nd Diode Analyzer on the mar· ure on almost every type of liodes to 30 amp. power types. ,tories, engineers and basic in­les the following tests : V

to 100 MA j drop ermometer specifications

Inalyze the parameters of sili· ,ampe res at ]50 V and ]500 V ICdk:J ge . The 2JOT can also cu rrent voltage and for ward

j (>1 210T r-ircuit. All are can· pr im:ny. scale. Forward CharaclE'ristics lhese ltpms only. For e,a mple s c:~n be check ed on OIIC of I llitage. In addil in n, two tcm· is fro lll - 20 deg. to 5" Ikg C.

inc

l'll

S.-ltniIU,\ H"cllfiers

A Versatile Broad Co\,,'r,lge Instrumen t with

Blcctronlc TIlermometer for COlllp l p te l~' Test,

Z~nor mfH \n scn'~, POU;H Pipdl!s ".111·

and r " rtnamuml Signal Vl(l!lt6 nl'l

8tto t/flole12101 ELECTRONIC THERMOMETER

ZENER, AND DIODE ANALVZER

SPECIFICAliONS J05-J30V 50-60 cycle operation Meter accuracy 2% at full sca le J % pre ci sion resistors usee! Special forward drop scale reads effective DC volt age drop On-Off switch has overload circuit breaker Human factor engineered· requires positive action to supply

and hold power Fully isolated from power line 30 am p. binding posts provided Themo metcr provides instant tempcature check Three main power suppli es pro\'ide seven met~red \' ranges

0·1.5 V 0·7.5 \' 0-15 V 0·30 V 0-150 V 0·300 V 0·1500 V

Seven current ra llg~o :J,lIu ll' grou ped functions anti r an~e, 0·100 ~Iu 0-1 ~1. \ U- 1O ~L\ It· IUO ~l,\

0·1 .\ 0-10 i\ 0-30 ,\ Size: 1(1 1 , ~ !l x S' Weigh t. 11 Ibs . . ~ h\Jlpim; Wg\. 14 ibs

8tt~ t11101t1212

ELECTRO $79~~THERMOMETER complete with probe

Checks Temperature of Diodes, Coils, Transformers, Transistors, Wire, Liquids, etc. without Heat Sink Loss

• Two Convcnient Scales: • Calibration accuracy !Jlus or minu s ~'1in us ~O" C to 55"C. ~O-'C to 1600(; 2 Per Cent oler ent ire r3n£c

Herc' s a versal ile. "ccurate ~Iect r o ni cally ( ulli rolll ·d tilPrU1UJIlc tcr tha t can be used for countl ess tcmperature checking appl!callnns Whethe r its used wit h 1i4ui u~ , gas or soli ds Ille ;I'Iodel 212 wil l give yo u an instant temperat ure check. Circull ry oml (rn nt panel k nob inclu des a calib ration adJu "tm ent to assure l'vmjJ lelr acc uracy. The In,-\ r ument can be ,c t for rcgular ti r cun tinuous rl'aLlJlI g. :\[elcr h<!, 3· '" " nw rrorpu sca le , 200 lJA mon ' lllen\. Power 's upply is two 1.5 I'olt C ~d l s, Weight 3 Ibs.

S1:lmlard e tjuipnw nt inr'l ud,' , Ihcrml,lcT probe d ~~ignl'd for surface 11le~"u r~ll1el1\. ProM . \\'ill] :l-fO{'{ w rd, is III,ul"tC'u \0 preven t Iwal transfer and can be fn,t ellt'd to compo ne t unt! ~r \bt or held . , ,EST F ROBES ant .'iJ;t.. bl. for. wid•••rlc IV

ppllc"Honl includinq liquid" S"' ."d IOli&,., IN ". • quotation~

S«4 ~11~ ~e~

POWER SUPPLIES lAB INDUSTRIAL AND GENERAL SERVICE UNITS OFFER

4 voltage ranges instead of one or two 5 meter ranges instead of two or three tight voltage regulation. low output impedance

AND

0-7.5V variable bias Is obtained simultaneouslyTHE SE(O PLUS - with the 0-15V and O-)5V.

POWER SUPPLY COMPARISON CHART

"'.... . 1 -, ~ ROO ..... ~.~ ....."- It:~ t U V .u..­E~rO~I~' ." ..,~\

.BV ~,- ~:;:

....... .uo"'... "' 1oIO»r,,,, ).LU

"""'" ....' ~. NU.Y

:f2~].lD ltIII(W.tI.~ "001 a.... ~~ -" 4tM~.1"VI v.,... ~ --. ~~~, -..

Ott· ...

....·-Ioo'r lb .."" := NO

i~ 1

0 m.... x"", • J)~'

~-. :=. 0..... ' [ "'........­ ,IOUloQl ,....... ~~.

~-tn..I..~ '"-'

!"Olfl£ .......... 6-T l \ '

1!!nt."to W'l'\' .. ....... ""I!IQ:L n?'li.il~..,..

l' MODEL RPS·4 Transistorized Constant Voltage Power Supply

Completely Wired and Tested 105 - 130 Volt AC, 60 Cycle $3695

NET ~.. Includes 24" Set Test Leads

RPS-2, RPS-4

r ansistorized continuously variable and volt­

~u::~yn:J~1;~u~~,r~e~I~:~n:~e·r~d ~~to~t~ provides a metered DC supply for transis­

Innel diode circuits, experiments. relays and oment. It can also be used for charging nickel rechargeable batteries and for biasing tube I is designed for use as a substitute for the l pplications within its specifications.

SPECIFICATlONS • Transistorized circuit maintains

constant voltage over a wide load - variation within 3%. Up to 15 Volts and 150 MA and up to 25 Volts and 50MA (See Chart)

• Five output and meter ranges: top meter scale, 0-1.5V, 0-15V and 0-150MA; bottom meter scale. 0-30V and 0-30MA

• Special bias tap for simultane­ous 0-7.5V and 0-15V output

• Maximum ripple .001 % at full load

• Output impedance - 1.8 ohms resistive. No motor boating

• Overload protection permits feeding into short circuit with­out damage

• Bakelite case - 4',~ "x5'h "x7'/"

• Weight· 2 Ibs.

SPECIFICATIONS • Maximum ripple 10MV RMS

• Regulation Load + - .5%, Line 5%

• Output impedance 1 ohm

• Continuously variable output control 0-28V

• Short circuit protection

• Overload indicator

• No overshoot

• Response time 2 Micro seconds

• Meter accuracy 2% full scale

• Two variable bias voltagesavailable at separate jacks

• Bakelite case - 3'1. "x5~ "x7~"

• Weight - 3 Ibs.

MODEL RPS·5 ~,

:.~~

QU ­

Zener and Transistorized Voltage Regulated DC Power Supply

Completely Wired and Tested 105 - 130 Volt AC, 60 Cycle $69~9Includes 24" Set Test Leads

Regulation Characteri.tic. RPS-S

Designed to industrial standards, the Seco Model RPS-5 is a continuously variable Power Supply that can be set to dial any voltage up to 28 volts DC. Versatile, accurate - zener regulated transistorized circuit maintains CONSTANT VOLTAGE with no overshoot over a wide load variation - better than 1% regulation at full rated output of 150MA.

An exclusive feature of the Model RPS-5 is its current meter­ing circuit. This circuit keeps the meter out of the output circuit where any small added resistance or impedance is highly undesira­ble. All current metering is done ahead of the transistor. The transistor Icbo requirements are extremely rigid and only high quality power transistors can be used in this Unit.

In addition, the RPS-5 is designed to feed into a short circuit for short periods without damage. Both meter shunts and meter are protected by a diode clamp circuit. Unit is also equipped with an overload indicator light which glows dim under normal load and shines bright in case of a short. Indicator·light also serves as a fuse in case of a component failure inSide the Unit itself.