r milr7 00,000,001. - world radio history

Digests;1,

197500,000,001.

milr7.1.1G110

ail

ill101111

1935$80,000,000

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11111111111111',!!!!0,1111

r- 1955

$1,800,000,000

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TV RECEIVER "SPECS"OVER 30 MAKES 588 MODELS

See Page 40

CaldwII-Clements, Inc.

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TECHNICIANL. Circuit Digests

TELEVISION

M. CLEMENTS

O. H. CALDWELL

ALBERT J. FORMAN

SIDNEY C. SILVER

ANN O'ROURKE

Publisher

Editorial ConsultantEditor

Managing EditorAssistant Editor

J. L. STOUTENBURGH Contributing Editor

DR. A. F. MURRAY Contributing Editor

B. F. OSBAHR Contributing Editor

CHARLES F. DREYER Art Director

ELMER KETTERER Circuit -Digest Production

GEORGE PUGLICI Circuit Diagrams

S. TANHAUSER Editorial Secretary

BUSINESS DEPARTMENT

H. A. REED V.P. & General Sales Manager

BERNARD BLOCK District Manager

MARSHALL FAILLACE District Manager

P. J. CARNESE Sales Promotion Manager

N. McALLISTER Asst. Business Manager

MARTHA USDIN Production Manager

A. H. POND Controller

W. W. SWIGERT Credit Manager

ELMER DALTON Circulation Manager

480 Lexington Ave., New York 17, N. Y.Telephone PLaza 9-7880

P. H. DEMPERS District Manager

201 N. Wells St., Chicago 6, III.

Telephone RAndolph 6-9225

CHRIS DUNKLE & ASSOCIATES

California Representative3257 W. 6th Street, Los Angeles 5, Calif.

Telephone DUnkirk 7.6149

3077 Turk St., San Francisco 18, Calif.

Telephone EXbrook 2-0377

TECHNICIAN & CIRCUIT DIGESTS, Oct.1955, Vol. 62, No. 4, $.50 a copy. Published monthly by Caldwell -Clements, Inc.Publishers also of MART including Price -Fax,and TELE-TECH & ELECTRONIC INDUSTRIES.Publication office, Emmett St., Bristol, Conn.Editorial, advertising and executive offices,480 Lexington Avenue, New York 17. Tele-phone PLaza 9-7880. M. Clements, President;M. H. Newton, Assistant to President; JohnJ. Borghi, Vice President and Treasurer;M. B. Clements, Secretary.

Entered as second class matter at the PostOffice at Bristol, Conn., June 10, 1954.Subscription rates: United States and Con -ado, $4.00 for one year; $6.00 for twoyears; $8.00 for three years. Pan-Americanand foreign countries: $7.00 for one year;$10.00 for two years; $14.00 for three

years. Copyright 1955 by Caldwell -Clements, Inc., New York. Title registeredin U. S. Patent Office. Reproduction or

reprinting prohibited except by writtenauthorization of publisher. Printed in U.S.A.by Hildreth Press, Inc., Bristol, Conn.

ELECTRONIC RADIO AUDIO SERVICE

OCTOBER, 1955

FRONT COVER The fabulous growth of TV -electronic servicing during the past 20 years-:rom 580,000,000 to 51,800,000,000 annually-is expected to continue during the next twodecades, reaching a record $8,000,000,000 by 1975. The significance of these statistics is theexpanding field of opportunities which will open to qualified TV -electronic technicians. For apreview of electronic installations which wil' challelge your technical knowhow in years tocome, Sc" -Your Electron :c Future- on page 28.

FEATURES and ARTICLES

Tilt -Out Chassis Speeds Service 16

TV Technician Employment 18

Tricks with Tubes; Opportunities; Talk Too Much? (Editorials) 21

"Tuning in the Picture" 22

Test Equipment Standards for Color TV Robert G. Middleton 24

Color Shorts 25

"Tough Dog" Corner R E. Simpson, I. White 26

Antenna System Problems A Clawson, I. Mancini 27

Your Electronic Future 28

Shop Hints . . . G. Mancini, H. Galduerger, S. Clark, 8. Riis, M. Revzin, R. Oja 29

Tuner Oscillator Tester Clarence C. Fuller 30

Let's Look at Circuits Sidney C. Silver 31

Technician Test Equipment Contest 32

New Audio Products 35

New Antennas 36

Latest Test Instruments 38

TV Receiver "Specs- 40

You and the Law Floyd Wilkins, Jr. 46

Rx for Ailing Hi-Fi Gear James Grafton 50

New Components 60

DEPARTMENTS

Letters to the Editors 8 News of the Industry 52

Editor's Memo 14 Reps & Distributors 54

Calendar of Coming Events 23 Association News 55

New Products 34 Catalogs & Bulletins 62

New Books 62

CIRCUIT DIGESTS 65

ALIGNMENT nV.4 I 1,. .3 two/ 33.5131 3.3

1. L'..nratI op porn , 1133n3 nor14,3. 4511, 3 valls o.,4. Comm. deteclor 31,35 Ad.pal inumt Oro..s. 3/ow. *Um srl 7 Como. wed.*

.314. N`3. Agri rms... 3114, it... 7,raccompll. 11 tPARTS LIST egiNE

.01

101011

IN THIS ISSUE:CROSLEY: Radio Chassis R100, 101DUMONT: TV Chassis RA -350, 351MOTOROLA: Radio Chassis HS454RCA: TV Chassis KCS96, A,B,C,D,ESENTINEL: TV Chassis SM-1010ZENITH: Radio Chassis 7X03

TRANSFORMERS

PICTURE TUBES

TECHNICIAN October, 1955

There:5) no businesslike

New BusinessThere's nothing quite so healthy for anybusiness as new business, new customers,new sales.

In electronics, your opportunities for newbusiness are greatly increased when youput the names, Delco and General Motors towork for you. Here are names that are known-names that are respected for quality parts,dependable service, business integrity andcustomer assistance.

But your bid for new business doesn't stophere, for Delco offers you a very uniqueopportunity. Delco is the sole source fororiginal equipment parts used on more than

A GENERAL MOTORS PRODUCT )GENERAIMOTOR

13 million car radios! This vast readymademarket for special applic2tion parts canmean new replacement business for you. I naddition, Delco is an important and reliablesource for the most used universal replace-ment parts for electronic equipment.

There's still more-Delco also issues currentbulletins and maintains field schools to keepyou posted on the latest developments in theelectronics industry. So see your Delco Elec-tronic Parts Distributor soon, he'll explainthe many ways that Delco and GeneralMotors can help you gel your share ofnew business.

OTORS

.

-' A UNITED MOTORS LINE

TECHNICIAN October, 1955 3

4

featuring CDR automatic ROTORSHere they are .... the fastest selling line of rotors ...

complete in every detail ... including three modelsin completely AUTOMATIC rotors! The AR -1 and AR -2

and the AR -22 which is the automatic version ofthe famous TR-2. ALL FIELD TESTED AND PROVEN

BY THOUSANDS OF SATISFIED USERS!

TR-2 The heavy duty rotor withplastic cabinet featuring "com-pass control' illuminated perfectpattern dial... uses 8 wire cable.TR-12 Complete rotor INCLUD-ING thrust bearing. Handsomemodern cabinet with meter con-trol dial, uses 4 wire cable.

TR-4 The heavy duty rotor com-plete with handsome new, moderncabinet with METER control dial,uses 4 wire cable.

TR-11 Same as model TR-12 with-out thrust bearing.

PRE -SOLD to millions with

the greatest concentrationof TV Spots in our history.

CORNELL-DUBILIERSOUTH PLAINFIELD, N.J.

40% sharper tuning

than any other

automatic rotor

11

THE RADIART CORP.CLEVELAND 13, OHIO


There's long lifein every Malloryselenium rectifier

A NEW LINE of Mallory selenium rectifiers nowgives you stacks that you can depend on everytime on replacement jobs. Our engineers have'developed designs and manufacturing methodsunique in the rectifier business, which produce per-formance and uniformity never before possible.

Service life of the new rectifiers is exceptionallylong. Due to their unusually low forward voltagedrop, their efficiency is high-and holds its valuewithout "aging away" in service. And most impor-

tant-you get these extra performance character-istics on every stack.

Every time you use a Mallory selenium rectifier ona replacement job, you. can be sure that you areequalling or exceeding original equipment specifica-tions. You're sure, too. that the job will be freefrom costly call-backs.Your local Mallory distributor carries a completeselection of the new rectifiers in conservativelyfigured ratings to fit popular TV and radio sets.Order your stock from him today.

Another service engineered product by...

MALLORYCAPACITORS CONTROLS VIBRATORS SWITCHES RESISTORS

RECTIFIERS POWER SUPPLIES FILTERS MERCURY BATTERIES

APPROVED PRECISION PRODUCTSP. R. MALLORY & CO. Inc., INDIANAPOLIS INDIANA

1ECHNICIAN October, 1955

Because you're going tobe servicing, selling, and talkingColor TV more than ever in

the months ahead, you'll be gladto know Motorola Color TV, theset that's easiest to service, is alsothe easiest to sell!

Easiest to service because it's easiest to getat. Like all Motorola products, MotorolaColor TV has simple, straightforward de-sign with less chance for service problemsand more room for service work. (All partsare immediately accessible for testing oron -the -spot servicing.)

Easiest to sell because it's the most service -proved and the most reasonably priced.Motorola introduced the first Big ScreenColor TV set over a year ago. Since then,Motorola has sold and satisfied more BigScreen Color TV customers than any othermanufacturer. There are now three beau-tiful models to choose from with prices aslow as $695.

19CT1 This distinctive consolette inbeautiful Mahogany contains the finestColor TV chassis ever developed. Itprovides the finest color and black andwhite reception, yet costs just $695.

MWorld's Largest Exclusive Electronics Manufacturer

Prices and specifications subject to change without notice.

6TECHNICIAN October, 1955

She: But, how do I know this is a good tube?

You: Because, this is a CBS aluminized Mirror -Backpicture tube. There aren't any better.

She: And I see it has the Good HousekeepingGuaranty Seal, too. That's proof enough for me.

Customer confidence really counts when it comes to the

big tube. That's when CBS tube advertising helps you most.

For CBS tubes have the Good Housekeeping Guaranty Seal

and are nationally advertised to 76.9% of your customers

... the women of America. And 53% of these women

are influenced in their purchases by that seal of approval.

You protect yourself and gain your

customer's good will when you install a new

CBS aluminized Mirror -Back picture tube.

Show her the CBS carton with theGood Housekeeping Guaranty Seal.

,.0*" Ne"'"4:4 Guaranteed byGood Housekeeping

...m,50 T.'46

CBS- HVTRON, Danvers, Massachusetts . . . A DIVISION OF COLUMBIA BROADCASTING SYSTEM, INC.


64% of the top EngineersPREFER AND USE

DYNAMIC MUTUAL CONDUCTANCE

TUBE TESTERS40 at 4P

-

MODEL600AWorld's most popularTube Tester

U ... that 600A is certainlyunbeatable! I have sold 4for you by just letting servicecenters use mine for part ofone clay. 77

Harold F. Tolles, St. Johns, Mich.

tt I purchased a 600A last Fall andhave found it to be one of thebest investments in test equipmentthat I have ever mode. 71

R. Lytwyn, Nytyl Electronics

All tube testers manufactured today fall intofour major classifications.If you use vacuum tubes in your profession,and if you ever intend to purchase a tube testerplease write today for the 28 page book ofTube Tester Facts and learn the advantages ofeach classification in order that you will be ableto more efficiently select for your requirements.This detailed, illustrated and descriptive bookalso contains circuit diagrams and formulas.

rTHE HICKOK ELECTRICAL INSTRUMENT CO.10523 DUPONT AVE. CLEVELAND 8, OHIOGentlemen:Kindly send me free of charge your new 28 page book ofTube Tester Facts.

NAME

COMPANY

STREET

CITY _ ZONE STATE

el

LETTERSTo the Editors

Too Much Talk(The followlity letter was sent to How-ard J. Wolfson, Chairman, AssociatedRadio & Television Servicemen, Chi-cago, in support of ARTS' resolutionopposing distributor wholesale sales tothe public. A copy was sent to TECH-NICIAN.)

DEAR SIR:

Your resolution reflects my personalviews and gripes of many years' stand-ing. I am strongly, even violentlyopposed to selling radio -electronic re-placements to the public at trade dis-counts. While manufacturers and dis-tributors are guilty of this breach, I'mafraid the servicemen are also con-tributing to the evil by failing to insiston proper identification procedure atthe distributor store.

For another thing, the servicemantalks too much. He often tells the setowner just what is wrong with the in-operative set, following a time-consum-ing diagnosis. What's to prevent thebuck -conscious set owner from drop-ping in at any distributor and pickingup the needed replacements?

I don't believe the general publicpurchases a capacitor or resistor ortransformer or other replacement re-quiring time, tools and "know-how" toinstall, unless the serviceman hastalked too much. But when it comes toaccessory -like products, such as tubes,then I believe the public buys at whole-sale.

I am in full sympathy with the ac-tivities of many service organizationsin outlawing distributors who fail toprotect the service trade.

CHARLES GOLENPAULVICE PRESIDENT

Aerovox Corp.New Bedford, Mass.

Color TVEDITORS, TECHNICIAN:

Please send me information on whereto get a color television set wholesalefor display and color service advertis-ing.

JOHN W. ELSDINCurtis Radio -Television ServiceRevere, Mass.

Arrangements for technicians to ob-tain color sets have been worked outthrough Motorola and RCA. ReaderElsdin, and the many other forwardlooking techs who have written us ask-ing the same question, should contactthe local distributors of these two com-panies. If you do not know who thesedistributors are, find out by writing toMr. E. R. Taylor, Vice President, Mot-orola, Inc., 4545 Augusta Blvd., Chicago

(Continued on page 10)


*oe

r/i Extra Saks... Extra nofits with \AUTOMATIC

PH I LCO ANTENNA ROTOR

Super Pin -Point ReceptionThere's salts magic in the Philco name .. . especially when it appears on this top quality, customes-

satisfying Automatic Antenna Rotor. Precision -designed for accuracy, ruggedly built for long,

trouble -free life . . . the Philco AP -2 Rotor outmodes all other antenna rotating devices.

The Philco AP -2 permits pin -point adjustment with sharp separation ... tan the knob to thedesired posit:cr. and antenna revolves to the exact location chosen .. . automatically. It locks

firmly and w..11 not drift or stray. Accuracy is not affected by changes in line voltage.

IT SELLS ITSELF!Thousands of satisfied purchasers everywherehave found the Philco AP -2 a perfect answer forbetter pictLres, and Service Dealers have found thePhilco AP2 Automatic Antenna Rotor the per-fect answer for new sales volume... greater profts.

Order your stock of the AP -2 horn your PhilcoDistributor now.Don't forget-every AP -2 you sdl means marePhilco Share and Profit stamps-Free-More ne wmercnandise to sell at a dear '..03% profit. Askyour distributor about the 1955 Share and Profitprogram at once. There s money in it for you.

PH I LCO CORPORATION Accessory Division

PH I LCO TUBES IMPIOVI TNI

PIIII3INANCI OPANT TV OR

RADIO ISCIIVII '

Philadelphia 34, Pa.

1111101110111111101k

Big bargainfor two bits!

1-7afidy,draldergteeigtod

eabit7etcompiehk

labels.generous

fete wit

supplyof blan

$ 2.50 valueyours for

/c:4tplus 40 identificationlabels from envelopes containingCentralab Ceramic CapacitorsGives you a place to keep loose capacitorsafter you've opened an envelopeTo get this handy cabinet, you buy capacitors just asyou usually do to meet your needs - making sure to getCentralab Ceramic Capacitors.

Every envelope of five Centralab Ceramic Capacitorscontains a small folder. At each end of this folder, there's agreen identification label. One of these labels has thissame identification printed on its reverse side, only in black.This is the label you tear off and save.

After you have 40 of these identification labels,send them with a quarter (for postage and handling) -and your name and address (printed clearly) - toCentralab, A Division of Globe -Union Inc.,902.1 E. Keefe Avenue, Milwaukee 1, Wisconsin.

Save40labels

like thisgreen on one side,black on the other

cenualclob

;" Tear tis °II{ asa ! minder..005

.f. V.

SP/ I*. diant

0-1455

A DIVISION OF GLOBE -UNION INC.

Letters to the Editors

(Continued from page 8)51, Ill.; and Mr. R. W. Saxon, GeneralSales Manager, TV Div., RCA VictorDiv., Camden, N.J.-Ed.

EDITORS, TECHNICIAN:I don't see how one of your corre-

spondents (August "Letters to the Edi-tor") could manage to spend $4000 oncolor, unless he bought station typeequipment. We bought an RCA CT100,a Jackson 712 color bar dot generator,rebuilt an old scope to make it wide-band, and made up a complete set ofextension cords. We feel that we arefully equipped to study color TV serv-icing with less than $1000 invested. In-cidentally, in rebuilding an old scopeto make it wideband, I learned moreabout scopes and wideband amplifiersthan I ever would have otherwise.

HOWARD RARERabe Electric ShopFremont, Nebraska

Color TVEDITORS, TECHNICIAN:

I read your article (Get Started inColor TV Now). I agree that we needa set to be able to get anything out ofreading literature on Color TV. Nobodyhas a color set in my area but I wouldlike to have one in the service shop.

JOHN KOLANDERRADIO TV SERVICE

Juda, Wisconsin

EDITORS, TECHNICIAN:We shall be very happy to cooperate

with any segment of the trade thatwill help further the color sales.

IRVING SARNOFFEXECUTIVE VICE-PRES.BRUNO-NEW YORK

New York, N.Y.

EDITORS, TECHNICIAN:Our Director of Sales feels something

could be worked out through our dis-tributors. I have therefore turned overto him the whole story as it developedthrough your efforts with my recom-mendation that we follow through onit. I hope this results in widespreadknowledge about color.

HAROLD J. SCHULMANCBS -COLUMBIA

Long Island City, N.Y.

That Girl AgainEDITORS, TECHNICIAN:

After reading about the "technician'sdumb girl friend," I was wonderingwhether she thought a "hot coil" was a"torrid toroid"?

BERNARD ALEXANDERHillside, New Jersey

That's a choke to some, but not toothers. Either you reactor you don't.-Ed.


New concept in telescoping TV masting

... utilizes 1 & l Perma-Tube

REDUCE YOUR TV

MAST COST OVER 20%Use high -strength, corrosion -proof 1& l Perma-Tube 10 -foot

telescoping sections to easily construct 30 to 50 -foot masts

Only J&L Telescoping Perma-Tube offers: Joint design which provides instant field as-

sembly Machine -fitted joints that insure close toler-

ance for high strength and rigidity Guy wire ring position that eliminates all

binding and guy wire interference

No longer is it necessary to buy expensive, ready-made masts. Now youcan "tailor-make" your own with standard 10 -foot lengths of 16 -gageJ&L Perma-Tube-and save money.

It's available in cartons from your local distributor in five diameters.The largest base section OD is 214 inches and each telescoping section is1/4-inc_i smaller, the smallest section having an OD of 114 inches.

J&L Perma-Tube in the 11/4 -inch size can be used interchangeably as afitted -joint section for smaller masts or as the smallest and topmost piece

of longer telescoping masts.Corrosion -proof J&L Perma-Tube is treated with Vinsynite-then coated

both _nside and outside with a metallic vinyl resin base. It successfullypasses ASTM's 500 -hour -minimum salt spray test-which guaranteesPerma-Tube's longer life on the job.

Sturdy J&L Perma-Tube is made of a special,high -strength, J&L- produced steel. A 10 -footsection of 11/4 -inch diameter by 16 gage can sup-port a weight at its center point of 200 poundswith a minimum of deflection and permanent set.

Order these new telescoping sections alongwith your regular 11/4 -inch J&L Perma-Tube.Hardware-cotter keys or bolts, clamps and guyrings-may also be secured from your local dis-tributor. For more information write J&L direct.

STEEL Jetted dit lauflello&STEEL CORPORATION - Pittsburgh

TECHNICIAN Octolmr, 1953 11

What's INSIDEmakes the difference

in MALLORY FP Capacitors

To see what makes Mallory FP electrolyticssuperior in performance, take a look atwhat's inside the can. You'll find-

GENUINE FABRICATED PLATE ANODE ..originated by Mallory, and available forreplacement work only in the Mallory FP... gives excellent heat dissipation, lowimpedance, low inter -section coupling.

ETCHED CATHODE ... prevents capacitanceloss, reduces RF impedance.

85° C. CONSTRUCTION ... standard in FP'sfor years, at no extra cost . . . eliminates needfor voltage de -rating, even for 450 -volt units.

LEAKPROOF SEAL ... prevents loss of elec-trolyte ... withstands high temperatures ...and still retains the venting feature.

There are other features, too ... and manyyou can't see, such as the hospital -like sani-tation maintained in the Mallory plant toguard against impurities which could shortencapacitor life. Add all these up, and you'llappreciate why FP capacitors are the stan-dard of performance for replacement and foruse in original equipment.

Order your stock of FP capacitors today,from your nearby Mallory distributor. Theylead the field, yet cost no more.

Another Service -Engineered Product by...

CAPACITORS CONTROLS VIBRATORS SWITCHES RESISTORSRECTIFIERS POWER SUPPLIES FILTERS MERCURY BATTERIES

APPROVED PRECISION PRODUCTS

make theZEE -BEAM

test!SUPER ZEE -BEAM ALL -CHANNEL VHF YAGI

Model 440

For extreme fringe areas. Features two pairs of dualreflectors and exclusive ZEE -X Electronic Elements.

List $32.95

See 2114 WE LCO gakys..

Best Performance of Any ComparableAntenna or Your Money Back!

ZEE -BEAM ALL -CHANNEL VHFYAGI Model 220

For far fringe areas. Alsofeatures ZEE -X Element, ex-clusive with Welco.

List $24.95

ZEE -REAM ALL -CHANNEL VHFYAGI Model 110

For fringe areas. IncludesZEE -X Element; a remarkableantenna for the price.

List $18.75

CONICAL ZEE -BEAM ALL -CHANNEL VHF Model SO

For primary signal areas. ZEE -XElement. Single bay style(2 -bay style available also).

List $8.95

Low Band Pattern

______ High Band Patterr

zEE-x oect r"icElements

.. a basic Welco devel-opment that makespossible many new out-standing antenna designs.The first element tofunction with true half -wave dipole character-istics and full efficiencyon both VHF bands.Patent pending.

Send This Coupon in Today!Prove to your own satisfaction. . . see why we say the ZEE -BEAM Antenna gives you thebest performance of any in itsprice range now on themarket! Order your ZEE -BEAM Antenna now; shippedfreight prepaid.RE THE LEADING ANTENNA INSTALLER

IN YOUR AREA!

WELCO MFG. CO.Burlington, Iowa

WELCO MFG. CO., 225 South 3rd Street, Burlington, IowaPlease rush freight prepaid my ZEE -BEAM Antenna order for test. I understand this is a 30 -day

money -back guarantee offer.Dealer Net Dealer Net

[] Model 440 $19.77 [1 Model 50 $5.37

L 1 Model 220 14.97 1 1 Model S-2 Stacking Kit .96

Li Model 110 11.25 I'Technical Material NC

Li CHECK ENCLOSED FOR $ H MONEY ORDER ENCLOSED FOR $

Name of Jobber

His Address

NOTE: You must enclose your jobber's name and address in order to take advantage of thisspecial offer, so he will receive credit for your order.

Name of Authorized Dealer

Address

City _Zone State -J

TECHNICIAN Octobror, 195513

for servicing

YOU NEE 3SOMETHING EXTRA

For instruments actually ahead of today's... ready for the day when color TV becomes as general as today's

black -and -white sets ... look at the Hycon line, designed withthe electronic serviceman in mind. Accurate enough for critical work in the

shop, you'll also find these test instruments rugged, compact,lightweight ... just what you need for those money -making :louse calls.

MODEL 616 COLOR-BAR/DOTGENERATOR

. for adjusting and testing color receiv-arsand transmitting equipment by manufactuter,

station or serviceman. Features: Setenoutput forms of bars, dots, cross -hatch,

phase and color -difference signals,including NTSC color bars.

PANEL PRESENTATION SHOWSACTUAL COLOR AND SEQUENCE OF

GENERATOR OUTPUT.$41500

MODEL 614 VTVMConvenience at unprecedented low costsums up this rugged, serviceableinstrument. Hycon plus features ir.clude:

-

21 ranges (28 with peak -to -peak scales)large 61/2- meter; 3% accuracy on DCand ohms, 5% on AC; AC frequencyresponse to 250 mc (auxiliary probs extAND TEST PROBES STOWINSIDE CASE, READYTO USE. S8750

MODEL 617 3" OSCILLOSCOPEDesigned both for color TV servicing ar.d

laboratory requirements. Features highdeflection sensitivity. (.01 v 'in rms ;4.5 mc vertical bandpass, flat within

1 db; internal 5% calibrating voltag a.Small, lightweight ... but accurate

enough for the most exacting work.SPECIAL FLAT FACE 3'" CR T

PROVIDES UNDISTORTED TRACEEDGE TO EDGE. $26

I 5

See these latest Hyconmoney-makers - all in

matching, bench -stackingcases - at your local

electronic parts jobber.

Iii Mfg. Company2961 East Colorado StreePasadena 8, California

Where accuracy coa)rts-ORDNANCE ELECTRONIC "EST IN5TRUMENT3

ELECTRONIC SYSTEMS AERIAL ,URVEYSBASIC ELE:TRONIC RESEARCH AERIAL CAMERAS

GC NOGO MISSILE "EST SYSTEMS

Editor's MemoMost of us have come to recognize

that you can't get everyone to like you.After all, there are so many differenttypes of people with different ideas. Itwould be a dull and static world ifeveryone thought exactly the same,liking everybody and everything to thesame degree.

Perhaps the real key is who likes you.This was pointed up in a recent incidentI'll tell you about later.

Editors seem to be irresistibly at-tracted to statistics and surveys . . .

and for good reason. By nailing downa phase of the industry to specific,scientifically analyzed statistics, we cangive our readers an accurate reportof the state of the servicing industry.

Typical of the problems we'vetackled are: What problems preventyou from making an adequate profit?(see August 1955 issue, page 28) ; Atwhat amount on a TV job estimate isthe customer reluctant to have the jobdone? (see April 1955 issue, page 13).To find the answer, we query hundredsor thousands of technicians to obtainan adequate cross-section.

Now to get back to the recent incidentI mentioned. One of the girls on thestaff decided to conduct a subminiaturesurvey of her own. Two people, to beexact. Naturally, the result of her sur-vey will have little scientific value be-cause the cross-section was way toosmall. But she did turn up a situation

about likingthings.

This gal had a little intercom unitthat went on the blink. The circuit(what little there was of it) was simpleas could be. So she brought the unitto a local tech for repair. While in theshop, she asked him if he was familiarwith TECHNICIAN, and what hethought of it. Sure he was familiar withthe magazine, it had the prettiest coversand all that, but he didn't like it onebit. Why? Well, the pages were filledwith circuits and technical informationthat he couldn't understand. Like Isaid, you can't get everyone to like you.P.S. He couldn't fix the intercom.

So our gal took the little squawk boxto another shop. Yep, you guessed it.The tech there thinks TECHNICIANis tops, reads it studiously, and under-stands what he's reading. Oh sure, hefixed the intercom in a jiffy. And theeditors breathed a sigh of relief.

Is the second fellow a good tech be-cause he keeps up with the latest de-velopments, or vice versa? That's some-thing like asking whether the chickenor egg came first (it was probably theegg, through a mutation). Chances arethat both factors are mutually depend-ent. The tech who's on the ball wantsto be well informed, and because he isinformed he steps out ahead of thecrowd.

14


I

RCA

SELENIU

-one comprehensive line for virtually all replacement requirements:

RADIO CORPORAT/ON of AMERICAELECTRONIC COMPONENTS HARRISON, N. J.

Now, RCA offers you a top -grade line of selenium recti-fiers for general replacementuse in TV, radio receivers,and phonographs. Advanceddesign, select raw materials,and superior workmanshipgive you a dependable line ofselenium rectifiers for virtu-ally all service jobs.

Advanced Design forDependable Performanceand Long Life

Note thewide-openplatespacing foreliminationof solidcenter "hotspot." De-sign utilizescorrugatedspacers for excellent heat dissi-pation and rigid construction forrugged service.

NEW-smaller size ... for any givencurrent, they are smaller thanother types.NEW-quicker installation . . .

integral mounting stud.

NEW-wide-open design ... insuresmaximum heat dissipation, cooleroperation ... no center "hot spots."

NEW-rigid construction . . . for,rugged service.

RCA SELENIUM RECTIFIERS-a com-prehensive line-for consistentlygood performance, easier installa-tion, longer life and customer satis-faction. ORDER FROM YOURRCA DISTRIBUTOR TODAY!

WIDE SELECTION OF 12 TYPES

Max. Max. RCA

Output ma Input volts Type

6575

100150200250300350400500400*500*

*Special tavailablethe use of

130130130130130130130130130130130130

hin types forspace willtype 20301

205012000120601201012070120801202012090120301204012100121101

use wherenot permitor 20401.

TECHNICIAN Octcbor, 195513

NOW.. the Service Dealer can make

111-F1 PROFITSONLY

TRANsvisioNOFFERS THIS

4 -POINT PROGRAM

to theSERVICEDEALER

You sell the F nest MatchedHi-Fi Componer! such as these:

RC 101

RECORD CHANGER (famous English

Collaro) with DIAMOND NEEDLEand RELUCTANCE 'ICKUP.

AMPLIFIER: Superb Transvision10 watt unit with built-in Pre -Amp.

15" Transvision DUAL SPEAKERSYSTEM with cross over network.

The Service Dealer sells the abovecomplete system fel only $159!

*SALES KIT for $4.95 gets youstarted. Rush couper for full details.

1. FULL PRICE PROTECTION.

2. NEGLIGIBLE INVENTORY

INVESTMENT. Vyontairt.ed,

3. FINEST MATCHED HI -FlUNITSfor custom- building or complete

in beautiful furniture cabinets

4. PRICES THAT ENABLE YOU1 TO UNDERSELL COMPETITION.

1ilAs

Featured in

and dully on"Feather Your Neat"

NBC-TVCoast-to-Coas-

BEAUTIFLL FURNITURE plus SUPERB HI -Fl.

You con offer Hi-Fi quality equal to many$1000 job; on the market - for as little as$159 to $299. In component form for custom -

building, or in complete "package" includingfine furniture as shown above. (Bass reflex cor-ner cabinet and lovely chairside end table.)

SOLD ONLY THRU

SELECTED DISTRIBUTORSWrite for name of the one in your area.

DISTRIBUTORS: Some areas still available.Write, vs ire, phone for complete program.

TRANSVISION, INC. NEW ROCHELLE, N. Y.

TM -10TRANSVISION, INC., NEW ROCHELLE, N.Y.

Please st-nd name of your nearest Distributor.

Rush full details on your HiFi Dealer Program.

Name

I Address

a City State

Tilt -Out Chassis

Speeds Service A new wrinkle in chassis lay-

out and positioning, in the face ofrecent innovations that complicatethe life of the service technician,shows promise of making his lot alittle easier. The design principle,which will be featured in the entire1956 line of CBS TV receivers, issaid to provide quick and easy ac-cess to all parts of the chassis withpractically no disassembly problem.

Starting point for the innovationis a vertical chassis that has beenturned around. In other words,when the technician removes theback cover of the set, the first thinghe sees is the underside of the verti-cal chassis, including all subchassiswiring and tube sockets. Hinged atthe bottom, the chassis may beswung out and down to an angle of45 degrees, providing complete ac-cess to the chassis topside. Swungfree in this manner, without removalfrom the cabinet, all tubes and top -of -set adjustment points, as well asthe underside, are accessible withoutobstruction, as shown.

Convenience for servicing provided by newtilt -out chassis, demonstrated by CBS -ColumbiaDirector of Product Services, Daniel Newman.

In handling a tube problem, forexample, CBS -Columbia Director ofProduct Services Daniel Newmanpoints out that there could be theusual use of the continuity tester tolocate open filaments on the under-side as soon as the back has beenremoved. Swinging out the chassisthen facilitates quick replacement ofthe tube. The chassis is then swungback to normal vertical position andlocked in place-particularly con-venient for service in the home.

Extensive field testing has pre-ceded introduction of the tilt -outchassis. As an example of its con-venience to the service industry,Newman points out, a tube replace-ment job is estimated to take 60 percent less time.


or heard of theExponential Antenna?You have not, for untilnow it was unknown tothe engineering world.

WHAT IS ?EXPO, the exponential antenna, represents an

historical technical advance that eliminates the

crippling frequency limitations of all known antennas

by the use of exponentially curved elements.

The ultimate in antenna design! One antenra for

all 83 channels with gains progressively increasing

with increase of frequency. This principle recently

discovered' is the basic answer to the limited band-width problem. There is no need for multiple antenna

installations or other expedients to gain slightly wider

bandwidth operation.

Higher gains- one antenna- one transmission- one installation.That is EXPO.

e .051 to 'it s la eve *lete

1,2,1 't 0.1.4,

Ist tee ecc, ,011"

oog:e tte. eta \ctl a

tonseLs.°-

t'ea ectc\l' aaaIttat e.fs,eVis

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na t b3 6...

anatIo Ites two Ire,e 030

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cce sst okE e5sa do c01.'1,

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neW

ons °operatbt

MODEL X02-2 BAYS

Wrath ,1\ a ttolline cs

Servicemen will appreciate the easeand speed of installing EXPO:occupies less space - pleasing appearance -supreme performance. Its performance sells it for you.

Will you be among the first to see it perform? Consult

-s'oe ttthee0:3.e

o\>dar

datar'the Ise

2 a 5tao vz) t°re\sel

eat

omen,a060-1.S

030 Irexe 41.0ae

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eclecto e re e,c0,ectev

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toae\s ,s1t1c:ec'caa-

sea

acee.5 d'`akrlda

OILyour distributor, or for further information, write: HOLLOWAY ELECTRONICS CORP.

Fort Lauderdale, Florida* Patent applied for.

1-aae 1-

e

tose3bals so

t'oeae1°

TECHNI:IAN October, 1955

Ifsas Epsyasihis

LINE SPLITTER

MTO-11

MT0-59

TO INSTALL AMASTER TV SYSTEM

WITH

UNITS

0 Connect the antenna line to the INPUT

of your Masterline MLA Line Amplifier.The signal is now amplified 37db (70times).

OConnect a line splitter or line couplerto the OUTPUT of the MLA. You now have

2 or more branch lines for feeding toTV receivers.

0Where the branch line is run out-of-doors, connect a Masterline MT0-11(outdoor tap -off) wherever a TV set feedline is required.

OWhere the branch line serves as ariser inside a building, connect a Master -line MTO-59 (wall -plate -tap -off)wherever an antenna outlet is required.

This is only one example of a Master TVSystem, to show the flexibility of Blonder -

Tongue distribution equipment. Thereore many more, all covered in the newB -T INSTALLATION MANUAL.

Write for your Free copy to Dept. FK-18

BLONDER -TONGUE LABORATORIES, INC.WESTFIELD, NEW JERSEY

Manufacturers of TV Cameras, TV Amplifiers, Boasters, Converters, Accessoriesand Originators of the Masterline and 'Add -4 -Unit' Master TV Systems.

51.11151

W 53 $1.it, moot,

irmItms

I-.-.bray.

;;;11"IP

TO=owallulen.

EN- TV TECHNICIAN": EMPLOYMENT

OUSOWareSYd.106 Tlinft

TELEVISIONTECHNICIANS

IliNOTC11 15C&IPANY branch"IWestchester. 13,. Monit.ocOLong 14554 Ann Brontly.

navevir,latfor.nblotli,11.,1:555

Oenelentrelts. ".k.aloOM 551.:4 I.., 4.,15.: TO tor 4,5,5,Math: MY,tr ms

ra:

L77:11

TV Stkv..

EXPO ON 11051.5 CALLS;if WdlWiloo. npol 0.5151.1 55,necosare.y.1 (kr sties'enru a. Ilia,w

I.rad. ex105,5, ear. 4551.5..,1%;*5 Jzs & 1511. O. IIIMM, 5514

The state of the employment mar-ket for TV technicians has improvedwith the fall business upswing. Payscales range from $50 to $125 perweek for full time outside andbenchmen.

For techs with little experience,jobs are being offered at $50-$55.Most of the positions open for ex-perienced men are in the $75-$85category. Those jobs over the $100mark generally demand any or allof the three following requirements:

1. Crackerjack trouble shooter.2. Have own car and equipment.3. Profit-sharing commission for

large jobs or "selling" extra service.Evening and weekend work for

qualified techs with their own carand equipment pays in the vicinityof $3/hour.

A spot check of help wanted col-umns in leading Sunday newspapersaround the country has been madeby TECHNICIAN editors. The fol-lowing advertised openings for TVservice techs were found:

CHICAGO: 11 openings. No list-ings of pay scales. Strong demandfor highly experienced men.

MIAMI: 1 opening. $75. Repairand delivery.

MINNEAPOLIS: No openings.NEW YORK: 18 openings. $50 to

$125. Strong demand for techs withcars: fully experienced.

ST. LOUIS: 5 openings. To $100.Preference for good experience.

GC TUBE CHECKERA handy little series filament tube

checker is claimed to be an easy, fastway to find bad tubes. The "G -C Tube -Check" quickly identifies burned outtubes by plugging them into the propersocket of the tester; there's no waitingfor the tubes to warm up. The testerplugs into TV -interlock or cheatercord. Designated Catalog No. 9270 itnets to the dealer for $3.25. GeneralCement Mfg. Co.,- 919 Taylor Ave.,Rockford, Ill.-TECHNICIAN (Ask forNo. 10-59)

18TECHNICIAN Octobigr, 1955

MODEL U-98 - f32 distinct improveand consequent plcly, positively, inst.::

set it and forget it

7

1

;j45_ biggest longestTVSPOT

CAMPAIGN

New

LIANcE GIVES YOU...

30000,000

TV VIEWERS14;e4 after week

automatic - incorporatesnts-eliminates all arcing

e distortion-points direct -y to target station--iust

List Price, $39.95

MODEL T-12 - fineRocker switch on toption indicator dial. CoHighly accurate!..

New

ip electrical operation.trols turning. Has direc-act and smartly styled.List Price, $29.95

When you sell Alliance Tenna-Rotor, you sell the pace -setter-the favorite for seven solid years!

30,000,000 folks see Alliance TV spots week after week ...newspapers and magazines run hard-hitting Alliance ads allover the country ...that's promotion - sends sales your way!

Alliance is sold the most, becaise it': seen the most. Youprofit most, coast -'o -coast, with Alliance.

Don't be misled! Sell the acknowledged best-seller,best -money-maker . . . Alliance Tenna -Rotor!

IMPORTANT! COLOR is coming! Alliance Tenna-Rotor is theNo. 1 TV accessory needed for sensitive color reception.

Nearly 2.000,000 Alliance Tenna-Rotors are in use.

THE ALLIANCE MANUFACTURING CO., INC.Alliance, Ohio

y.

X:


WHAT

have yo

that other

got

TV-Radiohaven't got?

When you are a Raytheon Bonded Electronic Technician, the answer is simple.

You have the exclusive tool, the only tool in the industry that creates customer

confidence - draws customers to your shop.

Under the Raytheon Bonding plan, your work and parts guarantee is backed

by a Bond issued through one cf America's largest insurance companies.

Customers appreciate the value of this extra protection and, all else

being equal, give their business to the Raytheon Bonded Dealer.

If you can qualify for the Raytheon Bond, it won't cost you a penny. 0

Call your Sponsoring Raytheon Tube Distributor today for the whole story.+0

RAYTHEON

.,#,EY'R ,,,

4 1.4 D S"

RAYTHEON MANUFACTURING COMPANYReceiving and Cathode Ray Tube Operations0 Newton, Mass., Chicago, Ill., Atlanta, Ga., Los Angeles, Calif.excelkittee itt 64citostiol RAYTHEON MAKES ALL THESE:

RECEIVING AND PICTURE TUBES RELIABLE SUBMINIATURE AND MINIATURE TUBES SEMICONDUCTOR DIODES, POWER RECTIFIERS AND TRANSISTORS NUCLEONIC TUBES MICROWAVE TUBES

20 TECHNICIAN October, 195$

TV -ELECTRONIC

TECHNICIAN& Circuit Digests

CALDWELL-CLEMENTS, INC., 480 LEXINGTON AVENUE, NEW YORK 17, N. Y.

Tricks with Tubes Lesson TwoA very hot summer has passed, and we might venture

the guess that it was made doubly hot for receivingtube reprocessors by the report on this racket in ourJuly issue. Through the publication of this report, and subsequent distribution of many thousands of reprints,almost everybody in the industry learned Lesson Num-ber One: Think twice before you buy odd -brand andbargain tubes.

Here's Lesson Number Two: Even when you buystandard brand tubes, your safest bet is to accept themonly if they are in the manufacturer's original individu-ally -boxed carton.

Want proof? Take a look at the three tubes picturedin this month's "Tuning In the Picture" section. Theylook good. They bear the name of a leading tube maker.They were even made by that manufacturer-but nottwo years ago, as indicated by the base date -code. They

were made five or more years ago. At least one of thetubes has been used for hundreds of hours. Then someunscrupulous operator got hold of them, washed off theoriginal base date -code and brand, and rebranded themwith a new warranty code-all unknown to the originalmanufacturer. This unethical practice is carried on to-day using the tubes of almost all leading brands, not justthe one shown in the picture.

These tubes, purchased over the counter at a "bar-gain" price by TECHNICIAN editors, are typical of therebranded tubes being sold across the country as new.Observe that two tubes came in plain boxes, with onlyrubber stamped or penciled marking on the cover. Onetube came without any box.

Be suspicious of plain boxes. Original manufacturer'sindividual cartons are a worthwhile safeguard. BESAFE-BUY BOXED!

Overlooked OpportunitiesTechnicians generally overlook a wonderful oppor-

tunity to boost their profits in a manner requiring avery minimum of effort. It might be summed up in asimple slogan: Sell While You Service! Recognize thewonderful position you are in when you enter a cus-tomer's home to repair his set-a position for whichmost salesmen would be very grateful. You come by in-vitation. You will remain in the house for some time.You are the electronic expert. You will be the center ofthe customer's attention.

Take the opportunity to do some selling-the lowpressure kind. It's legitimate, and the customer shouldbe appreciative that you called a particular product orservice to his attention. Here are some approaches:

1. Keep your eyes peeled for audio opportunities. Inlarge houses, intercoms between kitchen and work shop,or baby's room and living room or patio are very con-venient. Other occasions for audio sales are in the homeof a music lover (adding extra hi-fi speakers, peakingthe sound system for optimum performance, etc.) andthe home of someone hard of hearing (TV sound induc-

tively coupled to hearing aid, audio-visual devices, etc.).2. It's easy to praise the beauties of color TV . .. and

hint the social prestige. The next step is a casual invi-tation detailing where and when it can be seen.

3. Alerting the customer to a weak or partly wornelement can mean a sale to you, and a saving to cus-tomer of labor charges on a future service call. Incident-ally, by explaining that a part is weak but still workablefor a time, you protect yourself against future accusa-tions that the job was not done properly.

5. Wherever you see a table model TV set that couldbe made more convenient if it could be moved, talk upthe appeal of attractive swivel tables. Women are ofteneasy to sell on this item.

6. Don't pass up the sales appeal of remote controlsfor TV receivers. Its comfort giving potential is sure toplease many a channel -changing set owner.

With this as a start, other sales ideas will occur toyou. Remember that the approach should be subtle soyour customer does not feel he is being pressured. Butdon't overlook opportunities: Sell While You Service.

Do You Talk Too Much?An industry old-timer describes a noteworthy ob-

servation in our "Letters to the Editor" section thismonth. He says that service technicians talk too muchfor their own good, telling the customer exactly what is

wrong with his set. Then the dollar -conscious set ownervisits the local distributor and buys the needed part henever could have found by himself.

Quiet, please!


t-timitig In theHEAT AND HUMIDITY, abnormally high in many

parts of the country this summer, have played havocwith TV set performance. Multiple troubles involvingleaky capacitors and changed resistance values arecommon results. In the areas affected, some shops areloaded down with three or more times the usual numberof defective sets requiring bench work. If your area hasbeen hit by abnormal hot -wet weather, save yourselftime by being on the lookout for troubles of this nature.

HURRICANES will knock down over 100,000 TVantennas on homes along the Atlantic coast thisyear, predicts Harold Harris, Channel Master VP.His advice to antenna owners, which techniciansshould pass on to their customers: find out if yourTV antenna is included in your present personal andproperty liability insurance policies.

"DON'T DO IT YOURSELF" is the slogan beingstressed by Betty Furness on the Westinghouse "StudioOne" TV show. See your service technician, is themessage going to more than 20,000,000 viewers weekly.

WHAT'S TROUBLING YOU? Early reports fromreaders on their ratings derived from "Your TroubleScoreboard," published in the August issue, indicatethat the situation is generally under control. Jan'sRadio Shop, Erie, Pa., has a Troublemeter rating of34, which is pretty fair shape. Out in California thescores run 55 to 60, or normal. What's your score?

Rebranded "bargain" tubes purchased over the counter by TECH-NICIAN editors. The two 6K6GT's were bought in the plain boxesshown, the 5U4G without any box. All three were actually madeby RCA, but not two years ago, as indicated on the base date -code.One 6K6GT was made previous to 1950, the other ea,ly in 1951.The 5U4G was made before 1951, and has been used for hundredsof hours. Unknown to RCA, some unscrupulous operator washed offthe original brand, and rebranded all these tubes w.th a newerdate code. Similar techniques are used with tubes made by othermanufacturers. Superficially, the tubes look good. To make certainyou don't get stuck with such tubes, BE SAFE-BUY BOXED . . .in the manufacturer's original carton.

SMASH THE TUBE RACKET campaign pro-moted by Philco offers 5¢ for every old tube turnedin on a new Philco tube. The junked tube is smashedright in front of you. The company is also conductinga fix -it campaign for $1 plus parts to have the publicbring their radios into local shops for repair.

STATISTICAL ROUNDUP: Some 37,500,000 TV setsare in use as of Oct. 1. Over 7,000,000 TV sets will besold to the public in 1955. 2/3 of all family units have TVreceivers. Half of the sets in use are 21 -inch. 1,300,000TV's will be scrapped in 1955, over 90% of them 17 -inchor smaller. Over 80% sold this year were 21 -inch.

TDGF. Yep, Technician's Dumb Girl Friend is backafter insisting she wanted to try on a single sideband. . . thought it was a half -girdle. She thinks high -Qis found in a pool room, mu only comes from cows,and a chassis cradle is another name for a hammock.She burned her boy friend by giving him a coronato smoke, claims a nut driver is an asylum chauffeur,and reports that flux is her favorite toilet soap. Sheswears that pot noise is only her stomach gurgling.

PRE-RECORDED TAPE is growing into a profitablesideline for some dealers, who also find that these taperecordings are excellent demonstrators, boosting re-corder sales. Two relatively new companies marketingthese tapes at $6.95 for a 7 -inch reel, with special dis-count arrangements for dealers, are Recorded Tape ofthe Month, P. 0. Box 195, Radio City Station, New York,N.Y., and Berkshire Recording Corp., 150 W. 90 St., NewYork 24,, N.Y.

OCTOBER 1955 NETWORK COLOR TV SCHEDULESATURDAY, October 1

9:00-10:30 PM (EDT) NBC "Heidi"(Max Liebman Presents) (Live)

MONDAYS through FRIDAYSOctober 3-7, 10-14,17-21, 24-28, 31

5:30-6:00 PM (EDT) NBC "Howdy Doody"SUNDAY, October 9

7:30-9:00 PM (EDT) NBC "Show Biz"(Color Spread)

SATURDAY, October 153:00--5:30 PM (EDT) NBC "Notre Dame vs. Mich. State"

(NCAA Football Game) (Live)

(Live)

(Live)

MONDAY, October 178:00-9:30 PM (EDT) NBC "Cyrano de Bergerac"

(Producers' Showcase) (Live)TUESDAY, October 18

8:00-9:00 PM (EDT) NBC "Milton Berle" (Live)SUNDAY, October 23

4:00-5:30 PM (EDT) NBC "Alice in Wonderland"(Maurice Evans Presents) (Live)

SATURDAY, October 292:30-5:00 PM (EDT) NBC "Iowa vs. Michigan"

(NCAA Football Game) (Live)MONDAY, October 31

3:00-4:00 PM (EDT) NBC "Matinee Theatre" (Live)In addition to the above schedule, NBC will color -cast all WorldSeries games played in New York. There also will be color inserts inthe "Home Today" show.CBS plans an extensive schedule which is not available at press time.


"kWEASY CREDIT for pix tube installations is available

through a General Electric finance plan. Technicians arereimbursed in full by their GE tube distributor for GEtubes, parts and labor. Customer pays as little as $5down, and has six months to pay.

PAY -AS -YOU -SEE TV: In a brief filed with theFCC, Int'l Telemeter Corp. predicts TV "road -showing" of top Broadway stage hits throughout thecountry at an eventual cost of 30 to 40 cents perhome per show, using its system. Estimate is basedon the expectation that 8 million sets-almost onequarter of the total number now in use-would payto get one of these shows.

DO YOU WANT TO WIN a free signal tracer worth$348? Or a $329.50 oscilloscope? Or any of 104 otherprizes? Then fill out the entry blank for the TechnicianTest Equipment Contest in this issue, and mail it in rightaway. No boxtops or gimmicks required.

Prophetic vision of sound transmission system of the future, from anengraving made in 1673, was conceived by Athanasius Kircher. Con-versation of people in the court at the lower left is carried through"amplifier" tubes shaped like the spiral cochlea inside the ear. The


Oct.

Oct.

Nov.

Oct.

CALENDAR OF COMING EVENTS

3-5: Eleventh National Electronics Conference, Hotel Sher-man, Chicago, Ill.

12-'5: 1955 Convention Audio Engineering Society, Hotel NewYorker, New York, N. Y.

4-6: Philadelphia HigF Fidelity Music Show, Benjamin Frank-lin Hotel, Philadelphia, Penna.

21-23: New England Hi-Fi Show, Hotel Touraine, Boston, Mass.

TRANSISTORS continue to make news. Raytheon hascome out with a new transistorized twin -speaker per-sonal radio that plays for 2500 hours, or two yearsnormal playing time, on an "A" battery pack. The $89.95unit will play for 500 hours on four flashlight batteries.GE is making a 15 -ounce pocket radio for $49.95, whichhas five transistors and measures 5 5/8 x 3 3/16 x 1 1/2in. GE has also announced transistor price cuts of 15 to50%, bringing the price range down to $2-$3 in quantitylots to manufacturers.

tube feeds a "loudspeaker'. in die form of a sculptured head, as shownon the rig It. For more information on remarkable forecasts in TV -elec-tronics, see "Your Electronic Future," page 28, which heralds an $8billion servicing industry by 1975. (Bettrnwi Archive)

k2L:\\4'"

"' 7-

Ni

-

1.-

23

Test Equipment Standards forStiffer Requirements Are Made of Service Instruments; Why

ROBERT G. MIDDLETON,

SIMPSON ELECTRIC CO.

Since operation of color -TV re-ceivers is considerably more criticalthan black -and -white sets, some-what better sweep -alignment equip-ment is required for satisfactorycolor servicing. "Better" involves theaccuracy, or the flatness of the out-put, as illustrated in Fig. 1. Unlessthe output voltage over the sweptband is reasonably flat, the techni-cian will misalign the receiver cir-cuits in unknowingly compensatingfor the non-linear generator char-acteristic. Fig. 2 illustrates the tech-nique used for determining linearityof generator output.

By "better" is also meant the ac-curacy of the marker frequencyindication. Although an experiencedoperator, fully aware of inaccuraciesin a marker generator, can makenecessary allowances in readings(See Calibrating Your Signal Gene-

rator, p. 20, July 1955), it is generallydesirable to use a marker generatorwhich is crystal calibrated over thecolor -signal ranges. Small inaccura-ries in locating the color-subcarrierand sound -trap frequencies can lead

Fig. 1A-Acceptable linear sweep -generatoroutput. B-Serious nonlinearity of output.

O

O

to serious trouble in color reception.The output from the marker gene-rator must also be adequate in level,and it is preferable to utilize an in-strument which operates on funda-mentals.

A sweep generator for color -tele-vision service must also provide ex-tended low -frequency sweep, to meetthe requirements of aligning thebandpass amplifier, of checking theresponse of the Y amplifier, adjust-ment of the wideband demodulator(I circuit), and checking of the nar-row -band demodulator (Q circuit).It is also desirable upon occasion tocheck the responses of the red, green,and blue video amplifiers, and to

Fig. 2-Arrangement for linearity checking.

check the frequency response of thematrix circuits. Such checks (seeFig. 3 for some typical responses)require sweep -signal output down toat least 50 kc, and preferably downto 15 kc, so that auxiliary low -frequency tests do not have to bemade at the bench.

Although narrow -band scopeshaving response only through theaudio -frequency range serve ade-quately for alignment of color -TVcircuits, wide -band scopes are re-quired for troubleshooting. For ex-ample, the color burst on the backporch of the sync pulse seen in Fig.4A cannot be displayed properlyunless the scope has full response at3.58 mc; likewise, checking the re-sponse of chrominance circuits tocolor signals requires full responseat 3.58 mc. See Fig. 4B.

It is sometimes considered that anarrow -band scope can be convertedtp a wide -band scope by applyingthe signal directly to the vertical-deflection plates of the cathode-raytube. This supposition is true, pro-

OFig. 3A-Q channel responseResponse of red amplifier 160 cps to 3.5 ma

vided sufficient signal voltage (about75 volts minimum) is available with-out additional amplification to excitethe plates. In general, however, thecolor signal voltages are far less, andcannot be displayed in this manner.

Some auxiliary scope amplifierswhich have made their appearance,however, serve satisfactorily to con-vert narrow -band scopes to wide -band scopes. Some manufacturersprovide scope conversion kits, where-by older narrow -band scopes can berendered suitable for color -TV ap-plication. In any case, it is essentialto note that the separate amplifiersdo not operate as pre -amplifiersfor the existing vertical amplifier inthe narrow -band scope, but replacethem completely.

Experience with color -TV servic-ing procedures soon convinces thetechnician that open test leads areoften unsuitable because of humpick-up, stub -resonance action, andcircuit loading. Fig. 5A shows thesevere blurring of pattern caused bypick-up of stray fields from thehorizontal -deflection circuits, withthe enormous improvement which isobtained when a shielded input cableand probe are used, as illustrated inFig. 5B.

r.

24 TECHNICIAN October, 1955

COLOR SHORTS

Color TV ServicingThese Increased Demands Are Necessary

Nowt 000000

Fig. 4A-Horiz. sync pulse showing burst sig-nal (right -to -left scope defledion). II-Ap-pearance of signal In chrominance circuits.

(There is some misunderstandingconcerning true "probe" devices;these are often confused with signalcable termination devices. A true"probe" device is an input arrange-ment, while a "termination" deviceis an output arrangement. Thus,sweep generators use terminationdevices, while scopes use probe de -

e, vices.)Probes used in color -TV service

work include the low -capacitanceprobe; the high -voltage capacitance -divider, for use in checking high -voltage circuits; and a signal -tracingdemodulator type of probe, whichfinds useful application in variousalignment procedures, in signal -trac-ing high -frequency circuits, and inchecking the accuracy of sweep gen-erators, as already illustrated, earlier.

It should be understood that nomatter how fine the characteristicsof a probe may be, it cannot performbetter than is permitted by the scopeitself; in other words, a poor verticalamplifier in a scope cannot be im-proved by use of a probe. The scopeshould always have better character-istics than the color -TV circuit undertest, in order to obtain a definitivetest result.

In heavily industrialized and in

rural areas, the service technician isoften annoyed by fluctuating linevoltage. Service scopes are not al-ways completely regulated, and thelow -voltage power supply in a color -TV receiver is even less likely to beregulated. In consequence, patternjitter as illustrated in Fig. 6 is some-times encountered. Such jitter can beavoided by the use of an automaticline -voltage regulating transformer.Confusion is sometimes encountered,by failing to distinguish between amanually variable transformer, andan automatic regulating transformer.The latter type is required to elimi-nate jitter. It is also useful in provid-ing better accuracy of voltage mea-surements, by maintaining the inputvoltage to the receiver at its ratedvalue of 117 volts.

O

OFig. 5A-Trace blurring caused by stray pickup.B-Lead shielding cleans up the same pattern.

Fig. 6-Line-voltage fluctuation produceshorizontal jitter; better regulation needed.

"COMPACT" COLOR TV: Largecabinet size, made necessary bychassis size, has been an obstacle toacceptance of color receivers. Ray-theon has introduced a space -savingvertical color chassis that fits aroundthe 3 -gun 21 -in. tube, reducing cabi-net size to proportions comparableto those of present monochrome sets.Available in table -model ($795) orconsole ($895) versions, the re-ceivers feature 28 tubes includingcrt and rectifiers and top tuning,with only 2 external color controlsin addition to the conventional con-trol line-up found in b -&-w sets.

INCREASED COLOR PRO-GRAMMING for the remainder of1955, with still further increases duenext year, will boost consumer inter-est in buying the receivers. NBCalone promises 120 hours of colorbroadcasting from October to theend of the year. This represents a5 -to -1 increase!

MERCHANDISING WITHCOLOR, tried experimentally byGimbels N. Y. department store, at-tracted considerable attention. UsingDu Mont's Vitascan pickup andtransmission system in an in-storeclosed circuit, Gimbels broadcast10 -minute hourly merchandisingperiods in full color. Monitors spot-ted throughout the store and in astreet window attracted thousandsof shoppers, who were also invitedto see themselves in color TV. Re-sult was a "gratifying increase" instore traffic and sales, with new im-pulse buying on items featured inthe demonstrations.

PRICE CUTS ON COLOR SETShave been announced by CBS -Co-lumbia. The 205C color receiver, afull -door console fortnerly priced at$1100, has been cut to $795. The setuses the CBS-Hytron 205-sq.-in. crt.

NEW SERVICE MANUAL onRCA color sets, 36 pages, has beenannounced as a supplement to"Practical Color Television for theService Industry." In addition to ad-ditional information on color in gen-eral, schematics and other detaileddata on the manufacturer's current21 -in. color receivers and servicehints and procedures are featured.Price is 75 cents through distribu-tors. With acquisition of more build-ing space at Lancaster, Penna., RCAalso announces plans to step up pro-duction of color kinescopes, as wellas other tubes.


"Tough Dog" CornerDifficult Service Jobs Described by Readers

Pix Bounces with AudioThis "beaut" had us going in cir-

cles for a while . . . We took in aSilvertone, chassis 528-292-2, for re-placement of the deflection yoke.After restoring the set to operationwe found the picture bounced intempo with the audio. Naturally, thecustomer denied that the set hadever done this previously-althoughhis wife inadvertently dropped acontradictory statement to the effectthat this had always annoyed herwith the set.

Investigation showed that therewas nothing wrong, and therein liesthe tale. Voltages were checkedcarefully in the 6W6-GT audio out-put stage; all agreed with thosegiven on the schematic, and all ofthem fluctuated with the audio.Fluctuation was extremely bad onthe cathode, which ties directly tothe 125-v bus. The schematic dia-gram calls for -2.5 v on the controlgrid, which was present, but thetube manual recommends -7.5 v insuch operation.

An audio -frequency sine wavewas fed into the audio amplifierstages, and the output was scopedat the plate of the 6W6-GT plate.There the trouble was indicated bythe distortion in the waveform.

Insufficient grid bias was causingthe tube to draw excessive currenton positive audio peaks at the grid.Since this current was drawn fromthe 125-v bus, which is the B -plussupply line for the i-f, age and sync

stages, all of the mentioned portionsof the receiver suffered in step withaudio peaks that loaded this voltagesource heavily.

One slight modification, the sub-stitution of a 3k, 10-w resistor (R1in the accompanying sketch) inplace of the 15k, 2-w resistor thatwas originally in the circuit, put op-erating voltages where they be-longed and cleared up the symptom.-Richard E. Simpson, Hialeah,Florida.

No Piz, No SymptomsAbsence of a picture, in this case,

could be traced to the video ampli-fier stage itself: video signal waspresent at the grid of this tube, butthere was no signal at the plate. Avoltage check of the tube in thisconventional video -amplifier stageshowed normal B -plus present at theplate and screen grid. Zero voltagewas at the control grid, and 12 voltswere found at the cathode, indicat-ing that the tube was conducting.As a further check, the tube was re-moved from its socket and a readingwas then taken at the cathode pin.The reading at this point nowdropped to zero, showing that the12 volts bias was being developedentirely by tube conduction-butthere was still no output at the plate.

The set was turned off and resist-ance measurements were made. Theplate resistor checked okay. Thecathode resistance consisted of a 47 -ohm fixed resistor in series with a

Heavy drain on audio tube dropped B -plus to other tubes, caused pix to bounce with sound.

o e $10 For Your "Tough Dog Story"

Have you tangled with a difficult or ob-scure service problem recently? Write it up,telling us how you liked it. Use drawings toillustrate your explanations wherever neces-sary. A rough sketch will do as long as itcan be followed. Send it to "Tough Dog"Editor, TECHNICIAN, Caldwell -Clements, Inc.,480 Lexington Ave., N. Y. 17, N. Y.

1000 -ohm potentiometer to ground.As this pot, the contrast control, wasturned, cathode -to -ground resis-tance varied from about 50 to 1000ohms, as expected.

Another tube was substituted. An-other vtvm was used to check allprevious measurements. The resultswere the same, with all readings stillwithin normal range, and still nopicture. Observation had thus farindicated that the tube was cuttingitself off with its own cathode bias!When basic electronic principles nolonger seem to apply, experience hastaught, there is almost always someoversight or error in observation.

In this particular case, voltagemeasurements had to be assumed tobe correct, since they were takenwith two different meters while theset was in operation and the defectwas present. However, there couldbe a false indication in the resistancemeasurements since they had to betaken, of course, with the set turnedoff. Readings taken during opera-tion, if possible, might have beendifferent. Substitution would be oneway of making sure, in the case ofthe plate load resistor. In the case ofthe cathode -circuit resistors, ajumper applied first across one andthen the other during operationshould indicate something. Sureenough, a jumper across the 47 -ohmresistor brought back the picture.This resistor, which checked okaywithout load, evidently was increas-ing considerably in value when sub-jected to current flow.

The resistor was replaced, the setwas restored to operation, and Ohm'sLaw once again was inviolable.-Ivan White, Albuquerque, NewMexico.


Antenna System ProblemsShielding Out Ignition Noise; Transmission Line Woes

Suppressing Ignition TVIWhere reception is seriously ham-

pered by noise flashes caused by theignition systems of passing traffic ina nearby busy street, strips ofchicken -wire screening laid on theroof -top can effectively minimize theproblem.

In one such installation, the stripswere bonded together to form a con-tinuous ground plane shielding theantenna from the street, as in Fig.1A. Bonding consisted of joining thestrips well mechanically and thensoldering them together. The stripsalso had to be bonded to the mastbut, since soldering at this point isdifficult, clamps were used. Theantenna was so positioned back onthe roof that a straight line drawnfrom any point on the street below,including the opposite curb, wouldhave to pass through the ground -plane screen in order to reach theantenna.

For effective operation, the protec-tive screen must also be grounded.Since the driven element of theantenna used was a folded dipole, theuse of a separate ground wire fromthe roof to an earth ground wasavoided. Since the mid -point of afolded dipole is neutral, the screenwas connected to this point by meansof clamps from the mast to the cen-ter of the dipole, as shown schemati-cally in Fig. 1B. In this way, thetransmission line could be used asthe ground lead. To bypass the igni-tion interference to ground whilepermitting signal to reach the set,the illustrated filter was installednear the receiver's antenna terminals.The 5k resistors across the line aretoo large to create a mismatch. The0.001-mfd capacitors couple high -frequency signal into the set, butblock the lower -frequency TVI,which passes through the resistorsand to earth ground, by way of thecenter -tap connection, to a waterpipe or other suitable point. Thereceiver chassis itself was connectedto the water -pipe ground through a0.1-mfd conderser, not shown.

Reradiated JitterIn the course of cleaning the living

room, a housewife will often bundleup the transmission line and hang it

on the back of the TV set, where itis fairly close to the yoke leads, andthen go on about her chores. Muchlater, when she turns the set on, shemay find a nice case of jitter, vertical,horizontal or both. Making no con-nection between her action and thesymptom, she calls up for TV service.

The large pulse voltages on theyoke leads do not ordinarily causetrouble, but can do so if the antennainput runs too close to them. Rein-troduction of the pulses into theantenna input-after delay by thereceiver circuits-will give thesweep oscillators two sets of pulsesto try to keep step with, and jitterresults. The remedy, of course, isantenna lead dress so that the house-wife can't repeat her mistake.

Antenna Test PrecautionIntermittent snow, flashing in the

pix and crackling in the sound areoften caused by a defect in the an-tenna system, but may also originatein the set. To determine whether theantenna system is at fault, the tech-nician often disconnects the trans-mission line from the outdoor anten-na at the set, and hooks up an indoorantenna in its place. If the symptomspersist with the test antenna, thecause is assumed to lie in the re-

ceiver, which is then taken to theshop.

Look out! You can often be fooledinto unnecessarily pulling a properlyfunctioning chassis. Before you jumpto any conclusions, make certain thatthe lead-in from the outdoor antennais lying several feet away from thetest antenna and its lead. If the twoleads come close at any point, signalmay be coupled from the outdoorantenna into the test antenna, andthe symptoms can be thus inducedin the set during the test, althoughthe fault lies in the outdoor antenna!This effect has been observed morethan once. Aside from the loss oftime involved, there is always theproblem of embarrassment over hav-ing made an error, loss of the cus-tomer's confidence, and possible lossof the customer.

Better be sure than sorry. Makecertain that the roof -connected lead-in is well out of the way before youmake observations.

flints on Ignition TVI and Rera-dial ed Jitter were contributed byA. R. Clawson of Brooklyn, N. Y.The hint on the Antenna Test Pre-caution was submitted by John L.Mancini of Winthrop, Massachusetts.

Fig. 1-Set-up for chicken -wire shield to keep ign;tion noise from street traffic out of set.

MAST

GROUNDTO MAST

CHICKENWIRE

BOND

ROOF

ANGLE FROMSTREET

CHICKENWIRE

riWATER PIPEGROUND SET ANTENNA

TERMINALS


Tuner Oscillator TesterSimple Bench Aid Speeds Critical Front -End Check

CLARENCZ C. FULLER

When tuner trouble is suspected,some method of determining justwhat the oscillator is-or isn't-do-ing is very desirable. Just replacingthe tube itself doesn't tell a greatdeal if this procedure doesn't putthe set back to work. Measurementof the injection voltage tells a greatdeal, but this is usually difficult toaccomplish, especially if it is at-tempted with the chassis still in thecabinet. To determine the actualvalue of the excitation voltage, os-cillation must be stopped momen-tarily. Accomplishing this is awk-ward. In UHF, particularly, tubereplacement may tell very little.

The device described here willwork without the need to disconnectany wires. All that is required is ac-cess to the B -plus lead to the plateof the oscillator, at some point be-tween the B -plus dropping resistorand the plate load. Direct contact tothe plate, of course, would upset os-cillation when not desired.

The tester consists of 5 switch-selected resistive shunts that may beselectively inserted between oscilla-tor B -plus and ground. As B -plus isprogressively lowered or increasedwith the switch, effects upon oscilla-tion and injection voltage are ob-served.

Few Parts Required

Parts needed for the tester include5 1 -watt resistors, with one each ofthe following values: 560, 1200,1800, 3300, and 5600 ohms. A switchwith at least 5 positions is alsoneeded; the one used in this casewas a Centralab 1401 unit, with 6positions. Also used were a pair ofinsulated leads, each 18 in. long; apair of alligator clips; 1 woodenbaseboard (2 in. x 3 in.) ; a panel formounting the switch on the board;and a terminal strip.

The 560 -ohm resistor was con-nected to the no. 1 terminal on theswitch. Terminal 2 was left blank,with the 1200 -ohm resistor connect-ed to terminal 3. The 1800-, 3300-,and 5600 -ohm resistors were con-nected respectively to the 4th, 5thand 6th switch terminals. The other

ends of these resistors are broughtout to the terminal strip. One of thewire leads is connected to the re-sistors at the terminal -strip end; theother lead is connected to the per-manent contact on the switch. Thepanel is then attached to the switchand mounted on the wooden base.Alligator clips are connected to theleads.

In use, one lead is connected to theoscillator B -plus end of the loadingcoil and the other to ground. If thetuner is of the UHF type that uses acrystal for a mixer, monitoring is

Circuit diagram of handy oscillator tester.

accomplished by measuring the volt-age across the crystal. In most tuners,the voltage drop across this crystalis in the same range; if in doubt asto its value, however, consult themanufacturer's notes. Many tunersprovide a test point for convenientmeasurement of this voltage drop.The Zenith UHF tuner is an example.

In the case of the Zenith tuner,which the writer has had occasion toexamine with the tester, the volt-meter will give a reading somewherebetween 0 and 0.2 volt at the testpoint. While the meter is still con-nected, switch the tester to the 560-ohm resistor. This will reduce platevoltage to the point where oscillationwill stop. When the oscillator quits,there should be an increase of thevoltage reading in the order of 0.1olt. This rise indicates the excitationvoltage. If the swing is much lessthan 0.1 volt, trouble is indicated.

Even if the tuner is working, a lowvalue of excitation voltage indicatesmarginal performance, and perhapsintermittent operation. Try anothertube and again make the tests. If noimprovement results, something is

probably wrong with the crystal orassociated circuits. If improvement isnoted, additional tests should bemade to see whether the new tubeis likely to stay on the job. Tune thereceiver to the highest channel avail-able in the area and retest. Failuresare more likely to occur in the higherchannels.

Progressive Checking

Switching to the 1200 -ohm resistorwill also usually stop oscillation. Ifit doesn't, above -average operationis being achieved and the tube isprobably an exceptionally good one.With the 1800 -ohm resistor in thecircuit, the tube is definitely open tosuspicion, in the case of the Zenithtuner, if oscillation stops. Some tubesmay even fail with the 3300 -ohm or5600 -ohm resistor in the circuit.These should be discarded at oncewithout further question, eventhough they appear to be operatingproperly with normal voltage. In dif-ficult receiving locations, try to finda tube that will pass the 1800 -ohmtest. It can save many call-backs.

Although the figures given herewere worked out with the Zenithuner, the same pattern of testing can

be applied to other front ends. Dif-ferent values of resistance or differ-ent voltage levels at which oscillationshould still be evident may have tobe worked out. These values arereadily determined by trial, as wasdone with the Zenith tuner.

In testing VHF front ends, proce-dure is pretty much the same, exceptthat the test point is different; inthese, the meter monitors the voltageat the mixer grid. Depending on themake of tuner, the value will rangebetween -2.5 and -7.5 volts duringoscillation. When the oscillator isstopped, this voltage practicallyswings to zero. As with the UHFtuner, the 560 -ohm resistor will stopthe oscillator in all cases. As for thevalue of shunt resistance with whichoscillation should resume, the oper-ator is better off establishing his ownstandards depending on the tunermake.

The device described is as handyin the customer's home as it is onthe bench.


Let's Look At CircuitsNo. 4. The Noise -Inverter Sync Stage Improves Stability

SIDNEY C. SILVER, MANAGING EDIIOR,TECHNICIAN

Preceding the horizontal andvertical oscillators in the sync -sweepcircuits of representative TV sets,we find a common sync strip of oneor more stages. With the compositevideo signal as its input, this strippicks off or separates only the syn-chronizing pulses, for application tothe oscillators, while rejecting videoinformation. The sync stage shownhere does just that, but it adds aflourish. It can tell the difference be-tween true sync pulses and mostnoise pulses, thereby protecting thesweep oscillators from getting"fooled" by the wrong kind of in-formation.

In separating or clipping pulses,the usual sync stage takes advantageof a characteristic of the compositesignal: pulses and video intelligenceappear at different levels. With thepolarity for the signal shown atwaveform A, for example (2 hori-zontal cycles), pulses are in the posi-tive region, while video signal isrelatively negative. If the separatoris designed to conduct only on posi-tive swings at the input, the outputwill show only sync pulses.

This very sensible arrangement,used in most receivers, works welluntil some interfering conditionthrows noise pulses into the videosignal. If these noise pulses happento have the same polarity as the syncpulses, and are equal or greater in

amplitude, they will pass right onthrough and may subversively trig-ger the oscillators, producing loss ofsync.

The sync clipper shown in the ac-companying schematic !las an addedfeature that helps the stage distin-guish between true sync pulses andnoise spikes. In various forms, it hasseen widespread incorporation in TVreceiver design over the past coupleof years. As shown here, the stageuses a pentagrid tube, similar in ap-pearance to those functioning asconverters in AM or FM receivers.The tube provides the advantagethat it can accept two input signalsat different grids, with the outputdepending on both of them.

The chief input, with pulses posi-tive, enters at point A (from theplate of the video amplifier, in thiscase). At its other input, point B,the stage receives the same signalwith two important differences. Firstof all, the amplitude of the signal, as

by the size of the arrow,is considerably smaller than that ofits counterpart at the other grid. Inthe second place, as indicated by thedirection of the arrow, its polarity isreversed. To fulfill these qualifica-tions, waveform B simply need bepicked off at a point one stage ofamplification ahead of waveform A.It therefore comes from the inputrather than the output of the videoamplifer-or right from the videodetector output.

The stage must be biased so that

Pentagrid stage, using two inputs, passes true sync pukes but keeps noise spikes out.

SYNC CLIPPERE. NOISE LIMITER

R3

VIDEO LeAMPLIFIEROUTPUT

VIDEODETECTOR

OUTPUT _'-(CUTOFF)

R2

2nd SYNCSTAGE

LOW B+

the negative pulse tips of signal Balmost (but not quite) drive thetube into cutoff at its first grid, asshown. During normal operation,then, the only effect of waveform Bis to produce a slight degenerativeeffect on the tube's output, reducingit in amplitude. Should a large noisepulse occur, it will appear in bothwaveforms, A and B, at the same in-stant. Since its size will drive thestage to cutoff at grid B, the pulse iskept out of the output, shown aswaveform C.

(Fine theory-maybe! What hap-pens when a noise pulse not quitelarge enough to cut off the tubecomes along? What happens if anoise pulse cuts off the tube duringsync pulse time? For the answers,see the next installment of Let'sLook At Circuits.)

COLOR TV ON TAPE

A cross country color telecast byvideo tape recording was shown to agroup of the country's top indus-trialists recently when MinnesotaMining and Mfg. Co. dedicated itsnew Central Research building.

Both TV sound and picture camefrom a reel of magnetic tape, ratherthan from film or a live pickup. Thedemonstration was conducted byRCA. It originated in New YorkCity and was transmitted by closed-circuit to Minneapolis' Foshay tower.

The 15 -minute telecast repre-sented years of research on 3M mag-netic tape and on the highly complexRCA video tape recorder on whichit was used. Previous demonstra-tions of video tape recording-calledVTR-have been confined to labora-tories only, or at the most, transmis-sions of a few miles. As a result, thiscross-country video tape telecast isregarded as a milestone in a devel-opment that has been long -antici-pated by the TV broadcasting indus-try.

In VTR, television industry lead-ers see answers to several of theproblems which exist using conven-tional motion picture film, especiallycolor: 1. Magnetic tape requires nochemical processing, offers immedi-ate viewing; 2. Copies of tape re-cordings may be duplicated simul-taneously from a master; 3. Tapescan be preserved indefinitely or maybe electronically erased and re -used.


TECHNICIAN TEST EQUIPMENT CONTESTOver $2400 in instrument prizes will be given away to 106 winners!

Prize No. Value

1st $348.002nd $329.503rd $269.504th $139.85

5th $126.506th $120.00

7th $104.70

8th $99.959th $99.50

10th $97.5011th $89.5012th $69.5013'h $68.9014th $68.0015th $50.3516th $29.95

17th $25.0018th $24.5019th $19.95

20th $19.95

215t $19.95

22nd $18.2823rd $15.8524th $14.90

25th $9.9526th $8.50

Instrument

HICKOK Model 650: Signal Tracer

WESTON Model 983 5" Oscilloscope

HYCON Model 617 3" Oscilloscope

TELETEST FT100 Flyback Tester,

Tester, (1355 Capacilester

SUPREME Model 655 5" Oscilloscope

Performance

Universal video generator for monochrome & color provides modulated r -f carrierfor receiver injection; checks linearity and operation of video stages. Alsoproduces white dots for color TV adjustment.4.5 me bandwidth; rise time 0.1 µsec: deflection sensitivity 15 my/in; phaseshift between H & V amps, 0' to 100 kc, 2° to 1 mc; calibrating voltages0.5, 5. 50, 503; Z-axis modulation input; sweep freq. 10-500,000 cps variable.4.5 me bandwi;h; V -amp sensitivity 0.1 v/in; sweep ranges 15 cps to 100 kc;TV V & H freq. 60 cps, variable phase; calibrating voltages 0.05. 0.15, 0.5.1.5. 5.0, 15, 50, 150; H amp sensitivity 0.075 vin.

RT203 Rejuva-FT100 ($44.95) Tests flybacks under full operating voltage, tests yokes andcoils for shorted turns. RT203 ($49.95) tests and reactivates crt. CT355($44.95) tests for leakage, measures capacity from 10 true to 50 µf.

V amp freq. response 20 cps to 100 kc; deflection sensitivity 0.3 On. H. ampfreq. response 20 cps to 75 kc; sensitivity 0.3 v/in. Will handle 60 cps squarewave. Sweep oscillator range 20 to 30.000 cps.

CLOUGH-BRENGLE Model 411 Audio Oscilla-20 cps to 1000 kc in five ranges; accuracy 2% plus 1 cycle from 20 cps to200 kc. 3% 200-1000 kc: output 10 v open circuit; distortion under 1%;tor output hum less than 5 my @ max. output, 0.1 my on LO.

JACKSON Model 49 Tube Tester & AccessoriesTester ($49.95; has 5" meter. Accessories include plug-in kit ($2.95), highresistance shorts tester ($6.95), filament current tester ($14.95), seleniumrectifier tester i$17.95), auxiliary tube socket kit ($11.95).

AUTHORIZED Model 204 Intermittent Analy-Input ac or dc either polarity; range monitored 0.5 to 575 v; % voltagechange for actuation. adjustable 5 to 65%; response time 0.02 sec; indication

7ef is pilot and/or buzzer; 4'/ in. meter; self -balancing.

TELEVISION ENGINEERS Model VI 000A

Tube Checker

RADION Model FSM500 Field Strength M

RAYTRONIC Model CB -77N ' Reamer"

ELECTRONIC TEST INSTR. "Vitameter-

SECO FB-4 flyback and GCT5 Tube Testers

SHASTA Model 201 VTVM

RADIO CITY Models

SIMPSON Model 355 "Midgetester"

VIDAIRE Model FT -100 Wave Trap Meter

HEATH Model V-7 VTVM Kit

"Vis-U-All'' tester lists over 300 popular tubes on chart; filament voltage 1.5to 117 v; five tube sockets; interelement leakage test for less than 3.5 meg;weight 10 lbs.

oforVHFUHF battery portable covers channels 2 through 83. including FM hands.Relative and direct readings in µv. Measures radiation, lead-in SWR; locatesinterference.Portable unit tests crt's for element continuity, shorts, leakage, emission. gascontent. Repairs crt's by cathode sweeping, burning off interelement shorts.expanding aperture. Weight 12 lbs.Portable unit ter.s crt's for continuity, shorts, beam current, gas content. Repairscrt's shorts, vitalize cathode, welds open filaments and cathodes. Weight 10 lbs.

FB-4 ($38.95) measures flyback retrace time interval; also tests yokes, trans-formers. GCT5 ($29.95) grid circuit tube tester checks control grid emission.gas. shorts.

DC: 11 meg input; 7 ranges to 1500 volts; accuracy 3% full scale. AC: input to1.5 meg; 7 ranges to 4000 v; accuracy 5%; 7 resistance ranges to 1000 megs.

480 8 453 MultitestersM odel 480 ($14.45) ac & dc to 1000v; 1000 ma dc; ohms to 10 meg; db -8to 55. Model 453 ($35.50) 20.000 ohms/v; dc to 5 kv; 100 µa; to 500 ma.20 meg; 1 kv ac; db 12 to 55.Dimensions 2-2/3 x 4-1/2 x 1 in. AC & DC voltages to 1200 v in 5 ranges@ 10.000 ohms/v; resistance to 10 meg in 4 ranges. Accuracy 3% dc, 5% ac.Weight 7 oz.Unit quickly determines type of filter or trap to use in any TV installationby switching filter into ac or antenna circuits simultaneously.

7 dc voltage ranges to 1500 v; 7 ac ranges to 4000 v ac; ohms x 1 meg in7 steps; 4'/ in., 200 µa meter; 11 meg input impedance; de polarity reversingswitch.

CENTURY Model 201 Condenser -Resistor Ana -Tests condensers from 50 µAd to 150 ccf for leakage to 10 meg; shorts, opens,intermittents; resistors from 1500 ohms to 10 megs; coupling condenserswithout disconnect.lyzer

RADIO KITS Model M -3C Multitester Kit

TELEMATIC Model WT606 TVI Analyzer

POMONA Socket Kits & Meter Switch

SUPERIOR Model 770g. VOM

Volts ac -dc to 1500 v in 5 ranges; ma dc to 150 in 3 ranges; ohms to 200,000in 3 ranges. 1000 ohms/v sensitivity. 3" meter.

Calibrated condenser tuning identifies interfering frequencies. Wave traps andfilters operate singly or in combination.

"Socket saver," test adapter, surface broadboard socket kits for 7, 8, 9 pintubes. MS -1 meter reversing polarity switch.

AC voltage to 3 kv in 6 ranges. DC voltage to 1500 v in 6 ranges. Resistanceto 1 meg in 2 ranges. Current to 15 a dc in 3 ranges.

ELECTRONIC MEASUREMENTS Model 102E" ..volometer" measures ac & de voltages to 3 kv in 5 ranges; current to600 ma in 3 ranges ac, to 1.2 a dc in 4 ranges. Resistance to 1 meg.Multitester

BERKSHIRE Model 18 "labstrobe"

ALCO Model R20 Resistor Substitution Box

27-31s' $3.95ea SUPEREX CRT Adapter

32 -56th

57-81s'82-106'h

Provides 60 flashes/sec operating from 60 cps power line. For measuring motorand turntable rotation.

Rapid substitution of resistors from 10 ohms to 10 meg in multiples of 10,27 and 47 ohms.

CRT tube tester adapter permits measurement of pix tubes with present tubetesters.

GENERAL ELECTRIC Series Heater CheckersChecks pix tube heaters and 7, 9 and octal base tubes in series string receiverswith no external cornections.

RCA Multicords"

CBS-HYTRON Four -Way Tools

All-inone power cord with two types of cheater receptacles, power outlet,clamp -on work light.

Tool with Phillips and standard screwdrivers and 2 hex sockets aids removal ofsetbacks.


ContestRequirements

PURPOSE: This contest is intended to further the develop-ment of improved test equipment which the service technicianwants. Data compiled as a result of this contest will be usedto inform instrument manufacturers of the features theyshould incorporate in their equipment. Entrants' suggestionswill be in effect the collective voice of the servicing industry.

WHO MAY ENTER: This contest is open to all practicingTV -electronic service technicians and managers. Employees ofCaldwell -Clements, Inc., and their relatives, are not eligible.

HOW TO ENTER: Simply print or type your suggestionsanswering the question, "What features do you want to seedesigned into an all-around portable tester for TV servicing,"in the space at the right (additional sheets may be attachedif more space is needed). Drawings may be included. Then besure to fill in the answers to questions 2, 3, 4, 5 and 6, andyour name and address in the space provided at the bottom.Cut out the right half of this page along the dotted Ine andreturn to Test Equipment Contest, TECHNICIAN & CIRCUITDIGESTS, 480 Lexington Ave., New York 17, N. Y., alongwith a sample of your shop's letterhead, business card, orsimilar identifying material.

CLOSING DATE: All contest entries must be received orpostmarked no later than November 30, 1955.

JUDGING ENTRIES: Winning entries will be judged byTECHNICIAN's Board of Editors on the basis of three criteria:

I. How helpful features suggested are to service technicians.

2. Originality of suggestions.

3. Practical possibility of incorporating such features into acommercial instrument.

All entrants agree to have their suggestions dona'ed into thepublic domain. Entries will not be returned. Prizes describedon the preceding page will be shipped directly tc the win-ners. In case of ties, duplicate prizes will be awarded.

OBLIGATION: Contest entrants are under no obligationto purchase any product, or send in any material other thanthat specified in these contest requirements.

1. What features do you want to see designedinto an all-around portable tester for TV servic-ing? (Attach extra sheets if necessary.)

2. Note in 1, 2, 3, etc., order the importance youattach to the following features in deciding whichmanufacturer's test equipment to purchase:

Appearance-Manufacturer's

reputation-Cost

Performance range-Availability at jobber-Availability of

instruction manual;

-Availability ofmodification kits

-Locality of manufacturer-Ruggedness-Latest model-(Other)-(Other)

3. How many technicians work in your shop')

4. What is your estimated list price value of allthe test equipment your shop owns? $

5. What test equipment do you plan to buy in thecoming year?

6. What is the maximum amount you would bewilling to spend for the following instruments?$-Oscilloscope

S-VOMS-VTVM$-R F Signal Generator

$-Capacitance Che.:ker

$-CRT Rejuvenator

$-Sweep Generator

$-Tube Checker

$-Audio Generator

$--Marker Generator

$-Flyback Tester

$---Color TV Generator

NAME:

ADDRESS:

CITY: STATE:

liemembee to enclose o business letterhead, card or isaulvalent.)


Progress in New ProductsIRC NUT DRIVERS

Tension -Grip Nut Holding Nut Dri-ver, ideal for close work starting or re-moving, has tempered steel band thatgrips nut or hexagon head screw auto-matically as it enters socket. "Tension -grip" has spring action and is non-magnetic. Nut driver shaft is set inshock -proof plastic handle. Availableindividually in six sizes: 1/4", 5/16",11/32", 3/8', 7/16", 1/2", or in an at-tractive 48 unit counter display. In-ternational Resistance Co., 401 NorthBroad St., Philadelphia 8, Pa.-TECH-NICIAN (Ask for No. 10-70)

GC FUSE RESISTOR "".>Now available is a 7.5 ohm TV fuse

resistor, which is designed for replace-ment on any series -wired TV set bysuch makers as Motorola, RCA, Crosley,Hoffman, Zenith, Admiral, Raytheonand Sylvania. Tinned wire leads aresupplied plus male plug-in terminalsfor use with a mounting strip. The "G -C7.5 Ohm Fuse Resistor" (Catalog No.9207) is individually packaged and listsfor $0.55 (net $0.17). General CementMfg. Co., 919 Taylor Ave., Rockford,Ill.-TECHNICIAN (Ask for No. 10-71)

GEE TUBE TESTER

Tube Tester Kit 327A at $33.95 hasdouble fuse protection for both meterand transformer. Manufacturer claimstester provides for reactivating picturetubes, testing for shorts and leakages,testing hearing aid, magic eye, re-ceiving tubes, etc. Loose-leaf book withindexed tab tube chart cards gives tubedata. New cards with tube test datafor new tubes can instantly be insertedin proper place. General ElectronicEquipment Co., Mantua & Glendale St.,Easton, Pa.-TECHNICIAN (Ask forNo. 10-72)

Atlas P. A. SPEAKERModel CJ -14 Cobra-Jector for pag-

ing, talk -back, intercom, industrial,marine and mobile applications, pro-vides a wide angle of dispersion foreffective coverage of areas of high noiselevel, adverse wind conditions, etc.Fiber glass construction of the mainflare assures lifetime durability underall climatic conditions. Input power: 5watts; input impedance -8 ohms; re-sponse -400 to 9000 cps; dispersion -120' to 60°. Atlas Sound Corp., 145139th St., Brooklyn 18, N.Y.-TECH-NICIAN (Ask for No. 10-73)

Sylvania TUBESTube type 6CS7 is a miniature 9 -pin,

medium mu, dual triode with dissimilarsections, and is suitable for vertical de-flection and oscillator applications us-ing conventional transformer supplyvoltages. Output section has plate dis-sipation rating of 6.5 watts. Othertriode section is for service as an oscil-lator, detector or amplifier. Tube is alsodesigned for series string or conven-tional parallel operation. The 25DN6is a beam power pentode rated for TVservice as a horizontal deflection am-plifier and was designed particularlyfor use in "off -the -line" series stringsets utilizing low B+ voltages. SylvaniaElectric Products, Radio Tube Div., 1740Broadway, New York 19, N. Y.-TECH-NICIAN (Ask for No. 10-74)

Utah AUTO SPEAKERSAutomotive rear deck sound systems

and controls, featuring ease of installa-tion and simple operation, includesthree complete, rear deck auto kits,the "RT" Series, "RQ" Series and the"RF" Series. These kits are availablecomplete with either a 5" x 7" or 6"x 9" speaker, control panel, controlknob, hardware and wire for installa-tion, mounting ring and grill to matchand blend with any car interior. UtahRadio Products Co., Inc., 1123 EastFranklin St., Huntington, Ind.-TECH-NICIAN (Ask for No. 10-75)

FES COUPLER

"Bi-Fi 2 -Set Antenna Coupler" forTV or FM featuring printed circuitbifilar coils, is designed to operate twoTV or FM sets from a single antenna.The Bi-Fi can also be used to operatesimultaneously one TV and one FM setfrom the same antenna. This unit ismounted within a durable, transparentpolystyrene plastic case. Federal Elec-tronics Sales, Federal Electronics Bldg.,Rockville Center, N.Y.-TECHNI-CIAN (Ask for No. 10-76)

Clarostat "PICK -A -SHAFT"Another field -attached "Pick -A -

Shaft" shaft, FKS-1/2, similar toFKS-1/4 or fine knurled slotted shaft,is 1/2" long instead of 1/4". There arenow thirteen types to choose from,plus the high -voltage coupler for pro-tection in operations up to 10 kv.Clarostat Mfg. Co., Inc., Dover, N. H.-TECHNICIAN (Ask for No. 10-77)

34For more technical information, use inquiry coupon on page 60


New Audio ProductsRaytronic TAPE RECORDER -A.

Light weight portable tape recorder,the "Melatone," resembles expensiveluggage. It weighs 14 lbs., 12 oz., andoffers excellent tonal quality. Featuresinclude single one knob control for re-wind, fast forward or playback, withfull stop and pause positions. Speedsare 3% and 7% ips. Side jacks for out-side speaker. Melatone can be operatedwith lid open or closed. Retail price$149.50. Raytronic Laboratories, Inc.,9701 Reading Rd., Cincinnati 15, Ohio-TECHNICIAN (Ask for No. 10-9)

Bell TAPE RECORDERNew portable battery -powered dual

track tape recorder, the Cub -Corder,will record for 1 hr. at 3% ips or 30minutes of recording at 7% ips on asingle 5 -inch 600 -ft. reel of tape. The7% ips speed provides a wide fre-quency response. The machine is alsoavailable with capstans for 17/8 ips and3% ips and using the new long playingtapes at 17/8 ips it will record threehours. Utilizes rechargeable non -spillwet battery. Bell Sound Systems, Inc.,555 Marion Rd., Columbus 7, Ohio-TECHNICIAN (Ask for No. 10-86)

Premier TAPE RECORDERPortable professional -type tape re-

corder, the "Tapesonic" model 70-Boffers these features: three separateheads to provide instantaneous moni-toring from tape while recording; A. B.switch which permits comparison be-

. tween original and recorded program;4% -in VU meter; push button opera-tion-using 7 electrically interlockedD. C. relays and 1 solenoid. It has an8 -in. extended range speaker. $368.50net. Premier Electronic Laboratories,382 Lafayette St., New York 3, N. Y.-TECHNICIAN (Ask for No. 10-85)

Fanon INTERCOMSThe FX-12 or "Manager" unit may

be used either for one master with upto eleven remotes or in an all masterservice with up to 12 masters in ahook up by a flick of a switch. Newcabinet styling. Cabinets rest on grace-ful brass legs. They are of hammertonefinished steel with perforated frontgrilles of contrasting colors to matchany modern or traditional interior.Measurements: 3% in. high x 8 in.long x 4 in. deep. Fanon ElectricCo., Jamaica, N. Y.-TECHNICIAN(Ask for No. 10-84)

Shure CERAMIC CARTRIDGES"Twin -Lever" ceramic phono cart-

ridge can be used to replace 132

3 -speed, plastic -cased, ceramic andcrystal, turnover and single -needlecartridges for high quality 78 rpm andmicrogroove response. Also announcedis a ceramic cartridge (which is fur-nished with a magnetic input adapter)designed to enhance the quality ofpopular hi-fi equipment. The "MusicLovers" cartridge eliminates the prob-lem of induced hum, eliminatescartridge "drag" caused by magneticattraction to steel turntables, has highoutput and relative response is notaffected by load resistance. Needle re-placerr ent requires no tools. ShureBrothers, Inc., 225 W. Huron St., Chi-cago 10, Ill.-TECHNICIAN (Ask forNo. 10-10)

Daystrom TAPE RECORDERThe "Crestwood," Model 404, is a

magnetic tape recorder -preamplifieronly which will record from and play-back through high quality audio ampli-fiers and speaker systems. The 404incorporates the fine features of its pre-decessor, Model 401 and offers a com-

tape transport mechanismwith smooth belt drive and "Non-Vibre motor mounts which results invibrationless, noise -free operatingdrive. Full hi-fi response of 30 to 15,000cycles at 71st ips. Push-pull speedchanger provides instantaneous selec-tion of 7% ips or 3% ips. Completelynew preamplifier holds distortion to lessthan 2%. All tubes are shock mounted.Signal-to-noise ratio 40 db or better.$229.50. Daystrom Electric Corp.,Poughkeepsie, N. Y.-TECHNICIAN(Ask for No. 10-82)

Brociner AMPLIFIERNew Mark 10 Intergrated Audio Am-

plifier includes in one housing a poweramplifier, bass and treble tone controls,selector switch, record compensator andphonograph preamplifier. It is suitablefor use with Ai FM and TV tuners,all types of high -quality phonographpickups, and for tape recording andplayback. A simplified record compen-sator affords convenient selection ofrecord equalization and includes aspecial provision for noisy records; arumble filter controlled from the frontpanel permits the use of recordchangers, without background noise.Frequency response is 20-20,000 cps,within 1 db. Power output is 10 wattsat less than 1% harmonic distortion. 3db. undistorted power 50-20,000 cycles.$75.00 Brociner Electronics Laboratory,344 E. 32 St., New York 16, N. Y.-TECHNICIAN (Ask for No. 10-83)

TECHNICIAN October, 1955For more technical information, use inquiry coupon on page 60

35

New Antenna ProductsJFD FRINGE ANTENNAS

Two new Fireball inline broad -bandantennas, FB500S-68 and FB500S-96,are designed for deep fringe VHF -UHFuse. The FB500S-68 2 -bay model usesthe reverse -phase multiplex dipole sys-tem of the Fireball FB500, is tailoredfor areas with co -channel and cross -channel interference. Stacking harnessincreases back rejection on high chan-nels by 8 db. The FB500S-96 with low -band boost stacking transformers in-creases gain on 2 to 6. JFD Mfg. Co.,Inc., 6101 16th Ave., Brooklyn 4, N. Y.-TECHNICIAN (Ask for No. 10-60)

Channel Master ANTENNAS '*The Lancer and Super Lancer, all -

channel VHF antennas, are said to pro-vide more elements and more powerthan similar types. The Lancer (model333) has 1 added low -band director,gives 11/2 db more low -band gain. TheSuper Lancer (model 334) has 4 addi-tional parasitic elements, it gives 11/2 dbmore gain. The Lancer lists at $18.20(1 -bay) model 333; and $37.50 formodel 333-2, (2 -bay). Super Lancerlists at $32.50 (1 -bay), model 334. Chan-nel Master Corp., Ellenville, N.Y.-TECHNICIAN (Ask for No. 10-61)

Walsco FRINGE ANTENNASThe Wizard is an improvement over

yagi design, using the exclusive PhaseReverser, a specially shaped, shield infront of the receiving element. Unitfunctions as 3 antennas for coverageon high and low channels. No compli-cated harnesses, phasing stubs, and ex-tra dipoles. A 3 -year guarantee goeswith each Wizard model. List prices areas follows: Wizardette $14.90; Wizard$19.50; Wizard Imperial $34.90. Technicaldata available. Walsco Electronics Corp.,3602 Crenshaw Blvd., L. A. 16, Calif.-TECHNICIAN (Ask for No. 10-63)

Thompson ROTATORThe electronic "Automatic Superotor"

eliminates spring or gear mechanismsin the control unit. Only 71/2" wide,41/2" deep, 21/2" high, and including anautomatically illuminated dial, it isreported silent in operation. Featuresinclude synchronized cotitrol and rotorunits; smooth rotation without "jumps";vernier tuning, removable power unit,and a choice of either of two inter-changeable rotator units. ThompsonProducts, Inc., 2196 Clarkwood Rd.,Cleveland 3, Ohio-TECHNICIAN (Askfor No. 10-62)

For more technical information on new products,

B -T MATCHING TRANSFORMERSTwo impedance matching transform-

ers include the MB Balun, an outdoormodel for antennas or amplifiers, andthe TM TV Set Match which mountsdirectly on the receiver. Both provide75 to 300 ohm match over VHF range.The MB features a weather shield andbracket with strap for mast or polemounting, improves directivity of 300 -ohm balanced antennas when connect-ing to 75 ohm cable, increases antennapickup. List price is $8.00. Model TMmounts on back of TV set to match 75ohm input cable to 300 -ohm receiver.List price, $3.25. Blonder -Tongue Lab-oratories, Inc., 526-536 North Ave.,Westfield, N.J.-TECHNICIAN (Ask forNo. 10-65)

J&L MAST TUBINGNew antenna roasting enables a TV

tech to assemble telescoping masts inheights up to 50 ft. Perma-Tube isavailable in 5 sizes, all in 10 ft. lengths.Sections range, in 1/4 -in. gradations,from an outside diameter of 21/4 -in., tothe smallest with an OD of 11/4 -in. The2 -in. size fits inside the 2% -in. size, andso on. Sections have one end expanded,the other reduced. Slots and holes re-ceive hardware fittings. Jones & Laugh-lin Steel Corp., 3 Gateway Center, Pitts-burgh 30, Pa.-TECHNICIAN (Ask forNo. 10-67)

Finco TV ANTENNASGeomatic series for all -channel VHF

includes 2 models for deep fringe use.B-4 provides high gain and sharp di-rectivity; has low -band reflector and1/2 -wave director; hi band has 3-elem.reflector and 2 3-elem. colinear direc-tors. Model B-5 uses multiple directorsand reflectors, other combination ele-ments; is said to provide single -channeltuned yagi performance across all chan-nels. Finney Co., 4612 St. Clair Ave.,Cleveland 3, Ohio-TECHNICIAN (Askfor No. 10-64)

Kay -Townes TV ANTENNAThe Super Rear Guard was designed

to have less than 1 db drop across anyone channel, to facilitate color receptionin fringe areas. The front -to -back ratio,important in eliminating co -channel in-terference, is stated to be better than25 -to -1. Excellent rejection of signalsfrom the sides is also reported for thishighly directive design. Kay -TownesAntenna Co., Rome, Ga.-TECHNI-CIAN (Ask for No. 10-66)

use inquiry card on page 60


'fii

He' wing Pyramid Imps are better!ArThes olded paper tubular capacitors are smallerand better; will operate at kit rated voltage at 100°Cwith less than 2% change in capacitance; will meettest requirements of Government specifications MIL -C -91A;copperweld leads are securely imbedded.These features, plus an almost indestructible thermo-settingplastic encasement make Pyramid Imps your best moldedpaper tubular capacitor.

Lion on Pyramid capacitors andur local distrbutor or write to

DIVISION

MIDELECTRIC CO.1445 Hudson Blvd., North Bergen, N. 1.

Latest Test InstrumentsSimpson CAPACITOR TESTER.-*

In -Circuit Capacitor Leakage Tester,Model 383, shows leakage in capacitorswhile connected in the circuit. It checkscapacitors from 1 mil to 0.25 µf forleakage from a few ohms to hundredsof megohms, and detects breakdownsand intermittents. Checking is done atfull rated working voltage. Capacitorsunder test can be shunted by circuitresistance 1% of leakage resistance. Itchecks coils and detects unstable re-sistors. Price is $79.95. Simpson ElectricCo., 5200 Kinzie St., Chicago 44, Ill.-TECHNICIAN (Ask for No. 10-1)

B S K TUBE TESTERDyna-Quik Model 500, a portable,

low cost, dynamic mutual conductancetube tester, tests for shorts, grid emis-sion, gas content, leakage, dynamicmutual conductance and life expect-ancy for 99% of all tubes in as little as12 seconds per tube. Roll charts andmultiple switching are not required asone switch tests everything. Tube con-dition is shown on a 41/2 in. meter"Good -Bad" scale and directly inmicromhos. B & K Manufacturing Co.,3726 No. Southport Ave., Chicago 13,111.-TECHNICIAN (Ask for No. 10-3)

Triplett DOT GENERATORDot generator, Model 3438, checks

video, r -f, i-f sync and color circuits,with modulated r -f (channels 2 to 6)and i-f (20 to 55 mc) outputs, and syncpulses (15,750 and 60 cycles). Otherfeatures include: Horizontal bars (480to 600 cycles) and vertical bars (189 kc)for checking linearity. White dots areused to check color convergence. Canbe used for signal tracing b/w or colorTV sets. Dealer net is $229.50. TriplettElectrical Instrument Co., Bluffton,Ohio.-TECHNICIAN (Ask for No.10-4)

Hycon COLOR GENERATOR-*Adjusting and trouble shooting color

TV receivers is simplified with Model616 Color Bar/Dot Generator. Everycolor sequence and linearity adjustmentnecessary is available. Color Band "A"is the complete NTSC. Band "B" has 4bars. Band "C" consists of black, I, Q,black. Quadrature signals are heldwithin 1°. For linearity adjustments,black vertical or horizontal bars or ablack crosshatch pattern are available.Price $415. Hycon Mfg. Co., 365 S.Arroyo Pkwy., Pasadena, Calif. --TECHNICIAN (Ask for No. 10-2)

For more technic& information on

Century RC ANALYZERChecking all coupling and most by-

pass condensers without disconnectingthem from the circuit is possible withModel 201 Condenser -Resistor Analy-zer. The unit, completely self-contained,checks condensers from 50 uuf to 150of for leakage (up to 10 megohms) aswell as open, shorted or intermittentoperation. Unknown capacity values arealso quickly registered in one completerange on the clearly calibrated dial.Also, the 201 will test resisters from1500 ohms to 10 megwims for shorted,open or intermittent operation and showup unknown resistance value in onecomplete range. Price is $19.95. CenturyElectronics Co., 111 Roosevelt Ave.,Mineola, L.I., N.Y.-TECHNICIAN(Ask for No. 10-6)

Philco VTVMModel 6100 vacuum tube voltmeter

has six voltmeter ranges which permitac and dc voltage measurements up to1,000 volts. Six resistance ranges giveaccurate readings from 0.5 ohms to1,000 megohms. Ac frequency range ex-tends from 20 to 20,000 cycles. It is alsoavailable with an accessory high volt-age probe, Part No. 425-002, whichpermits measuring dc voltages to 30,000.Model 6100 is in a steel case, weighs51/2 lbs., and its size is 81/2 x 5 11/16 x 4inches. Dealer price is $54.95. PhilcoCorp., Accessory Div., Philadelphia 34,Pa.-TECHNICIAN (Ask for No. 10-5)

Tescon CRT REJUVENATORNew instrument, known as the

Golden Vitalyzer, Model RT-1, willanalyze performance characteristics ofa cathode ray tube, locate and eliminateinter -element shorts, repair open ele-ments, weld upon filaments, rejuvenatethe tube so that it will function satis-factorily for additional time, and willdo all this without removing the tubefrom the set. A neon indicator auto-matically lights up when the rejuvena-tion process is completed. Tescon, Inc.,Springfield Gardens, N.Y.-TECHNI-CIAN (Ask for No. 10-7)

Dunwell TEST SPEAKERNew portable low priced test speaker,

Model A6, equipped with specially de-signed universal test leads, providessimple audio test for any TV, radio re-ceiver or phonograph. Tip jacks connectto 4" PM speaker, universal outputtransformer, 60 ohm field and 90 ohmfield. Weight is 6 lbs. Dunwell Mfg.Co., Carlstadt, N.J.-TECHNICIAN(Ask for No. 10-8)

new products, use inquiry card on page 60


FIELD REPORT NO.6P 2 ;0` 'I i t 0%i # 4 *V` ' 0 00040400.ot .00 0...a.,, a94.4 k. I.0.. 4.-.4.;..... 0

am.44.0111, , .0,4a Oa a.21:61,14 feeds a strong steady signal

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ROSAIRE RUY

MAGOG ORFORD TV

MAGOG, QUE., CANADA

The OW Fireball is one TI"ateenna I don't hesitate toreeommend nn matter bowhopeless the situation. Ithelps get rid of troublesome

ghcsts, at the same time it

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4.. ,>EARL A. BERGEROWEARLS TV ANTENNA SERVICE

HOUMA, LOUISIANA

Ir'e're waited a long time foran antenna like this. My cus-tomers like the sharp pic-tures it gives them. In andaro Ind Houma, Louisiana.we receive clearly with aStar -Helix antenna channel6 front :New Orleans. chan-nel 2 fr Baton Rouge,clusetnel 7 from Lake Charles,an(" channel 10 front La -

(svelte.

MINN

DON ALBERTSON

TELEVISION - APPLIANCE

FERGUS FALLS, MINNESOTA

I like and use theStar -Helix because I

saw Pr myse1f how good onchannels 2-13 it is. I tried 4nf the best broad -band fringe

t". antennas during the last944 year. When 1 compared the

TV picture I got front the)P Star -Helix, you could see the

difference: The Star -Helix brought in the best picture. p

me.:-.%;:-.55.

'liere41

HILLIARD A. THIBODEAUX

BASIN APPLIANCE CO.

CROWLEY, LOUISIANA

After trying several types ofantenna in this area me de-cided On the Star -Helix An-tenna because of its highgain and noise -free picturereception giving us moresatisfied customers.

0.Si

011

B iN CIPOLLA

ARCO TV and RADIO LAB.

BlOOKLYN, NEW YORK

Here in Boro Park ghostsgive us lots of headaches.The OD Fireball is the firstantenna we're tried thatreally helps get rid of them..V-, customers like the clearer kictiire. My crew likes theay they install easier.-..

rt.

1010011111.411.1.-."...11001111111

FOY T. HINSON

RADIO SERVICE

1

KANNAPOLIS, NORTH CAROLINA

Fe have used the Fireballantenna single stacked and

I found it to out -perform an-tnntas costing as much andin some cases much more.The Fireball is one of theeasiest antennas to install.in all a very good antennafor the money.

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First Choice of Servicemen Everywhere!In area after area, alert servicemen are standardizing on JFD antennas. They know that regardless oflocation or budget there is a JFD antenna that does a better, more profitable job. Now is the time to putJFD engineering and promotion leadership to work for you building sales and customer confidence.

JFD STAR -HELIX5X711 single $25.505X7115 stacked $52.50SX711S-96* 96" stacked $55.00

JFD SUPER -STAR HELIX5X13 single $35.005X135 stacked $72.50

"Go Forward with JFD Engineering."MANUFACTURING Co. Inc., BROOKLYN 4, N. Y.

eik...140"- INTERNATIONAL DIVISION, 15 MOORE ST., N. Y.

4'I,.

14"11P

JFD FIRE -BALLF1500 single $17.35F15005 stacked $36.65F15005-68 $68" wide stacked $36.65FB500S.96*96"wide stacked $38.60

for areas with co -channel andcross -channel interference

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411TRIOModel 7 Al rho

CONICAL

$395usl

'4POPULAR MODELS-ALL COMPLETELY

PRE -ASSEMBLED

5 ELEMENT(CHANNEL 6)

Itg115ar LIST

10 ELEMENT(CHANNEL 6)

OSLIST

5 ELEMENTHIGH BAND

$ 95LIST

10 ELEMEIHIGH BAND

116115mar LIST

Ad\

Ingyetiob Mood -216% sowfroreilsteloge s. vlbeetlen 6.4broeheedg. Hip vir elenuonts

thv. lotheil in Ono".

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Quality motrlals plus advanced TRIO automa-tion give you the finest conicals ever built.

(juaht)01,,1,/dc I . IOat /in,/ k

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Auto -Radio Technicians:

DELCO EADI6TRAINING COURSES MEAN MORE BUSINESS FOR YOU

Working in sstructors, altenicians up toat a General

TyacP

groups under factorylecture and lab lied

ate on latest radio and rotors Training Cell

ed Delco in-ep radio tech -

r developmentsco Radio course.

thirty General Motors Training Centersuntry is this one at Tigard, Oregon, a

burb. Ample parking areas help to make thisular throughout the Northwest.

ed`k -Ion urses for experienced service

I, provide latest radio and re-pair t rmation-enable you to do the

ster and more efficiently.

ick, accurate auto radio diagnosis andrepair to factory specifications boosts yourprofits. That's why so many qualified autoradio technicians attend these Delco Radiotraining courses at no cost for tuition, school

supplies, or equipment.

Factory -trained instructors, using latestequipment and instruction methods, conductthese intensified week-long courses, designedto familiarize repairmen with modern autoradio developments and factory -approvedrepair techniques.

The Delco Radio diploma, awarded only tothose who successfully complete the course,is proof that you're equipped to give moreand better service 10 more people-and thatmeans more business.

If you're an auto radio service dealer, comeyourself, or send your technicians. There'sone of 30 GM Training Centers near you.Apply through your local Delco ElectronicParts Distributor or write Delco Radio Divi-sion of General Motors, Kokomo, Indiana.

IDELCO RADIODIVISION O'r GENERAL MOTORS

KOKOMO, INDIANA

HERE'S THE COURSE OF STUDY-(1) C:ircuitry differences between home and auto radios. (2) Dead radio trouble -shooting

procedure and lab. (3) Noisy radio trouble -shooting and lab. (4) Weak radio trouble -shooting and lab. (5) Distorted radio

trouble -shooting and lab. (6) Intermittent trouble -shooting and lab. (7) Push-pull lock -up tuner lecture and lab. (8) Mechanical

operation of Signal Seeking Tuner. (9) Electrical operation and trouble -shooting of Signal Seeking Tuner. (10) Autronic-Eye operation

trouble -shooting procedure and lab. (11) Autronic-Eye installation and adjustment procedure. (12) Transistors and printed circuits.

45TECHNICIAN Octoior, 1955

itfROWNTHE ONLY ALL NEW ANTENNAROTATOR ON THE MARKET

orpfok or-ATER SALES

19R/QED fa? 014-rEgrOnrs

Distinctively new and different, the beautiful Crown Tenn -A -Liner Model CAR6B is shown in combination with the exclusiveCrown TV Planter. The planter, in forest green and chocolatebrown china, is a completely separate unit that opens an en-tirely new field for antenna rotator promotion. Styled forfeminine buy -appeal, the Tenn -A -Liner has sleek modern lines. . . handsome three -tone color styling . . . and harmonizeswith dark or blonde woods, modern or traditional furnishings.

And remember, Crown gives you the highest profits in theTV antenna rotator field. Don't miss your chance to cash in !SELL WITH CONFIDENCE . . . SELL CROWN !

FEATURES THAT MAKE CROWN THEMOST DEPENDABLE, EASIEST TOSELL ROTATOR ON THE MARKET

Modern styling

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Only 1.06% of units sold require service

Canadian Sub.idiary Cn.wn Controls Mfg. Ltd. Exp,rt Uisi.ion, 11 'Alm., St. NI, VIPt Cable --'11isilho rue.'

You and the

LAWFLOYD WILKINS, JR.

MEMBER, NEW YORK BAR

(Continued from September)

What can you do where you askthe infant's age only to find laterthat he either misled you by beingsilent or he actually lied, saying thathe was over 21 and later disaffirms?If you are in Florida, Georgia, Illi-nois, Indiana, Kentucky, Louisiana,Minnesota, Mississippi, Missouri,Montana, Nebraska, Nevada, NewJersey, Oklahoma, South Carolina,Tennessee, Texas, Virginia, WestVirginia or Wisconsin, the courtswill not permit the infant to denyhis prior statements and actions in-dicating he was an adult. Thus, theinfant, having caused you to rely onhis representations of his age, isforced to act as if he is the adult hesaid he was. Five states-Iowa, Kan-sas, Michigan, Utah and Washington-recognize this same rule bystatute. Therefore, in all of thesestates, if you think you are dealingwith an infant, ask him his age.Have him answer either in writingor with a third person present. Youshould then be able to treat him asthe adult he claims to be.

Partial Redress

Ten states have adopted an ap-proach that permits the misrepre-senting infant to back out of his con-tract, but they give you the right toactual damages suffered as a resultof the minor's misrepresentations.This does not mean that you willbe able to enforce the contract. Infact, if the misrepresentations arepart of the contract, you will lose.Therefore, be sure to ask the infant'sage before you agree on the workto be done or the articles to be sold.States following this rule are Arkan-sas, Connecticut, Illinois, Indiana,Iowa, Louisiana, New Hampshire,Tennessee, Vermont and Wisconsin.

Be careful in Maryland, Massa-chusetts, New York, North Carolinaand Pennsylvania, because neitherrule about misrepresented age willapply. The only thing you can do isto deal with a parent or guardianwho is responsible directly to youfor the work or sale. Be sure thatthis person is not the agent of theinfant, for if he is an agent, the in-fant still may disaffirm.

In some states you will be helpedby statute, if the appropriate legis-


lation has been complied with. Forexample, in Alabama, Arkansas,Florida, Kansas, Louisiana, Missis-sippi, Oklahoma, Tennessee, Texasand Wyoming the infant may applyto the local court to have removedthe right to disaffirm. Thereafter, theinfant is treated in all respects as anadult, thereby eliminating the prob-lems raised by the general rule dis-cussed above. However, only infantswho have gone through this statu-tory process are to be treated asadults; others are still potentialsources of troubles.

In Florida, Iowa, Kansas, Louisi-ana, and Utah an infant automati-cally becomes an adult when he orshe marries. However, in Alaska andNebraska only the wife becomes anadult upon marriage. Hence, in ourexample concerning the couple, youcould deal with her safely but notwith the husband.

"Business" Contracts

The problem of an infant's dis-affirming his contracts is particularlyserious in business, because logicallywe believe that a person in businessis mature enough to realize and tobe held to the consequences of hisenterprise. However, the thinkingbehind the disaffirmance rule is thatuntil one becomes 21 he must beprotected from his own folly as wellas from the trickery of adults. It isclear that one in business should nothave the right to back out ofcontracts as an infant can. Conse-quently, several states-Iowa, Kan-sas, New York, Utah and Washing-ton-provide that the infant cannotwiggle out of reasonable contractsmade in his business. These statutesare helpful, but they have not pre-vented law suits because the prob-lems remain whether the contract isreasonable and is a business con-tract. Moreover, these laws do nothelp you in the case of the couple.

Do not rely solely on the fact thatthe person with whom you are deal-ing is a veteran. Although the prob-lem lessens with the passing of time,its seriousness is shown by the factthat Congress and most states had topass special laws protecting lendersagainst the power of disaffirmance.Insurance companies also have beenprotected by special laws in somestates. But these laws do not protectyou. Moreover, many of the statutesmentioned are restricted to minorswho are 18 or over. As a practicalmatter the 18 to 21 group is the mosttroublesome, but there are cases in-volving infants of 16.

Here is what you should do as ageneral rule:


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NEW TEK-FILE RELEASES:I PACKS 102 TO 155 AVAILABLE NOW!L48

(Continued from page 47)1. Deal only with an adult, if at

all practicable, preferably the parentor guardian.

2. Be sure that the adult is not theinfant's agent. In this connectionmake clear to the adult that you lookonly to him for payment.

3. If it is necessary to deal with asuspected infant in order not to losethe job or sale, and he says he isover 21, have the infant state his agein writing before you reach anagreement as to terms of your con-tract.

4. If you know you are dealingwith an infant, realize that you arerunning the risk of disaffirmance. Atthis point your protection is prac-tical: Either don't deal with him orreduce your risk by learning thatthis infant lives up to his obligations,as many of them do.

"Long -Play" Portable UsesTransistors, 2 Speakers

Latest version of Raytheon's all-transistor portable radio has beendesigned to work from a small "A"pack battery for 2500 hours. This isestimated to be about 2 years normaluse. If the owner desires, however,the set may alternately be operatedfrom 4 standard flashlight cells, aswas the earlier model, for somethingless than half a year of normal use.

In addition, the "Super T" fea-tures 2 matched 5 -in. speakers forimproved fidelity. Earlier versionshad already incorporated a pair ofpush-pull transistors in the audiooutput, together with negative feed-back, for improved sound quality.

While the "Super T" is larger thanits predecessor, it is only 1 ft. long inits maximum dimension, and weightof the complete receiver is a light 8lbs.

IN

"Why you only lust replaced that oneten -twelve months ago!"


more profit for you in"Silver Screen 85's"

Sylvania puts you in the driver's seat and backs you with morepromotional horsepower than ever before. This Fall, it's all outon all fronts to make ycur selling job easier and your servicing

job more profitable. Here's how:

Stepped -up TV power-"Beat the Clock's" fabulousprize contest makes all your customers and prospects potentialprize winners. 10 new prizes,Week after week you'll win new customers who come to youfor their free entry blank. And as a Sylvania Dealer only youccn supply them with an official entry blank.

Stepped -up magazine power - Sylvania's selling the

"Silver Screen 85" in the biggest consumer magazine cam-paign of 1955. Full schedules in This Week and TV Guide willpresell your customers on the three outstanding features of the"Silver Screen 85" picture tubes. 11 million readers arereached by This Wee( through the combined distribution of35 great American newspapers. Over 3 million TV viewersuse TV Guide every week for TV news and program listings.

Stepped -up promotional power for you. A completepackage of Sy.vania promotion material is available so youcan fill in the mportant final link in this promotional chainreaction. Window anc counter displays, new direct -mail ma-terial, the important "Silver Screen 85" booklet, and new admats are included to help you capitalize on the prize contestand national magazire program.Stepped -up profits for you. Sylvania supplies sellingpower that adds up to more profit for you. Think with

Sylvania-work with Sylvania-promote with Sylvania-end you can't help but profit with Sylvania.

SYLVANIA ELECTRIC PRODUCTS INC.1740 Broadway, New York 19, N. Y.

In Canada: Sylvania Electric (Canada) Ltd.University Tower Bldg., Montreal

LIGHTIN3 RADIO ELECTRONICSTELEVISION ATOMIC ENERGY

SYLVANIA... fastest growing name in sight


Source

Rx for Ailing Hi-Fi Gearof Trouble Is Often Outside the Electronic System

JAMES GRAFTON

While the heart of any high-fidelity reproducing system is elec-tronic, and generally familiar to thetechnician, many components includemechanical systems. Particularly inrecord changers and tape recorders,performance defects may be tracedto these systems, or to the playing

medium itself (tape or record).Many defects in these categories canbe traced to relatively simple causes:

Record ChangersRumble: This is mechanical vibra-

tion of very low frequency trans-mitted from the motor to the pickup.Most changer motors operate at 1800rpm (or 30 cps). For this reason,rumble is not likely to be heard on

EVERY

SERVICEMAN

NEEDS MISPOLT4 GE

49105TOR

T -8394M MANUAL VOLTAGE ADJUSTOR

Where low voltage is affecting the service man con detect the condition atonce with a T -8394M Acme Electric Voltage Adjustor. And by a simple demonstration hecan sell a Voltage Adjustor to the TV set owner. Sales are easy to make because demon-stration while servicing a set quickly convinces its owner that the voltage regulation isessential to good TV reception.

How To Use The T -8394M VOLTAGE ADJUSTOR on Service CallsWith the tap switch set at 115 volts, the meter reading will show incoming line voltage.Thus it can be instantly determined if line voltage is lower than normal required forgood TV set performance.The T -8394M Voltage Adjustor can also be used to reproduce the operating conditionabout which the customer complains by turning tap switch to the voltage which simulatessuch condition. For example, customer complains that evening program pictures flickerand shrink. When service man calls next day all operation appears normal - voltagetests out properly. But, by adjusting voltage to 97 volts the condition about which thecomplaint was made is reproduced. This indicates low voltage condition during eveningthat can be corrected with a T -8394M Voltage Adjustor.

Not A Gadget -A High Quality Unit You'll Be Proud To UseThe T -8394M Voltage Adjustor can be installed instantly, no tools needed. Justplug into most convenient outlet. Then plug television cord into secondary receptacleon Voltage Adjustor.

FOR COMPLETELY AUTOMATICVOLTAGE CONTROL

Regardless of line voltage supply, the AutomaticVoltrol corrects voltage fluctuation over a rangefrom 95 to 130 volts. The voltmeter suppliedindicates secondary voltage while unit is inoperation. A built-in relay automatically discon-nects circuit when set is turned off.

ACME ELECTRIC CORPORATIONMAIN PLANT: 8810 WATER STREET CUBA, N. Y.

West Coast Engineering Laboratories:1375 West Jefferson Boulevard. Los Angeles, California

In Canada. Acme Electric Corp. Ltd.50 North Lin Rood Toronto, Ontario

systems that do not have excellentbass response; nevertheless, its pres-ence can contribute distortion totones higher in frequency. A fre-quent cause is improper floating ofthe changer on its spring or cushionmounts. Make sure that shippingscrews, which fasten changer tightagainst vibration -isolating mounts,are loosened or removed. In doingso, make sure level mounting ofturntable is maintained.

Loose drive wheel bearings and abent turntable are other sources ofthis trouble. If some rumble persistsafter all remedial steps have beentaken, a soft -rubber mat on theturntable usually helps to provideadditional rumble absorption.

Wow: Variations in turntablespeed causing pitch changes are usu-ally due to slippage or binding inthe drive system. Check for frictionagainst turntable, worn or eccentricidler, missing washer on centralbearing. Oil on the drive or idlerwheel may also cause slippage.

Jamming: The changer stops orsticks while trying to complete achange cycle; that is, go from theend of one record to the beginningof another. Shut off motor power andslowly rotate turntable by handwhile observing the actuating mech-anism under the baseboard. Checkfor insufficient lubrication, dirt inthe actuating mechanism or exces-sively low line voltage.

Tracking: Skipping or repeating ofgrooves can be caused by inadequatetone -arm pressure, a non -level turn-table, binding in the arm mount orextreme turntable vibration. If itoccurs only on certain records, checkthe discs for warping or other de-fects. Skipping of the first fewgrooves at the beginning of a recordmay be caused by improper settingof the indexing or set -down adjust-ment for the arm.

Tape Recorders

Wow & Flutter: Pitch changes re-sult from defects in the drive system.Check for wear, eccentricity or oili-ness of idler wheels, pressure roller,or drive belt; also for bent tape reelsand improper tension adjustments.

Poor High -Frequency Response:Muddiness, muffled sound, lack ofsharpness can result from accumu-lated dirt in record or playbackheads, particularly in the head gaps.Head misalignment is also a frequentcause.

Noise & Distortion: Causes includeinsufficient bias current, incompleteerasure of previous recording ontape and electronic defects. Improperrecording level is a common culprit.



=MO

Fr

INTERCHANGEABLEROTORSFamous time -proved Superotormodels -100- and "50C- haveboth been adopted for automaticoperation I

OTHER THOMPSON PRODUCTSELECTRONIC AFFILIATES

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Lists ALL Popular TV & Radio Types. Makes Mail -Order a PleasureAll Tube Orders Over $25.00 (with full remittance) Postpaid in U. S. A. Overnigh

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Ink UnitType Mu- - Ink Unit

Type Mee- - Ink UnitType Pries- - Ink Unit

Type Pries- - Ink linkType Prins- - Ink Unit

Type Price

1466 850A2 85 354 80 6AS76 .3.75 616GA .1.30 7117 95OB2 5 3Y4 85 6ASEI 1 20 616M 150 77 1 00 14C7 1 000B3/5R-90 .85 6AT6 55 617 1 15 7117 130 14E6 1200C3/VR-105 .90 4807A ....1.30 6AT8 1 10 6117 1 15 757 130 14E7 1 30003/58-150 .90 4827 1 35 6AU4GT .1.00 6Q7 95 7W7 130 14F7 1 00014 50 5A118 1 05 6AU5GT .1.10 6S4 65 7X7 100 14F8 1 30024G 65 5AN8 1 10 6AU6 60 65851 .1.10 714 70 14117 1 001A5GT .... .80 5A 75 6AU7 90 6SA7GT .65 7Z4 70 14117 1 001A76T ....1.00 5ASS 110 6A556T .1.20 6SC7 75 1407 951AD4 125 5AT8 1 10 6AU6 55 6SF5 75 12A4 85 1487 1 301AE4 100lAG4 125

5A511 1155AW4 ..1.13

6AX4GT .856AX5GT .75

6SF7 906867 75

12AL5 .7012AQ.5

1457 12514W7 ....1.351AX

18352 T ....1 9900111351 ... 751L4 851L6 11011A4 1001LA6 1001184 1 001LC5 1001LC6 1001185 1001LE3 1001165 100

5AZ4 605165R46Y ....1 5590514 1 755U46 605U4G11 705U8 1105546 55V66T 7905W46T 705X4G 805X8 1 05553GT 43

6845 1 256BA6 6568A7 906BC4 6068C5

170

6SC7 125611115 1 406806 756BE6 70611F5 856BF6 7068666 1 8068116 80

6SH7 806S17M .... 706SK7GT .. 656SL7GT .. . 806SN7GTA/11 806511757 ... 606SR7

7 806SS7 56ST7 1 156T8 1 056U 906U85 100

1653A 30

12AT612AT712AU612A U712A56 . .

12AV712AW6 ...1.0012AXGT .. .9012*57 .... .8012AY7 ....1.7512AZ7 ... .901211411 ..... .8512BA6 .... .65

1911666 ...2.0019T8 1 2025A556T ..1.3025AX4GT ..1.1025810 ..1.0025806618 .1.352.5CD6GA ..1.7525CU6 ....1.35251651 ... .6525W46T .. 752525 70252651 65

11114 1 00 5146 65 6816 70 656GT . .65 12BA7 .95 35A5 7011115 100 523 68145 90 6561A .1.30 12606 .75 3585 701N5GT .... .90 524 1 2580 6BK7A .1.10 6W451 .60 128E6 35C5 701Q56T ....1.15 6BL76T ...1.15 6W66T ... .30 12BF6 ..... .6570 351661 65184 100 6A7 100 6BN6 1 15 6X4 50 1211117A .95 35W4 45IRS 85 6A8111 ....1.00 611066TA .1.20 6X5GT . .50 128 K5 1.00 3554 70184 90 6A86T ....1.00 6811711 .1.20 6X8 95 12806011 .1.40 3525 45133 70 6A 65 68X76T .1.25 6566 95 12BY7A .95 41 75114 80 6A17 1 35 68155 .1.30 12BZ7 1.00 42 751 T5GT ....1.05 6AC5GT -1.15 1 25 7A4 80 12C U6 ....1.40 43 80751U5

6AC7 1 10 6C4 50 7A5 95 12156T ... .70 50A5 7070 6AD76 .1.45 665 60 7A6 Bo 12K76T ... .90 5085 7015 95 6AF4 1 30 6C85 450 7A7 60 121(8 1 10 5005 70152 70 6AF66 .1.20 6CB6 70 7A8 80 12076T ... .80 501661 .651X2B 90 6AG5 75 6CD66 .1.75 7AD7 1 75 12SA76T .. .65 50X6GT .902A 1 302A

3F4A ....1.40

6 106AAG7 /MGT

185

6AH6V ....1 00

6CF6 906CG76CL6 1 15

77AG7AF7

10095

7AH 001

12SC7 . . . . .8012SG7 .... .9012SH7 .... .93

505667 .80505767 ... .80701751 .. .1.552021 1 00

2X2 .306A15 1756AK5 75

6C116 856CS6 70

7AU77 90784 80

12517 . . .7012SK76T .. .65

80 6581 190

3A3 1103A4 553A5 75

6AK6 806AL5 606A6AM4

L7GT .1..1.5540

6CU6 1 406006 956E5 806F5 85

785 70786 75787 807118 90

1251767 1.001291767A . .8012130757 .. .601256GT ... .75

83 100835 1 00117176T ..2.501171170

3A3AL565

U6 703AV6

$03110538116 1053856 75

6AM .1.156AN48 1 06A1I56A118

31

5020

GAO 7061146 60

6F6M .1.006F65 806116 30614 3 95615 50616 75

755 SO7C6 707C7 857E7 1207 F7 907F8 120

12W6GT .. .9014A4 1 0014A5 1 5014A7 8514AF7 ....1 00

_1.95117P7GT ..1.9511723 .... .701172467 ..1.151172661 ..1.005642 1 00

3C86 803CF

I8 25403LF6

6A11787 .1.206415

225 76AR6 5

6.17 956K651

so60

6K7

767 1 157117 75717 1 35

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News of the Industry

DONALD R. WEISENSTEIN hasbeen appointed manager, sales adminis-tration, RCA TUBE DIVISION.

ROBERT W. FELBER has joined thesales organization of the AMERICANPHENOLIC CORP.

AUTOMATIC MANUFACTURINGCORP., subsidiary of GENERAL IN-STRUMENT CORP., announces the de-velopment of small light silicon powerrectifiers which will operate undershock and temperature stresses for in-dustrial and military use.

FRITZ A. GROSS, authority on radarand related electronics devices, hasbeen appointed manager of RAYTHEONMFG. CO.'s equipment engineering div.

J. II. CRAFT, JR., of STROMBERG-CARLSON has been appointed chair-man of the Service Committee of theRadio - Electronics - Television Mfrs.Assn. for 1955-56. ALBERT J. FOR-MAN, Editor of TECHNICIAN, has beenreappointed a member of this commit-tee.

SAMUEL W. ARCHER has beennamed assistant general merchandisingmanager for UNITED MOTORS SERV-ICE DIV. of GENERAL MOTORSCORP.

FAIRCHILD RECORDING EQUIP-MENT CO. announces the appointmentsof RUBEN E. CARLSON as managerof high fidelity division, and ROBERTG. BACH as manager of promotion anddistribution.

DOUGLAS C. LYNCH, president ofBRUSH ELECTRONICS CO., has an-nounced the appointments of two vicepresidents. . . . JOHN H. HARRIS asvice president and general works man-ager and DR. DAVID B. PARKINSONas vice president and general engineer-ing manager.

WESTON ELECTRICAL INSTRU-MENT CORP., a subsidiary of DAY-STROM, INC., has announced the ap-pointment of WILBERT H. STEIN-KAMP as vice president of sales.

ARTHUR A. CURRIE has beennamed vice president and general man-ager of ADAMS DISTRIBUTORS CO.,INC., Boston and Providence, R. I.

ELECTRICAL SUPPLY CORP. hasmoved from its former location to largerquarters at 205 Alewife Brook Pkwy.,Cambridge, Mass.

TECHNICAL APPLIANCE CORP.Sherburne, N. Y., has awarded scholar-ships to four Central New York highschool students.


HEART OF AMERICA CHAPTER,Reps of Electronic Products Mfrs., Inc.,awarded a two -door Plymouth Subur-ban as attendance prize at its conferenceat Rockaway Beach, Mo., Sept. 15.

CBS -COLUMBIA has announced theappointment of KING DISTRIBUTORS,Kearney, Neb., as distributors in west-ern Nebraska. . . . CBS-HYTRON fol-lowed the appointment of RUCKERELECTRONIC PRODUCTS CO., INC.,Washington, D. C., distributor, with adinner -sales meeting for the Ruckerstaff and a week-long open house forservice -dealers in the area.

JACOB H. RUITER has been ap-pointed manager of advertising and pro-motion of the Technical Products Div.of the ALLEN B. Du MONT LABO-RATORIES, INC.

FRANKLIN GREENE, JR., has beenappointed mgr., television mfg., Radioand Television Dept., GENERAL ELEC-TRIC, Syracuse, N. Y. WILLIAM N.MADDOX has been appointed mgr.,radio mfg.

NORMAN L. HARVEY has been ap-pointed chief engineer of the Radio andTV Div. of SYLVANIA ELECTRICPRODUCTS INC., Buffalo, N. Y.

JOHN BENTIA was elected presidentand general manager of ALLIANCEMFG. CO., Alliance, Ohio, by the officersof Consolidated Electronics IndustriesCorp., new owners of the company.Other elected officers are ARIESVERNES, vice president; R. D. DETT-MER, secretary; ROBERT DUNN,treasurer, R. E. BARRICK, assistanttreasurer.

WILLIAM J. SHEA, chairman of theboard of CHICAGO STANDARDTRANSFORMER CORP., will assumethe office of president during the ab-sence, due to ill health, of LARRY S.RACINE. Subsequent appointments in-clude RAY GISLASON, vice-presidentin charge of manufacturing plants; P.NEWTON COOK, general sales man-ager; R. J. REIGEL, sales manager ofthe Chicago and Stancor Catalog divi-sions.

MARTY WOLF has been appointedadvertising and sales promotion mgr.of the B & K MFG. CO., Chicago, Ill.

ROY G. TRUE has been named ex-ecutive vice-president of I.D.E.A., INC.

G. LEONARD WERNER has been ap-pointed Director of Sales and JOHN P.YOHE Director of Purchases of theASTATIC CORP., Conneaut, Ohio.

MICHAEL P. FUMAROLA has beenappointed Publicity Director for alldivisions of JFD Mfg. Co., according toJulius Finkel, President.

HOLLOWAY ELECTRONICS CORP.,Ft. Lauderdale, Fla., is going into pro-duction of their line of all -channel ex-ponential antennas.

Avoid makeshifts...use function -fitted

aCitors

FERMIN111-4:X

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Ceramic capacitors serve in the morecritical applications. That's why theAerovox Hi Q line is outstandingly complete.You get that function -fitted number everytime. Which means you don't waste time,effort and money, improvising with theusual limited selections.

There are General Purpose (includingBy -Pass and Coupling) and Temperature -Compensating Ceramics. Aerovox furnishesboth categories in Tubular and Disctypes. Also many special-purpose types-Stand -Offs, Feed-Thrus, High -VoltageCartwheels and Plate Assemblies.

Avoid makeshifts! Use function -fittedAerovox Hi -Q Ceramic Capacitors. Stockedby your Aerovox distributor foryour convenience.

Latest Aerovox Catalog containsthe outstanding selection of ceramiccapacitors. Available free of chargeonly from your Aerovox distributor.

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rn Check the outstanding engineering design of%al this modern printed circuit Scope. Designedfor color TV work, ideal for critical Laboratory ap-plications., Frequency response essentially flat from5 cycles to 5 Mc down only 11/2 db at 3.58 Mc ( TVcolor burst sync frequency). Down only 5 db at 5Mc. New sweep generator 20-500,000 cycles, 5times the range usually offered. Will sync wave formdisplay up to 5 Mc and better. Printed circuit boardsstabilize performance specifications and cut assemblytime in half. Formerly available only in costly Labtype Scope. Features horizontal trace expansion forobservation of pulse detail - retrace blanking am-plifier - voltage regulated power supply - 3 stepfrequency compensated vertical input - low ca-pacity nylon bushings on panel terminals - plus ahost of other fine features. Combines peak perform-ance and fine engineering features with low kit cost!

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WRITE FOR FREE CATALOG...COMPLETE INFORMATION

KEEP GROWING with

CLAREMONTTUBECORP.

Now Claremont offers you an opportunity to grow, too. Become aClaremont Tube distributor. Sell the finest replacement TV picture tube made.

More than 30,000,000 television receivers are now in use. It is estimatedthat one-fourth will need a new picture tube every year-for a repeat,regular demand of 7-8,000,000 replacement CRT's annually.

New Claremont distributors are being appointed. Learn how you can be-come a Claremont dealer in your territory. Write for more information NOW.

CLAREMONT TUBE CORP.36-04 35th Ave., Long Island City, N. Y.

Reps and Distributors

LARRY H. KLINE has been ap-pointed manager of commercial productsales for the Electronics Div. ofTHOMPSON PRODUCTS, INC., Cleve-land, Ohio.

MERIT COIL & TRANSFORMERCORP., Chicago, Ill., has announced theappointment of ART CERF & CO.,Newark, N. J., as rep for the upper NewYork area.

CLADCO DISTRIBUTORS, INC.,Buffalo, N. Y., has been named distribu-tor in the Buffalo area for SYLVANIAELECTRIC PRODUCTS INC.

RAM ELECTRONICS SALES CO.,Irvington -on -Hudson, N. Y., has an-nounced the appointment of the PAULF. WILEY CO., Los Angeles, Calif., asSouthern Calif. and Ariz. rep.

ILLINOIS CONDENSER CO., Chi-cago, Ill., announces the appointmentsof MITCHELL AND MORRIS, Indian-apolis, Ind., as sales rep for Ind., Ky.,and Cincinnati; M. K. WIDDEKINDCO., Seattle, Wash., for Ore., Wash.,Mont. and Ida.; PAUL HAYDEN &ASSOC., East Point, Ga., the Southeast.LANGHOUSE AND LEVY, Chicago,Ill., for Wis. and Ill.; F. W. MOUL-THROP, San Francisco, Calif., forNorthern Calif.; STAN BLAKER,Northfield, Ill., for Mich., Wis. and Ill.

PYRAMID ELECTRIC CO., NorthBergen, N. J., has announced the ap-pointment of WILLIAM MEILY, Ft.Wayne, Ind., as industrial rep for Ind.,Ky. and Mich.

HICKOK ELECTRICAL INSTRU-MENT CO., Cleveland, Ohio, has beenappointed exclusive American dis-tributor for DAWE INSTRUMENTS,LTD., London, Eng.

JENSEN MANUFACTURING .CO.,Chicago, Ill., announces the appointmentof HYGRADE RADIO LTD., Vancouver,British Columbia, Canada, BROOKEDISTRIBUTORS, Miami, Fla., andHYLAND ELECTRICAL SUPPLY CO.,Chicago, Ill., as wholesale distributors.Also appointed were R & R ELEC-TRONIC CO., Abilene, Texas, GOD-DARD-GAINSVILLE, INC., Gainesville,Fla., WARREN RADIO CO., Indian-apolis, Ind., LAFAYETTE RADIO SUP-PLY CO., Lafayette, Ind., OMAHA AP-PLIANCE CO., Omaha, Neb., RADIOPARTS CO., Milwaukee, Wis.,KIERULFF & CO., San Bernadino,Calif., THUROW DISTRIBUTORS,INC., Fla., and GIFFORD-BROWN,INC., Ia.

INSULINE CORP. OF AMERICA,Manchester, N. H., has announced theappointment of FARBER-JACKSON,Buffalo, N. Y., as rep for parts distribu-tors in upper New York.


MARK W. CRESAP, JR., has beenelected to serve as executive vice-president and deputy chief executiveofficer of the WESTINGHOUSE ELEC-TRIC CORP. . . . GWILYM A. PRICE,president of Westinghouse since Jan-uary, 1946, was elected chairman andpresident, and will continue as chiefexecutive officer. . . . WILLIAM H.EUTZY has been named sales adminis-tration manager and GORDON L.JOLLY has been promoted to the posi-tion of manager of Product Informationof WESTINGHOUSE TV -RADIO DIV.... LOUIS MARTIN has been appointedgeneral sales manager of WESTING-HOUSE ELECTRONIC TUBE DIV.

RUSSELL D. GAWNE has beennamed sales manager of G -C ELEC-TRONICS MFG. CO., a new div. ofGENERAL CEMENT MFG. CO., Rock-ford, Ill.

PYRAMID ELECTRIC CO., NorthBergen, N. J., has announced the ap-pointment of two new jobber reps:KENNETH REINHARDT, Indianapolis,Ind., for Ind. and Ky., and TRI-ONICSALES CO., Detroit, for Michigan.

(News Continued on page 58)

Association News

NATESA ConventionA survey after the Chicago con-

vention of the National Alliance ofTelevision & Electronic Service As-sociations, 5908 S. Troy St., Chicago29, Ill., reveals that a total of 1580persons registered from 44 states,Canada, the Hawaiian Islands, thePhilippines and Cuba. A total of 3375separate visits to exhibitors boothswere tallied. Delegates from 38 affili-ates met in official session, drew upan organizational plan for setting updistrict governors, state chairmen,and other units down to the townlevel.

A TV -Radio Service Week orMonth was planned and proposed tothe Radio - Electronic - TelevisionManufacturers Association. NewNATESA awards to Friends ofService included an award to TECH-NICIAN & Circuit Digests.

St. Paul License LawNATESA Delegate Joe Driscoll,

on behalf of the Radio -TelevisionService Association of St. Paul, Inc.,sends us a copy of the recentlypassed licensing ordinance now ineffect in that city. Passage of the billis the result of co-ordinated effortby the association, the local Cham-ber of Commerce, newspapers andcity officials.

For a master's license, needed tooperate a shop, the applicant mustpay $30.00 annually, have a business

address that does not violate zoningregulations, and maintain a mini-mum complement of equipment in-cluding tube checker, multimeter,scope and signal generator. Threedollars additional must be paid an-nually for each service technicianemployed by the licensed shop. Vio-lation of the ordinance, a misde-meanor, is punishable by fines up to$100 or imprisonment up to 90 days.

CETA & Color TrainingEdward D. Tilin, President of the

National Executive Board of theCertified Electronic Technicians As-sociation, 755 Ocean Avenue, Brook-

lyn 26, N. Y., has sent out a call toall RETMA-accredited techniciansto apply for a Color Training Course.The program has been formulatedcooperatively by CETA, the NewYork Trade School, and the GeneralElectric Company. Registration feeis $5.00. The course will be in theform of 10 sessions, on alternate Fri-days, between 7 and 10 p.m.

WAh the expansion of the RETMAtraining and accreditation programto other parts of the country, CETAis now preparing to charter regionalchapters whose membership, as isthe case with the present unit, willbe based on RETMA accreditation.

WINEGARD

Pixied MEAN

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TODAY'S TOP ANTENNAVALUE . . . BY FAR!3 great WINEGARD PIXIE models.Pixie POWERHOUSE (Illustrated)perfect for weak signal areas. PixiePRINCESS designed for normal fringeareas and Pixie PAL for close -in sub-urbanite:.

NEW TWIN -LOCK HARDWAREwith STAINLESS STEEL SNAPS

Here it is! The finest,lightest and yet strong-est hardware you'll findon any TV antenna, re-gardless of price. Nonuts or bolts b tighten-elements simply lockin place automatically.

Originals byWINEGARDList pr ces: POWER.HOUSE (LP -5) $19.95;PRINCESS IL -5) $13.65;PAL (P-5) $8.85.

Special PIXIE PROMO-TION PROGRAM untilJan. I. FREE PIXIEBUCKS.

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FABULOUS NEW DICONELEMENT! Another WINEGARDOriginal! A composite of the bestfeatures of both the conical andfolded dipole in one simple element!The Dicon is one element mechanically. . three elements electrically!

ULTRA -SENSITIVE ELECTRO-LENS FOCUSING* Both PixiePOWERHOUSE and PRINCESS anten-nas have exclusive Winegard Electro-Len. Focusing! It absorbs the fullsignal, intensifies it and focuses it onthe driven element for brilliant, clear -as -I fe pictures.

'Patent No. 2700105

MI IN SES -t! =I ME - EN MR

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Of Dicon ElementPleas, Seed Infoarnation On How I Can Get Pixie lucks

FIRM NAME

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KESTER

KESTER SOLDER COMPANY4264 Wrightwood Avenue Chicago 39, Illinois

Newark 5, New Jersey Brantford, Canadasoy

Absolutely non -corrosive andnon-conductive, KESTER"RESIN -FIVE" CORE SOLDERcontains an activated type ofresin that gives you that fast,positive action on all yourjobs . .. including the mostdifficult.

ERit's here!!DYNA-BEAMER

CRT. REACTIVATOR

1595Prepaid

Now you can own an entirely new picture tubereactivator at a price that any TV service shop canafford. The "Dyna-Beamer" reactivates picture tubesby the cathode sweep action principle . . . uses theTV set as a source of power and indicator. Can becarried in the tube caddy. Ten day money backguarantee if not 100% satisfied. Save money byordering now direct from manufacturer.

Dept. T-10

TAMPAVIDEO SERVICE6105 INTERBAY BLVD.

TAMPA, FLORIDA

Rx for Ailing Hi-fi

(Continued from page 50)

Loss of Tape Quality: Deteriora-tion of sound quality on recordedtape, including the gradual introduc-tion of pre -echo or post -echo ef-fects, results from improper tapewinding or storage. Tightly or un-evenly wound tape, especially afterperiods of storage, will show sucheffects. To retain tape quality, pro-fessionals don't rewind after theyfinish playing a reel of tape; insteadthey store it as wound on the take-up reel. The tape is rewound justbefore replay only, then again storedon the take-up reel after replay. Fastrewind is never as uniform as theslow, controlled wind during play.

DON'T DO IT YOURSELF!

Thrown into shock by the "do-it-yourself"craze, the domestic fixer caricatured above isthe target of a Westinghouse tube divisioncampaign. The cartoon is one of seven in amailing piece planned for national distribu-tion. The promotion will also highlight thereliability of trained technicians. Betty Furnesswill spearhead the campaign in "Studio One"TV commercials beginning Oct. 10.

IMPORTANT NOTICETO READERS

Changes of address require four weeks'notice. Notify your Postmaster and

TECHNICIAN Circulation Department atthe earliest possible moment.

When ordering change, please INCLUDE

IMPRINTED WRAPPER showing exactly

how magazine is now addressed. Thiswill enable us to put the change intoeffect with a minimum of delay.


Igo guesswork w'

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COMPARE THESE FEATURESTests - Repairs TV Picture Tubes With-out Removing Tube From Set

Compact, light -weight and easy to use. Compete Tester: detects open or shorted ele-

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DEALERS! Now you cansell those "dim-out" trade-ins at a good profit, andback them up!SERVICEMEN! Sell rejuve-nation service. Fully 80°.to 90°. of picture tubesthat have gone dim in serv-ice can be quickly reacti-vated to furnish up to yearsof "bright as new" service!

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THE RAYTRONIC JUNIORFIELD PORTABLE

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LABORATORIES, INC.

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Your TRIAD parts

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TRIADD60Zenith'CorrectReplacement

0.54 List Price $6.50 'Correct Replacement forRCA 77833.

0-57 List Price $9.00 'Correct Replacement forTrader TV -X.107, 108, 110, 113, 114.

0-58 List Price 69.00 'Correct Replacement forZenith S-21219.

0.59 List Price $9.00 'Correct Replacement forZenith S-22154.

0-60 List Price $9.00 'Correct Replacement forZenith S-22130.

TRIAD *CR (Correct Replacement) televisiontransformers are mechanically and elec-trically correct ruggedized versions ofmfr's items-and wherever possibleCOMPOSITE REPLACEMENT to fill a numberof requirements where mechanical andelectrical specifications are identical. Allitems are listed in Sams Photofact foldersand Counterfacts.

write for Catalog TV -155KE

TRANSFORMER CORP

4055 Redwood Ave. Venice, Calif.

RAYTHEON MFG. CO., Waltham,Mass. announces it has arranged topurchase a large plant in Tewksburyand South Lowell in order to house 700employees engaged in classified govern-ment work there.

GEORGE COHEN has been appointeddirector of service sales for EMERSONRADIO & PHONO. CORP.

JOHN 0. RIGGS has been appointedproduct mgr. of cathode ray tube linefor WESTINGHOUSE ELECTRONICTUBE DIV., Elmira, N. Y.

JENSEN MFG. CO. announces theappcintment of 14 new Hi-Fi whole-salers.

F. P. RICE has been named to thenewly -created post of director of opera-tions, Consumer Products Div., A. B.DuMont Labs. Mr. Rice was formerlydirector of manufacturing and purchas-ing.

G. WARREN KIMBALL has beennamed mgr., Battery and Renewal Com-ponents Marketing of the RCA TubeDiv., Harrison, N. J.

MELVIN L. HAYDEN was appointedadvertising -sales promotion manager ofNational Co., Inc., Malden, Mass.

TELREX INC. and TECHNICAL AP-PLIANCE CORP. (TACO) have enteredinto a patent license agreement onTelrex' conical antennas.

ROY M. HOWARD, Cleveland, Ohio,has been appointed to represent SECOMFG. CO., Minneapolis, Minn., in Ohio,West Penna., West Va., Ind. and Ky.

PACE ELECTRICAL INsmu-MENTS CO., INC., meter mfg. div. ofPRECISION APPARATUS CO., INC..announces the appointment of sevennew representatives. C. R. STRASSNERCO., Los Angeles, to cover CALIF.;A. J. NELSON CO., Denver, to coverCOLO.; J. CLANCY & CO., Angola,Ind., to cover Ind.; MORRIS F. TAY-LOR CO., Silver Spring, Md., to han-dle MD.; WOLFE-MARSEY SALESCO., Rochester, N. Y. will serve NewYork state; NORTHERN AGENCIESINC., Seattle, to cover state of WASH-INGTON and KAELBER & MACK,Manhasset, L. I., N. Y., to handle metro-politan N. Y. and Northern N. J.

TRANSFORMER REPLACEMENT GUIDE: Newcatalog lists transformer replacementsfor all model cars up to and including1955, features Merit's line of vibratortransformers, speaker outputs, and i-fand r -f transformers. Guide No. 3 isavailable from Merit Coil & Trans-former Corp., 4427 N. Clark St., Chi-cago, Ill. (Ask for No. B10-25)

Have you sent in your TestEquipment Contest entry?

See page 33.

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Institute Adopts EmblemThe Institute of High Fidelity

Manufacturers, an organizationwhose membership list includes theforemost manufacturers of highfidelity components has recentlyadopted an identifying emblem. Thisinsignia was designed by one of themembers, Mr. Avery Fisher ofFisher Radio.

MEMBERINSTITUTE OF

This emblem, which pictures alyre, the instrument of Orpheus, willbe used on all official literature. Itwill also be made available to mem-bers of the Institute for use in ad-vertising and promotion.

For further information regardingthe Institute and its activities writeto: Institute of High Fidelity Manu-facturers, 25 Broad St., New York 4,N. Y.

Beanery EmploysElectronic MealOrdering System

A young electronics engineer andan enterprising restaurateur havecollaborated to provide somethingjust a little bit different in the eaterybusiness.

Some of the more famous patronsof Barney's Beanery, on SantaMonica Blvd. in W. Hollywood,Calif, are sitting down to piping hotdinners served moments after theyarrive, thanks to a radio signallingsystem by which they flash the newsof their coming and indicate thedishes they want made ready.

The system installed at the res-taurant is designed around the oldfashioned coach lamp which standsat the entrance. This lamp is con-nected through a relay and filter toa receiver which is fixed -tuned to270 MC. The signals picked up bythe receiver are generated by smallCW transmitters which are installed

in the cars or boats of the restau-rant's customers.

When the customer decides thathe is coming in to eat, he flips on histransmitter, taps out his own codesignal, then follows it up with aseries of short or long flashes to in-dicate how many are in his party,what they want to eat and how soonthey will arrive.

As he flips his transmitter on andoff, the old coach lamp at the en-trance is flashing in unison to notifythe staff.

Reception is limited to approx-imately 25 mi.

Mac Brainard, the electronics en-

gineer who designed the system forproprietor Barney Anthony, esti-mates the cost of installing the trans-mitter in a car at about $100.00.

PHILCO announces price increasesranging from $10 to $30 on 26 TV re-ceivers effective immediately. For ex-ample: Model 4144, formerly selling for8279.95, is now $289.95 and model6320C, which was $500.00 is now $525.00.

FLIP CHART: A 21 -page colorful flip chartdescribing the "Kool-Sel" selenium rec-tifier line is available in 16" x 24" sizeand in pocket size by writing to Pyra-mid Electric Co., 1445 Hudson Blvd.,North Bergen, N.J. (Ask for No. B10-11)

rizif Money -Wets

NEW DELUXE CRT 400with 41/2' Plastic MeterThis portable Cathode RejuvenatorTester quickly locates and correctspicture tube troubles in a few minutes,right in the home, without removingtube from set! Restores emission, stopsleakage, repairs inter -element shortsand open circuits. Life -test checks gascontent and predicts remaining usefultube life. Grid Cut -Off reading indicatespicture quality customer can expect.Earns servicing dollars in minutes. Cutsoperating costs, eliminates tubetransportation. Saves money on TV settrade-in reconditioning. Pays its wayfrom the very first day.Weighs only 5 lbs. mounted in rugged, lug-gage style, carrying case covered with hand-some, durable leatherette. Size: 11 x 71/2 x 5',

Model 400. Net $5495

Send for Bulletin 104T

B a K MANUFACTURING CO.3726 N. Southport Ave. Chicago 13, Illinois

Over 20,000 CRT'SNOW IN DAILY USE

ACROSS THE NATION

NEW ECONOMY CRT 200A quick profit maker priced lowenough for every serviceman tocash in on picture tube repairs.Performs most of the functionsof the CRT 400. Has 3" meter.In leatherette carrying case.Size: II x 71/2 x5". Weighs 5 lbs.

Model 200. Net $3995


be aman

401% in theknow

at no cost!"THE CAPACITOR" comes prepaid directto your home every month -12 timesa year. 16 to 24 pages, including acomplete full length technical or con-structional article -AND the"TRADING POST" section for your ad.Yes, as a subscriber to the CORNELL-DUBILIER monthly magazine "THECAPACITOR", you can use its famous"TRADING POST" section to run an ad-vertisement (no cost to you), to SELL-SWAP-or BUY all sorts of equipmentand services helpful in your business.

.1 merrier of

CORNELL-DUBILIERoorld's largest manufacturers of capacitors

r

GET ON THE LISTFOR CORNELL-PUBILIER'S

"CAPACITOR"- YOURS

FREE

Effoto, "1 he Capacitor"CORNELL-DUBILIER ELECTRIC CORP.Dept. RT-105 South Plainfield, N. I.

_Yes Sir! Put me clown for a FREESubscription to Cornell-Dubilier's"THE CAPACITOR"

nameplease print

address (home)

city -zone _state_.-_my occupation orjob title is

New ComponentsAstron HI -TEMP CAPACITORS

Series "X" capacitors will operate upto 150° C without derating and beyondwith derating. Using Mylar and otherdielectrics, including a solid polyesterimpregnant, these miniaturized units areintended for critical operations. Avail-able in hermetically sealed tubular,"Squeeze Seam" and Bathtub cases withglass -to -metal closures, they exhibithigh insulation resistance, good stabil-ity, r -f and retrace characteristics.Astron Corp., 255 Grant Ave., Newark,N. J.-TECHNICIAN (Ask for No.10-32)

Littelfuse DISPENSERSNew single -channel fuse dispensers

can be mounted by screws in single ormultiple channels right over the workbench, facilitate stock control, show-ing at a glance when fuses need re-plenishing. Available in a packagecontaining ten channels, each adjust-able to dispense two types of fuses byfolding in tabs in the middle of eachchannel. Package includes twenty boxesof the most popular fuse types. Littel-fuse, Inc., 1865 Miner St., Des Plaines,III.-TECHNICIAN (Ask for No. 10-31)

Illinois CONDENSER KITSNew "Handee-Pak" condenser kits

are available in several assortments ofthe capacity and voltage ratings mostused by the service technician. Each ofthe paper capacitor kits is made up of10 assorted of the new Type ITC oil -impregnated ceramic -cased capacitors."Handee-Paks" consist of 5 popularassorted capacitors. Kits are on cardssealed in polyethylene bags, are factoryfresh and take up little room in theservice kit. Illinois Condenser Co., 1616North Throop St., Chicago 22, Ill.-TECHNICIAN (Ask for No. 10-33)

Ilia 1 glill'%')

EASY TO MOUNT,

1,4

Is

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VERSATILE

FOR MORE TECHNICAL INFORMATION ON NEW PRODUCTS OR BULLETINSuse his ient coupon. Enter below the reference numbers for all Items desired.

New Products Editor

TECHNICIAN & Circuit Digests480 exington Ave.New York 17, N. Y.

Please send me more information on the following items:

My company letterhead or business card is enclosed.Name

Address

Firm My positionCity State

Business address lif different from above)


R -Columbia CLEANING AIDTrolMaster, a new tool, is said to

clean and lubricate TV or radio con-trols in 60 seconds or less without chas-sis removal. Simply remove knob atfront of control, fill TrolMaster withsolvent, screw tool onto control, pushplunger in, remove TrolMaster, andwork control back and forth. Works onsingle or dual controls. User's price,$3.95. R -Columbia Products Co., Inc.,305 Waukegan Ave., Highwood, Ill.-TECHNICIAN (Ask for No. 10-38)

Sprague W -W RESISTORSFour kits contain popular values of

axial -lead Blue Jacket resistors. Thecompact wirewound resistors are use-ful where space is a problem. SamplerRK-1 includes 10 values from the 3, 5,and 10-w lines, lists at $6.55. AssortmentRK-2 has 15 3-w values, while RK-3has 15 5-w values, and RK-4 15 10-wvalues. List prices for the assortments,designed for radio -TV, are: RK-2, $8.50;RK-3, $10.25; and RK-4, $12.25. SpragueProducts Co., 65 Marshall St., NorthAdams, Mass.-TECHNICIAN (Ask forNo. 10-35)

Ram FLYBACKSThe X124 horizontal output trans-

former replaces RCA 76154, 75519, 76381and 75585, which covers 28 chassis and38 models; the X125 is an exact replace-ment for RCA 76501, which covers 9chassis and 32 models. Both units aredirect -drive type designed for 66 to 70degree systems. The X124 and X125 arecapable of delivering 12 kv and 16.4 kvrespectively. The units are relativelycompact. Ram Electronics Sales Co.,Irvington -on -Hudson, N. Y.-TECHNI-CIAN (Ask for No. 10-30)

Erie CAPACITOR KITSThe Ceramicon TV Service Kit con-

sists of an assortment of 62 general-purpose and by-pass disc Ceramicons;temperature -compensating tubular Ce-ramicons; printed circuits; and filterCeramicons in an 18 -section plasticcase. The capacitors are those encoun-tered for replacement most often. ErieResistor Corp., Erie, Pa.-TECHNICIAN(Ask for No. 10-36)

Merit FLYBACKSNew transformers are: HVO 41, re-

placement for Airline, Coronado, True -tone, Arlington, Firestone, Wells -Gard-ner, Silvertone and Warwick receivers.List price: $12.50. The HVO-42 replacesin CBS -Columbia, lists at $10.50. TheHVO-44 covers Airline, Coronado, Fire-stone, Truetone and Wells -Gardner,lists for $11.00. The HVO-45 replacesin Westinghouse, lists for $11.00. TheHVO-48 is an exact replacement forMagnavox, lists at $11.00. Merit Coil &Transformer Corp., 4427 North ClarkSt., Chicago, Ill.-TECHNICIAN (Askfor No. 10-34)

Radio Antennas

Taco HI-FI FM ANTENNASNew line of antennas has features de-

veloped for TV use, adapted to FM.Included is an omni-directional S -typeproviding circular directivity. It has abroad -band folded dipole to cover en-tire FM band, matches 300 -ohm line.By having the driven element at groundpotential, lightning protection is pro-vided automatically. Model 624L is asingle version; the 2 -stacked version ismodel 624ST-L.

A patented antenna with Twin -Drivenfeature, for extreme fringe, has sharp

directivity and high gain; is completelyassembled. Element assembly to thecrossarm is in the Auto -Lock design. Thesingle -bay antenna is Taco No. 644, andthe two -bay array is 645. Technical Ap-pliance Corp., Sherburne, N. Y.-TECH-NICIAN (Ask for No. 10-39)

A -S TWIN AUTO ANTENNAS"Double Header" twin automotive

antennas consist of a set of two 261/2"(extended) telescopic antennas, com-plete with leads. Available in triple -plated chrome finish or a choice ofbaked -on colors-red, blue, green, yel-low, white and brown. The new anten-nas will be of the same quality as the

"Baseball" Automotive Antenna. The"Double Header" is also being pre-sented as a dummy set, without leads,for decorative purposes only. Suggestedlist prices are: Complete set with leads,$12.95, chrome; $14.25, color; dummy setwithout leads, $7.50, chrome; $8.75,color. Antenna Specialists Co., 12435Euclid Ave., Cleveland, Ohio-TECH-NICIAN (Ask for No. 10-40)

0U

Lu

(r)

take

Tuners

for

example

Today's exacting mechanical re-

quirements for tuners make it

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Your RCA Tube Distributor cansupply you with an exact RCA re-

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So, cut down your call-backs,build up your profits, keep yourservicing "on the go" with genuine

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RA0/0 CORPORATIONof AMERICA

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REPLACEMENTSFOR TELEVISION

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MOST VALUABLE TV SERVICE

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181 in INSTRUMENTATIONFUNCTIONS for only

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COMPLETELY CHECKS:

4- Flybacks and Yokes4- Selenium Rectifiers4- Continuity4- Condensers4- Picture Tubes.4- Series Filament Tubes

- for Newest TV Sets

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Catalogs & Bulletins New Books

TRANSFORMERS: A new 24 -page cataloglisting 543 transformers and relatedcomponents, giving detailed electricaland physical specifications for each unit,in easy -to -read type, including illus-trations. For free copies, write to Chi-cago Standard Transformer Corp., Ad-dison & Elston, Chicago 18, 111. (Ask forB10-1)

AUDIO EQUIPMENT: A new 14 -page cata-log Nhich illustrates and describes thewide scope of high-fidelity speakers,speaker systems, components and en-closures and cartridges. For copy ofcatalog No. 123, write to Electro-Voice,Inc., Buchanan, Mich. (Ask for B10-2)

YOKE, TRANSFORMER REPLACEMENTS: Twonew catalog cross-reference sheets, onefor RCA and one for Motorola, listcomplete exact replacement line ofdeflection yokes, flybacks, vertical andpower transformers for specific sets. Allcomponents made to original specs, in-cluding lead colors, connections, mount-ings and associated networks. Todd-Tran Corp., 156 Gramatan Ave.,Mount Vernon, N.Y. (Ask for No.B10-20)

CAPACITOR: Bulletin with illustrationsand sables containing full details onthe first molded plastic tubular metal-lized paper capacitor developed. Writefor bulletin No. AB -21 on the "Comet"to Astron Corp., 255 Grant Ave., EastNewark, N.J. (Ask for B10-8)

SOUND EQUIPMENT: Information on TV &BC, PA, recording, communications,cessories, high-fidelity speakers, VESTspecial-purpose microphones and ac-cessories, high-fidelity speakers,speaker systems, etc. For a free copy ofcat. No. 123 write to Electro-Voice, Inc.,Buchanan, Mich. (Ask for B10-4)

CONDENSER MICROPHONES: An 8 -pagebrochure titled "Technical Informationon Condenser Microphones" written atthe engineering level and aimed athelping engineers and others doing pro-fessional sound work to utilize con-denser microphones to their best ad-vantage. Free from Frank L. Capps &Co., 20 Addison Place, Valley Stream,N.Y. (Ask for No. B10-5)

AC LINE FILTER: New C-728 filter enableshigh frequency units such as diathermyand ultrasonic oscillators, to meet FCCradiation requirements. Complete in-formation may be obtained from thePotter Co., 1950 Sheridan Rd., Chicago,by asking for Bulletin TNN. (Ask forNo. B10-6)

OBTAIN THE BULLETINS

describes here by writing on company letter-head to Bulletins Editor, TECHNICIAN, 480Lexingtor Ave., New York 17, N. Y., listingnumbers given at end of each item of inter-est. Please mention title of position held. Usecoupon on page 60.

RADIO SERVICING COURSE. Compiled byM. N. Beitman. Published by SupremePublications, 1760 Balsam Rd., High-land Park, 111. 192 pp. Paper cover.$2.50.

Because the earnings are considerablyhigher in the TV servicing field than inradio, technicians tend to regard radioas TV's poor stepchild. Even in theearly apprentice years, in school or onthe job, radio is something to be tole-rated until the technician can beallowed to work on TV receivers. Thislack of interest in radio has two un-fortunate results; first, a great manybasically sound radios in need of justminor repairs are gathering dust, and,second, technicians are growing up inthe business without the very necessaryand important background that aknowledge of radio fundamentals givesthem.

For the technician who made thehasty jump into TV servicing, this bookoffers an excellent opportunity to goback and pick up the fundamentals.

The introductory chapters deal withthe characteristics of sound, electronsand magnetism. A very basic treatmentof mathematics serves to introduceOhm's Law, AC circuits, and the simpleformulas for calculating resistances inseries and parallel. Review questions atthe end of each lesson provide the tech-nician with an effective yardstick forfeasuring his progress.

In addition to the usual sections onvacuum tubes, micophones, meters andpower supplies, the author includes avery useful section in the radio servic-ing business itself; how to get started,how to compute charges, and tips oneffective advertising.

BASIC SYNCHROS AND SERVOMECHANISMS,Vols. 1 & 2. By Van Valkenburgh,Nooger & Neville, Inc. Published byJohn F. Rider Publisher, Inc., 480 CanalStreet, New York 13, N. Y. 272 pp (bothvolumes). Paper cover: $5.50 for bothvolumes, $2.75 each. Cloth binding:$6.95 both volumes bound together.

With the great strides in automationand automatic control techniques, adefinite need has been felt for a com-pletely basic but thorough text fortechnicians who already have orienta-tion in electronics, but are either com-pletely or partially unfamiliar with thearea of electronic controls. This set ap-pears to fill that need. Prepared by thesame group that was responsible forthe background courses in "Basic Elec-tricity" and "Basic Electronics," thenewest text follows the same patternof systematic, heavily illustrated pre-sentation. The text is basic enough tostart by explaining "What a SynchroIs." It is thorough enough to cover com-plex "transmitters" (generators) and"receivers" (motors) of control infor-mation.


JoeServiceman

says:

ird"You can't get somethin'for nothin', especiallyQuality and Reliability"

QUIETROLETIADI MACK EEG U S. PAT CM.

... manufactured by

'QUIETROLE

the original lubricantand cleaner for quiet-ing noisy controls andswitches, costs littlemore than the cheapestimitations, but the nameassures you are gettingthe best.INSIST ON QUIETROLE

THE CHOICE OFBETTER SERVICE DEALERS

"EVERYWHERE''

COMPANYSpartanburg, South Carolina

In C-mad.t. Active Radio C T. V. Diitributor, 58 SpadinaAve.. Toronto 2B. Ontario

ask the"Man -on -the -Roof"why he prefers

TWO

TO ASET

RATCHET TYPECHIMNEY MOUNT

Model RT (Gaiv. Banding)Model RT-ST (Stainless Banding)FASTEST, SIMPLEST, MOST CON-

VENIENT EVER MANUFACTURED

Mounts In 2 simple steps. Completelyfactory assembled with no eyebolts,banding clips, nuts etc., to handle.Furnished with flat -lay, non coilingbanding, heavy gauge embossed,welded steel construction. Forged,heat treated Alum. ratchets.

Write for 1955 Catalog

SOUTH RIVERMETAL PRODUCTS CO., INC.

South River, New Jersey

pioneer &outstandingproducer offinest lineof antennamounts

ADVERTISERS INDEXOCTOBER 1955

Acme Electric Corp. 50Aerovox Corp. 53

Alliance Manufacturing Co. 19

B&K Manufacturing Co. 47,Barry Electronics Corp.Blonder -Tongue Laboratories

C.B.S. Hytron, Div. of ColumbiaBroadcasting System, Inc.

Central Electronics, Inc.

Centraiab, A D:v. of Globe Union, Inc.Claremont Tube Corp.Cornell-Dubilier Electric Corp. . 4,Crown Controls Co., Inc.

5952

18

7

5710

54

6046

Delco Radio, Div. ofGeneral Motors Corp. 45

EICO

Electronic Chemical Corp.6357

Heath Co., A Subsidiary ofDaystrom, Inc. 54

H:ckok Electrical Instrument Co. 8

Holloway Electronics Corp. 17

Hycon Manufacturing Co. 14

International Rectifier Corp. 58International Resistance Co. ... Cover 2

J.F.D. Manufacturing Co. ..... . .

Jensen Industries, Inc.Jensen Manufacturing Co. ....Jones & Laughlin Steel Corp.

Kester Solder Co.

39636411

56

Mallory & Co., Inc., P. R. 5, 12Motorola, Inc. 6

Philco Corp., Accessory Div. 9Pyramid Electric Co. 37

Ouietrole Co. 63

Radiart Corp. 4Radio Corp. of America 15, 61, Cover 4Raytheon Manufacturing Co. 20Raytronic Laboratories, Inc. 56Rider Publications 48

South River Metal Products Co., Inc. 63Sprague Products Co. Cover 3Sylvania Electric Products Inc. 49

Tampa Video Service . . 57Thompson Products, Inc. 51

Todd-Tran Corp. 62Transvision Inc. 16, 62Triad Transformer Corp. 58Trio Manufacturing Co. 41

United Motors Service,Div. General Motors Corp. 2, 3

Waisco Electronics Corp. 42Welco Manufacturing Co. 13Winegard Co. 55

While every precaution is taken to insureaccuracy, we cannot guarantee againstthe possibility of an occasional change oromission in the preparation of this index.

SAVE Mx-BUILDEICO KITS!

OVER ONE-HALFLjes"scope $44.95MILLION IN USE !

SIR Gel $19 45

ClCO 1CTS are top.quality

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Ss. EICO s 38 Kits6 42 Wired Instru-ments in stock atyour loco! jobber.Writs for CatalogT-10.

Prim 5% Ugh.. *a *to Cea.r.

84 WITHERS STREET,BROOKLYN 11, N. Y.

"Your mission is to bringback JENSEN NEEDLES

no matter what."

TECHNICIAN October, 1955 (84 pages in this issue, Including Circuit Digests) 63

NOW YOU CAN SELL

AUTHENTIC HIGH FIDELITY FOR TV

A N D

"A NEW LOOK" IN LOUDSPEAKERS FOR EVERY HI Fl NEED

BURTON BROWNE ADVERTISING

WITH THE NEW JensenYour hi-fi line is not complete without the new Jensen TV-Duette. This authentic high fidelity two-way

speaker system, in new attractive table form, brings hi-fi performance to sound -starved table TV sets . . .

gets the other half of the TV program with richly -defined music, come -alive voice and realistic picture -centered sound. There are new prospects galore in the TV owner market. "Show-off" switch lets you compare"before and after" and switch to records, tape or radio as you choose.

Also visualize TV Duette as a "new look" in loudspeakers for any hi-fi need, for it makes a beautifulchairside table . . . adds a useful decorator touch to the home. Here's sure-fire woman -appeal.

Four models priced from $85.50 to $49.50. Write for folder, "How to Make Money with TV Duette" today.

JENSEN MANUFACTURING COMPANY DIVISION OF THE MUTER COMPANY6601 S. LARAMIE, CHICAGO 38, ILL. IN CANADA: COPPER WIRE PRODUCTS, LTD., LICENSEE

WORLD'S QUALITY STANDARD FOR MORE THAN A QUARTER CENTURY64 TECHNICIAN October, 1955

capacitorreplacements

CROSLEY CHASSIS R-100, R-101

SymbolNo.

C13

RatingLIF@WVDC

50+30@l50

CrosleyPart No.

ISS006

SpragueReplacement

TVA -2450

ZENITH CHASSIS 7X03

SymbolNo.

C29

RatingµF@WVDC

80+20+20@150

ZenithPart No.

22-2399

SpragueReplacement

R-2138

MOTOROLA CHASSIS HS454

SymbolNo.

RatingISF@WVDC

MotorolaPart No.

C6 80+80@150/200@10 23B633289El Multiple C -R Plate 218621535

SpragueReplacement

R-2139DP -1

RCA CHASSIS KCS96, A, It, C, D, E

SymbolNo.

Ratingpl@WVDC

RCA

Part No.

C114 100-1-10@400/30+20@S0C195 100 +10@400/80@i350

100858100859

SpragueRePlacement

R-2140R-2141

SENTINEL MODEL SM-I010

SymbolNo.

Ratingp.F@WVDC

C78 20@450C79 200+5@150C80 140+10@300/200+30@150C81 150@ 1 SO

Sentinel SpraguePart No. Replacement

25E86 TVA -170925E85 R-164525E87 R-213125E84 TVA -1422

DUMONT MODEL RA -350, 35

SymbolNo.

C286

0287C2811

C289N201

Ratingp.F@WVDC

80+ 40 +10 +4@350

80+10@3505@ 1 00

20@350Integrator Plate

DuMont SpraguePart No. Replacement

0315.1425TVL-3792

I TVA -160103151427 TVL-267203138362 TVA -140203138364 TVA -160888000631 V-1

Sprague makes more capacitors ... inmore types ... in more ratings . .. thanany other capacitor manufacturer.Send 10C for the 65 -page giantseventh edition TV Replacement Man-ua! to Sprague Products Co., 65 Mar-shall St., North Adams, Mass., or getit FREE from your Sprague distributor.

DON'T OE VAGUE...INSIS

FOR SETS OF THE MONTH

Hare2 teeth pulled

Jur Eh,'RICE OF OM.

Teittnethe Service Bargain..

You'll never see your doctor advertise a special sale on appendectomies ...

You'll never see your lawyer announce cut -rates for divorce cases ...

You'll never see your dentist hold a "2 -for -I" sale on extractions ...

AND You'll never see the day when you can take your TV set in for a service"bargain" and be sure you're getting a square deal!

"Bargains" in home electronic serviceore as scarce as the proverbial hen's teeth'Here's why-

The expert service technician, just likeother professional people, must undergoyears of study and apprenticeship to learnthe fundamentals of his skill. And a mini-mum investment of from $3000 to S6000per shop technician is required for thenecessary equipment to test today's highlycomplex sets. Finally, through manufac-turer's training courses and his own tech-nical journals, he must keep up withchanges that are developing as fast as theyever did in medicine, law, or dentistry.Those best equipped to apply modernscientific methods are almost_certain to be

most economical for you and definitelymore satisfactory in the long run.

Unfortunately, as in any business, therewill always be a few fly-by-night opera-tors. But patients, clients, and TV setowners who recognize that you get onlywhat you pay for, will never get gypped."There just ARE no service bargains"...butthere is GOOD SERVICE awaiting you atFAIR PRICES!

MIMS ENT

SPRAGUE PRODUCTS COMPANYNorth Adams, Moss.

THIS FAMOUS SPRAGUE REPRINT

AGAIN AVAILABLE!

Blank space on the bottom for your imprint.

1,000 only $3 postpaid 10,000 or more only $25

per 10,000 postpaid.

For immediate delivery on any quantity,send us your check cr money order today!

How to "tame" a TV Sync Circuit FAST

163 ," R175)33 - 22K

is ,s

,.1040,4cI E-C 159 40.1

330CI62.0082 1

11 R180200 KAGC

CONTR3R179220K

R168 2

3.9 MEG.

V I

!2 AU7SYNC.AMPL.

41.6 V. +78 V.

CI64270

R176

+3

C170.01

R1881 MEG.

6SN7-GTVERT. SYNC.

R233 AMPL. RI85220K 470 K

+135 V.2

137 V.

RI84 CI68470 K1 100

+17.3 V.R23915K

R238100 K

Use RCA Tubes with Built -In Quality!

For instance, RCA-12AU7's and6SN7-GTB's are known for theirclose manufacturing tolerances.Microphonics are minimized. Platecurrent cutoff is closely controlled.Result: High tube stability-even duringvariations in heater voltages!

It's a fact-you can rely on RCA Tubes togive your customers stable TV pictures.That's because RCA Tubes are designed andmanufactured specifically to meet theclose tolerance requirements of TV circuitry.

So, insist on RCA Receiving Tubesfor all your service work.

RADIO CORPORATION of AMERICAELECTRON TUBES HARRISON, N.J.

First Choice for TV Circuits...dependable RCA Tubes

r milr7 00,000,001. - world radio history

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