

way radio transmitter is to peak the1st tunable coil in the frequencymultipliers. In Fig. 1 this would bethe first doubler (T1). This assumes,of course, that the transmitter's os-cillator frequency is known to be ac-curate.

While observing the meterplugged between J103 #4 andground, key the transmitter on and(with the tune -operate switch in thetune position) adjust the primaryslug from the transformer bottom,for a maximum reading. Adjust thesecondary slug from the transformertop for a maximum meter reading.Now repeak the primary and sec-ondary for maximum meter read-ing. The circuit is tuned to twotimes the crystal frequency.

When tuning a two -frequencytransmitter, it should be aligned on

Motorola's two-way mobile test set, 5-1059A,has built-in transistorized deviation meter.

the higher of the two frequenciesemployed. On completion of align-ment, each output should bechecked for proper performance.In specific cases where channel sep-arations exceed 120 kc, and the low-er frequency is used more often thanthe higher, it is preferable to alignthe unit on the lower frequency.

The next step in alignment is ad-justment of the tripler (V103) stage.This stage multiplies the 1st doubleroutput frequency three times (6times the crystal frequency). Againkey the transmitter on and meterJ103 #5 and adjust the primaryslug of this stage from the trans-former bottom (T2) for a maximummeter reading. Adjust the secondaryslug from the transformer top fora peak meter reading. Repeak theprimary and secondary.

After obtaining a satisfactorytripler reading, meter J103 #6 andadjust the primary and secondaryslugs of T3 for maximum reading.This indicates that V104 is workingproperly. You will notice that whilemetering J103 #6 with the trans-mitter off a slight meter reading willbe present. This is a fixed bias volt-age designed to prevent the poweramplifier from "running away"should the final amplifier plate volt-age be applied with no drive fromthe double -driver V-104 available.If the transmitter is turned on witha dead stage preceding the final am -


plifier, the amplifier tube may welldraw too much plate current and bedestroyed. As long as drive is avail-able, the bias is not utilized and ismerely a safeguard. Since this biasis present on the final grid at alltimes, it must be taken into con-sideration when tuning. Properalignment of T3 will be indicatedby a definite peak on the meter.

To align the power amplifier(V105) insert the positive probe ofthe meter in J103 #7, and the neg-ative probe in #8. Key the trans-mitter on and adjust antenna trim-mer capacitor C-121 counter -clock-wise for minimum coupling as indi-cated by a minimum meter reading.Turn the output coupling adjust-ment of L-2 counter -clockwise todecouple the dummy load, and ad-just the power amplifier tuning cap-acitor C-120 for a "dip" (minimumreading) on the meter. When themeter has been dipped, place the

IVAN, Yr P411....4,0`..

tune -operate switch in the operateposition.

To align the output circuit, adjustthe amplifier plate circuit couplingto the RF load by turning antennatrimmer C-121 until a maximumreading has been obtained on themeter. Couple the RF plate circuitto an RF wattmeter or a dum-my load (50) ohms capable of dis-sipating 30 w). Couple the am-plifier plate circuit to the antenna(or dummy load) for desiredRF output by turning coupling ad-justment L-2 clockwise until thetransmitter is loaded to the desiredRF power output as indicated on thewattmeter. (Do not exceed 125 xriaplate current on the final while mak-ing these adjustments. Also, neverallow the final to operate with morethan 125 ma at any time, as thiswill shorten tube life.)

Readjust the antenna trimmercapacitor C-121 for a reading ofabout 30 w.

Now connect the antenna used innormal service to the set's antennaconnector. Turn the coupling ad-justment clockwise and adjust theamplifier's tuning capacitor C-120through resonance. (Resonance isindicated by the lowest dip in themeter reading.) Now gradually in-crease the coupling to a point wherethere is only a slight dip in meterreading when tuning through res-onance. This will indicate the pointof maximum output.

If the transmitter is overcoupledto the antenna the plate current dipwill disappear and actual power out-put will be below maximum value.Also, a false dip may occur whichwill not be coincident with maxi-mum radiation.

To ascertain the correct point formaximum power output and bestefficiency, an RF wattmeter shouldbe used as described in the preced-ing paragraphs.

CB Rules

and Regulations

Part 15 and part 19 of the FCC Rules and Regula-tions are being confused by both buyer and technician.It is strongly recommended that a copy of each be ob-tained from the FCC; in fact, for license holders,reading part 19 is a sworn requirement.

To clarify some of these rules, let's go over a fewimportant points contained in these parts. Part 19 is ofparticular importance; it is sometimes referred to as theCB Commandments. Most of the rules are clear-cut.Others have been mis-interpreted and in some cases,law suits have been brought against the offenders. Itshouldn't be your aim to try to get around these rules,so we will clarify them as law suits, and as certain FCCorders have shown, they were intended. These ruleswill undoubtedly be rewritten in the near future.

Under no conditions is working DX legal. If you'rein Podunck, Fla. and hear an illegal CQ call from

California, forget it. You are not allowed to answeror solicit such communications even though certainskip conditions sometimes make such communicationspractical.

Operating a CB rig during the interim while alicense is pending is not allowed. You must have aposted license anytime you operate a CB transmitter.Part 15 rules deal with limited radiation devices (under100 mw) which do not require licenses but must becertified for proper maximum power.

The use of profane language is also prohibited. Thesame rules which apply to amateur and commercialradio operators apply here. Derogatory or inflammatoryremarks against racial and religious groups are similarlyprohibited.

You may not loan your license to another operator.This is true even if the other operator is licensed.

There is a definite time limit for all CB trans-missions. You must give your call letters at the be-ginning and end of each of these five minute send andreceive periods. After five minutes the channel must becleared. After a reasonable period to allow someoneelse to use the channel, the other party may be con-tacted for another five minute period.

Abuse of these rules will only lead to tighteningof CB regulations which may make it difficult or im-possible for others to obtain a license.

JANUARY 1963 27

Channel Frequency

126.965 mc

2 26.975 mc

3 26.985 mc

4 27.005 mc

5 27.015 mc

6 27.025 mc

7 27.035 mc

8 27.055 mc

9 27.065 mc

10 27.075 mc

11 27.085 mc

12 27.105 mc

13 27.115 mc

14 27.125 mc

15 27.135 mc

16 27.155 mc

17 27.165 mc

18 27.175 mc

19 27.185 mc

20 27.205 mc21 27.215 mc

22 27.225 mc

Transmitter crystal oscillator frequencies fochannels 1 through 22. Channel 23 is a

shared channel operating on the same fre-quency as 22. Receiver crystals are generallycut to 455 Kc higher than transmitter crystals.

CB Transceiver Maintenance

The most likely cause would be afault in the switching circuits atthe antenna input and the trans-mitter tank coil. Normal hiss wouldbe present from the mixer -oscil-lator and power out would be verylow if, for example, a ground werepresent in the coil circuit.

Similar malfunctions are almostas prevalent as receivers. Using thistype of analysis, you should nothave trouble finding the faulty sec-tion. Working on the remainder ofthe receiver should offer no prob-lems to the average technician

which he would not encounter in atable radio. Noise limiting andsquelch circuits are the only addi-tions.

Noise limiters are usually nomore than a simple clipping circuit.

Squelch systems, often manuallyadjustable, frequently operate di-rectly from the AGC circuit. A lowagc voltage causes the squelch cir-cuit to keep audio amplifiers biasedoff until a signal drives the agcabove the present manual level. Sev-eral other squelch systems are used,however. The next most popular

Math Calculationsfor

`Two -Way' Techs111119141/iria:

voltaftwo 4 ege..e 706204es

There is probably no one in thecommunications service field whodoesn't know the significance ofOhm's law and how to use it forsimple calculations. Unfortunately,that is often the full extent of thetechnician's working math ability.Math can make a real problem aroutine matter in many cases. Sosharpen your pencil and see howmany times you could have usedthis information and how easy it is.

Let's see how some commonformulas applicable to transmittercircuitry can be used. Table I

shows the meaning of the textsymbols.

Self inductance can be computedby the same method used for calcu-lating series and parallel resistors.The symbol L is substituted for Rin the formula, of course. To cal-culate the coupled inductance, how-ever, it becomes necessary to knowthe mutual inductance. This is easilyfound from:

L. - L.M -

4

With M known, coupled inductance

is found from formulas very muchlike self inductance formulas: Forseries aiding fields,

1-2 = Le + L. ± 2Mand for series opposing fields,

1,2 = + - 2MParallel calculations follow thesame familiar pattern. With fieldsaiding:

L, =

± M + Mand with fields opposing:

Le =1

-M -MAlthough we've all been through

resonance and reactance formulas.it seems to be the hardest of thepopular ones to keep in mind. Sev-eral different forms of this formulacan be found, but perhaps the sim-plest to remember is:

fr2-rt V i.e

it is frequently necessary to findthe reactance of a capacitor or in-ductor. Reactance is easily foundwith these formulas:

30ELECTRONIC TECHNICIAN

Continued

is tone squelch which keeps thcaudio cut off until a tone resonatesthe squelch circuit allowing audioto pass. Of course, the transmittermust be tone modulated.

The "transmitter -only" portion ofthe receiver is relatively simple andshouldn't trouble the qualified FCClicense holder. The only portion ofthe transmitter section which shouldconcern the non -licensed technicianis the microphone and preamp cir-cuits. These are generally straightforward and likewise, should offerno unusual problems.

WWI

VIA

vieCRYSTAL

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IMPLWItli DCTICTOI

1110

11011° LORIN

TX

MAILS.

reSOWNRIp

V.A1110WPISiar

/44.0100VTIVTmOTLILA TOT

FOR DC OPERATION

1. I VOLT/06Oa

It II VOLTS OC

VIAOMIT&

°WILLITS%

POWER SUPPLY

,COL TDC tornIMPLY

TO CIVIC Illt PLATES

FOR II7V AC OPERATION

VCATS AC

TUN FLASHY "%UGC

To NircT191111...TL8

VTMaCTWKATICII s/q/Liana

Fig. 1 - Block diagram of Heath's GW-12. Transceiver power supplies shown are external andoptional. Switching components are not shown for clar ty One coil is employed for the antenna input and RF tank circuits.

1

?Cr = and X,. = 2 -,7 if.2-rr fC

The Q of a coil or capacitor isoften given in replacement specifi-cations. Finding out how this figureof merit is obtained will sometimeshelp understand complex circuitry.For any inductance, the Q can befound by:

xt,Q = -

R,.

and for a capacitor:XcQ =RI

Wavelength and frequency rela-tionships are often puzzling to thenovice, but as time goes by it's hardto forget. For the benefit of thosewho have forgotten or those whodon't like to interpolate be weenmeters and cm or kc and Mc, theformula for each is given. To findthe frequency (in kc) from wave-length:

or in Mc:

f=

f -

3 10'

Ac

3 10'

A

To find the wavelength from fre-quency, A and f are simply inter-changed for an answer in meters orcm respectively.

Two -wire open transmission linesare rarely used in mobile commu-nications work, but for those ex-ceptions it is included in the fol-lowing formulas for both coaxialand open lead lines.

Attenuation of signal in db per ftof line for coaxial line:

4.6 Vf. (d, d2)db =

d,(d, d2) log -

d2

and for open line:0.0157 R

db =2D

logd

Several other formulas are oftenassociated with transmission line,but characteristic impedance isprobably the most important. Forcoaxial line the characteristic impe-dance is found by:

a,Z = 138 log -

d2

and for open wire lines:

2DZ = 276 log -

d

Mastering these formulas willhelp you to speedier servicingthrough a better understanding ofelectronics.

Table I

M = Mutual InductanceL. = Total Inductance, fields aidingL. = Total Inductance, fields opposing

= Total InductanceL, = Self Inductance of Coil 1Lr = Self Inductance of Coil 2f. = Resonant frequency in cpsL = Inductance in HenrysC = Capacitance in farads

= 3.14LI= Capacitive reactance in ohmsX1 = Inductive reactance in ohmsf = frequency in cpsa = Ratio expressed in figure of meritA Wave length in metersR Resistance in ohms acting in

series with capacitanced = diameter of conductor in in.d, = Inside diameter of outer conduc-

tord. = Outside diameter of inner con-

ductorf,,. = Frequency in McD = Specing between wire centers in

in.R, = RF resistance, in ohms, per loop

2.10- V,ft. of wire. (RF ----)

d

JANUARY 196331

Aside from the pattern effect, theposition of the loading coil greatlyaffects the antenna's strength. Bot-tom loaded coils are most popular,though they are usually incorpo-rated because they are sturdy andcomparatively inexpensive. Themaximum current in the bottomloaded antenna is near the bottom.Since our effort is to propagate thesignal from a maximum height, thisis not the most desirable loadingcoil position.

The top loaded antenna propa-gates the most signal from the tipof the antenna. This is very desir-able. The heavy loading coil locatedat the top of the antenna, however,causes some antenna ridgidity prob-lems and makes the antenna moreexpensive.

The center loaded antenna is acompromise. Its characteristics arehalf -way between the bottom andtop loaded types. Its cost is similarlybetween the others.

Installation

Installation of mobile antennas isprimarily determined by the type ofantenna selected, the vehicle it is tobe mounted on and the preferenceof the user. Manufacturers' instruc-tions are usually quite explicit andshould be carefully followed. A goodground to the base of the antennais a must. Don't forget to scrapeaway the paint around the mountinghole or to clean the surface of un-painted mounts.

Running coax for the antennafeed is usually simplified by follow-ing the route of existing coil wiring.Base station antennas, because theyare fixed, allow the installer to cor-rect for many deficiencies found inmobile installations. A much greaterheight and more rigidity can be at-tained, for. example.

FCC regulations should be con-sulted to determine restrictions formaximum height for the radio corn -

munications to be used. I -or ex-ample, CB antenna heights are re-stricted to a maximum of 20 ft aboveexisting structures. Some installa-tions may be restricted in height be-cause of the proximity of an airport.Others may require special lightsatop the antenna. These regulationsmay be obtained by writing to theFCC in Washington, D. C.

Coaxial antenna runs should belimited to 100 ft if possible. Everyft attenuates the radiated power andthe signal received. If an advantagecan be gained, either better line -of -sight or more height, for instance,the increased length of the antenna'sfeed line may more than compen-sate for the loss.

Special antenna switches areavailable, or they may be made upfrom a coaxial relay to switch be-tween non -directional and beam orbetween different beams. Some sta-tions use a long wire for receiving

Continued on page 62

SALES UP100 mwTRANSCEI

Walkie-talkie type transceivers are enjoying anall-time high in popularity since CB radio became prac-tical. When used with other low -powered units no li-cense for operation is needed and there are no operatingrestrictions.

The range of use for these units is wide; TV techni-cians and antenna installers have found them helpfulin adjusting antenna position, and at the other end ofthe gamut, sportsmen have found them valuable to keepin touch with one another and to quarry game (thispractice is prohibited in some states). Obviously, the

sales and service potential for these units is very great.Technicians with a second class FCC radio -telephone

license are missing a relatively easy -to -learn additionto their income by not selling and servicing these units.Although the markup is not high compared to otherelectronic items, service rewards are good. In mostcases, the only necessary equipment will be a goodVTVM. Crystal control for both transmit and receivesimplify alignment to one or two peaking adjustments.

An example of alignment simplicity is shown bythe instructions in one manufacturer's service literature:

"Connect (a) dc milliammeter in series with thesupply voltage and the units under test. Remove coverand extend the whip antenna to its full height. With ahex type alignment tool turn core of T6 counterclock-wise until core is extended one-half its length from thecoil form. Turn unit on. Press the PUSH -TO -TALKSWITCH to transmit position. Slowly turn core of T6clockwise while observing milliammeter. Continue turn-ing core clockwise until meter reads 22 ma. This com-pletes the adjustment for the transmitter section.

The receiver adjustment is even simpler. A voltmeteris connected to a point in the unit and a coil slug isturned for a peak reading.

It's not too late to get in on the sales of these unitsif you haven't already done so. Transceivers now on themarket range in price from less than $10 to more than$100; within the price range of anyone who can afford apocket radio. It probably won't be too long before theTV and radio technician will be expected to service thisequipment-and almost as frequently as he would atransistor radio.


Druggist Kessler gives instructions from hisprescription department to delivery wagonvia two-way radio.

Many alert TV -radio and indus-trial electronic technicians will findthis story "old hat." Others, withmodest imagination, may find it pos-sible to stretch this single idea intoa thriving two-way radio business.

Some time ago, Paul Kessler,owner of the Village Pharmacy inIrvington, N. J., installed a two-wayradio in his drug store and in hisdelivery wagon. He planned to off-set competition from other drugstores in this area by offering fasterservice. Like many other two-wayradio owners, Kessler is sold on theidea.

Besides the increase in prescrip-tion business which he estimates tobe about 15 percent, the conveni-ence has been well worth the costof installation and maintenance.

"It's a simple matter," Kesslersaid, "to call my delivery man topick up one or more prescriptionsif telephone calls come in while heis out. This has boosted my serviceefficiency and resulted in many newcustomers."

"In addition," Kessler stated, "ifproblems arise while the driver isout, he can call the store for clarifi-cation or instructions."

Since more deliveries can now bemade in less time, Kessler pointedout that his driver can spend moreof his time helping in the store.

This same idea may be applied to

Two -Way RadioSpeeds DeliveriesDrug store up -grades customer serviceand increases prescription businesswith radio communications equipment

4 ri,teevt 5045066

other businesses which feature pick-ups deliveries. It offers possibili-

to enterprising technicians fortwo-way radio sales and service.

A we lanned and sustained pro-m ' al program may turn thetrick. It does not have to be a "bigdeal" oper n. A modest but at-tracti rochure, or a well writtensales letter, can inform prospects oftwo-way radio.....dvantages. Point out

clearly how the system can speeddeliveries, provide continuous con-tact with the delivery vehicle, resultin less mileage per delivery and lessroad time for the driver.

All this adds up to savings in op-erating costs, better customer serv-ice and improved customer relations.

Few salesmen would ask for rich-er business soil or for more fertileseed to sow in it.

Driver receives orders to pick up prescriptions at other locations after making drug delivery.

JANUARY 1963 35

Association of basic faults leads

technicians to trouble spot quickly

ify Sea "New

Loss of sync or weak sync candevelop from trouble in almost anypart of the TV set. Even externalinterference or antenna problemscan cause sync instability. Locatingand correcting such problems re-quires a thorough understanding ofsync pulse composition, its progressthrough the receiver and the set'ssync requirements.

As we all know, the purpose ofthe sync pulse is to synchronizethe receiver's vertical and horizontalscan rates with the scan frequencyemployed in the TV camera. Fail-ure to obtain proper sync resultsin problems familiar to most alltechnicians: Rolling, tearing, pie -crusting or christmas tree effects.Any of these terrorize the noviceTV technician; usually because thefault is not the result of total com-ponent failure.

FIX THAT

But the experienced TV tech-nician has his share of difficultieswith sync systems too. For the mostpart, possibly, from a lack of basicknowledge of the operation of syncamplifiers, clippers or separators,and special noise canceling circuits.And partly, from his disbelief thatthe sync pulse could be weakenedor destroyed in the video portionof a receiver when an otherwisenormal or good quality picture ispresent. Let's try to justify the cau-tions to check the video circuitryfound in almost every text on syncsystem maintenance.

Sync Pulse ConstructionSince both vertical and horizontal

scans must be synchronized by syncpulses, two sets of pulses are re-quired; one at the vertical rate, an-other at the horizontal rate. Both

oscillators are normally set to oper-ate at a slightly lower frequencythan their normal scanning rate.When the sync pulse is applied tothe oscillator, it is "pulled in" tothe proper frequency.

Additional problems arise, how-ever, during vertical retrace timein such a simple system. To preventthe horizontal oscillator from run-ning off frequency, horizontal ratepulses are superimposed on the ver-tical blanking and sync pulse. Inthe absence of these pulses, "hook-ing" or "flag waving" occurs atthe top of the picture.

Interlace is accomplished byequalizing pulses inserted in the ver-tical blanking interval which main-tain the exact starting time for thehorizontal oscillator. A compositedrawing of the sync waveform isshown in Fig. 1.

100% - -BLACK - -- -

LEVEL (75%)

WHITELEVEL

AEQUALIZING SEPERATED EQUALIZING

I I PULSES I VERTICAL' PULSES

SYNC

-t

PICTURE

H H I

14,

3H 1 3H

BOTTOM OF PICTURE

H BLANKINGINFORM

3H

01. H WHEN FIELD ENDS ON FULL SCAN LINE .

0 = 0.5H WHEN FIELD ENDS WITH HALF SCAN LINE .

4141111M

11+1

START OFNEXT FIELD

5.

Fig. 1 - Sync puke structure varies on odd and even scan fields. Equalizing pulses and the serrated vertical sync pulse maintain proper hori-

zontal oscillator frequency during vertical blanking and sync time.


SYNC TROUBLE FAST

Since all of the pulses during thevertical blanking time are the sameamplitude, an integrator is used toselect the proper time for the verti-cal oscillator to begin. Equalizingpulses are too short to allow the in-tegrator to develop a charge of suf-ficient amplitude to trigger the ver-tical oscillator. The vertical syncpulse is serrated, forming pulsesabout twice as wide as the equal-izing pulses which allow the inte-grator to charge. When the properlevel is reached at the integratoroutput, the oscillator begins con-duction.

To maintain a perfect odd -linerelationship between vertical andhorizontal scans to allow interlacethe sync pulses are generated froma common oscillator with dividercircuits feeding separate sweep os-cillators. This is illustrated in Fig

2. Since the relationship for 60 cpsscan is odd (525 horizontal linesper frame) every other field is thesame length; alternating between262 and 263 scan lines. Each frameis composed of two interlaced fields.

TroubleshootingNow, where does this informa-

tion get us? It simply shows howcomplex a simple process can be.And what critical set areas to lookat when a particular sync troubledevelops. For example, supposepoor interlace (line pairing) is aproblem. Where do you look? Weknow that the timing sequencewhich regulates the odd -line rela-tionship between the horizontal andvertical scan rates causes interlace.Assuming the ratio at the stationis normal, one of the triggeringcircuits in the set is at fault.

Fig. 3 (A) - Anti -hunt components R,,C,, and C, should besuspected if pie -crust-ing is found. (B) -In pulse width detec-tors, the anti -hunt cir-cuit components areR,, Co Co and

f °

MASTEROSCILLATOR

31.5 K C : 120

15,750 CPS

262.5 CPS

Fig. 2 (A) - Exact odd -line relationship between vertical and horizontalrates as maintained by divider circuits from a common oscillator. Oddratio between rates causes scan to end on a half line on one fieldand a full line the next field. (B) - Beginning and end points of thehalf -scan line field. (C) - Beginning and end points of tha fieldpreceeding or following the half line field.

Basically, only one circuit deter-mines this ratio: the integratorcircuit. If the time constant of theintegrator circuit changes, equaliz-ing pulses may charge the integratorand trigger the vertical oscillatortoo early. The best method to lo-cate an integrator malfunction is tochange the integrator unit or eachintegrator part to eliminate it. Ofcourse, an integrator malfunctioncan cause total loss of sync too.

On interlace problems it is wiseto check all channels. Often lackof interlace is a station fault. Oftenturning the vertical and horizontalholds slightly sometimes correctspoor interlace.

If both the horizontal and verti-cal sections show a tendency to jit-ter, roll, tear or completely losesync, the chances are good that async system malfunction is present.

PHASEDET

JANUARY 1963 37

Do not rule out this possibility,however, if only one section showssymptoms of poor sync. Most ofyou get this far on every synctroubled set without a hitch. Theproblem however, is what to donow!

The starting point is largely amatter of preference to individualtechnicians. Some start at the syncamplifier output, and some at thesync take -off point. It is probablybest to start at the input to thesync separator unless you particu-larly favor another procedure. Start-ing at the input to the sync separa-tor with a scope shows the con-dition of the composite signal andwhether both of the sync pulses arepresent. This is simpler than start-ing at a point deeper in the syncsystem, say the sync amplifier, andthen wondering whether the syncamplitudes are sufficient. Most al-ways this followed by going back-wards to the sync separator to checkgains, etc.

Manufacturers' waveforms areusually given showing sync shapeand amplitudes; these waveformsare very important. Care shouldbe taken to assure that the ampli-tude and shape of the pulses arewithin tolerance of the waveformshown.

Suppose that the input to thesync separator shows that the syncpulses are almost totally absent.Where do we go from here? Themost obvious answer is "back-wards"-toward the IF. But howfar to go and what to expect whenyou arrive there is the stopper.

Tubes in the path of the signalshould, of course, be changed be-fore extensive troubleshooting isbegun. Generally, a tube tester isan adequate check for tubes in the

sync circuits but only substitutionshould be used in the IF strip. Gas-sy tubes are the most frequent of-fenders in this section and are dif-ficult to detect with the averagetube tester. If tubes are available,however, substitution is the bestcheck in any section of the set.Since the problem may be severalgassy or poor tubes, all tubes shouldbe substituted simultaneously andthen removed one at a time.

Any defect in the quality of thepicture should be used as a clue tothe sync difi iculty. Except in stub-born cases the picture can be ob-served momentarily by careful ad-justment of the hold controls. Ifthis is not possible, the scope willhave to be employed. This isanother example of why it pays tobe familiar with scope TV wave-forms.

Finding the problem -stage is notusually difficult if a careful analysisis made of each wave form. Atthis point many technicians beginchanging each part in the stage inan effort to correct the malfunction.This is time consuming and notvery economical.

Pin -pointing the Fault

Ons:c the area of fault has beendecided upon, voltage measure-ments are the best checks availableto the technician to help him pin-point the faulty component or com-ponents.

Again, manufacturers' serviceliterature is a must. When this isnot available, the technician must

TUNER IF STRIP

TOVERT 41-OSC

INTEG

DET

SYNCAMP

TO H AFCGRID

VIDEOAMP

SYNCSEP

CRT

Sync flow path through most TV receivers. The sync separator clipsvideo from the composite signal leaving only horizontz I and verticalsync pulses

rely on experience and informationhe can gain from measurements ofnormal similar circuits or even nor-mal operating configurations foundin a tube manual. A word of cau-tion here: Some tubes in the syncsection of TV receivers are not op-erated in the linear portion of theircharacteristic curve. This is espe-cially true in sync separator or clip-per stages where the video falls inthe cut-off portion of the curvewhile the sync pulses are passed andamplified.

Learning some causes of mal-function in sync systems and associ-ating them with the problem at handis often helpful. In most cases thesymptoms won't be identical, butwill help you find the problem areasby their similarity. Let's look atsome of the common problems andsee what can be learned from them.

Pie-crusting-A symptom whichis easily recognizable by the shapefound in vertical -line objects in thepicture content. Basically, all ver-tical -line objects take on a hori-zontal dimension which may be assmall as a fraction of an in. tomore than 2 in. Both sides of thepicture look like the edges of acrimped pie crust like mother usedto make.

Pie -crust symptoms are generatedbecause the horizontal oscillator is"hunting" between a range of fre-quencies on both sides of the exactfrequency. The fault will be foundin the anti -hunt circuitry in theAFC section of the receiver. Anti -


O

O

SWEEP FRED7,850

SWEEP FREO60 CPS

4,110,-

inlkomillammenw

Fig. (A) - Horizontal and vertical waveforms at the input to the syncamplifier. (B) - After being processed in the first sync separator mostof the video has been clipped and the pulse is amplified. (C) - Anadditional clipper removes all video from the sync


TUBE

TESTER

REJUVENATOR

Emission tests and checks forshorts or opens can be made onCRTs with almost any free pointswitching type tube tester. At thesame time, many multiple sockettesters will test CRT emission andeven rejuvenate CRTs.

Most commercial rejuvenatorsplace 800 to 1000 v on the CRTgrids with the negative side of thishigh voltage on the cathode. TheCRT heater voltage is temporarilyraised 20 to 50 percent. Thus, thecathode is heated above normal andemission is accelerated momentarily,effectively cleaning the cathode andmaking a more abundant supply offree electrons available. The aper-ture in the grid and anodes may alsobe burned open at this time; thispermits greater emission when thetube is put back in use.

The circuit in Fig. 1 shows howhigh dc voltage can be obtainedfrom a tube tester. The tester usedis a low priced emission type, butthe circuit will be the same for al-most any unit. Merely locate thepower transformer tap which givesabout 250 vac and feed this to ahalf -wave voltage doubler. Thedoubler's dc output is applied to theCRT to be tested. When 250 v RMSis doubled and filtered, the dc out-put is about 700 v.

A 25Z6 is plugged into the sparesocket which is wired for the 25Z6in a voltage doubler circuit. Dou-bling can also be accomplished withunder -the -panel silicon rectifiers.

4 5. ReccCompleted testes with rectifier tube plugged into the spare so-.ket.The adapter cable is attached in the same manner as for CRT testing.

When a CRT requires rejuvena-tion, the 25Z6 is plugged into thespecially wired socket and the reg-ular set up for CRT testing is car-ried out. After reading the emis-sion, the filament voltage is in-creased and Si is pressed for 2 to5 seconds applying the dc to thegrids. SI is a SPDT push button(Mallory 1013, or similar type)which is mounted on the tube test-er panel.

Filament voltage for the 25Z6must be obtained separately becauseof the high voltage on the outputcathode. A 25 v filament transform-er is mounted under the panel (aStancor P6496, or comparabletype) and the electrolytic capacitorsneeded in the voltage doubler are

mounted beneath the tester's panel.This circuit is adaptable to most

tube testers and gives good results.If desired, a rotary switch can beinserted between the voltage dou-bler and the power transformer tapsfor selection of lower voltages. Thiswould permit a "gentle treatment"for quick responding CRTs.

The same care is necessary in us-ing this rejuvenator as with anyother. Do not over -do it. A seriesof short shots with emission testsin between is best. Increase theheater voltage one step at a time asneeded. Return the heater voltageto normal when testing for emis-sion. If the emission fails to improve,it's time to recommend a CRTplacement.

re-

250 V

LINE

TO UP POSITION8pf BUS OF LEVER

8 4-800V

MOMENTARY

450 V25Z6

8 pf

EiAif

450V

450VTO CENTEROF SHORT-MERIT SW

Circuit modification to convert tube tes-ers into rejuvenators

JANUARY 1963

Second to sync troubles, per-haps no other section in the TVreceiver causes the technician asmany headaches as the horizontaloutput system. It is difficult todraw a line showing where the hor-izontal output section overlaps orbecomes a part of another section.For discussion, let us arbitrarilyinclude the oscillator output cir-cuitry, the horizontal output tube,the high voltage system and asso-ciated circuitry. The later, ofcourse, includes the damper, yoke,flyback, high voltage rectifier andits component parts.

Functions of the aforementionedcircuitry is no mystery to most tech-nicians. A saw -type voltage is fedfrom the horizontal oscillator tothe horizontal output tube where itis amplified and matched to theyoke's impedance through the fly-back transformer. A by-productof the rapid flux change in the fly-back transformer during retrace isa high voltage spike which isstepped up through an auto -trans-former winding in the flyback. Thishigh voltage spike is rectified and

A keystoned raster is usually caused by a

short in the yoke

"Hour -glass" raster distortion results from 60cps ripple impressed on the horizontal outputgrid circuit

fed to the second anode of the CRT.The damper circuitry is em-

ployed to damp normal resonantyoke - flyback oscillations whichform the left (first portion) of thesweep.

Insufficient width is the mostobvious horizontal symptom. It iseasy for many technicians to con-fuse other symptoms with the ver-tical or sync section of the set.Some of the rarer and less obvioussymptoms are illustrated here. Theyinclude: The keystoned raster,which has a trapezoidal shape;the "hour glass" or severe "cokebottle" effect; "S" bending; wrin-kling and a thin vertical line.

Arcing and BendsMalfunctions in horizontal out-

put systems can cause almost everyconceivable symptom that affectswidth (or modulation) of the sweepor the sweep's brightness. In somecases, it can affect sync, AGC orvertical stability. Arcing may causesound and picture problems even inanother TV set. And conversely,some circuit configurations may

allow a vertical or sound problemto kill the high voltage.

Inaudible arcing in the high volt-age circuit often causes problemswhich are difficult to track down.Usually, the technician spends timein the video circuits before he getson the right track. Arcing is gen-erally evidenced by short blackand white interference lines in thepicture. Continuous arcing, how-ever, may smear the picture givingit poor resolution with symptomsindicating poor IF alignment.

Arcing is sometimes difficult todetect. If it is suspected, the fol-lowing procedure should be used:Listen carefully. Arcing soundslike a high pitched buzz. To lo-calize such arcing, roll a piece ofpaper into a tube about one in.in diameter. With the tube placednext to the ear, move the end ofthe tube around the high voltagecircuits. When the buzz is loudest,you have located the area of arc.Internal transformer arcing may bedifficult to locate in this manner.

If the arc can not be located bylistening, examine the high voltage

TV HORIZONTALHere's what to look for after

Less severe form of "hour -glass' is usuallycalled "coke bottle." Causes are the same asfor more severe distortion.

6 ELK Weepste

"5" distortion unaffected by video content isfrequently caused by a heater -to -cathode shortin the output tube


area in a darkened room. Somearcs deep inside the flyback can beseen as a tiny blue or orange light.Finally, after the set has operatedfor a short time, feel the high volt-age components. Although mostcomponents will be warm, noneshould be hot. Heating of the fly-back transformer is almost alwayscaused by a faulty flyback trans-former if the output tube drive isnormal.

If both of these methods fail, agenerous coating of anti -coronadope is sometimes effective.

Raster bending takes severalforms. Three types are most com-mon, however; "S" bending whichis unaffected by the picture con-tent; "S" bending which changesdepending on the picture black andwhite ratio; and coke bottle or hourglass bending. The type of bend-ing which is unaffected by picturecontent may move through the pic-ture from top to bottom or viceversa. "S" bending is also some-times incorrectly referred to as"flag-waving" or "hooking."

A scope is usually the fastest

way to find the cause in any typeof bending. In many cases, theVOM or VTVM will show voltageand resistance measurements to benormal even though the cathode orgrid elements of the output tube isbeing ac modulated.

Bends in step with video changesare always caused by a "leak" be-tween some video stage and a hor-izontal circuit. Most frequently,it is caused by a partially openelectrolytic or component valuechange in the sync or oscillator cir-cuitry. This type of malfunctionis not classified as a horizontal out-put problem.

The causes of constant bends, orbends which may drift through thepicture, are usually found in theoutput system. Cathode to heatershorts are the most common causeof "S" bends - with electrolyticsrunning a close second. A scopetest will always show either thegrid or cathode is being modulatedby the supply voltage.

Shunting associated filters withan electrolytic of the proper valuewill usually locate the faulty com-

AND HV REPAIRSyou've checked output tube current

Pattern generated by a receiver having a

shorted boost capacitor and with damper tuberemoved.

Open yoke winding sometimes causes a

single vertical line and reduced high voltage.High voltage reduction may be insignificant.

ponents and is often faster thanmethodical testing. After using thistrial and error method, for a shorttime however, the time honoredsystematic approach should be used.

Some older sets biased the hori-zontal output tube with a negativevoltage from the main power sup-ply. Poor filtering in this circuitis often the cause of coke bottleor hour glass effects. Generallyspeaking, pinching from both sidesof the picture is caused by gridmodulation, while "S" type bendsare usually cathode modulationproblems.

Wiring shorts should not be over-looked either. In series s'ring sets,all f ubes and their filament cir-cuits should be thoroughly investi-gated, since a filament short inotherwise unassociated circuitrymay cause horizontal symptoms.

Wrirkles and Insufficient WidthA wrinkled raster, or one which

appears to be intensity modulated,often causes the best techniciansto scratch their heads. Basicallythe two symptoms are generated

Insufficient width but with no foldover maybe caused from aging of several components.This is most easily cured with "over-riding"circuit additions

Damper tube or yoke are most frequently atFault when light wrinkles appear inraster.

JANUARY 1963 41

Horizontal and HV Repairs Continuedfrom the same type of malfunction.When a wrinkle or foldover devel-ops, the beam is virtually stoppedfor some finite period or even re-versed. A bright line or bandsunerimposed on the raster indi-cates that the electron beam isslowed so the CRT phosphor isactivated for an extended period.

Both of these problems are oftenfound with insufficien' width. Wrin-kling is actually ringing which iscaused by some form of mismatchor lack of damping in the horizon-tal output yoke circuits. The damp-er tube or its associated circuitsare most often at fault, thoughfrequently a linearity, width coilor yoke matching network com-ponent is at fault.

Changing tubes in these circuitsbefore any other troubleshooting isimperative. Beyond that, substitu-tion of suspected components isworthwhile. A leaky boost capaci-tor in some circuit configurationscauses ringing or insufficient width.

One simple method to determinethe area in which the fault lies isto note which side of the screenis most affected by the defect. Ifwrinkling or foldover appears on

the left side of the screen, thedamper circuits are almost alwaysat fault. One exception is Bark-hausen oscillations. These oscilla-tions appear after the horizontaloutput tube is cut off and are evi-denced by one or more dark verti-cal lines at the left side of thescreen. Changing or selecting atube not susceptible to these oscilla-tions is the best method to deal withthem. Reducing the horizontaldrive may also eliminate them.

Insufficient width is often a cu-mulative problem; one which hasdeveloped slowly and gone unno-ticed until it finally pulled in andbecame objectionable. Since re-pairing this type of malfunction canbe costly and time consuming, itis strongly recommended that anover-riding measure be taken. Asmall capacitor across the widthcoil is very effective, or in extremecases, removal of the width coil.Similar success may be obtainedby inserting a capacitor across tapson the flyback secondary.

A high voltage capacitor acrossthe damper tube may be employedin cases other modificationsare ineffective.

a

2NDANODE

O WIDTH

Q9

LIN

TTTTH CENTER

B+

2NDANODE

500pf

Typical Horizortaloutput system sche-matic.

Voltage doubler cir-cuit found in someolder sets usually in-creased voltage byno more than 20 per-cent.

Increasing the drive to the outputtube, the screen voltage or B+ arealso recommended. The technicianshould be careful, however, that theplate and screen current ratings ofthe output tube are not exceededwhen employing these methods.

Blooming and Loss of High Voltage

Blooming and low voltage prob-lems are one and the same. Low2nd anode voltage causes the CRTelectron beam to approach thescreen more slowly, thus allowingthe deflection coils to bend the beamfurther than normal.

Drawing an arc from the outputand rectifier tube caps is the oldstandby to determine the presenceof high voltage. To the experiencedtechnician, this can be a fairly ac-curate and effective method. How-ever, a great deal of experienceobserving "normal set arcs" is nec-essary. The best and most ac-curate method is to use a highvoltage probe and measure the highvoltage. This should be measuredboth with the CRT connected anddisconnected from the rectifier out-put. A gassy or shorted picturetube often gives the technician theimpression that the high voltage orhorizontal system is at fault.

Again, feeling components to de-tect abnormal operating tempera-tures and substitution are excellenttroubleshooting methods.

Since it is often impossible tostock all the necessary components,a flyback -yoke tester is a must.

A shorted boost capacitor cansometimes be easily detected withno test equipment. If no raster ispresent, pulling the damper tubewill restore the sweep to a portionof its normal width if the boostcapacitor is shorted. An ohm-meter may be used for a "cold"check to measure the resistancebetween pins three and five of thedamper tube socket. Resistancesbelow abou 50 kit should be in-vestigated. Normal resistances runas high as 250 kn.

In old RF powered high voltagesystems and some new sets, an openyoke can present a vertical line.Newer sets with this symptom us-ually operate at a greatly reducedvoltage with an open yoke wind-ing. Depending on the yoke returnused, the plugs or connecting yokewire should be checked before sub-stitution.


EICO Grid Dip Oscillator, Model710 K at $49.95 wired, $29.95 kit-We built this instrument from a kit.It went together easily, though in

Triplett Model 3432-A signal gen-erator, at $119.50. -A signal gen-erator is basically a very simplepiece of equipment. At the most,it seldom has more than three tubesand more ' frequently only two.Simplicity in most equipment is adifficult -to -achieve virtue - the3432-A is simple.

Seven overlapping 160 degreescales are located on an easy -to -

GRID DIP OSCILLATOR

spots the wiring was a little tight.When the kit was finished, no cali-bration-sliding the dial, etc.-wasnecessary. The only problem en-countered was a faulty phone jackwhich made contact intermittentlyand caused an erratic meter indica-tion. The fault was corrected, how-ever, by simply bending the jackcontacts slightly so they remainednormally closed.

A phone plug was inserted in thejack several times but no furthertrouble was noted.

All necessary coils were suppliedpre -wound in a permanent contain-er. With the eight coils supplied, theunit oscillates and detects from 400kc to 250 Mc in overlapping ranges.

A sensitivity control and the tuningadjustment are located so the unitcan be easily operated with onehand.

The unit may be operated as agrid dip meter by disabling the os-cillator with the defeat switch lo-cated on the front panel The phonejack located next to the meter dis-ables the meter circuit and allowsthe operator to obtain accurateaudio zero beats with other fre-quencies.

The unit is a good buy and cer-tainly merits consideration by bothradio and TV technicians. No otherinstrument is as versatile for power -off troubleshooting and alignmentin tuned circuits.

TEST INSTRUMENTSfor Bench and Caddy

SIGNAL GENERATOR

read circular dial. A single r -f out-put jack is conveniently located atthe center -bottom of the front paneland a modulation input is providedon the lower right corner. If exter-nal modulation is not necessary,the unit provides 400 cps internalmodulation.

The generator range extends from160 kc to 110 Mc on fundamen-tals and up to 220 Mc on har-

monics. We checked the units cali-bration after a few minutes warm-up against WWV and found itsurprisingly accurate and easy toreset to the same frequency with-out signal reference after it hadbeen shifted. Throughout its test(about 11/2 hr.) the instrument'sdrift was not detectable with normallab equipment. A cathode followeroutput provides good output sta-bility. In addi ion to the off -on, modand unmod control, a band selectora coarse and fine attenuator areprovided.

The unit is handsomely housed ina ball cornered black hammertonefinished case with a brushed alu-minum control panel. If your shop-ping for a new signal generator,this should be on your check list.It would be a welcome addition toalmost any lab or service shop.


JANUARY 1963 43

1 tTOUGH DOG CORNER

Difficult Service Jobs Described by Readers

Hot Ground ConnectionOn a recent service on a General

Electric 'S' chassis, the picturelooked OK until the set warmed up,then the bottom slowly pulled up,anywhere from 1/2 to 2 in., for afew seconds, and then returned toa full picture. Seconds later it re-peated with varying degrees of pull-up, until it established a regular slowmoving cycle of up and down whichonly affected the bottom edge of thepicture, the top remained stable.

I noticed that once it started thiscontinuous slow moving cycle, thatwhen the bottom was on the upswing it created a squeezed portionof about a 1 -in. section across thescreen. This squeezed portionwould then slowly travel up, chang-ing the linearity as it traveled toabout two thirds of the way to thetop of the picture and disappeared.At this point, the bottom of the pic-ture, already up about 2 -in., wouldslowly return to a full picture. Thenthe cycle would repeat continuously.

After making preliminary checksin the home, I brought the set to theshop. This `S' chassis was made inearly, middle and late versions, with

various differences in the verticaloscillator and blanking circuits. Thisparticular "dog" was classified asthe early version. These chassishave the dipped soldered pin ter-minal connectors. After exhaustivechecking, the trouble turned out tobe a poor ground connection onone of those terminal sleeve con-nectors crimped to the chassis.

Although the connector was elec-trically above ground, the filamentof the 6BL7-GT which was con-nected to this terminal, was lit verybright and checked approximately6-v. But a scope check revealed abeautiful 60 -cycle sine wave on theground terminal, until I soldered thesleeve to the chassis, bringing the setback to normal operation.-Fred-erick W. Hess, Cleveland, Ohio.

Radiating Resistor

Recently, 1 was asked to remedya problem noise in a CTC-5 RCAcolor receiver. At the owner's home,I noted the fault was present onlywhen the antenna disconnected, thecracking sound was not present al-though no flashing was noticeable

Poor ground caused "cycl;ng' foldover.

on the screen in either case: It wasnoted that a small ac/dc radio wasalso affected by the noise.

While wondering what to check,I saw the brightness was no longerpresent. I removed the back of theset to find the heater of the 6AW8,(first Video amp) was not lighted.When I moved the tube the heatercame on once more. This indicateda bad tube socket or associate con-nections, so the chassis was removedfrom the cabinet to be taken to theshop. When we left the owner's res-idence, we decided the troublecould still be in the antenna systemsomewhere; the anntenna was atop75 ft of tower.

In the shop I replaced the beforementioned tube socket. While doingso, I noticed the case of a 2 w re-sistor, associated with the audiooutput stage, was cracked althoughit was not burned. I replaced thisresistor. After checking out thechassis, I returned it to the owner.

Upon completion of the hook-up,including the lead-in wires, thecracking was no longer present.

The fluctuating voltages presentin the audio circuitry evidentlycaused the cracked resistor to breakdown and radiate to other parts ofthe set and the radio.-Paul Noel,Ir., York, Pa.

TOUGH DOGS WANTED$10.00 paid for acceptable items. Use

drawings to illustrate whenever neces-

sary. A rough sketch will do. Photo-

graphs are desirable. Unacceptable

items will be returned if accompanied

by a stamped envelope. Send your

entries to "Tough Dog" Editor, ELEC-

TRONIC TECHNICIAN, 1 East First St.,

Duluth 2, Minnesota.


SENCORESIMPLIFIES COLOR SERVICING

NEW! CA122COLOR CIRCUIT ANALYZER

A simple approach to a complex problem

Here is an instrument that is designed to eliminate the guess-work in color TV servicing. A complete analyzer that pro-vides all required test patterns and signals for testing fromthe tuner to the tri-color tube. Additional analyzing signalsfor injection at each stage including audio, video and sync,brings to life a truly portable and practical TV analyzer foron the spot service; virtually obsoleting other analyzers withthe advent of color. Sencore's simplified approach requiresno knowledge of I, Q, R -Y, B -Y, G -Y or other hard to re-member formulas. The CA122 generates every signal nor-mally received from the TV station plus convergence andcolor test patterns.The CA122 offers more for less money:TEN STANDARD COLOR BARS: The type and phase that isfast becoming the standard of the industry. Crystal con-trolled keyed bars, (RCA type) as explained in most serviceliterature, offer a complete gamut of colors for every colorcircuit test.WHITE DOTS: New stabilized dots, a must for convergence,an ( reated by new Sencore counting circuits.CROSS HATCH PATTERN: A basic requirement for fast CRTconvergence.

VERTICAL AND HORIZONTAL BARS: An added feature tospeed up convergence, not found on many other color gen-erators.SHADING BARS: Determines the ability of the video ampli-fier to produce shades (Y Signal) and to make color tem-perature adjustments. An important feature missing on othergenerators.COLOR GUN INTERRUPTOR: For fast purity and convergencechecks without upsetting color controls. Insures proper op-eration of tri-color guns, preventing wasted time in troubleshooting circuits when CRT is at fault.

A must for color . .

a money maker for b ack and white TV servicing

ANALYZING SIGNALS: RF and IF signals modulated withany of the above patterns for injection into grid circuits fromantenna to detector. IF attenuator is pre-set for minimumsignal for each IF stage to produce pattern on CRT thusproviding a check on individual stage gain. Sync and video,plus or minus from 0 to 30 volts peak to peak, have separatepeak to peak calibrated controls for quick checks on all videoand sync circuits. Crystal controlled 4.5 me and 900 cyclesaudio simplify trouble shooting of audio circuits.NEW ILLUMINATED PATTERN INDICATOR: A Sencore first,offering a rotating color film that exhibits the actual colorpatterns as they appear on color TV receivers. Locks in withpattern selector control.You'll pay more for other color generators only.

Dealer Net 187.50

74.111WIIIIIKIPSIWO.4ffr AIINIEVISMIGNIF=4,0:11111111jepiplIERENC.

NEW! PS12O PROFESSIONALWIDE BAND OSCILLOSCOPEA portable wide band 3 inch oscilloscope for fast, on -the -spottesting. An all new simplified design brings new meaning tothe word portability...it's as easy to operate and carry as aVTVM. Though compact in size, the PS120 is powerful inperformance: Vertical amplifier frequency response of 4 MCflat, only 3 DB down at 7.5 MC and usable to 12 MC, equipsthe technician for every color servicing job and the engineerwith a scope for field and production line testing. AC coupled,with a low frequency response of 20 cycles insure accuratelow frequency measurements without vertical bounce. Sensi-tive single band vertical amplifier; sensitivity of .035 voltsRMS for one inch deflection saves band switching and guess-ing. Horizontal sweep frequency range of 15 cycles to 150KC and sync range from 15 cycles to 8 MC (usable to 12MC) results in positive "locking" on all signals. New exclu-sive Sencore features are direct reading peak -to -peak volts-no interpretation; dual controls to simplify tuning; leadcompartment to conceal test leads, jacks and seldom usedswitches. Rear tilt adjustment angles scope "just right" foreasy viewing on bench or production line.Size: T'w x 9"h x 11),cd. Weight: 12 lbs.

Dealer Net 1 24.50(with low cap. probe)

Kit 74.50

JANUARY 1963

A must for servicing color TV in the home . . . lowest

priced broad band scope.American made

SENCORE, ADDISON, ILLINOISfor more details circle 33 on post card

45

All hand wired - all

l I SHOP HINTSTIPS FOR HOME AND BENCH SERVICE

Open Jack ContactsI have experienced the problem

of phone jack n. c. contacts beingspread from plugging and unplug -

Open jack contacts cause faulty speakerssymptoms.

ging the ear phone. This conditioncauses symptoms similar to an openvoice coil (speaker inoperative,phones ok). Instead of taking setsapart to check them, it is wise tocheck these contacts first.-GeorgeWarshower, Brooklyn, N.Y.

Cheater HandleA handle for cheater cords will

prevent the cord from being pulledapart when unplugging them. I

Wire handle on cheater cord increases cordlife and makes removal easier.

bent mine from No. 10 or 12 cop-per wire as shown in the accom-panying drawing.-Lee D. Fortun,Viroqua, Wis.

Skinny FingersA length of thread doubled thru

a piece of spaghetti makes a use -

LOOP OF THREAD

Spaghetti and thread useful tool to holdsmall parts in cramped space.

ful tool for inaccessible places. Atuner slug screw may be placedin the loop tension on two freeends holds screw firmly by shoul-der; it can then be inserted thrusmall opening in tuner housing toa position in front of alignmentopening which is usually too smallto admit the screw head. It is goodfor any place with limited room.Phono cartridges etc. Freeing oneend of thread releases work.-Al-bert S. Lombard, Windham, N. Y.

Cheater Eliminates Tester Cords1 have removed the ac cords

from the tube checker and Kinerejuvenator I use on house calls andinstalled a male interlock plug intheir place. To use them I plugin the cheater cord which is alreadyconnected to the outlet. This savesunwinding and winding anothercord each time.-T. F. Edmonds,Blue Mound, Kan.

Six in. Extension CordI carry a special adapter in my

caddy consisting of a male cheater -type connector wired to a cube out-let. It can be plugged into thecheater cord and will power severalinstruments.-Raymond J. James,Passaic, N. J.

Adapter for cheater cord has outlets forseveral instruments.

Idler SlippageOn non -Hi Fi phonographs that

drag and don't respond to the usualtreatment of changing idler wheelsor other drives and cleaning upthe working parts, the followingtreatment always works: score theinside of the platter with a screw

Score marks and rosin improve platter trac-tion on old phonographs.

driver or other sharp tool. Thenrub rosin into the grooves. Thisgives good traction without chang-ing the speed or damaging the idlerwheel. -Herman Schoenblum,Flushing, N. Y.

Foil Kills OscillatorI o kill the oscillator in a super-

het for allignment, place a pieceof aluminum foil between the os-cillator capacitor plates to short therotor and stator without damagingthe capacitor. - Jay Prager, NewYork, N. Y.

SHOP HINTS WANTED!$3 to $10 for acceptable items. Use

drawings to illustrate whenever nec-cessary. A rough sketch will do.Photos are desirable. Unacceptableitems will be returned if accompaniedby a stamped envelope. Send yourentries to Shop Hints Editor, ELEC

TRONIC TECHNICIAN, 1 East First St.,

Duluth 2, Minnesota.


27 -Mc 2 -WAY RADIO

44 INAINSOCT PIPPOPOPPOPPOISPIPIPPOPPOPPOPIP111110POPPPPIPPPIP00/111111110PPPOPPOOPPO11,PPO

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More Features Improved Performance AT A LOWER PRICEHere is THE outstanding bargain today in a 2 -way Citizens' Bandradio: THE NEW RCA MARK VIII. Compact, dependable, simpleto operate, it outperforms and offers more features than eventhe fan -sous RCA Mark VII.Look what this remarkable new unit offers you: 9 crystal -controlled transmit and receive channels Tunable receiver for reception of 23 C -B channels; dial marked

in both channe! numbers and frequency Exceptionally good voice reproduction-high intelligibility Maximum allowable transmitter input of 5 watts°-nominal

output of 3 watts or more Highiy selective superheterodyne receiver with one rf and two

if amplifier stages Operates from standard 117 -volt AC; separate DC power supply

(optional) for mobile installations (you don't pay for unneces-sary power supplies)

Electronic switching-no relay noise or chatter Illuminated "working channel" feature Light and compact-only 3'/2 inches high, weighs only 8 pounds

with mike; fits easily under the dashboard of even a compact car Improved Automatic Noise Limiter to reduce effects of ignition

and similar interferenceplus many more features to increase its usefulness and efficiency.

The new low Mark VIII price $14950**puts 2 -way radio convenience within reach of everyone

GET THE FULL STORY; FILL OUT AND SEND IN THE COUPON BELOW

RCA Electron Tube Division, Commercial Engineering, Dept. A -46-R415 South Fifth Street, Harrison, New Jersey

Please! Rush more information on the new RCA Mark VIII 2 -wayCitizens' Band Radio.

Name

Address

City Zone State

Maximum plate input power to final radio -frequencyamplifier stages as defined be FCC regulations "Optional list price

The Most Trusted Name in Electronics

NEW PRODUCTSFOR MORE INFORMATION CIRCLE PRODUCT NUMBERS ON POST CARD

TWO WAY RADIOS 200A full power family of mobile 2 -way

radios is called the "800" series. Thisseries of transmitter/receivers delivers full

100 w output in the low band and 75w in the high band. Despite the full -power output, the series is packagedin a compact, three -purpose control headand separate transmitter -receiver chas-sis. The units are designed to occupyminimum space, to require little serviceattention, and to sell at relatively lowunit and systems prices, according to themanufacturer. The models are termedtype MCA 825-A for the 25 to 45 Mcrange with a rated output of 100 w, andtype MCA 875-A for the 144 to 174 Mcrange at an output of 75 w. Audio poweroutput is 1.5 w with less than 10% dis-tortion. Communications Dept., Allen B.Du Mont Labs.

STEREO AMPLIFIER 201I his stereo amplifier kit, SA -210, con-

sists of two Class A amplifiers, twodrivers. and two preamplifiers. It has six

inputs for magnetic phone or tape, andtuner or crystal pickup. A stereo -mon-aural switch allows unit to be used alsoas a 16 w monaural amplifier. The kitreportedly is uniquely designed for easyand enjoyable assembly. It features largepictorial illustrations and schematic draw-ings and easy to follow, step by step in-structions. Price $29.95, kit, and $49.95wired. Merrell Electronics Inc.

TAPE RECORDER 202The "Continental 401" four -track ster-

eo record and playback Hi-Fi tape re-

corder is said to be completely transistor-ized and features the fourth speed of15/16 ips for up to 32 hours of recordingon a standard 7 in. reel. The unit usesfour type AC107 transistors in its pre-amplifiers. The AC107 is said to be theonly transistor specifically designed fortape recorders, having passed unusuallystringent low noise requirements in de-sign and manufacture. Being fully tran-sistorized, the 401 requires no warm upperiod. The self-contained recorder In-cludes two preamplifiers, two power am-plifiers and two loudspeakers, one ofwhi:h is in the removable cover to per-

mit realistic stereo separation duringplayback. Price: $399.50. North Ameri-can Philips Co., Inc.

DYNAMIC MICROPHONE 203An omni-directional microphone, the

Model 575 "Versadyne," reportedly fea-tures smooth response from 40-15.000cps. It is styled in a rugged "Armo-Dur" body with satin anodized cap andstainless steel grill. Small and light-weight. the microphone is adaptable tohand-held, stand -mounted or lavalieruse. The dynamic cartridge is said to heunaffected by temperature and humidityvariations. The Model 575S featureshigh impedance and high output for usewith public address amplifiers where

only a moderate length of cable is re-quired. The Model 575SB is a low im-pendance model designed for use in in-stallations where long cable lengths arerequired or for use with transistor am-plifiers where a medium or low imped-ance microphone is required. Bothmodels feature a slide -to -talk lockingswitch. Price: $24, Model 575S; $21.575B. Shure Brothers, Inc.

ANSWERING UNIT 204A telephone answering set, the Model

FP, is said to answer the telephone andrecord up to 240 incoming messages. Theunit is the newest member of a family oftelephone answering sets designed tomeet the needs of any size business. TheModel FP. styled by Raymond Loewy,answers the phone with a 20 sec mes-sage. tape-recorded in the businessman'sown voice. A "beep" tone then tells thecaller when to start his tape-recordedmessage, which may be up to 30 seclong. Incoming calls are recorded on aone -hour tape (120 messages). Two-hourcapacity (240 messages) can be suppliedat no added cost. The outgoing message

can be changed at any time through amicrophone supplied with the unit.Automatic Electric Sales Corp.

TV CONSOLE 205An educational television control con-

sole with "room for growth" reportedlyhas been developed to meet an expectedsurge in demand from school systemsand other educational institutions. De-s i g n e d especially for school districtswhich are just starting out with theirown ETV setups, the new modular con-trol console requires only one operator.Two units make up the basic controlconsole which can handle two cameras.As need increases and more funds be-come available. an additional unit can beadded to the console providing controlfor another camera for movies and slidesto he projected through the ETV system.Of the 11 audio signal sources which theconsole is capable of controlling, eightare handled by four adjustable -gain mix-ing amplifiers and three are relay -


CLAROSTATUN/-TITE

cis CONTROLSLightning fast! Positive dependability tool Clarostat Uni-Titefield -assembled controls assemble in seconds, and stay put under the mostrigorous service conditions. It's simply a matter of clicking in the propershafts, inserting one shaft inside the other, a twist of the wrist andthat dual is made automatically-for keeps.

Clarostat offers the most complete line of designed -for -servicepotentiometers. Write for complete details today ..

DISTRIBUTOR SALES DIVISION

CLAROSTATJANUARY 1963

CLAROSTAT MFG. CO., INC. DOVER, NEW HAMPSHIRE- for more details circle 17 on post card

49

Ask yourself. . . do you have the time to Tool arounddrilling, sawing, filing . . . trying to makea "Universal" replacement tuner fit in

place of the original? Do you have all theexpensive instruments and equipment tocomplete the alignment so essential aftereach tuner repair or replacement? Can youspare the time repairing and adjusting yourown TV tuners and can you charge enoughto justify the time spent?

A Castle Overhaul eliminatesevery one of these problems.

Castle replaces all defective parts (tubesand major parts are extra at net prices)and then aligns your tuner to the exact,original specifications. Simply send us

your defective tuner complete; includetubes, shield cover and any damaged partswith model number and complaint.

ALL MAKES ONE PRICE

VHF TUNERSUHF TUNERSUV COMBINATIONS

995

UV combination tuner must be of one piece construc-tion. Separate UHF and VHF tuner with cord or geardrives must be dismantled and the defective unitsent in. 90 Day Warranty.

Send for FREE Mailing Kit and complete details

CASTLETV TUNER SERVICE, INC.

Check Map for theCastle Center Serving You.

5713 N. WESTERN AVE., CHICAGO ,LLINOIS653 PALISADE NORTH. CLIFFSIDE PARK. N. J.CANADA: 136 MAIN ST, TORONTO 13, ONT.

Pioneers in TV Tuner Overhauling

NEW PRODUCTS

switched to the mixer output bus. Theaudio level of any one of 11 signalsis through a master gain control and ismonitored by a VU meter. ETV Sales,General Electric Co.

SHIELDING 206\ 'sound shroud" reportedly stops

electrical interference at its source inmarine and automobile engines to im-

prove the performance of all types ofmarine and mobile electronic equipment.The system wraps an insulating barrieraround the entire engine ignition sys-tem complex. This positive shielding iseffective immediately and eliminates thetime consuming and technically difficultmethods involving cutting -and -trying by-passing, and adding extra resistance.It is said to offer the additional benefitof water -proofing the entire ignition sys-tem. Price: $115 to $129.50 for mostmarine engines, $119.50 for automobiles.Webster Mfg. Co.

MOTOR 207Called the "Mart," this motor provides

for reversible rotation, has a stainless

steel shaft, graphite brushes and sinteredmagnets and is designed to deliver upto 500 hr of service, continuous duty,at full load, according to the manu-facturers. No-load speed is 7500 RPMoperating load speed 5000 RPM and themotor produces a minimum of 0.125oz in. of torque under operating load.Operating voltage may vary from 1.25to 24 v and amp input is 0.75 (at 3 v)under operating load. Martronics, Inc.and up to 220 Mc on second harmonic.

COUPLER 208The "ANTENNA -1-," a household

coupler package that includes an induc-tive set coupler and 25 ft of twin -leadis used to connect any number of addi-tional sets to an existing antenna line.

ra., Ancen, Oaviaio-Ousy MLA JOINTF-NN,

RUN EXTRA SETS OFF PRESENT ANTENNA

ik tst,[1:1

a

TROURLE

FREEINSTILL 11

YOURSELF

$339

.....ZS 1001

T111.41...111

40 .. .... as Mk,. 41.6.

For information, write Department MA 553- for more details circle 29 on post card


- - for more details circle 15 on post card

50

"We contracted a fifteen -thousand -dollar job throughthe Yellow Pages!" says T. C. Kaemmerlen, President,Kaemmerlen Electric Company, St. Louis, Mo. "OurYellow Pages program is our only form of advertisingand, though we've investigated other media, we'vedecided that our Yellow Pages program is the bestpossible form of advertising for our business. Really,we couldn't do without the Yellow Pages!"

Yellow Pages

AUTHORIZED SERVICE

& PARTS FOR

OVER 12Q

/Z./ JEfferson 5-2222

ounlirHOURS. WEEKDAYS I TO S

SATURDAYS 9 "0 17

2728 LOCUST

Display ad (shown reduced) runs under ELECTRIC APPLIANCES-SMALL-FEPAIRING. Call the Yellow Pages man at your BelTelephoie Business Office to plan your program.

JANUARY 1963

- for more details circle 11 on post :ard

51

Cuphonics

Orbit Action

CERAMIC 1 CARTRIDGES

GB

REPLACE ALL STEREO ANDMONAURAL CARTRIDGESEASIEST OF ALL CARTRIDGESTO INSTALL

No. 1 choice of phono manufacturers.

Now, your most logical choice

for exact replacementNew Euphonics Orbit Action Cartridges are exact replace-ments for millions of Euphonics Cartridges now in use, andall other ceramic cartridges. Rugged, trouble -free and easiestto install, Euphonics cartridges offer you these importantadvantages:

EXCLUSIVE ORBIT ACTION Eliminates twisting of lead wires

Reduces mass of playing needle

Simplified needle replacement

*Positive tip rake angle-no dirtcollecting "hook"

Provides same wide -range re-sponse from both needles: 16-25,000 cps.

Other Advantages: Unique mounting bracket permits fast, snap -ininstallation of cartridge Low tracking force (2 grams) for minimumrecord and stylus wear Stylus automatically retracts when arm isdroppea PZT ceramic elements eliminate magnetic hum and areimpervious to heat and moisture High compliance: 4 micro -cm perdyne 4 terminals-complete with jumper for 3 -terminal installation.

Complete with dual needles.U-8..0007 Sapphire and .003 SapphireU-9..0007 Diamond and .003 Sapphire

ALL PRODJCTS AMERICAN MADE For complete details seeyour distributor or write Dept. ET -1

CuphonicsCORPORATION

GUAYNABO, PUERTO RICO, U.S.A.

NEW PRODUCTS

The unit is snapped on the main antenna line in seconds, with-out tools, and the twin -lead is connected to the additional set.Isolation factor between final set and any auxiliary set is12 db (24 db between auxiliary sets). Loss due to placementon line with electro-magnetic operation is only Ih db for low -frequency channels and I/4 db for high. Electrical qualitiesbetween main line and tap line are said to be automaticallymatched. Price: $3.39. Aerogap.

CAPACITORS 209Capacitors to

0.47 j.if, 25 vdcw,is offered in the"Transcap" line ofceramic capacitors.A new style offers0.22 Af in a casesize of only 0.895in. x 0.156 in.thick and 0.47 gin a case size ofonly 0.895 in. diax 0.200 in. thick.Besides a veryhigh capacitanceper unit volume,another advantagecited for these ca-pacitors is thatthe high resistivity

remains constant with increased voltage whereas the normalsemiconductor type of capacitor exhibits a decrease in resis-tivity very rapidly with increased voltage. Price $0.12 each,0.22 id and $.235, 0.47 mf. Erie Resistor Corp.

SELF SERVICE TESTER 210The Model 203 -

LB reportedly testsall tube types. in-cluding the latestNuvistors, Novars,Compactrons andnew 10 Pin Tubes.It also tests autoradio vibrators,batteries, fuses andpilot lights. Thelo -boy cabinet de-sign is finished ina light green, whiteand gold colorcombination. The

tube compartment has four sliding drawers with tube dividersand drawer sheets for automatic inventory control. The 63phosphor -bronze beryllium sockets are said to assure positivecontact and long life. Easy -to -read quick flip tube charts listsover 1200 tube types. The unique circuitry of the #203 -LBallows it to accommodate new tube types as they are intro-duced. New tube charts are available periodically. Price$254.50. Mercury Electronics Corp.

TOUCH CONTROL SWITCH 211Designated "I ouch Control Switch," this device operates

by merely touching an antenna input wire to turn it on andtouching another to turn it off. The circuitry of the switchhas been designed around the "Dynaquad" - a PNPN

52



MALLORYP. R. MALLORY A CO. Inc.

#140h4tiifTips for Technicians

Mallory Distributor Products CompanyP. 0. Box 1558. Indianapolis 6. Indianaa division of P. R. Mallory & Co. Inc.

How to usetemperature compensating

ceramic capacitorsWhile an oscillating circuit is warming up, its fre-quency changes. Distributed capacitance in tubes andcoil will drift in the "positive" direction-tending todecrease the resonant frequency. Unhappily, the tun-ing capacitor, if it is a conventional mica or paperunit, also drifts in this same direction . . . thereby add-ing to the downward frequency shift.

This can be a real nuisance. In the local oscillator cir-cuit of a superhet receiver, it leads to constant read-justment of tuning as the set warms up. It may alsointroduce appreciable error in a ringing oscillatortiming circuit in TV sets.

Here's where ceramic capacitors enter the scene. Un-like capacitors which have a ''natural" material asdielectric, they use a man-made, rock -like materialwhose composition can be adjusted to just about anycapacitance -temperature characteristic you want.

Some ceramic capacitors have a positive temperaturecoefficient: these are the kinds you'd use in bypass,coupling and buffer applications. Others have a zerotemperature coefficient, remaining unchanged in therange from 25° to 85° C. And you can get 'em with anegative coefficient so that the capacitance change goesopposite to that of the other circuit elements, giving aconstant LC product and substantially steady fre-quency during the warm-up period.

The usual negative temperature coefficient is 750 partsper million per degree C. But if you happen to needsome non-standard coefficient to compensate yourparticular circuit, there's a simple way to calculate theparallel combination of zero and negative coefficienttypes that will do the job. Write to us and we'll giveyou details.

When you go looking for ceramics, be sure to ask forMallory Discaps®. They're made by Radio MaterialsCompany, a division of Mallory-world's largestmanufacturer of ceramic capacitors. Your Mallorydistributor has a complete stock, in the handy five -pack, mounted on a file card that's especially easy tokeep on a peg board or in a file drawer.


JANUARY 1963 53

1

PLUG-IN TYPEPORTABLE

INVERTERS*A.C. Household Elmtrisity MODELSAnyvolisro . . . la your 6.RMF (6 volts) 60 to 80own car, boat or plans watts Shipping weight 12

Operates Standard A.C. lbs. DEALER NET Record Players PRICE $33.00Dictating Machines 12T-RME (12 volts) 90 to Small Radios 125 watts. Shipping weight Electric Shavers 12 lbs. DEALER NET Heating Pads, etc. PRICE ..... . . $33.00

.fAdditional Models Available

"A" Battery

ELIMINATORFor Demonstrating and

Testing Auto Radios-TRANSISTOR or VIBRATOR

OPERATED!Designed for testing D.C.Electrical Apparatus on Reg-ular A.C. Lines-Equippedwith Full -Wave Dry Disc -Type Rectifier, ingnoiseless, interference -freeoperation and extreme longlife and reliability.

MAY ALSO BE USED AS A BATTERY CHARGERMODEL 610C-ELIF ... 6 volts at 10 amps. or 12 voltsat 6 amps. Shipping weight 22 lbs.

DEALER NET PRICE $49.95MODEL 620C-ELIT... 6 volts at 20 amps. or 12 volts at10 amps. Shipping weight 33 lbs.

DEALER NET PRICE $66.95

AUTO -RADIO

VIBRATORSBy every test ATR Auto -Radio Vibrators are best!, . . and feature CeramicStack Spacers, Instant Start-ing, Large Oversized TungstenContacts. Perforated Reed.plus Highest Precision Con-struction and Workmanship andQuiet Operation!

There Is an ATR VIBRATOR forevery make of earl

Ask your distributor for ATR's Low Priced type 1400,6 volt 4 -prong Vibrator; and 1843, 12 volt 3 -prong; or1840, 12 volt 4 -prong Vibrator. THE WORLD'S FINEST!

ATRUNIVERSAL

KARADIOMODEL 600 SERIES

Easily installed in -dash orunder -dash. Amplifier pow-er -supply chassis may beseparated from tuner chassis

for installation flexibility and easy servicing. Utilizes 6 -tube super heterodyne circuit (2 dual-purpose tubes) with8 -tube performance . . . pulls in those distant stationswith good tone and volume. Supplied with separate 5"x 7" speaker which is installed in original automobilespeaker compartment for high fidelity performance. Neu-tral gray -tan baked enamel finish. Over-all size 4" deep

61/2" wide x 2" high. Tuner Chassis; with AmplifierChassis, 23/a, deep x 61/2" wide x 37/e" high. Shippingweight 7 lbs. WILL OUTPERFORM MOST SETS!Medal 612-12 volt Dealer Net Price 531.96Model 606- 6 volt Dealer Net Price 531.96

Airplane Style OverheadMounting under Cab Roof

ATR TRUCK

KARADIOExcellent Tone,Volume, and Sensitivity,Compact, yet powerful. Fitsall trucks, station wagons,most cars and boats. Just drill a % inch hole in roof andsuspend the one-piece unit (aerial, chassis and speaker)in minutes. Watertight mounting assembly holds anten-na upright. Yoke -type bracket lets you tilt radio toany angle.r

Ex t radio has 6 tubes (2 double -purpose),over -size Alnico 5 PM speaker for full, rich tone.easy -to -read illuminated dial. Fingertip tuning control.Volume and tone controls. 33 -in. stainless steel antenna.Neutral gray -tan enameled metal cabinet, 7 x 65/a x 4 in.high over-all. Shipping weight 101/2 lbs.Model TR-1279-12 A for 12V Dealer Net Price $41.96Model TR-12 79- 6A tor 6v Dealer Net Pr Ice $41.96

SEE YOUR ELECTRONIC PARIS DISTRIBUTORWRITE FACTORY FOR FREE LITERATURE...

ATR ELECTRONICS, INC.Formerly American Television & Radio Co

AI IC Ouolity Products Since 1931ST. PAUL I. MINNESOTA-U.S A

- - - for more details circle 12 on post card I

54

NEW PRODUCTS

semiconductor. Use of the Dynaquadreportedly has made possible a capaci-tance switch with a high order of reli-ability, low cost, small size and a widerange of operating conditions. Applica-tions of the switch include: counting,sorting and switching in industrial con-trol systems. In critical environments itprovides a non-moving, non -arcing man-ual control which can be located at con-siderable distance from the switch mech-anism. The switch works directly from105-125 vac and can handle a load ofup to 100 w. It is self contained in aplastic package 3 x 11/4 x 11/4 in. Sixleads are brought out from the package:two for power, two for the load and twoantennas for activating the switch. Tung -Sol Electric, Inc.

STEREO RECEIVER 212A 30 w FM -AM stereo receiver, the

Model RP230, is said to have a fre-quency response of ± 1 db 20 to 20.000

cps and an FM sensitivity of 0.85 Av permeter for 20 db of quieting. The modelfeatures the "Stereo -Minder" indicatorwhich lights when the station is broad-casting stereo, electronic -eye tuning, aspecial tape recorder filter which elim-inates beeps or whistles when tapingoff the air and a distinctive brushedgold panel. Price: $249.95. Bogen Com-munications Div., Lear Siegler, Inc.

CAPACITOR CHECKER 213The TE-44 capacitor checker features

a tuning eye indicator and will check

TV TIPSFROM TRIAD

NO. 19 IN A SERIES

Bill, the Senior PTM, and Joe, hisassistant, were working late.Joe fired up the next set. "Hey, Bill,"he said as he switched channels,"Barney's picture is on one channel,Fred's voice is on another, the pic-ture is washed out, the sound buzzes,sync is critical, and the picture goesnegative when I fine tune.""Sounds like AGC trouble," said Bill.He removed the antenna clip. Thesound and picture, although some-what snowy, returned to normal."There are two general types of AGCsystems;' began Bill, "the simple orderived type, and the keyed system,usually using a pentode. This lookslike a keyed AGC job. Notice that theadditional width coil winding is usedas a pulse voltage source applied tothe plate of the keyer tube. Thisspike positive andgreater than the de voltage on thescreen of the keyer. Peak -to -peakvoltages on the order of 400 to 500volts are commonly measured at theplate. The AGC system can operateonly if correct polarity and ampli-tude pulses are applied to the plate.""Isn't a separate winding on the fly-back transformer used on some setsto obtain this same positive spike?"asked Joe."Right, and a capacitor is usuallywired in series with this winding andthe keyer plate. Always good prac-tice to check this capacitor verycarefully.""Without AGC bias:' Bill continued,"the IF strip and the tuner will over-load severely, causing the symptomswe see here.""Loquacious tonight, aren't we?"said Joe smiling."Let's check the width coil second-ary;' said Bill, ignoring the remark.He reached over and switched on theever faithful VTVM. "Open;' he saida moment later."I'm on my way to the parts shelf;'said Joe.MORAL: Triad width coils arewound to produce the same polarityat the secondary (start of winding)as is applied to the primary (start ofwinding). Ask to see our ruggedWLC-9 (and others) in the familiarred and white boxes at your favoriteTriad distributor. A detailed instruc-tion sheet is packaged with each part.Write Triad Distributor Division, 305No. Briant St., Huntington, Indiana.

A DIVISION OF LITTON INDUSTRIES al- - for more details circle 41 on post card


ALLCOMPONENTS

AREMOUNTED ON

2 CIRCUITBOARDS...

in the remarkable New SONY Micro -TV

The new SONY Micro -TV is called the Television ofTomorrow. And this is especially true in servicing, forall components are mounted on two snap -out printedcircuit boards, which permit inspection or replace-ment in a matter of minutes. Or, you could send thecomplete board right to SONY, and it will be expertlyserviced and returned to you in a matter of days, atlow cost. The 8 -lb. Micro -TV, with 25 transistors,operates on its own rechargeable battery pack, 12vauto boat battery and AC. List is $229.95. Completedetails are yours for the asking. Write today.

C:01\1X77RESEARCH MAKES THE DIFFERENCE

SONY CORP. OF AMERICA514 Broadway, New York 12, N. Y.

Regional OfficesWestern: 627 South Towne Ave., Los Angeles 21, Calif,

Central: 4959 W. Belmont Ave., Chicago 41, Ill.

Please send full details on tne remarkable SONY MICRO -TV

NAME

FIRM

ADDRESS

CITY STATE ZONE

Sony Corp. of America, Dept. 514 B-oadway, New York 12, N.Y.

JANUARY 1963

- for more details circle 36 on last page

55

NEW PRODUCTS

Itcapacitors from 10 pf to 2,000 if foropen or shorted conditions without un-soldering. It uses a 20-24 Mc frequencyfor "open test," and complete "eye"closure indicates capacitor is good. Par-tial closure indicates leaky component.If "eye" remains open, capacitor undertest is defective. A 60 cps frequencyis used for "short" test; complete "eye"closure indicates a good part. A shortedpart is indicated when "eye" remainsopen. Comes complete with test leadsand mounted in an attractive gray wrin-kle -finish metal cabinet. Price: $14.95.Lafayette Radio Electronics Corp.

DRY BATTERIES 214Three do cell batteries, the 9 v rec-

tangular, the 1.5 v penlite and the 9 vround, are for use in such devices asportable transistor radios, portable taperecorders, flashlights, photographic unitsand toys. Full capacity is assured througha premium electrolyte while high outputis made possible by a patented graphite -film process, according to the manufac-turer. Quality insulation is said to pro-vide long shelf life and freshness is con-trolled through dated stock. The batteriesare supplied in self -display cartons alongwith point -of -sale promotion material

Price: $0.39, 9 v rectangular; $.10, 1.5 v,and $.49, 9 v round (suggested retail).Sonetone Corp.

REACTANCE SLIDE RULE 215The Reactance Slide Rule, has been

re -issued by the manufacturer. Since itwas first made available in 1943, over300,000 Reactance Slide Rules have beendistributed to technicians throughout the

IEEEMEET

THE BEST BRAINS,THE BEST PRODUCTS

IN THE INDUSTRYat

1 -TRIPLE -E%International Convention

and Exhibition in New York

MARCH 25, 26, 27, 28The COLISEUM at Columbus Circle& The WALDORF ASTORIA HOTEL

admission: MEMBERS $1.00; NON-MEMBERS $3.00ci". MINIMUM AGE: 18

SHOW(formerly the IRE Show)

world. The device is said to be a helpful.time -saving means for solving resonantfrequency capacitive reactance, inductivereactance, coil "Q" and dissipation fac-tor problems that cover a frequencyrange from 5 cps to 10,000 Mc. Price:$1. Shure Brothers, Inc.

CB TRANSCEIVER 216the "Messenger Two" is a complete

10 -tube, including rectifier, crystal con-trolled transceiver for use on the Citi-zens Band. Basic circuitry has beenpatterned after that of the firm's

"Messenger," but includes a number ofnew features. The unit is designed forcoverage of any 10 channels in the 23channel band, has an illuminated channelindicator, and permits instant selection ofany one channel by simply rotatingthe channel selector switch. The receiv-er section has been designed to offerincreased sensitivity and high adjacentchannel rejection. Transmitter circuitryhas been designed for more than twice

YOU CHANGEYOUR ADDRESS

notify us at 1 East First St., Duluth 2, Minn.

try to let us know in advance - (because 30days should be allowed for the change to gointo effect)

Notify us in writing- and include the addresslabel from one of your recent issues, showingyour old address and code line. (Just filing achange with the post office is not enoughfor magazines are not usually forwarded)

If your city uses a zone system, please includeyour ZONE NUMBER in your address. (You'llget faster, surer mail delivery).


WANT A WIPER TV PICTURE?

take these boosters in this caddy/pak

WANT A SHARPER TV PICTURE?

on every service call

NEW BLONDER -TONGUE CADDY/PAK BOOSTS BOOSTER SALESTV Technicians - here's a bright new profit idea fromBlonder -Tongue. Called the CADDY/PAK, it holds twoindoor TV/FM boosters-one a transistor model, theother tubed - and fits easily in your tube caddy. Theboosters are: the new all -transistor, model IT -4 Quadra-booster; and the industry's most reliable tubed model,the B -24c.This combination makes it easy for you to give your cus-tomer the right booster for any reception situation.Remember, transistor boosters provide higher gain andare more rugged, but they have one problem - overload(windshield wiper effect, loss or sync). If you use a tran-sistor booster in an area with one or more strong TV orFM signals - you may be buying too much booster. Onthe other hand, tubed boosters perform very well inthese areas.With the Blonder -Tongue CADDY/PAK you can demon-strate both tubed and transistor models in a jiffy, by con-

necting them to the terminals of the set. Either way yourcustomer gets the finest indoor booster - a Blonder -Tongue.The CADDY/PAK fits in your tube caddy. It's imprintedwith the profit -producing words - "WANT A SHARPERTV PICTURE? ASK ME." You can place it on the set you areservicing and let it sell for you. And it reminds youand all your technicians to mention boosters on everyservice call.You just can't help selling more - having more satisfiedcustomers too - because they have the right booster.Today, see your Blonder -Tongue distributor and get de-tails on how you can get a free CADDY/PAK boosterdemo kit-the sure-fire approach to boosting booster sales.

.9Pnr .n menuN</wO r

BLONDER::TONGUE9 Aabr Sr,Newark. 2 N

Canadian Div.: Benco Television Assoc., Ltd., Tor., Ont.Export: Rocke Intl. Corp., N. Y. 16 - Cables ARLAB

Home TV Accessories UHF Converters

JANUARY 1963

Master TV Systems CATV Systems CCTV Systems


57

NEW RIDER BOOKreveals latest

techniques

to simplifyservicing

dv

troubleshootingand repair

Two new books from Rider offer servicingshortcuts and methods every television tech-nician has been waiting for. You'll cut costsand call time with so many of the progressivetechniques explained in these volumes.

TV TROUBLESHOOTING AND REPAIR 2nd Ed. byRobert Middleton. Scores of the treasured tradesecrets of professional TV service henchmen arepacked into one, long awaited reference volume.This book places at your fingertips all the practicalsolutions to whip tough service problems, restoreoriginal performance quality to TV sets. It providesthe most up-to-date techniques for troubleshooting.The first chapter describes TV receiver differencesand waveforms. Each of the following chapters isdevoted to troubleshooting techniques for specificcircuit difficulties In Visual Alignment Procedures(Do you know how to check a front end's impe-

dance?) . . . Troubleshooting Sync Circuits (Canyou check for line pairing with a scope?) ... Locat-ing Sweep Troubles (Do you know how to deter-mine when parasitic oscillations are affecting sweepwidth?) . . . Faults in Video -Amplifier Circuits(Can you make Y amplifier testa on color TV re-ceivers?) . . . Checking High -Voltage Power sop-Dlies (Know how to solve raster ringing problems?)

. Troubleshooting in -The -Home (Short-cut tipsto isolate defects quickly for in -the -home repairs,accurate repair estimates) . . . Receiver Buzz -Causes and Cures (Shows how to locate buzz origi-nation fast) . . . External Interference (Can youcompute the unknown interference frequency andcorrect the defect?) . . . Instrument Differencesand Waveforms (Describes the applications andreading differences expected from various instru-ment types.)Every TV technician - apprentice or experiencedhenchman - can profitably use this vital servicetooL #296, $3.95

BASIC OSCILLATORS by Irving Gottlieb, P.E.At last, a book that takes all the mystery out ofoscillator operation in receivers, transmitters andindustrial equipment! This key circuitry -a majorstumbling block to understanding electronics - lefully explained for the first time without reetortingto bewildering mathematics. Complete descriptionsof oscillator principles, so clear that only an ele-mentary knowledge of electronics is needed, providea firm basis for complete understanding of mate-rial discussed in following chapters. The book coversoscillating elements (LC circuits, crystals, tran-sistors, tunnel diodes, thyratrone, etc.), oscillatortechniques (switching, amplification, negative re-sistance, feedback, etc.), and numerous oscillatorcircuits in actual applications, using feedback, neg-ative resistance or relaxation techniques.This unique book, through its vividly clear oscil-lator theory and practice, gives such valuable guid-ance to design or service oscillators you don't haveto memorize circuits or components. $256, $4.50

At your bookstore, parts distributor or direct10 -DAY MONEY -BACK GUARANTEE

John F. Rider Publisher Inc. ElA A Division of Hayden Publishing Co., Inc.116 West 14th Street, New York 11, N. Y

Enclosed is $ Please send:0 TV TROUBLESHOOTING & REPAIR (2nd ed.) $3.95

BASIC OSCILLATORS, $4.50

NameAddress

Uty

NEW PRODUCTS

the input power used on the CitizensBand for high reliability and extendedcomponent life. Price: $169.95. E. F.Johnson Co.

EDUCATIONAL TV 217The demonstration center equipment

is said to be designed for use with groupsof 100 or more students, when the

instructor is required to operate a num-ber of displays from a single controlcenter. This center also reportedly per-mits the instructor to select VHF, UHFor locally originated high resolution.closed-circuit television. The equipmentincludes: an 800 -line picture closed-cir-cuit TV; a central sound control fromthe tuner for speakers attached beneaththe viewers and a choice of ceiling -suspended or pedestal viewer mounts.The viewers, equipped with 23 in.screens, are 24 in. wide, 22 high and19 deep. Conrac Div., Giannini Con.trols Corp.

ANTENNA SPRINGS 218Two newly -designed mobile antenna

springs reportedly won't lose the whip.A special ferrule fitting is claimed to

give the user positive grip. Made ofstainless steel, these non -corrosivesprings adapt to the firm's Mobile VHFantennas and are rigid enough to resistwind but flexible enough to bend forlow clearances. Both a standard baseand a ball -joint to allow mounting onangular surfaces are available. G. A. M.Electronics, Inc.

(Add 15c for .093 pins)

Send for NEWFREE CATALOG ;7962

with oscillatorcircuits

Citizen Band Class "D" CrystalsCITIZEN BAND CLASS "D" CRYSTALS

9rd overtone - .005% tolerance - tomeet all FCC requirements. Hermeticallysealed HC6/U holders pin spacing..050 pins. (Add 15c per crystal for .093pins).

All 23 channels in stock. 26.965, 26.975,26.985, 27.005, 27.015, 27.025, 27.035, 27.055,27.065, 27.075, 27.085, 27.105, 27.115, 27.125,27.135, 27.155, 27.165, 27.175, 27.185, 27.205,27.215, 27.225, 27.255Matched crystal sets for ALL CB units (Specify equip-ment make and model numbers) $5.90 per set

$2 95EACn

CRYSTALS IN HC6 U HOLDERS

SEALED OVERTONE

.486 pin spacing - .050 diameter - .005°. tolerance15to30MC $3.85 ea.30 to 45 MC $4.;0 ea.45 to 60 MC $4.50 ea.

FUNDAMENTAL FREQUENCY SEALED

From 1400 KC to 2000 KC.005% tolerance ...._____ $5.00 ea.From 2000 KC to 10,000 KC,any frequency, .005% tolerance $3 50 ea.

RADIO CONTROL

Specify frequency. .05 pins spaced$2 95 ea.

QUARTZ CRYSTALS

FOR EVERY SERVICE

All crystals made from Grade"A" imported quartz --groundand etched to exact frequencies.Unconditionally guaranteed!Supplied in:FT -213 holders MC -7 held*.Pin spacing Si" Pin spacing %-

Pin diameter .093 Pin diameter .125

CRIA/AR. balder. FT -171 lialier

LP:21 .125Pin spacing sa"Banana pins

MADE TO ORDER CRYSTALS . . . Specify balder wanted1001 KC to 1600 KC: .005% tolerance 24.50 as.1601 KC to 2600 KC: .005% tolerance 22.75 es.2501 KC to 9000 KC. .005% tolerance 22.50 es.9001 KC to 11,000 KC: .006% tolerance SS SO es.

Amateur, Novice, Technician Band Crystals

.01% Tolerance . . . $1.50 ea. - 80 meters (3701-3749 KC) 40 meters (7152-7198 KC), 15 meters(7034.7082 KC), 6 meters (8335-8650 KC) within 1 KCFT -241 Lattice Crystals in all frequencies from 370 KCto 540 KC (all except 455 KC and 500 KC) 50e ea.Pin spacing 1/2" Pin diameter .093Matched pairs - 15 cycles $2 50 per pair200 KC Crystals $2.00 so.455 KC Crystals500 KC Crystals100 KC Frequency Standard Crystals inHC6/U holdersSocket for FT -243 CrystalDual Socket for FT -243 CrystalsSockets for MC -7 and FT -171 CrystalsCeramic Socket for HC6/1.1 Crystals

$1 25 we.$1.25 ea.

$4.50 ea.15c ea.15c ea.25c ea.2Ck ea.

ENGINEERING SAMPLES and small quantities for prototypesnow made at either Chicago or Fort Myers plants with 24 hourservice. IN CHICAGO. PHONE GLadstone 3-3555

IF YOUR PARTS DEALER DOESN'T STOCK Texas Crystals,order direct and send us his name.

TERMS: All items subject to prior sale and change of pricewithout notice. All crystal orders must be accompanied by check,money order or cash with payment in full.

RUSH YOUR ORDER NOW TO

hTEXAS CRYSTALSDiv. of Whitehall Electronics Corp.

1000 Crystal Drive, Fort Myers, Florida Dept. T-9Phone WE 6-2'00

FOR SHIPMENT VIA FIRST CLASS MAIL AT NO EXTRACOST ATTACH THIS ADVT. TO YOUR ORDER!


ELECTRONIC TECHNICIAN58


NEW BOOKS

THE ELECTRONIC MUSICAL IN-STRUMENT MANUAL 4th Edition.By Alan Douglas. Published by PitmanPublishing Corp. 278 pages, hard cover,$8.50.

The revised 4th edition of this bookis, as the other editions, excellent. Itcontains a description for virtually everytype of electronic instrument circuitcommercially available. The technicianplanning to do service work in thisfast-growing field should definitely readthis volume. Complete schematics ofpopular instruments are generously in-cluded with circuit descriptions. Circuitinsets include Hammond, SolovoxClavioline, Novachord and others. Theauthor explains the relationship betweenelectrical tone colors and their acousticcounterparts. No electronic musical in-struments engineer or serviceman shouldbe without a copy of this book for hislibrary.

CB RADIO MOBILE HANDBOOK. ByJim Kyle. Published by Horizons Pub-lications, Inc. Approximately 110 pages,soft cover. $2.95.

Here's a basic CB mobile radio bookthat should be of great value to the CBuser as well as the technician. Many tipsare given on CB radio and antenna in-stallation. Circuits of special interestare described, test equipment is discus-sed and CB regulations and prodceduresare outlined. Some of the noise problemsencountered only in mobile work aredescribed along with troubleshooting andprocedures to locate and eliminate them.

SINGLE SIDEBAND FOR THE RA-DIO AMATEUR. Published by theAmerican Radio Relay League. 224Pages, soft cover. $2.

This volume has been compiled by theeditors of QST magazine from articleswhich have appeared in that magazineon the SSB equipment. It is a completereference, and although written for theradio amateur, should interest the av-erage technician engaged in communi-cations service work or those contemplat-ing two-way service work. History, con-struction, theory and practice are all wellcovered.

RADIOTELEPHONE LICENSE MAN-UAL. By Woodrow Smith. Published byEditors and Engineers Ltd. Estimated 200pages, hard cover. $5.75.

Those working for a radiotelephonelicense to expand the range of theirbusiness should difinitely purchase oneof the study guides available to preparefor the test. This manual is one of manyon the market and will provide all thenecessary information to anyone whopossesses a basic knowledge of electron-ics. No additional books should be re-quired to make any portion of the bookclear. The book is written in a questionand answer format and divided into sec-tions starting with Basic Law, BasicRadiotelephone Theory, etc.

JANUARY 1963

11111111111111111111111111111/

FIFE;

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El= 4ii&Amaism-1:prPNIP

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with new

Winegard Yagi CouplersNO ROTOF OR SWITCHES, "SPECIAL ANTENNAS"

OR EXPENSIVE "MIX11.6 NETWORKS" NEEDED!

Now Winegard yagi couplers giveunlimited flexibility in put-ting together any combina-tions of antennas on thesame mast with only a singledown -lead to the TV set oramplifier . . . without inter-action, loss or mismatch.For example-you can cou-ple two, three, four, or morecut channel yagis to eachother or to any VHF broadband or all channel antenna.You can couple an FM an-tenna and a TV antenna. Infact, you can do any cou-pling job. You always useone coupler less than thenumber of antennas beingcoupled. It's inexpensive,

you

fast and eliminates need for rotors ormixing networks.Winegard yagi couplers CA -2 throughCA -I3 are individually tuned to each of

the 12 VHF channels. Cou-pler Model CA -2I3 will cou-ple any 2 antennas, even all -channel antennas. Eachcoupler has 3 no -strip term-inals for 300 ohm twin lead-2 antenna input terminalsand one output terminal forconnecting the down lead toanother coupler, a TV set oramplifier. Coupler chassis ishoused in high -impact poly-styrene cover, tough, water-proof, won't short. A stain-less steel strap is provided forfast installation, Couplermodels list at $5.50 each.Write for bulletins or askyour Winegard distributor.

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NEWS,mommismommum.

I V OF THE INDUSTRY

Southland Sound Corp. is the newname of the former Commercial SoundDiv., Kierulff Sound Corp. ThomasHackett and Robert Foster, new ownersof the public address, intercom andbackground music installation sales andservice distributorship, are former man-agers. Kierulff Sound Corp. continues tooperate as a Hi-Fi Component sales andservice outlet.

Radio Corp. of America set all-timesales and earnings records for the firstnine months of 1962, according to chair-man David Sarnoff and president ElmerW. Engstrom. After tax earnings in thethird-quarter increased 66 percent overthe same quarter in 1961. Profits aftertaxes for the first nine months rose 44percent to $34,300,000 from $23,800,000in the first three quarters of 1961. Thiswas achieved on record sales of $1,-265,500,000, up 16 percent from the$1,090,100,000 in the comparable perioda year ago.

Hi -Lo Mfg. Co., Chicago, purchasedthe TV antenna and accessories businessof Amphenol-Borg Electronics Corp. Thesale includes patents and all machineryand equipment for manufacturing theantennas and accessories. In marketingthese products Hi -Lo will be free to usethe name "Inline" formerly used byAmphenol-Borg. Identification with thename Amphenol will be dropped, how-ever.

Olson Electronics opens a store inSouth Hills, Pittsburgh. This is the sec-ond Olson Store in the Pittsburgh areaand bringing the total of stores open to13. This store is completely self-service.There is no storage room nor backroom. The entire floor area is devotedto open type display of everything frompicture tubes to small parts. Herb Davisis the manager of the new store.

Oxford Electric announces the ac-quisition of all of the capital stock ofGlobe Tool & Die Co. and its affiliate,Globe Instrument Co. of Southbridge,Mass. The purchase price was not dis-closed. It is stated that the present man-agement at Southbridge will be retainedand integrated with other Oxford opera-tions.

Electronic Representatives Assn. willdiscuss, "Where is the Audio IndustryGoing?-What is the Future of Dis-tributor Selling? - and Can You Teachan Engineer to Sell?" These are only afew of the over-all industry problems thatwill be taken up in workshop sessionsat the 1963 ERA 4th Annual Conven-tion to be held in San Francisco fromJan. 22 through the 25th.

Olympic Radio & Television SalesCorp., selects Garrett Distributors, Inc.,

Toledo, Ohio as distributors for north-western Ohio.

Tung -Sol Electric Inc., reports a re-ceiving tube promotion in which it isoffering, at reduced prices, a 3 -piece set"Yogi Bear" "Boontonware" melaminedishes to purchasers of its receivingtubes. The non -breakable tumbler, bowland plate, regularly a $2.98 retail value,is available for $1.75 and five Tung -Solreceiving tube carton flaps.

Entrol, Inc., manufacturers of com-munity television systems and equipment,moves to expanded quarters in Mont-gomery Industrial Park, Silver Spring,Md.

Zenith Sales Corp. reports that morethan one million Zenith television re-ceivers have been produced and soldso far during 1962, the company's fourthsuccessive million -plus TV set year."As a result," according to presidentL. C. Truesdell, "Zenith will achievein 1962 the greatest percentage of totalindustry sales in the company's historyand further strengthen our position asnumber one in TV sales in the intenselycompetitive television industry."

Olympic Radio & Television Div. in-troduces a 19 in. portable television, saidto be the first U.S. designed set to beproduced in Japan for a major manu-facturer. Model 9P2I, ' The Rosalind,"follows by a few months delivery of the

NOW AVAILABLE!

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SI and S2 551 and 552

GAM SPRINGS WON'T LOSE YOUR WHIPISpecial ferrule fitting on GAM springs gives youpositive grip. Stainless steel constructed, thisrustproof spring adapts itself to all existingGAM mobile VHF antennas and is rigid enough toresist wind but flexible enough to bend for lowclearances. 5111 and $52 differ from SI and 52only in that the ball joint allows mounting onangular surfaces.

LIST PRIMSt (3/111. hole), 52 (1/2" hole) S 7.50Sit (3/1. hole), 552 (1/2^ hole) $10.00

See your d' "butor or write GAM direct. Prices avoiloblefor different combinations of Springs and Antennas.

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ELECTRONIC TECHNICIAN60

first I9 -in. table models produced forOlympic in Japan. Both models weredesigned by Olympic engineers in theU. S. for production by Nippon Colum-bia, Co., Tokyo. Model 9P21 featuresfront -mounted speaker and controls, a

40 in. telescopic antenna, hand -wired 3i-f chassis, 19,000 v picture power, ad-jacent channel trap and high -gain framegrid tuner. Price is $129.95.

Electro-Voice, Inc., reports that al-though sales for the first six months offiscal 1962-63 were nearly that of thesame period of last year, expenses, par-ticularly those in the areas of manufac-turing and tooling, turned what wouldhave been a profit into a small loss.

Sylvania International Div., GeneralTelephone & Electronics InternationalInc., receives President Kennedy's "E"award for excellence -in -export andwas cited for its 20 -fold growthsince World War II. The "E" award,revived last year is designed to honorAmerican companies which have de-veloped exceptional selling effortsabroad. Sylvania International was creat-ed shortly after World War II, and sincethen has increased its export businessby 20 times. In the past two years, thedivision has doubled its export sales.

Matthew Stuart & Co., Inc., announcesa national promotion on the "PhonoTrix 88B." Matthew Stuart intends tospend over $300,000 in the next sixmonths to establish the "88B" as thestandard for quality in the sub -miniaturetape recording field, according to com-pany officials.

Regency Electronics, Inc., announcesthe formation of a new subdivision ofthe Electric Equipment Div., to handleconsumer products private label manu-facture. Until recently, the firm's ac-tivity was primarly concentrated on theengineering and manufacturing of itsown products and for Armed Forcesagencies. Regency reportedly is pres-ently in full production on contracts fora large number of private label elec-tronic receivers. The new subdivisionwill be headquartered at the Indianapolisplant.

Raytheon Co., announces that TV andradio service dealers will have an op-portunity to earn toy road racing setsas Christmas gifts from Raytheon tubedistributors. The electric toy sets, whichare being sold nationally at $29.95, willbe offered as incentive prizes to servicedealers with the purchase of Raytheonreceiving tubes. Included in the Strom-becker International Road Racing Setsare two scale model racing cars, a Jaguarand a Ferrari Testa Rosa, 13 sections oftrack that create a figure 8 cross -over.and individual throttle controls for twooperators. Details on the racing carChristmas gifts are available from allthe firm's franchised tube distributors.

Hickok -RD Div. appoints Berndt andAssociates, 6322 N. Milwaukee Ave.,

Chicago 46, Ill. as representative for theHickok Electrical Instrument Div. TheBerndt firm's territory encompassesnorthern Illinois, northern Indiana andsouthern Wisconsin.

Sylvania Home Electronics Corp.appoints Strawn Distributing Co., Knox-ville, Tenn., as franchised distributor.The Strawn company will be respon-sible for the distribution of Sylvania tele-vision sets, radios, and stereophonichigh fidelity phonographs in 16 Ten-nessee counties. Robert C. Strawn ispresident of the distributorship.

National Raido Co. announces theappointment of the Harrison ElectronicsCorp., industrial electronics distributor

in New York City, as their authorizedcaptive -hardware distributor. Harrisonwill carry National's complete line ofstainless steel captive nuts and studsin depth for distribution to accounts inmetropolitan New York City andnorthern New Jersey.

Olympic Radio & Television Div.,Lear Siegler, Inc., names Depot Mer-chandise Mart Ltd., Honolulu, as dis.tributor for the state of Hawaii. Depotwill handle Olympic's line of 1963 radio,television and stereo high fidelity prod-ucts. Principals of Depot Merchandiseinclude George J. Fukunaga, president;Benjamin Fukunaga, vice president;Hideo Kimura, secretary, and FrancisSato, treasurer.

BOOST YOUR BRITENER SALESwith these

SIX MAGIC WORDSfrom SitmitReweL

WOULDYOU LIKE ABRIGHTERPICTURE?

That's a question with only one possible answer-YES.Every customer wants a better, brighter picture . . . butdoesn't realize how easy it is to get one.

When you say you'll brighten the picture-When you quotethe low cost-you've sold the customer.

Don't sell Briteners-sell Brighter Pictures!On every service call, remember to use Perma-Power's 6Magic Words-Would You Like A Brighter Picture? You'llsell a 12 -pack of Briteners almost as fast as you can sayPerma-Power!

fergietd,-17oweit, c 0 M PAN Y- 3104 N. Elston Ave.- Chicago 18for more details circle 30 on post card

JANUARY 1963 61

I ONCE TOOK A

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- for more details circle 26 on post card

. . . MOBILE ANTENNASContinued from page 34

and a different antenna for trans-mitting. Automatic switching maystill be necessary in transceivers,however. This is easily accomplishedby connecting a coaxial relay to thetransmitter function switch. In thismanner the transmitting antenna willbe connected to the unit while inthe transmit mode to the receivingantenna when listening.

Base stations also have the ad-vantage of being grounded. It is notonly a good safe practice but inmany cases will improve communi-cations if the transmitter and re-ceiver are connected to a goodearth ground.

A final word of warning: Re-member, you're not working with60 cycle house current. Haywiresetups, poor connections, and im-proper impedance matching canmean the difference between barelyusable communications and a topnotch system which fully satisfiesyour customer.

. . . SYNC TROUBLEContinued from page 38

hunt components are shown in Fig.

s/71(4K electroniccomponents

Manufacturing and Exporting Lines,Sockets, Switches, Plugs and Jacks,

Cable Adapter, Binding Parts,Connectors and Holders

Please send us your information. Our catalog covering all therange of our manufacturing items will be sent to you soon.Any samples or drawings from you will help us to furnish youwith your precise parts.

SHOWA MUSEN KOGYO CO., LTD.No 24, 5-Chome Higashi Togoshi Shinagawa-ku, Tokyo

Tel: 782.2101-7 Cable: "Showamusen" Tokyo

3 for regular and synchroguide sys-tems.

Vertical and Horizontal sync loss-If both vertical and horizontalsections are affected, the fault prob-ably lies in the sync section. In mostcases manipulation of the hold con-trol should sync the picture mo-mentarily. If rotation of the holdcontrols will not allow the pictureto roll up and down, or in horizon-tal problems cause blanking barsto slant to the left and right, theoscillator is probably at fault.

Complete loss of sync in eitheror both sweep section can be tracedto almost any point in the syncpath. In most cases, however, ifonly one oscillator is out of sync thetechnician should concentrate onthe input circuits of the associatedoscillator.

Vertical jitter-This is usually aproblem encountered in the verticaloutput circuit. If the output circuithas been relieved of suspicion, how-ever, light capacitor leakage and theintegrator circuit should be suspec-ted.

Horizontal jitter-Horizontal jit-ter can usually be corrected by care-ful adjustment of the ringing coil.Component values which have

SEETHE NEW

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at

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changed slightly should also be sus-pected. If all efforts fail, increasethe value of the resistor in serieswith the ringing coil about 50 per-cent. On synchroguide systems, thecircuit Q may be reduced by shunt-ing a 27 K to 47 K resistor acrossthe phase coil. (See Fig. 3.)

Critical horizontal sync-Almostany component in the horizontalsync or AFC section can cause criti-cal sync. A careful componentcheck is the easiest way out. Don'tleave the phase detector diode forlast-they are frequently at fault.If you have replaced these diodes,or suspect tampering, make surethey are not installed backwards.Often a set will sync in but onlylightly when these diodes are re-versed.

Critical vertical sync-Again,shift in the value of components inthe vertical oscillator input circuitryor slight capacitor leakage is atfault. Sometimes the best methodto locate these faults is to changethe suspected components.

Christmas tree effect-S o m etimes called optical effect, is theresult of the horizontal oscillatoroperating far from its normal fre-quency. The AFC circuitry is aprime suspect in this type of mal-function. In some cases, however,loss of sync combined with improp-er adjustments will cause the christ-mas tree effect.

In any case careful, painstakingtroubleshooting will lead you to theproblem.

. . . TEST INSTRUMENTSContinued from page 43

CRYSTAL CALIBRATORE. F. Johnson Crystal Calibrator,Model 250-38 at $18.95- Here'san instrument that is very familiar

to amateur radio operators, butsomehow hasn't gained much popu-larity with regular technicians. Ev-

ery shop, especially those engagedin two-way radio service needs anaccurate frequency standard.

Amateurs use, in most cases, a100 kc crystal oscillator rich in har-monics in conjunction with their re-ceiver. The signals can then beheard every 100 kc as the dial isturned.

Technicians can use the crystalcalibrator in a similar manner. Rea-sonably accurate test equipment -transmitters and receivers can bechecked and calibrated with the aidof a beat frequency listening device-such as a grid dip meter, the re-

ceiver under test or an auxiliary re-ceiver.

The unit comes completelyequipped with a 100 kc crystal anda 6BH6 tube. If the unit is mountedin a receiver or existing test equip-ment, power is drawn from the exist-ing equipment. Only 2 ma between150 v and 300 v is needed for B+and 6 v for filament power.

Special quick connectors are sup-plied with the unit to make the in-stallation easier. The unit is verycompact so its installation is simpli-fied. It measures only 3443 x 21/2 x1' in.

TWO-WAY RADIOcommunications eq ipmenl

INF F11 FOR:NOOKS

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A SPECIALLY DESIGNED DISPATCHER'S CONSOLEPROVIDES EFFICIENT, INSTANT CONTROL OVER4 RADIO CIRCUITS.

1) Police messages are dispatched to patrol cars,motorcycles, police boats, and other vehicles over a150 Mc mobile relay system of advanced design. A310 ft. antenna height on relay transmitter provides40 mile car -to -car communications. Two-way orthree-way versatility by selection at control console.

2) A Local Government frequency for fire trucks,rescue squads, electrical trucks, and other mainten-ance and official vehicles.

19 88

3) The Inter -City circuit on 155.37 Mc has specialrelay provisions permitting messages from othercommunities in Dade County to be simultaneouslyre -transmitted to Gables police vehicles enablingeach mobile unit to receive direct county -widebroadcast.

4) A completely independent stand-by base stationfor Police and Local Government fre-

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.1kr "'o=noDESIGNERS AND MANUFACTURERS CI RADIO COMMUNICATIONS EQUIPMENT

COMIIIIICATIOL COMPANY, Inc.10,UI0 19111 CORAL GABLES. MIAMI 34. FLORIDA

JANUARY 1963- - for more details circle 18 on post card

63

1962 Index ofMANUFACTURERS TECHNICAL DIGEST

AIRLINE:

TV -Chassis Models WG-4235-A and WG-4335A-Oscillator Coil Adjustment 5/62-20

TV Models WG-5277A, -8A, -9A, 5377, -8A, -9APoor Linerarity 9/62-12

ANDREA:

Chassis VT-123-Antenna Terminal BoardConnections 1/62-22

DUMONT:

Color TV Chassis C -I00 & COI -CRT Tempera-ture Adjustment 5/62-20

TV, Chassis 120604-A, Arc SuppressionCapicitor 5/62-20

Tuner Chassis 120482B, C -Dial Alignment 9/62-12

ELECTROHOME:

TV Chassis 19, 21 & 23 in. Models - FocusAdjustments 6-62-20

Connections 9/62-12

lator Adjustment 11/62-20

EMERSON:

TV Models 1626 Through 1678-Size Adjustment 6/62-20Record Changer Model 81981 - Tone Arm Adjust-

ments 8/62-16Model D -I900 B Record player - Cartridge Replace-

ment 11/62-20

Stereo Phonograph Model Sierra MK1-Speaker

'62 19 & 23 in. TV Models - Horizontal Oscil-

GENERAL ELECTRIC:GE Canadian, Chassis M575-Audio Output

Transformer Connections 1/62-22Portable Phonographs RP1500 series-Reducing

Acoustical Feedback 2/62-20TV Chassis MW-Correcting UHF Tuning Problem 3/62-18TV Chassis M6-Remote Control Operation 4/62-22TV Chassis M571 - Drive Line Elimination 5/62-20Remote Transmitter Model RW 362-Transmitter

Alignment 6/62-20TV Color Chassis "CW" Series-Production Change 7/62-16TV Chassis M579 -Z Code Production Changes 8/62-16M4, M5, M6, U4 and U5 Chassis-Testing Diode

phase detectors 10/62-23Radio Models 865, 930, C405 & T105 - Cor-

recting Excessive Volume 11/62-20

HOFFMAN:

TV Model 9003-Linearity on Replacement CRT's 5/62-20

MAGNAVOX:

Model 3MU370 - Shorted Antenna Terminals 1/62-22Model MV366 - Lead Dress Hum 1/62-22TV Chassis 35, 36 or 38 Series 2/62-20TV Chassis 38 Series - Production Changes 3/62-18TV Chassis Series 35 - Production Changes 4/62-22Hi-Fi Models IST274, IST278 and 2ST274 Filament

Connections for F -M Multiplex Adapter 5/62-20

Magnavox Adapter 70-01-10-Correcting Back-ground Noise 7/62-16

MOTOROLA:

TV Chassis TS -430B-03 through C-02-ProductionChanges 2/62-20

TV Chassis TS 581 Series - Removing Coil Shields 3/62-18Auto Radio 25TMXD 55555 -Power Transistor

Replacement 4/62-22TV Remote Receiver, Model TRR-1-RES-PAC and

CAP -PAC Repair 5/62-20Tv Chassis 88-12-Wrong Capacitor Installation 7/62-16TV Chassis TS -586 Code A -01 -to reduce vertical

Frequency Drift 7/62-16TT305YB VHF -UHF Tuner - To Eliminate Possible

Regeneration 8/62-16IT3OYB VHF -UHF Tuner Elimination of Drift

Caused by Moisture 8/62-16Chassis M579 - Buzz in Sound 8/62-16TT303B VHF Tuner - Improved Oscillator Stability 8/62-16Chassis M579 - Video load Replacement 9/62-12Chassis TS -568A-06 Reducing Busy Background 12/62-16

PACKARD BELL:

TV Chassis 88 -12 -Production Changes 1/62-22TV Chassis V8-3, -8 - Prevent Yoke Shorting 2/62-20TV Combination Chassis Model 23DK2-Separate

Radio Operation and Production Changes 3/62-18Television Chassis No. 88-12-Production Changes 4/62-22TV Chassis 88-12-Wrong Capacitor Installation 7/62-16Multiplex Decoder - Improve Stability, separation,

distortion and noise 10/62-23Color TV Chassis 98C6 - Loss of Video & Sync 11/62-20

PHILCO:

TV Chassis 12N54, Models 4850 and 5854 Install-ing Remote Control Kit 1/62-22

TV Chassis 9L37, 9L38, 9L60 and 10L60 - Recom-mended CRT Replacement 1/62-22

TV Chassis 12N53, 12N54 - Auxiliary Bright-ness Control Adjustments 2/62-20

TV Chassis 12N50 Series - Production Changes 3/62-18Radio Model T-902 - Capacitor Addition 6/62-20RK-1 Reverb Kit - Improved Bass Performance 8/62-16Chassis TT -82, -83, -84--Hot Cabinet Check 10/72-23

RCA:

TV Chassis KCS 136 Series - A -C input Tap 1/62-221962 23 -in. TV -Automatic Tone Balance 2/62-20Tape Recorder Model I-YB-11 Head Magneti-

zation 5/62-20Remote Control Unit - Lead breakage on Oscilla-

tor Coil 7/62-16TV Chassis KCS 136YL - Production Change 11/62-20Color TV CTC 10, 11 and 12-Agc Noise Stabili-

zation 12/62-16

SYLVANIA:

Chassis 546-1, -2, -3, -4, -5, Code 6 & 8 - Re-liability 2/62-20


Code CO3 Revision -To Incorporate Latest Cir-cuits 7/62-16

TV Chassis 546-1, -2 - Production Changes 9/62-12Model 1ST621 - Correcting Drift 12/62-16

TRUETONE:

TV Model No. 2DC1278 A -Pin Cushion Effect 4/62-22

WEBCOR:

Tape Recorder Model 2207 - Power SupplyChanges 1/62-22

Tape Recorders, all models - Stalled Motors 4/62-22Tape Recorder Model 2208 - Loose Transport

Keys 5/62-20Tape Recorder, Model 22-2-1, Correcting Rewind

Slippage 6/62-20Tape Recorders Model 22-2 and 2202-1A-

Possible Switch Arm Breakage 7/62-12Record Changers -Damping to Prevent Record

Groove Skip 9/62-12

WESTINGHOUSE:

TV Chassis V2416-6, 7, 9-"Instant On" power Cir-cuit 2/62-20

TV Models With "Mobile Sound" - Circuit Oper-ation 3/62-18

Portable Stereo Phono Chassis V-2508-4-ArmlockWiring 4/62-22

Record Player Chassis V-2515-1-Speaker Con-nections 6/62-20

Phonograph Model H-71Mpl - Cartridge Produc-tion Change 9/62-12

ZENITH:

16H28 Chassis -Reject Switch 7/62-16

SPEAKTO OUTSTANDING

ELECTRONICS ENGINEERS,SCIENTISTS, PHYSICISTS

at

1-TRIPLE-E%International Convention



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Model 202-C(Counter Modell $12995

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MODERN EYE -STOPPING TESTERS ...TOPS

in PERFORMANCE ... QUALITY ... and VALUE

Here is everything you want in self-service tube testers atdown-to-earth prices. MORE VERSATILITY-Tests emission,shorts and gas of over 1200 tube types including the eerylatest NUVISTORS, NOVARS, COMPACTRONS, etc.... alsotests fuses, pilot lights, 6 and 12 volt auto rzdio vibrators, alltype batteries under load. SMARTER LOOKING-Moderncabi-net design finished in a r ch green and white color combina-tion with gold trim ... Eje-stoppers in any location-willattract do-it-yourself customers as never before and sell tubesin a big way. MORE QUALITY FEATURES-Completely self-service ...Only two easy -lo -use controls are required to testany tube... Easy -to -read cuick flip tube charts list over 1200tube types... Engineered to accommodate new tube types asthey are introduced... Etched aluminum panel always retainsits handsome appearance...63 phosphor -bronze berykiumtube sockets assure posit ye contacts and long life.Replace old self-service tube testers with Mercury testers andspark -up your present locations... place them in new loca-tions and be assured of tie greatest profit results.

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MERCURY ELECTRONICS CORPORATION, 111 ROOSEVELT AVENUE, MINEOLA, NEW YORK

JANUARY 1963- - for more details circle 28 on post card

65

NEW 4 -WAY

POCKET illa real "working partner"

for removing backs of TV sets

and installing antennas

1 It's a 1/4" nut driver!Fits Parker-Kalon screws.

3 It's a No. 1Phillipsscrewdriver!

Double -end bladeinserts in 7/16" hexopening. lust pushit in or pull it out !Patented springholds it firm.

4It's a 3/16"slotted screwdriver!

Genuine Xceliteplastic handle -shaped andbalanced forworking ease.Equipped withpocket clip.

2 It's a 7/16"nut driver!Ideal forantennainstallations.

Ask to see"No. 600"next time youpick up parts ...

XCELITE, INC. 14 Bank St., Orchard Park, N Y.

Canada: Charles W. Pointon, Ltd., Toronto, Ont.


66

FREE LITERATURE

SEMICONDUCTORS 300A quick Reference Guide lists this

company's complete line of silicon rec-tifiers and both power and switchingtransistors. The guide gives electricalspecification on all the different types.Included under silicon rectifiers are lowcurrent types from 500 to 750 ma ina standard JEDEC DO -1 outline and incold -welded subminiature case construc-tion; medium current types from 20 to35 amp in JEDEC DO -5 outline and inpressfit construction; and high currenttypes rated at 70 amp in a JEDEC DO -8 outline. Listings for transistors includeaudio, rf and computer switching types,and 5 amp and 15 amp power transistors.Tung -Sol Electric, Inc.

VIDEO TAPE 301

Ups on how to splice video tape formaximum recorder performance are pre-sented in the latest of a series of semi -technical bulletins. Designed specificallyfor video tape editors and recorder op-erators, the new bulletin, entitled, "Vid-eo Tape Splicing," discusses the mostcommon errors made when splicing videotape and how they can be avoided. Min-nesota Mining and Mfg. Co.

EUROPEAN TUBES 302More than 1200 available European

tube types are listed in bulletin #15. Thefour -page listing contains types andprices representing all leading Europeantube manufacturers and suppliers. StateLabs, Inc.

COMPONENTS 303Components Catalog 200, a 16 -page

book gives full price ad product in-formation on the firms distributor lineof controls, switches, ceramic capacitors,and "PEC" packaged circuits. In additionto detailed replacement data on over 1815components, the catalog includes fulldescriptions of the contents of 15 kits.The catalog also contains control tapercharts, showing standard resistancecurves and standard tapped resistancecurves. The book is completely indexedfor easy use. Centralab, The ElectronicsDiv. of Globe -Union Inc.

EDUCATIONAL TV 304A kit containing detailed information

on an educational television operatingconsole as well as additional equipmentneeded for a complete system is avail-able. Included in a kit are a six -pagetechnical brochure describing the con-sole, a copy of a typical proposal for acomplete ETV system, a capabilitiessole, a copy of a typical proposal for aguide for estimating price, as well asother data. El V Sales, General ElectricCo.

TEST EQUIPMENT 3051 his equipment catalog, a 20 -page

book, is done in two colors and measures7 x 10 in. It lists features, specificationsand prices of the complete line of the

firm's Test Equipment. Precision Ap-paratus Co., Inc.

PACKAGE EXPRESS 306These publications outline a nationwide

package express service. Specific datacovered includes sample rates, shippingregulations and advantages. GrayhoundPackage Express.

SOLID LUBRICANT 307The principal features and perform-

ance characteristics of "Moly-Spray-Kote," a new aerosol dispensed solid lu-bricant, are described in this bulletin.The bulletin describes the advantages ofsolid lubricants in difficult lubricationassignments including the eliminaton orreduction of galling, seizing, fretting andwear -in damage. Tables and graphs pre-sent test data on corrosion resistanceand wear life. contrasting the perform-ance of the new lubricant with sevencompetitive products. Alpha-MolykoteCorp.

PICTURE TUBE GUIDE 308A television picture tube interchange-

ability chart, includes 54 "universal"tubes which replace a total of 217 types.The guide contains the type number ofthe tube to be replaced, the number ofthe firm's tube that replaces it, and akey to the information needed to effectthe replacement. The interchangeabilityguide can be used as a counter or wallchart, or may be folded into pocket size.Sylvania Electronic Products, Inc.

METERS 309This 16 -page brochure features over

1300 panel meters of various sizes, styles,types and ranges all carried in stockand available from electronic distribu-tors. Voltmeters, ammeters and micro -ammeters in sizes from 11/2 in. upthrough 6 in. are reviewed. SimpsonElectric Co.

TERMINALS AND CONNECTORS 310Described and pictured is an entire

line of non -insulated single -grip termi-nals, insulated single -grip terminals, non -insulated double -grip terminals and in-sulated double -grip terminals. Also de-scribed and pictured are crimping tools.Various service kit assortments of con-nectors and terminals for automotive,appliance, electrical and general-purposeuse are also shown. Vaco Products Co.

INDUCTORS 311A 10 -page folder outlines a series of

air core inductors designed especially forthe amateur rig or for prototypes of RFtransmission equipment. The folder givestechnical data on the coils which maybe used for pi output circuits, conven-tional LC output circuits, interstage andoscillator circuits. Illumitronic Engineer-ing Corp.

HI Fl LOUDSPEAKERS 312Catalog 165-H covers all technical

and styling details of the line of highfidelity loudspeaker and headphoneequipment. An introduction discussesthe arguments for "slim" speakers as

opposed to the normal bookshelf size.There also is a section on headphoneaccessory products. Jensen Mfg. Co.


CAN YOU SOLVE THIS MYSTERY?

JANUARY 1963

(Using the clues below, identify the Company that offers you the industry's best service)

Service technicians-and set manufacturers, as well-use this company's capac-itors oftener than any other brand.

Providing the right sizes, styles, ratings, mountings, this company offers theindustry's most complete capacitor line.

Replacements for new capacitors in latest model sets are promptly made avail-able to the service technician.

A continuous research program, employing a staff of over 500 scientists, engi-neers and technicians, assures our ability to keep up with new capacitor needs.

'Guaranteed for performance and dependability, every type of capacitor wemake is double-checked by our rigid quality control program.

Unequalled service aids include replacement guides, wall charts, service manuals,

capacitor calculators, and other technical helps which simplify your job ofcorrect capacitor selection and replacement.

Effective posters and advertising mats are available to you as part of ourcustomer relations program for dealers.

WHO ARE WE ? If you still don't know the answer, read the initial letterof each of the sentences above. This is the name that stands for the most com-plete and best quality line of capacitors, unsurpassed service help, continued

technical assistance-and less call-backs for our friends, the service technicians.- - for more details circle 38 on post card

67

ADVERTISERS INDEX

Aerogap Corporation 17 Euphonics Corporation 52 John F. Rider Publisher 58

American Telephone 8 Telegraph Co. 51 G.A.M. Electronics, Inc. 60 Sarkes Tarzian Semiconductor Div. 10

GC Electronics Co. 3 Sarkes Tarzian Tuner Service Div. 4Amperex Electronic Corporation 19-20

I -Triple -E 56, 62, 65. 68 Sencore Service Instruments Corp 45ATR Electronics, Inc. 54

International Resistance Co. 2nd Cover Showa Musen Kogyo Co., Ltd. 62

Blonder -Tongue 57

Jensen Industries, Inc. 62 Sonotone Corporation 8

Bussmann Mfg. Company 14

P. R. Mallory 8 Co., Inc. 53 Sony Corporation of America 55

Castle TV Tuner Service, Inc. 50Mercury Electronics Corporation 65 Sprague Products Company 7

Centralab, the Electronics Div. ofGlobe -Union, Inc. 9, 11 MLIticore Sales Corporation 50 Sprague Products Company 67

Clarostat Mfg. Co., Inc. 49 Perma-Power Company 61 Standard Kollsman Industries Inc. 3rd Cover

Communications Company, Inc. 63 RCA Citizens Band 47 Texas Crystals 58

Delco Radio Division 21 RCA Institutes, Inc. 18 Triad Distributor Division 54

EICO Electronic Instrument Co., Inc. 6 RCA Picture Tube Dist. Prod. 4th Cover Winegard Company 59

Electro-Voice, Inc. 60 RCA Sales Corporation 22 Xcelite, Inc. 66

IEEEHEAR

DISTINGUISHEDSPEAKERS &PANELISTS

at

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Whenever you write us about your sub-scription, please enclose the address labelfrom your latest copy . . .

. . . or AT LEAST give us your addressexactly as it appears on the label, includ-ing the code number. The code is yourlucky number because it enables us toserve you promptly.

JOHN DOE67 MIDDLE STREETHOMETOWN 3, OHIO132-1 16-X-12XX9-14

ELECTRONIC TECHNICIAN1 East First Street, Duluth 2, Minnesota


Standard Made It...

STANDARD CAN FIX IT BEST

$115° Plus Parts ... S13.50 Maximum Total CostFREE Specially designed shipping cartons to prevent damage in transit

6 MonthsUARANTEE

Only BRAND NEW PARTS Used 48 HourService on All STANDARD Tuners Latest

Testing Techniques Assure Proper Alignment$3.00 Defective Tuner Trade-in Allowance

Against a New STANDARD Replacement TunerCarrying a 12 MONTH GUARANTEE

IN TV IT'S cS3 / / /

STANDARD has maintained uniformmounting centers for :he last 13 years.Over 50% of the TV sets in existence todayhave STANDARD tuners-in the case ofmost other tuners one of the 8 STANDARDreplacement models car be easily adaptedor will fit directly in pkace of these units.All STANDARD replacement tunerscarry a 12 Month Guarantee.

SEE YOUR AUTHORIZEDSTANDARD DISTRIBUTOR

MORE PROFIT FOR THE SERVICE DEALER GREATER CUSTOMER SATISFACTIONGUARANTEED BY THE WORLD'S LARGEST TV TUNER MANUFACTURER

standard koHsman INDUSTRIES INC.FORMERLY STANDARD COIL PRODUCTS CO., INC., MELROSE PARK, ILLINOIS


Complete rescreening means sharp, clear TV pictures from each RCA SilveramaThese RCA Silverama picture tube bulbs are getting a new phos-phor screen-the "face" they will one day show to your customers.

As they inch their way along this vibration -free settling belt inour Marion, Indiana picture -tube plant, a suspension of phosphorparticles settles slowly from a chemical solution in each bulb, de-positing a smooth new screen over the faceplate.

This is one of the final steps in the rescreening process. Prior tore -use each glass envelope has been rigorously inspected. Its ex-terior has been buffed and polished to mirror -smoothness. Then in

Phosphor blending tanks.Here the proper blend ofscreen phosphor particles ismixed with a solutionultra -pure demineralized wa-ter and settling chemicals.Mechanical blenders, provid-ing a uniform suspension.help assure the perfectlyeven screen that character-izes Silverama.

a series of acid baths and water rinses, the interior has beenscoured of its former coatings and delicately etched to restore itto the peak of its optical capability. Only when chemically cleaninside and out is it ready for its new screen.

These exacting techniques-and the precision engineering be-hind them-provide every RCA Silverama picture tube with thebest picture -making capabilities modern technology can produce.They are your assurance that you install the finest when youinstall Silverama.

Final screen quality andfocus check. Here on an au-tomatic test unit, a trainedinspector examines a testpattern on a finished picturetube to determine screenquality and picture focus.This is but one of 26 differ-ent tests each Silveramamust pass at this test unitbefore it is okayed for saleand distribution. Tubes tail-ing a single test are auto-matically rejected.

RCA ELECTRON TUBE DIVISION. HARRISON. N. J.

The Most Trusted Name in Television

ectr echnicia - americanradiohistory.com...electronic technician and circuit di-gests, published...

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