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Service information Please...It's true some radio parts are hard to get-but there's no shortage of helpful serviceinformation. With these valuable Malloryhandbooks, you're assured of a speedyanswer to 'most every problem that pops up.

Servicemen everywhere are depending onthese comprehensive reference works tospeed up work and to save valuable manhours. Here are some of the subjects covered :

M. Y. E. Technical Manual -408pages packed with information on radiopractice and theory. Covers Loud Speakersand Their Use . . . Superheterodyne FirstDetectors and Oscillators ... Half -Wave andVoltage Doubler Power Supplies . . . Vibra-

tors and Vibrator Power Supplies . . . Auto-matic Tuning . . . Frequency Modulation . . .

Television . . . Capacitors . . . Phono-radioService Data . . . Practical Radio Noise Sup-pression . . . Vacuum Tube Voltmeters . . .

Finish the Job-litty War Bonds

Useful Servicing Information . . . Receiv-

ing Tube Characteristics. Available fromyour Mallory distributor. Price $2.00.

4th Edition Radio Service Encyclo-pedia-Complete information on servic-ing all types of controls, condensers andvibrators. Circuit references, original partnumbers and recommended replacements.A book that will pull you out of many atight servicing spot. Available from yourMallory distributor. Price 95 cents.

P. R. MALLORY & CO., Inc., INDIANAPOLIS 6, INDIANA

PAPANIZEPAP

YOSERVIOARK

SERVICEby

FRANK FAX

SYLVANIA offers you ready-made forms, imprinted withyour name, at cost, to streamline your paper work.

THREE -IN -ONE SERVICE FORM. A complete jobrecord for your files; customer's invoice,guarantee, and imprinted follow-up cards; allin one handy form, perforated for easy use.100 for $1.50; 250 for $2.50; 500 for $5.00.

JOB RECORDS. Customer'srecord and receipt, im-printed, and a completejob record for your files.100 for $1.00; 250 for$1.75; 500 for $3.00.

CIRCUIT CHANGE WARNING

Card detailing wartimeemergency circuit

changes and tube substitutions for your files,to be attached to customer's set for futurereference, imprinted and perforated for easyuse. 100 for $1.00; 250 for $1.75; 500 for$3.00; 1000 for $5.00.

BUSINESS RECORD BOOK. A simple week -by -weekbookkeeping system, specially designed foryour business. Used with Three -in -One ServiceForms, it gives you complete business recordsfor tax and other purposes. $1.00.

Send your order to your Sylvania jobberor to Frank Fax, Sylvania, Emporium, Pa.

SYLVANIAELECTRIC PRODUCTS INC.

radio service dealerCovering all phases of radio, phonograph, sound andelectrical appliance merchandising and servicing.

VOLUME 5, NUMBER 9SEPTEMBER - 1944

CONTENTS

With the Editor 2Civilian Production; War Veterans; Electronics Conference

In & Around the Trade 4Manufacturers preparing for radio production

Tubes and Parts 11Replacement items for servicemen

Record Exchange Builds Store Traffic . . . George Whittaker 1225 years' experience in merchandising

Dealers Register Customers 13Post-war radio buyers signed up now

Our Cover: Merchandising Dealer Support 13New Service Plan "Keeps 'em Working" . . . Lewis C. Stone 14

Dealers and distributors to benefitTechnical Service Portfolio Section XLI 16

Test Equipment SchematicsShop Notes 19

Experience exchange, shortcuts for servicemenThe Multi -Tester Oscar E. Carlson 20

Design, construction and operation dataDiscussion LCS 22

Records and record makers; Records to SellHow About It? 30

Radios and domestic appliances waiting forMen in the News 32

Last-minute "arrivals"Letters to the Editor 33

The customers always write

SANFORD R. COWAN....Editor & Publisher LEWIS C. STONE Managing Editor

CHARLES H. FARRELL .Advertising Manager SYLVIA BORNKOFF Circulation

Copyright, 1944COWAN PUBLISHING CORP.

Executive & Editorial Offices: 342 Madison Ave., New York 17, New YorkMember of the Audit Bureau of Circulations.

RADIO SERVICE DEALER is published monthly at 34 NorthCrystal Street, East Stroudsburg, Pennsylvania, by the CowanPublishing Corp., Executive & Editorial Offices: 342 Madison Ave-nue, New York City 17, New York. Subscription rates :-UnitedStates and Possessions $2.00 for 1 year, $3.00 for 2 years; elsewhere$3.00 per year. Single copies: 25c. Printed in U. S. A. Enteredas Second Class Matter October 3, 1941 at the Post Office at EastStroudsburg, Pa., under the Act of March 3, 1879. All subscribersshould allow at least three weeks for change of address. Every-thing concerning subscriptions should be directed to CirculationDept., 342 Madison Ave., New York 17, N. Y. Material submittedmust contain a self-addressed stamped return envelope. Whileevery effort will be made to handle articles with care, the publisherassumes no responsibility. Material accepted is subject to anyrevisions, including change to, or omission in "by-line" as well asauthor's name, which in the opinion of the publisher may be deemednecessary or expedient. Payment will include all photographs,sketches, diagrams as well as all of the author's right, title andinterest in and to the material submitted. Material submitted willbe considered to have been released by the person or persons shownor mentioned therein, and the authors agree to hold this publisherharmless from any manner of suit or damage resulting from theprinting of said pictures or articles.

RADIO DIVISION

September, 1944 1

Resumed Civilian ProductionALTHOUGH appliance manufac-turers have been given the go-ahead signal by WPB, materialshortages greatly retard most pro-duction schedules, and will for awhile. Motors for mixers, refrig-erators and vacuum cleaners andchrome -nickel wire for toastersand ironers are practically unob-tainable.

No civilian radio set productionis likely to be authorized this yearbut will be as soon as Germanyfalls. Signal equipment orders ex -

War Veteran SubsidiesIT is rumored around the Capitolthat legislation is being consideredwhereby honorably dischargedwar vets, who want to start theirown business, may be granted aGovernment loan, subsidy orbonus approximating $2,000. Suchan amount would amply suffice toestablish a radio -appliance servicedealer business. Millions of men inthe Armed Forces have learned alot about radio in the past two

"Victory Line" and L-76 RevokedWPB made two excellent moveson August 28th. First, the produc-tion of so-called "Victory Line"components was ordered stoppedso manufacturers can concentratetheir efforts on standard lines, theincreasing over -run of which is tobe made available for civilian use.Second, L-76 which prohibited theproduction of many tube types,especially battery set types, and

Impending Industry ConferenceTHE October 19-21 ElectronicParts & Equipment IndustryConference being held at Chicago,co -sponsored by the RMA's PartsDivision, Sales Managers Clubsand NEDA should accomplishgreat deeds for the industry as awhole, and particularly for deal-ers and distributors.

It is regretable that no one or-ganization, national or sectional,

ceeding a quarter -billion dollars amonth are being processed bymanufacturers, leaving them nofacilities for civilian production.

Most receiver manufacturershave already announced that theyare all set to resume civilian pro-duction and merely need a greenlight. Dealers, distributors and thebuying public are straining at theleash waiting for merchandise.When Germany goes "Boom!"radio -appliance dealers will enjoya boom, and that's not double-talk.

years and naturally many plan tomake it their postwar life profes-sion.

Progressive dealers, meanwhile,are already accepting down -pay-ments on to -be -delivered radiosand appliances, with customers tobe served in order of receipt oftheir commitments. Better startlooking into this clever merchan-dising idea.

which limited production to 117

types, was revoked. Dealers mustnot expect distributors to get im-mediate delivery of standard partsor scarce tubes for the "Victory"parts will still come through forsome time, and tube makers arenot able to swing into restricted -type tube production at once. Butthe over-all picture is brighter.

exists to represent the interestsof all service dealers at the Con-ference. As the bulk of theNation's leading service dealerestablishments subscribe to thispublication, we shall try to rep-resent them, "sincerely althoughnot with official authorization."

2Radio Service Dealer

dth

measuring mighty musclesof midget motors

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Utah's complete testing service is

playing an important part in the wareffort today, and is scheduled for anequally important role tomorrow . .. inadapting war -born electronic and radiodevelopments to commercial and con-sumer needs. * * *Every Product Made for the Trade, byUtah, Is Thoroughly Tested and Approved

Keyed to "tomorrow's" demands: Utah transformers,speakers, vibrators, vitreous enamel resistors, wirewound controls,

plugs, jacks, switches and small electric motors.

Utah Radio Products Company, 8 3 6 Orleans Street, Chicago 10, Ili,:

LSeptember, 1944

Saroffild#te 74,7aaBeing a condensed digest of some of the happenings inand around the radio trade as compiled by the Editors

RCA Victor DistributorM. F. Blakeslee, RCA Victor's east-

ern region manager, announces ap-pointment of Bickford of Buffalo, Inc.,as wholesale distributor of the com-pany's line of radios, phonographs, rec-ords, tubes and television. The organi-zation is headed by Paul and LouisWolk.

Zenith Policy for DealersH. C. Bonfig, vice president in charge

of household radio, announces thatZenith Radio Corporation's program offuture expansion has now reached thepoint where it is time for distributorsto begin active work on adding strengthto the company's already virile and ag-gressive dealer organization.

Zenith has already decided on a num-ber of fundamental policies: "First,"Mr. Bonfig stated, "Zenith is commit-ted to a policy of remaining in theradionics field exclusively. By confin-ing our efforts to the line of businesswe know, we will render infinitely bet-ter service. We intend to continue ourpolicy of distributing merchandisethrough independent distributors anddealers.

This was announced at a Philadel-phia conference with distributors-thefifth in a series of round table discus-sions which began in Chicago in July.Mr. Bonfig, accompanied by Edgar G.Herrmann, assistant vice president anddirector of advertising, and by E. R.Taylor, manager of Zenith's sales plan-ning division, had similar meetings inCleveland, Boston and New York.

Hoffman Radio ReadiesR. J. McNeely, sales manager of the

Hoffman Radio Corp., Los Angeles, fora number of years, but who becameplant superintendent since the war, hasreturned to his sales post. His imme-diate work for the organization will bein planning the distribution of Hoff -man's post-war lines.

4

Frank M. Folsom,vice president,shakes hands withBickford of Buf-falo's Paul Wolk,RCA Distributors.

)Iestinglrousc Resumes RadiosWalter Evans, Vice President, an-

nounces appointment of Harold W.Schaefer as assistant manager of thenewly formed radio receiver division ofthe Westinghouse Electric and Manu-facturing Co., Pittsburgh. He will bein charge of engineering and produc-tion under Harold B. Donley, managerof the new division.

As soon as conditions permit, West-inghouse will build and sell a completeline of home radio receivers, includingstandard receiving sets and frequencymodulation, with and without phono-graph combinations, and home tele-vision equipment. Engineering and de-velopment work is already under wayon these new models. The company lastmanufactured home radio receivers in1928.

Since then, Westinghouse has beenactive in virtually all other fields of

H. C. Bonfig, vice president,Zenith Household Radio.

radio research, development and manu-facture. The radio division at Balti-more and the company's lamp divisionat Bloomfield, N. J., build basic elec-tronic equipment for broadcasting sta-tions.

Motorola's Trade PlansThe sales management of the Galvin

Manufacturing Corp., is now developingcomplete plans for post-war radio dis-tribution, many of which will soon beannounced to the trade. The companywill resume the civilian production ofa complete line of AM and FM homeradio, automatic phonographs, port-able and personal radios, standard andspecific automobile sets, and 2 -way ra-dio telephone systems. Immediatelythe green light has been given byWPB, Motorola will be in an excellentposition for quick conversion, as theyhave concentrated wholly upon radiomanufacture throughout the war pe-riod.

Bendix Home Radio SetsErnest R. Breech, president, an-

nounces the Bendix Aviation Corpora-tion will manufacture and market aline of home radio sets through theBendix Radio Division, as soon as themilitary situation permits. Improve-ments in quality and performance ofchassis components, speakers and rec-ord -playing mechanisms will be fea-tures of the complete line of AM -FMhome radio and radio -phonograph com-binations, to be manufactured at theBaltimore plant.

Models will be offered to the publicat popular prices through selected dis-tributors and retailers. Campaigns innational and local advertising mediaacquainting the public with the newlines, will begin as soon as the com-pany's war production program is com-pleted. This production includes air-craft radio receivers and transmitters,ultra high frequency and micro -waveequipment, aircraft instrument landingsystems, precipitation static dissipators,and more recently adaptations of mili-tary models to intercommunicationunits for railways and municipal mobileequipment.

Mr. W. P. Hilliard, general managerof the Radio Division, believes that thetremendous volume of production forwar (which recently reached a $200,-000,000 -a -year level) has pointed theway to production of high quality radioequipment at a price well within therange of the average person's peace-time pocketbook. In the meantime, thecompany is establishing distributionand sales channels to prepare fortransition to peacetime production, mer-chandising and employment.

Stromberg-Carlson Gets SetClifford J. Hunt, sales manager of

the radio division of the Stromberg-Carlson Co. of Rochester, N. Y., an-nounces the appointment of Frank J.McCloskey as southern region radiosales representative. He will contactdistributors and key dealers of the com-pany's lines of radio, F -M and televisionsets. Mr. McCloskey will also aid inthe establishment of area distributor-ships, opening of key trading areas inreadiness for the time when the post-war line is available and supervisingthe selection, training and assignmentof sales personnel.

(Continued on page 6)

Radio Service Dealer

CAMERAMAN TRACKS DOWN A TRADITIONCome war or high water, there is one tradition in the radio industrythat continues to stand the test of time! It is the traditionalquality for which every Meissner product is famous. With this inmind, our roving photographer recently made another trip to

Interesting, intricate are words which might well describe someof Meissner's highly specialized equipment (above and below)but "precision -el" is the one word which fits the company'shighly trained personnel.

asset. Part of the answer he found in busy experimental laborator-ies and in superior manufacturing equipment. But most of all hefound it in the skill of workers on the long assembly lines or in thecare and pride revealed by every individual Meissner craftsman.

Meissner production line.

Father and (right background) son ate typical of the way Mt. Carmelfamilies have turned to electronics for lifetime work. Meissner isMt. Carmel's leading industry.

ifraTISKVIRMANUFACTURING COMPANY MT. CARNE,:, ILL.

ADVANCED ELECTRONIC RESEARCH AND MANCFACTIIRE(Export Division: g..)5 Warren Street, New York; cable, Simovtrice, New York)

September, 1944 5

In Trade(from page 4)

Sprague's New CapacitorCatalog

Dry electrolytic capacitors are estab-lishing new standards of performanceon applications formerly reserved formore costly types, and the new SpragueDry Electrolytic Catalog No. 10 con-tains compact "Size Factor Tablets" tomake it easy to select a capacitor ofthe proper size, shape, voltage, andcapacity, or any desired combination.Types cataloged include cardboard andmetal tubulars, cylindrical metal con-tainer types, high -capacity low -voltage,cylindrical "FP" types, octal base, A -Cmotor starting and special purposetypes. Application notes include a num-ber of characteristic charts. Copies canbe had from the Sprague Electric Co.,North Adams, Mass.

Emerson DistributorsCharles Robbins, vice president, an-

nounces appointment of Neidhoefer &Co., Milwaukee, Wis., and Auto Equip-ment Co. of Denver, Col., Dixie RadioSupply Co., Columbia, S. C., and JamesSupply Company, Chattanooga, Tenn.,as distributors of Emerson Radio prod-ucts in those territories.

Activity on the widely heralded Emer-son Radio "P.D.Q." Plan will be insti-tuted by these firms immediately. Un-der this plan, the dealer issues a pref-erence certificate to the consumer, whichhelps expedite early delivery of the typeof radio set for which the consumer ex-presses preference when signing the"P.D.Q." Register in the dealer's store.The plan is being utilized by thousandsof dealers throughout the country.

Philip M. Pritchard

Tube CatalogRex L. Munger, sales and advertising

manager, announces a new catalog con-taining full information on all tubesmanufactured by Taylor Tulles, Inc.,as well as several new tubes for theultra and very high frequencies. Cata-logs can be had from local distributorsfree, or for 25 cents to cover mailingcosts direct from the manufacturer,2312 Wabansia Ave., Chicago.

White Star to Utah RadioFred R. Tuerk, president of Utah

Radio Products Co., announces a WhiteStar Award signifying that the firmhas maintained the high standard setsix months ago when they won theArmy -Navy "E" pennant. Three Chi-cago plants and another in Huntington,Indiana, are producing radio and elec-trical equipment for the armed forces.

H. C. Bonfig, Zenith Radio Corporation's vice president in charge of householdradio (right), discusses future merchandising plans with E. L. Davis and JimPause of Reinhard Bros. Co. Inc., Zenith distributors in Minneapolis, Fargoand Aberdeen, at a cocktail party given recently for distributors. Gentleman atleft scratching his foot thoughtfully . . . is evidently thinking with his "feet

on the ground."

E. Bruce McEvoy

Sylvania Personnel ChangesC. W. Shaw, general sales manager

of the radio tube division of SylvaniaElectric Products Inc., announces pro-motion of Philip M. Pritchard to man-ager of equipment tube sales for theeast central division. The new managerwas for eight years a member of thecompany's radio division sales staff.

E. Bruce McEvoy is appointed as-sistant to L. S. Raynor, radio tubeequipment sales manager for the east-ern division. Recently discharged fromthe army, Mr. McEvoy was formerlywith North American Lamp Companyand with Ken-Rad Incandescent LampsDivision. Both appointees will work outof the New York office.

Weston Staff ChangesCaxton Brown, president of Weston

Electrical Instrument Corp., Newark,N. J., announces changes in the engi-neering department. John H. Miller ispromoted to chief electrical engineer;Frank X. Lamb is his assistant. KarlM. Lederer is assistant director of re-search, and W. N. Goodwin, Jr., con-tinues as vice-president in charge ofresearch and engineering.

Jobs for Signal Corps VeteransWesley M. Angle, president of Strom -

berg -Carlson Co., Rochester, N. Y., ischairman of the subcommittee on post-war employment problems of the Na-tional Association of Manufacturers. Inan article published by the Institute ofRadio Engineers, he makes the pointthat today's war -accelerated uses ofradio, radar and electronics makes itimperative that the nation's radio engi-neering -minded youth in the armedforces or at school assume their placesin the profession with the least possibledelay. These young engineers of recenttraining must be looked upon as the"new blood" and the potential discover-ers of new applications of communica-tions' principles. The field of communi-cations engineering promises to offerricher, fuller and more compelling in-terests than its sister fields in tomor-row's world.

Aerovox Awarded "E"For excellence in war production, the

Army -Navy "E" Award has been madeto Aerovox Corporation, New Bedford,Mass.

6 Radio Service Dealer

F. D. Masters (left) Stewart -Warnerradio division manager, examinesfranchise with G. E. Gunther of But-ler Bros., first new distributorsappointed to handle post-war line.

General Mills Appoints ImhoffHarry A. Bullis, president of Gen-

eral Mills, announces the appointmentof Roscoe E. Imhoff as sales managerin charge of home appliance sales withheadquarters in Minneapolis. The homeappliance line is part of the company'sMechanical Division under the super-vision of A. D. Hyde, vice president.

The company's plans provide for aline of volume -selling small home appli-ances, as typified by coffee makers andhome mixers, to be sold through con-ventional trade channels.

With Westinghouse since 1919, wherehe had last been sales manager of themerchandising division, Imhoff left in1940 and joined Proctor Electric Com-pany as vice president and general salesmanager. With this appointment, Gen-eral Mills begins to build a sales organi-zation to market its lines of applianceswhich are expected to be ready as soonas reconversion permits.

Ranges Coming InA drop in the bucket compared to the

estimated demand is WPB's authoriza-tion of three manufacturers to producea total of 5,638 standard, four -burnermodel electric ranges in October, No-vember and December. They are: Frig-idaire division, General Motors Corp.,2,344 ranges; 2,500 ranges from Gib-son Refrigerator Co., and 794 rangesfrom A. J. Lendemann and Hoverson.

These producers are able to meettheir quotas without interference withwar work. Since standard ranges havenot been made for about two years, itis said that production might be de-layed by the need for preparing equip-ment.

The Government hopes to authorizethe production of 88,000 electric rangesfor household use this year, or about16 per cent of the pre-war output. Butnone of the four -burner ranges willreach dealers until late in the year, andmost of them not until early in 1945.Then, only for essential replacementssales.


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Call your nearest Stancor Jobber...c or write us for his address

STANDARD TRANSFORMER CORPORATION1500 N. HALSTED STREET CHICAGO

In Trade

Gorernntent to ReleaseSurplus Tube Stocks

Through ManufacturersAccording to Bob Almy, manager dis-

tributor sales, Sylvania Electric Prod-ucts, Inc., radio tubes are one of thefirst items in the electronic classifica-tion which the government has listedfor disposal. Radio tubes were selectedbecause there are relatively few manu-facturers and a critical civilian short-age exists.

The first lot of radio tubes whichhas been declared surplus by the gov-ernment will soon be released. The ex-act quantities are not yet known. It isbelieved that the majority of receivingtypes can be absorbed quickly in thecivilian market, if they are not neededfor war orders.

Bob Almy questions if the first tuberelease will make a sizable dent in theoverall shortage condition; and whendistributed nationally, will not be par-ticularly noticeable to individual radioservice dealers and their customers.

On tube production, reports from thefield show that deliveries of "MR" tubeshave generally improved during thepast sixty days. Certain types such asthe 12SA7GT/G and the battery typescontinue on the "acute" list.

Of the 4,500,000 "MR" tubes sched-uled by WPB for the third quarter ofthis year, it is doubtful if the goal of1,500,000 per month will be exceededappreciably. The WPB is reviewingfourth quarter schedules, though, withthe view of authorizing additional"MR" production, particularly criticaltypes. Our feeling is that the fourthquarter will see gradual improvementin "MR" deliveries in types and quan-tities.


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What every dealer knows: tubes in andout of stock (from Century Radio Co.)


The Army -Navy Production Awardfor outstan,lip 0, achievement in producing vitally im-portant materials essential to the war effort will be anadded incentive to the management and employees of

WARD PRODUCTS CORPORATION to keep producing moreand better equipment for the men who are doing thefighting. While yesterday WARD Antennas were acces-sories for pleasure, today they are implements of War.

THE WARD PRODUCTS CORPORATION, 1523 EAST 45TH STREET, CLEVELAND, OHIO

September, 19 1 9

USA 111111PED"HOME ENTRY" AND "CONFIDENCE" WORKERS

BIG OPPORTUNITY FACING YOUAs a result of your knowledge and skill in radio, you are welcome in the

homes of your community. Your statements carry weight because yourcustomers have confidence in you. Have you thought what this sales advan-

tage means to your future? To meet that future, when there may be lessservice work, MECK has planned a line of Radios and Phonographs that are

Built to Perform and Priced to Sell. MECK is offering you "Rosy Future's"

Date Book-Free-to record the future needs of your present service cus-tomers. Send for your copy today. Then - when "Delivery Day" comes,

meet those customers' needs with MECK Radios and Phonographs.

'suet to PeAjtprot - Poteeed to Sete

WRITE FOR 7"tee"DATE BOOK" NOW

Pocket size, dur-able-yet startedon YOUR post-warplans now. Justwrite-it's free!

BUY MORE BONDS-AND WEEP THEM!

10

DISTRIBUTED NATIONALLY THRU RADIO PARTS JOBBERS

Ery RADIOS PHONOGRAPHS

INDUSTRIAL SOUND

JOHN MECK INDUSTRIES, PLYMOUTH, INDIANA, U. S. A.

ADDRESS DEPT. RSD-9


TUBS and PARTS

ACCORDING to the findings of ameeting of the Electronics Dis-

tributors Industry Advisory Com-mittee held recently in Washingtonunder the auspices of the War Pro-duction Board, lines of radio re-placement parts will remain stan-dardized in accordance with the re-strictions of WPB L-293, which isin effect for the primary purposeof conserving critical materials.Standard lines are now in existenceon paper and electrolytic condensers,transformers and choke coils. Stan-dardization of volume controls is notas necessary now as it was 2 yearsago when the order was issued. Asfar as radio and radar equipmentis concerned, the bottleneck is inmanufacturing facilities and not inmaterials.

Deliveries of victory line trans-formers have been, according to re-ports, very poor, particularly onpower transformers. It is believedthat the victory line might as wellbe eliminated since transformerswere fairly well standardized any-way. A further objection to the vic-tory line is the lack of a small, 6 -volt transformer, which would prob-ably be the largest -selling type. Thedimensions of the victory line trans-formers are too large for the chassisof a table model radio because theline is made to better specifications,involving additional materials suchas larger core and more wire.

But some of the restrictions con-tained in the above order have beenrelaxed. Condenser manufacturers,for example, have been permitted touse aluminum cans. A similar stepis planned for transformers, sinceproducers who request it will beauthorized to make specific quanti-ties of their regular transformersfor replacement purposes. That doesnot mean that a special run will beallowed, but merely an increase be-yond the quantity for which thecompany has military and industrial

,orders. At present it does not ap-pear that much production will beauthorized until the fourth quarterof 1944, but by the end of the yearthe transformer situation should bebetter. In general, however, theradio industry may be one of thelast to be freed from all restrictions.

Replacement Tubes

Early this year the WPB beganissuing firm production directiveson all glass GT receiving tubes.Manufacturers were directed to pro-duce certain quantities of tubes of

Wily radio service dealersare hard -up for trade re-placements. Peace in Eu-rope will see release ofparts for volume businessin civilian radio service.

each type, marking them "MR" andto interchange a specified numberwith each of the other manufac-turers on a basis comparable to the1941 inter -manufacturer distribu-tion. Manufacturers have been askedto allocate tubes to their distribu-tors in accordance with their 1941pattern for the sale of carton -packedtubes. Private -brand lines for whichcarton -packed tubes are purchasedare included in the allocation, butequipment manufacturers who buytubes in bulk and then repack themare not. Each tube manufacturerhas presented a definite distributionplan, which has been approved bythe WPB.

But radio service dealers shouldbear in mind that the peak in warproduction has not yet been reachedin the electronics industry. Tomeet this year's schedules the indus-try must produce during the lasthalf of the year at a rate 25 percent greater than ever before. Butin receiving tubes, all military re-quirements for metals, glass GT's,and locktals should be met duringthe third quarter.

On the basis of a yearly require-ment of 18,000,000 tubes, virtuallyall civilian requirements should beproduced during the third quarter(which ends in September) . Sincethe going rate for the first 5 monthshas been only 16,000,000 a year, thesituation is improving. While the

"Maybe it's clogged with corn, we'vebeen listening to lots of comedians."

Division has given the producers 100per cent of their material require-ments and has not attempted to holdback production in any way, over-all production has decreased becauseof attempts to switch from one typeof tube to another. Moreover, evena yearly requirement of 18,000,000tubes will not satisfy the demand,since 1941 shipments of carton -packed tubes were 33,000,000.

An industry representative esti-mated that the normal demand forthe last few years has been as. muchas 65,000,000 or 70,000,000. Al-though the figures published by theRCA license bureau for 1941 wereonly for 36,000,000 tubes, it is be-lieved that many tubes purchasedin bulk have been used for replace-ments rather than for originalequipment. The fact that no newradio sets have been made since1941 means that demand has sub-stantially increased. In additionproduction in 1942 and 1943 hasmet only a fraction of even the36,000,000 tube requirement.

Tubes For DealersInsofar as distribution of tubes

is concerned, the point might bemade (which RADIO SERVICE DEALERhas made time and again) that inmetropolitan areas especially deal-ers are not receiving fair treatment,because numbers of distributors areholding tubes to use in their ownrepair and servicing departmentsrather than allocating them to deal-ers. Because of complaints receivedfrom consumers in small marketschanges in WPB -547 have been sug-gested which would rate distributorson their past sales and the factor ofpopulation shifts, applied to thetotal number of tubes actually man-ufactured. But it is generally be-lieved that no change should bemade, and that the present systemin which quantities to which rat-ings were assigned were based onlyon distributors' past sales, shouldbe given a longer trial. And anyway,many of the complaints are consid-ered unjustified, in view of condi-tions. If there were sufficient pro-duction of a limited number of crit-ical types for one quarter, the prob-lem would clear up automatically.

There are about 20 types of tubesthat are the most urgently needed,and except for the fact that thegreatest complaint in rural areashas to do with the lack of batterytubes, production of which wasstopped by L-76, other complaintsare not always so well justified. Theloudest protests come often fromthose who were not in the radiobusiness in 1941 or from dealerswho are unwilling to take any stockexcept the most critical types oftubes. Actually, distributors havebeen reluctant (to put it mildly) toallocate any tubes to dealers whoare entitled to them unless theyagreed to buy a lot of extremely slowturnover tubes as well. -L.C.S.

September, 1944 11

Record ExchangeBUILDS STORE TRAFFIC

WEEKS & DICKINSON havebeen in the record -merchan-dising business for over 25

years. The war has changed manyaspects of their record -vending busi-ness but it has added new and un-usual selling methods which are wellworth discussing.

Weeks & Dickinson believe thatthe average defense worker invari-ably is thoroughly tired after puttingin a hard day at a lathe or drill press.Music is the most satisfactory wayof giving them a "lift." For thatreason, this music dealer sponsorsa half-hour weekly radio programconsisting of recordings of musicrequested by defense workers in the

In business 25 years, thisrecord merchandiser makesa "specialty" of variety indiscs. "Service Bar" offersspecial numbers for armedforces. Children are maderecord -conscious thru clubs

community. Any worker may comeinto the store and leave the name ofhis or her favorite tune-classicalor otherwise-to be played on aforthcoming program. Names arenot mentioned but the recordings

by George Whittaker

are played and the worker recognizeshis desired musical number.

Another feature of Weeks & Dick-inson's wartime program is the es-tablishment of a "Service Bar." Thiscounter features musical recordingswhich can be sent to boys and girlsin the service. Practically every do-mestic camp has one or more phono-graphs available and the boy orgirl receiving his or her recordingsfrom home can easily arrange to havethem played without undue difficulty.

At this counter may be found the"Service Hit Parade," a list of num-bers especially popular with service-men and servicewomen. This actsas a guide to the purchase of records.


In order to especially plug this"Service Bar," Weeks & Dickinsonrecommends a five-minute weeklyradio program entitled, "In the Serv-ice." On this program news of pro-motions, transfers, and other hap-penings of interest to armed forcesare mentioned. Naturally, the com-mercial stresses the desirability ofgiving records to servicemen on theirbirthdays, anniversaries, or just anyold time.

Nor is this the only "Bar" atWeeks & Dickinson. They have a"School Days" bar in another sectionof the store where musical record-ings of interest to boys and girlsfrom the first grade through highschool are featured.

Boys and girls have a special clubof their own where they make apurchase of at least two recordingsper month. At the end of fourmonths, when eight records have

Cover photo, showing actualpoint -of -sale easel display.

been purchased, they receive a recordabsolutely on the house. Selectedlists of recordings are made up anda mimeographed copy of the list isgiven to each pupil in the school sys-tem. The list is divided into sec-tions, each section featuring record-ings which have particular interestto students of say the first, second,fifth or seventh grades. Teachers aremore than happy to give out theselists to pupils because it makes theirclassroom more musically inclined.It takes but a little time to mimeo-graph these copies and children areasked to look over the list and talkover the list with their parents.

Weeks & Dickinson realize thatthe average family is more apt tohave a victrola in its home that isnot being used than it is a radio.Families are so used to twisting adial to pick up the radio news thatthey do not think of the enjoymentto be derived from their phonograph.For this reason, the firm runs aseries of newspaper displays point-ing out the advantages of phono-graph usage. Among the advantagesmentioned in the ad are (1) abilityto play a tune over again as oftenas desired; (2) freedom from staticor man-made interference; (3) use-

fulness of the victrola to allow chil-dren who practice on the piano orsome other musical instrlment toappreciate the way a real profes-sional plays a certain tune or pas-sage.

Also, they run ads pointing outthat by running the phonographmore and the radio less for the dur-ation, scarce radio tubes and otherparts may be conserved, for it is awell-known fact, says Weeks & Dick-inson in the ad, that if a radio givesout, it may not be repaired for someweeks or even months.

The company also promotes a rec-ord exchange where possessors ofrecordings two, three or four yearsold may trade them for other usedrecordings. Those having used rec-ords bring them to the store to tradethem for others which they desire.This department is in charge of asaleslady who concentrates entirelyon the recordings from one to fifteenyears old. The trades are usually"even-steven," though occasionallymoney is involved. Weeks & Dickin-son makes no direct profit-or verylittle-from this department but it isone of the greatest traffic -buildersthis store has ever known.

DEALERS REGISTER CUSTOMERS

Announced by Ben Abrams, presidentof Emerson Radio and Phonograph Cor-poration, the company's new radio pro-gram, "You Can't Take It With You,"is important to the marketing side ofthe radio industry as it will be used asa vehicle to publicize the great post-war plan for Emerson Radio dealersknown as the "P.D.Q. Plan."

With the P.D.Q. Plan, the dealergets: streamers for window display,point -of -sale counter easels, a Prefer-ence Delivery Quota Register with roomfor about 150 names on detachableblanks and a stub book of certificates.The customer gets: advice-to registerwith the dealer right then and there.In three stages the customer is movedalong to the final result:

"1. Sign the Preference DeliveryQuota Register now. Write in yourohoice of the type of set you think youwill want.

"2. You will be given a PreferenceDelivery Quota Certificate to keep untilsets, become available.

"3. Then all you will need do isbring in your certificate and everyeffort will be made to give you prefer-ence in your purchase of an EmersonRadio.

"When civilian production begins itwill take more than a year to catchup with the public demand for new

Emerson's Dealer support-P. D. Q.-keeps consumers"tuned -in" on buying radios.

radios. . . . This is not an order. Youwill be under no obligation to buy. Youpay nothing until you have made yourpurchase. Your Preference DeliveryQuota Certificate simply means thatyou will be assured early delivery ofa new postwar radio. . . ."

Dealers are asked to return onlycompletely filled in register forms, di-rect to the manufacturer, although theymay have gotten the register foliosthrough their jobbers.

Naturally, this merchandising planhas attracted many "write-in" appli-cants. That is, those who have neverbefore been radio or appliance dealers,but wanting to enter the field after thewar find the PDQ plan tailor-made tohelp them break in to what promises tobe a gigantically lucrative business.According to Jack Gaertner, advertisingmanager, the company considers suchapplicants, with few exceptions, to besheer opportunists. They are eager toget in on the first "cream" demand, butwill drop out when that tapers down tomore normal levels. Well establishedoutside retail outlets (such as depart-ment stores, or hard goods stores whereradios are logical plus lines) may, how-ever, be added to the roster of legiti-mate dealers where it is warranted bylocal competitive conditions.

The PDQ plan serves more than onepurpose:

1. It qualifies the buyers well aheadof time, together with the modelswanted.

2. Since the register provides spacesfor checking two varieties each of ra-dios, phono-radios and portables, be-sides "other type" (which customersifill in with "television" "FM" and thelike) the company gets a preview of thekinds of models it should put intoproduction first. Some customers havebeen found to indicate a "full -line"purchase, such as: 3 table models, 1console combination, 1 3 -way radio, 2personal radios and 1 television set.

3. The column, "price I would pay,"gives the company an idea of the rangeof models that can be most profitablyproduced for immediate postwar de-mand. With few exceptions Emersonfinds that the prices entered by cus-tomers fall within established ranges,so the entries offer reasonably accurateindications of the kind of money thecustomer actually has for post-war ra-dio buying.

The customary quotas for distributorsand dealers are not being set up asyet-too early. But the stir being cre-ated by the P.D.Q. plan in the trade,and with customers through the radioprogram "You Can't Take It WithYou," is accomplishing a great dealtowards making the public radio -pur-chase -conscious, against the strenuouscompetition offered by other types ofconsumer goods.

September, 1944 13

Advice to worn appliance users in handy booklets arranged for dealer -imprints.

NEW

Servicing Plan "KEEPS 111 WORKING"by LEWIS C. STONE

Managing Editor

ASTREAMLINED household ap-pliance service plan designed by

General Electric to improve servicefacilities to the consumer, and at thesame time to cooperate fully withWPB's material conservation effortby conserving replacement parts foruse only in making essential repairs,is in operation in San Francisco,Boston, Atlanta, New York, NewJersey, Philadelphia and Chicago,with additional locations beingplanned. A separate service pro-gram for radios and combinations isbeing developed by the radio, televi-sion and electronics department ofthe company.

This operation need not interferein any way with already well estab-lished and smoothly functioning dis-tributor and dealer service facilities.With the aid of local advertising thecenters make it easier for housewivesto avail themselves of reliable serv-icing, and it may mean a perma-nently improved system of applianceservice to the public. The way the

14

General Electric ApplianceService Centers encourageconsumers to consult localservice dealers. Parts andservicing speeded on majorand "traffic" appliances.

Photos courtesy of General Electric

regional service centers may oper-ate will vary with the particularproblems and requirements of theareas which they serve.

Some distributors, for instance,(particularly in metropolitan areas)may call on the service centers forparts only. Others will encouragetheir appliance service center dealer-ships (qualified service dealers) tomake use of the regional centers notonly for parts, but also for servicefacilities over and above the stand-ard services performed by dealers.

Each distributor or dealer withinservicing distance of the regionalcenters will have the advantage ofdrawing upon a more complete localstock of replacement parts than hemight be able to maintain, and hewill not be required to have a largeinvestment tied up in parts. More-over, there will be fewer replace-ment parts lying unused on theshelves of one regional service centerthan would be required to fill theshelves of each of several distribu-tors. Therefore, the plan allows asmaller backlog of parts in each re-gion, thus conserving parts and mak-ing them readily available to thecustomers who need them.


Dealer Service CentersG. E. dealers who are in a position

to offer adequate repair facilities inaccordance with minimum standardsoutlined in the plan, are authorizedas local G. E. appliance service cen-ters in their communities. Funda-mental and refresher courses of in-struction are available to the servic-ing personnel of appointed dealers.Such dealers are required to havethe following qualifications :

1. Adequate trained personnel.2. Adequate stock of supply

parts on all products serv-iced by the dealer.

3. Shop equipped to make min-imum standard repairs.

4. Installation and service rec-ords.

5. Up-to-date file of servicemanuals, price lists and cat-alogues.

6. Handle with courtesy callsfor service which he is notequipped to render, whichmeans either sub -letting thejob to the nearest qualifiedshop or directing the cus-tomer to one.

7. Identify his store adequatelyas a headquarters for G. E.service, with decalcomaniadisplays and local advertis-ing.

8. Equip all servicemen withadequate tools.

How It WorksLet's suppose that dealer Jones in

Fitchburg, Mass., is the local G. E.appliance service center. He handlesa fairly complete line of appliancesand can make all of the repairs re-quired in G. E. minimum standardsfor dealer service centers. A Mrs.Smith comes in to dealer Jones with

a number of G. E. appliances whichwere broken when a moving van wasdamaged in an accident. The itemsinclude a refrigerator, range, clean-er, fan, clock, and radio.

Jones has on hand the most com-monly called for repair parts on mostof the appliances. But in the acci-dent, several of Mrs. Smith's appli-ances suffered unusual damage.Through his distributor Jones ordersfrom the regional G. E. applianceservice center (in Boston) the partshe needs for repairs which he is ableto make. The parts are shipped thesame day if his order reaches thecenter before 4 p.m., and the partsarrive at the store the followingmorning. Overnight service is theaim of the regional centers withintheir coverage.

A few repairs on the range are ofmajor character and they requireheavy, expensive equipment. Thedealer ships those jobs to the servicecenter. Jones doesn't sell clocks, buthe has on hand full information onthe repair of Mrs. Smith's clock. Hemay either sublet the clock repair jobto the nearest authorized G. E. clockrepair shop, or he may tell Mrs.Smith where to take it, dependingon circumstances.

Jones can handle Mrs. Smith's ra-dio, as he happens to be a qualifiedG. E. radio service shop, besides be-ing the local appliance service center.If this were not the case, he wouldsublet the radio repair job to an-other qualified G. E. shop.

Rebuilding of sealed refrigeratorunits requires factory equipment,

and this job is too big even for theregional appliance service centers.This kind of job is handled by fiveG. E. -owned factory rebuilding cen-ters in operation in Long IslandCity, N. Y., Cleveland, Schenectady,Kansas City and San Francisco.

Following the principle of "re-stored service" only for the duration,G. E. is asking its qualified localservice centers not to sell parts un-less the parts are necessary for theoperation of an appliance. Everyeffort will be made to prevent a runon parts. No consumer will be en-couraged to keep on hand spareparts, for only by using such partsjudiciously can essential "restoredservice" be maintained.

Dealer -Helps

Compact folders and a booklet in-tended for appliance users, givingcommon-sense suggestions for keep-ing appliances in good working or-der are distributed to dealers foruse in conjunction with the serviceprogram. In preparing these leaflets(see illustration) G. E. enlisted theaid of home service editors of na-tional magazines, advertising man-agers of several central stations andhousewives themselves. This pre-tested literature is designed to helpcustomers avoid making unnecessarycalls on the service dealer and, onthe other hand, to encourage servicecalls in place of amateur tinkeringwhen such a call is advisable.

The policy is to have the customerbring the smaller appliances to the


In "handbag" folders the consumer is urged to "call your dealer for service."Below and on facing page, expert appliance servicemen at work in one of thenew G.E. appliance centers. Each center serves as a pool of hard -to -getreplacement parts and also amplifies repair facilities of service dealers.

0 0 06000V 1200V 3V. TO 600V

V.T. V. M.

Tee/mewl 5e)wiee?°We'el.er

TEST EQUIPMENT CIRCUITS -Part I

Through the cooperation of test equipment manufacturers we arepublishing a series of hitherto unavailable schematics of their in-struments. The circuit diagrams will be published without technicalcomment in a series of "Portfolios" of which this is the first. Sub-scribers desiring publication of circuits for specific instrumentsshould write to Editor, Radio Service Dealer, for issue priority.

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Data presented as "Shop Notes", contributed by service -dealers as a re-sult of practical experience, is carefully considerd before acceptance.We believe it correct but we assume no responsibility as to results.

' CARD I

STROMBERG CARLSON 10 AND 11

The Stromberg Carlson 10 and 11 use special int r -stage audio transformers to couple a screen grid detrac-tor to a pair of 45 grids. A hum balancing arrangemosntrequiring a split secondary is used. Under present con-ditions a replacement transformer of that type may notbe obtainable, but a substitute can be used if the humbucking circuit or balancing arrangement is changedslightly. The centertap of the secondary is connectedto B. and a 25 ohm wire -wound potentiometer is usedfor balancing. If the hum is very loud, additional ca-pacitance can be added to the filter system. The valuerequired can be determined by experiment on individual

CARD 2

.,LACES I. WU

SERIES CONNECTION OF ELECTROLYTICS

When connecting electrolytics in series, choose capaci-tors of the same voltage and capacitance rating and parallelthe capacitors with an inter -connected resistance- voltagedivider in order to insure equal distribution of voltage

Figure 1.Figure 2.

sets of this type. The original circuit is shown in Fig. 1and the modification in Fig. 2.

Submitted by Willard Moody

between the capacitors. The resistors should be of the fixedcomposition type with a resistance tolerance of not greaterthan 10 per cent. Make sure that the wattage rating of theresistors is high enough to provide an adequate safetyfactor against damage from overheating. A typical arrange-ment used in replacing an 8 mfd., 600 -volt peak, wet elec-trolytic by two 10 plus 10 mfd., 450 -volt units is shown inthe diagram.

CARD 3ZENITH 1 OB1 ; 1082

Set is dead on manual broadcast, otherwise OK. Troubleis usually in fixed compensating condenser in automatictuning assembly which may be grounded to set frame. Theremedy is to remove the assembly cover and dress barelead away from the frame.

-From Zenith Service Hints

CARD 4REPLACING WET ELECTROLYTICS AND HIGH

SURGE DRY ELECTROLYTICS

Properly installed miniature size capacitors can replacewet and high surge voltage dry electrolytics in practicallyall receivers. To insure satisfactory operation, the circuitsurge voltage must not exceed the surge peak voltage ofthe replacement capacitor (525 volts for 450 volts work-ing). In many cases this means series connection of re-placement capacitors.

To determine the circuit surge voltage, temporarily re-place the faulty unit by a 1 or 2 mfd., 600 or 1000 -voltpaper capacitor. Then connect a 1000 ohms/volt or higher

Courtesy, Solar Capacitor Sales Corp.

CARD 6EMERSON FU427

To correct a bad howl when the volume control isturned down, replace the 40 mfd. 25 -volt condenserwhich is mounted below the main filter. Intermittentoperation may be caused by a defective main filter(20-20-150).

Submitted by Spears Radio Service.

resistance voltmeter across the capacitor. Watch the meterpointer as you snap the set switch. The surge voltage is thevoltage at which the pointer hesitates after its first swingbefore beginning a relatively slow decrease to operatingvoltage as the set warms up. This test should be madewith the highest line voltage which may occur in the loca-tion where the set will be used.

If the surge voltage is too high for a single miniatureunit, connect units of the proper capacitance and voltagerating in series to serve as the replacement.

Dry electrolytics with a capacitance as low as two-thirdsof the original capacitance will usually be found satisfac-tory when replacing wet electrolytics.

Courtesy, Solar Capacitor Sales Corp.

CARD 5FORMULA FOR SOLDER

In replacing bypasses and filters in older models ofMajestic and Grunow radios, I find that practically allof them were made of tin foil. By saving this tin foiland melting it down and then mixing it with clean softlead in the proportion of 6 parts tin to 4 parts lead, Iobtained excellent solder for radio work. I cast thesolder into sheets 1/16 -inch thick and cut it into nar-row strips. It should be used with soldering paste. Caremust be taken not to overheat or burn the solder whilemelting it.

Submitted by E. C. Entler

CARD 7AUTO RADIO SNAGS

If the noise of the motor is heard only when the cowlantenna is above the roof level of the auto, place an.00008 condenser between antenna and ground.

If the set reception fades while in the car, but checksfavorably on bench test-mere alignment will not help.Replace the OZ4 tube and the fading usually will becured.

Submitted by Leon Stein,Mount Vernon, N. Y.

September, 1944 19

The MULTI -TESTERby OSCAR E. CARLSON

HOW multi -range meters are de-signed. constructed & operated.

PART I

ELECTRICAL instruments, ormeters, are older than the elec-tron theory and come from a

long chain of inventions. The in-ventor of the dial and pointer, soprominent on early sun -dials, is lostin antiquity. Springs and jewels areof more recent development. TheNuremburg Egg, a watch, used amainspring and was made in about1500 A.D. by Peter Hele, of Nurem-burg.

A patent was granted to threeEnglish watch makers in 1704 for"jewels to pivot holes of watches andclocks." The inventor, NicholasFacis, was originally a native ofSwitzerland.

The D'Arsonval, a moving coil per-manent magnet type of instrument,had a succession of evolutionizingdevelopments from 1850 to 1888,when Weston gave us the modern in-strument which has seen little basicchange since then.

To understand more fully the useof the instrument which is the foun-dation of nearly all of our modern"Multi -Testers" and D.C. instru-ments, we must first review somefundamentals.

ELECTRIC AND MAGNETICFIELDS

It is common knowledge that theearth revolves around the sun be-cause of the pull of gravity. Thisgravitation is a field of force, orsphere of influence, attracting theearth to the sun, even though nopsysical bonds connect them.

You will remember that a simpletwo -plate capacitor, or condenser, hasa difference of potential between thetwo plates when charged. This dif-ference of potential manifests itselfby a dielectric field of force, oftencalled the "electro-static field," or"electric field." This field is visual-ized as dielectric lines radiating fromthe plates of the capacitor throughthe dielectric which contains thecharge. In drawings, the number of

lines indicate the field intensity. Ar-rowheads on the lines are used to in-dicate the direction of the field. Thisis the direction in which a small,positively charged body would bemoved if placed within that field.This is shown in Figure 1.

Figure 2 illustrates the directionof the lines of force for three con-ditions. Part (a) shows the linesof force around both a positive anda negative charge; part (b) showsthe lines of force between two adja-cent but oppositely charged par-ticles; part (c) shows the lines offorce between two adjacent but sim-ilarly charged particles.

An impressed voltage always pro-duces an electric field proportionalto the voltage strength. What wethen term voltage may be consid-ered the manifestation of an elec-tric field.

We are all familiar with the factthat a "magnet" can attract a pieceof iron or steel through space. Theremust then be a field of force betweenthe magnet and the iron or steel at-tracted to it. We call this field offorce the "magnetic field of force,"or more simply the "magnetic field."

Figure 1.

We have also seen that an impressedvoltage always produces an electricfield that is proportional to the im-pressed voltage. Now, a flow of cur-rent always produces a magneticfield, the strength of which, in air, isproportional to the strength of thecurrent.

Fundamentally, what is termedvoltage is there only because the elec-tric field manifests itself as voltage,and perhaps what is called current isthere only because the magnetic fieldcauses a phenomenon that has beentermed current. Strictly speaking,electric energy is not carried by volt-ages and currents; it is carried bythe electric and magnetic fields inwhich the energy is stored.

We have learned that a movingelectric current sets up a magneticfield. In Figure 3 are illustrated themagnetic lines of force around awire which is perpendicular to theprinted page and through which elec-trons are flowing from the rear ofthe page toward the front. Whentwo wires are side by side suchthat electrons, or current, throughone move in the opposite directionfrom the other, the resultant mag-netic lines of force are as shown inFigure 4. Here the current is flow-ing from the back of the pagethrough the wire labeled (-) andback to the rear of the paper throughthe wire labeled ( + ). Current flowis herein taken to be the same aselectron flow, from negative to pos-itive.

If we now take a wire carrying anelectric current and form it into ahelix, we will have what is termeda coil, or inductance. The lines offorce will then be concentrated asshown in Figure 5 so that the coilbecomes an electro-magnet with anorth and a south pole. It is to beremembered at this point that likemagnetic poles repel each other andunlike magnetic poles attract eachother.

When a wire carrying current liesin a magnetic field, the wire experi-ences a force tending to push it out

Figure 3.


orVIII

"Au-MAGNETIC LINES OF FORCE BETWEEN TWOPOLE PIECES OF PERMANENT MAGNET.

CONDUCTOR THROUGH WHICH NO CURRENTIS FLOWING IS IN GAP BETWEEN POLE PIECES.

DIRECTION OF FORCEON WIRE

"B"- DISTORTED FIELD CAUSED BY CURRENTFLOW IN THE WIRE. FIELD STRENGTHENS

BELOW WIRE, WEAKENS ABOVE WIRE.

Figure 6.

of the field. In Figure 6. (a), a wireperpendicular to the page lies in amagnetic field between the polepieces of a permanent magnet. Nocurrent is flowing through the wireand the magnetic field is undis-turbed. In Figure 6(b) electronsare flowing through the same con-ductor from the rear of the page.Then a magnetic field is set up aboutthe wire as indicated and the result-ant field within the areas bounded bythe pole pieces of the permanentmagnet will be distorted. On the

bottom of the wire the fields of themagnet and the wire are in the same -direction and thus add together. Onthe top side of the wire they areopposing each other and thus tendto weaken the field in that direction.The wire will thus tend to move up-ward in the direction indicated bythe arrow.

If this wire, in coil form, werenow pivoted so it could not moveout of the field, a torque would beapplied to it, tending to rotate itwithin the field. Figure 7 illustrates

"A"- LINES OF FORCE AROUND ISOLATED POSITIVE & NEGATIVE CHARGE

-<.--(111=0 0"B" -LINES OF FORCE BETWEEN ADJACENT "C" - LINES OF FORCE BETWEEN ADJACENT

BUT OPPOSITELY CHARGED PARTICLES BUT SIMILARLY CHARGED PARTICLES

Figure 2.

Figure 10.

such an arrangement where the coilmakes up a electro-magnet whichmay rotate no more than 180 de-grees, for at that point unlike polesof the magnets would face eachother.

Thee amount of motion imparted tothe pivoted coil is proportional to thestrength of the opposing fields or tothe strength of the current flowingthrough the coil. We have here thena current -indicating device whichmay be made into the conventionalD'Arsonval type D.C. meter, with theaddition of jeweled bearings, point-er and dial, and spring tension tolimit the angle of rotation. Figure8 shows this arrangement.

The reader is aware that the wiremaking up the meter coil offers someresistance to the flow of current andconsequently there is a voltage dropacross the coil. A meter is so de-signed that for full scale deflectionvalue of current the resistance of themeter is small compared to the cir-cuit resistance so that insertion ofthe meter in the circuit does not ap-preciably alter circuit conditions.

To measure current flowingthrough a circuit, that current mustflow through the meter. Consequent-ly the meter to measure current isalways placed in series with theother circuit elements. This isshown in Figure 9.

Now let us suppose that with ameter designed so that the currentfor full scale deflection is 1 ampere,


September, 1944 21

CIAS57.0/7Records and Record Makersby L.C.S.

Young stars are coming in ... MarthaStewart, radio and pix singer ... DavidStreet, tenor in radio's 'Joan Davis -Jack Haley "Village Store" program ...both, to Victor. Discaster Dinah Shore. . . in London, import pin-up by re-quest of the boys abroad. Army ServiceForces Music Section has Perry Comorecording his air program .. . "For theRecord" . . . on "V" discs for overseasshipment. Lena Horne takes them overat Chicago's Chez Paree . . . and manya tune is jazz arranged for her byFletcher Henderson's brother Horace. . . her arranger and music director.Blue's "Music America Loves Best"takes on more jazzo features . . . MelHenke pianos and Adele Girard harpsfor the public . . . following the recentDuke Ellington and Cozy Cole discs.. . . orchestra and chorus by Jay Black -ton. Spike Jones spiked chimes withcowbells in his antique grandfather'sclock . . . not enough spirit to ordinarychimes . . . now Spike is happy everyhour on the hour.

Duke Ellington . . ., was thieved -outof five saxes, five clarinets and a trumpwhile in Canada . . . on last day man-ager Al Calley got a phoneful aboutthe whereabouts of the wherewithals-and found them safely right outside thedoor. Vaughn Monroe and his band geta new chirp while on at the MillionDollar Pier in Atlantic City . . . Mari-lyn Duke, replacing Del Parker. SpikeJones puts a spoke in his own wheel. . . released by Bob Burns to programon his own . . . with the City Slickers,

Gloria de Haven, from pix "Step Lively"which features Frank Sinatra, singing"And Then You Kissed Me." Who didwhom?

of course. Tommy Dorsey's success al-bum . . . names he helped make . . .

Frank Sinatra, Jo Stafford, the PiedPipers, Connie Haines, others . . . in"Tommy Dorsey, Starmaker" (Victor).Dinah Shore writes her experiences withthe armed forces . . . for army hospitalpublications, by request. Bonds andTies went over big for Sammy Kaye. . . Sam's tie was auctioned off in frontof Times Square's cash -registered FifthLoan drive . . . fetched a cool $1,000. . . for which Sammy offered the bid-

,,. :' 6

Mister Jimmy (Inka Doo) Durante t'rows up his hands for mamas, pistol -parkin'.

der choice of his 350 cravat collection.. . . Kaye will also give away 500 auto-graphed batons to promote war bonds. . . it's his famous "So You Want toLead A Band" theatre stunt.

Dinah Shore . . . entertains service-men somewhere in Europe . . . and re-turns in time to start her new NBCspot in October. New recorder MarthaStewart . . . in first "Music AmericaLoves Best" NBC show, with SigmundRomberg . . . Future shows will havetop pop-discers Vaughn Monroe, DukeEllington, Dinah Shore, Charlie Spivak,Lena Horne, Mel Henke and DavidStreet . . . this is a sho-sho show. GeneKrupa, the beat -all drumster, with band. . . to pix for RKO. Paul Baron will'air -debut Phil Moore's cross section

Ginny Simms . . Sings

sketch of musical America today . . .

"Species Americana." Freddy Martin. . . back in Cocoanut Grove, Los An-geles, with band.

Fred Waring is Roxying in New York. . . Jerry Wald is at Paramount, sameplace . . . Russ Morgan is in Berkeley,Cal. . . . Glen Gray performs in Denver.Shep's new field piece is swing -tune hecalls the "Copa-Boogie." . . . That'scopa-aing with the situation, eh?

Records to SellRCA -Victor:

Vaughn Monroe and his Orchestra(20-1591) in "Hawaiian Sunset," writ-ten by Sammy Kaye and sung by bari-tone -leader Monroe. Coupling is a corn-

(


SPRAGUE TRADING POSTA FREE Buy -Exchange -Sell Service for Radio Men

* FLEXIBLE

*HEAT-PROOF

TO 1000°C.

* LARGERWIRE SIZES

is a radio serviceman, no one has to tell you that a wire wound1..tor is no better than its insulation-or that that is why Sprague

Koolohm Resistors are "tops" by any test you care to name.Koolohm ceramic insulation is applied directly to the wire and theassembly is then DOUBLY protected by an outer ceramic tube. Kool-ohms operate so cool you can use them at full wattage ratings. The,are highly resistant to both moisture and heat. They give you higherratings in smaller sixes. KOOLOHMS will not let you down!,

FOR SALE OR TRADE-Superior 1230AC sig. generator with audio frequency,in portable metal case; 200 -watt, 80cycle AC generator for mobile sound sys-tems or AC equipmeeiat: 0-1 100 ohm DCmilliameter; 0-5 Weston DC voltmeter;Webster theatre type 15 watt sound sys-tem. Want 35 MM films, sound prefer-red, all subjects; also record changer.any condition. J. L. thyself. 1480 S.108th St., Milwaukee 19, Wisc.

WANTED-Low power phono-C.W. Trans-mitter, 50-100 watts. Also Jenson 10"P.M. speaker. Lt. John H. Parrott, Box288, Shaw Field, S. C.WILL TRADE -240Z4 for 12 series, 35series, 50 series, or what have you?Woolf Radio Service, 389 O'Farrell St.,San Francisco 2. Calif.

WANTED-Radio City 310C tube testeror equivalent. $25 top price. W. B. Cox,Rt. #3. Anson, Texas.FOR SALE-Universal 8 MM camera inoriginal box, $10. Want new 12v. tubesor higher; also N.G. phono crystals-must be in one piece. Stein, 7 MonroeSt.. Mt. Vernon, N. Y.URGENTLY NEEDED -25B8 tube; alsotube tester to handle all tube types.Leyden Radio Sales & Service. 9651Franklin Ave., Franklin Park, Ill.

WILL TRADE -117L7 tube for urgentlyneeded 12K8. A/C Robert F. Chambers,Class 44J-Major's Field, Greenville, Tex.

FOR SALE -2 Weston meters-#301 0-5voltmeter, and #506 0-20 milliameter.Gerald VanAusdal. 320 West Vine street,Oxford, Ohio.

WANTED-Superior multimeter #1250;also #1230 sig. generator. Ed. kiadden,Box 11, Montrock, Ontario, Canada.

URGENTLY NEEDED -3:1 Push pullaudio transformer; also 25A7. 12A7,35Z5. 3524, and 35Z3 tubes. F. M.Crawley, ART 3/C, U. S. Nano Bks.#2, Ward Island, Corpus Christi, Texas.FOR SALE-Supreme 571 sig. generator,$95: Supreme #585 diagmeter. $80;VTVM, $35; output meter with 8" Wes-ton, #14 meter, $25; Superior #1280.$21; 150 new tubes at list; Gen. Indus-tries phono motor and 12" table. 78R.P.M., 60v, new $20. Crooks RadioService, Box 94, Kent, Ohio.

URGENTLY NEEDED-Battery elimina-tor to test 1.5 v. battery radios on 110v.,A.C. current. Carl W. Wells, RadioShop, Frost. La.FOR SALE-Paper and mica condensers,resistors, volume controls, transformers,

course, 90 books, power pack,power xformer, 2" speaker tubes. GeneLesko. P. 0. Box 510, Bristol, Penna.

WANTED-lIallicrafters SM-20R car-rier level meter. Roger D. Lane, Man-sion House, Greenfield, Mass.

WANTED-Al electronic V -O -M or 25,-060 ohms per v. multi -tester, for cash-or part cash and a few hard to gettubes such as 12SA7, 12A8. 35Z5, etc.,or new Shure crystal microphone, D.Bowen, 935 S. Rampart blvd., Los An.geles 5, Calif.

URGENTLY NEED ED - 1LA6, 1LB4,1LN5, 1LH4 tubes; also 2% meter tran-scriever, and old Confidence tube checker.Benjamin Peyton. 3306 Arch St., LittleRock, Ark.

FOR SALE -350 good used tubes, manypopular types 25c each. Minimum order83.00. Specify second choice. Also newstranded rubber covered twisted trans-mission Wire for all wave receivers, $1.50per hundred feet. Send no money withorders lint Il acknowledged. Baldwin

Radio Service, 13 Fulton Ave., JerseyCity 5, N. J.WANTED FOR CASH-Sweep frequencymodulator, for use with RCA #155oscillograph; also 35Z4- 5 or 6. 351.6,50Y6, and 50L6 tubes. Can trade othertype tubes, also RCP #308 portabletube tester with all sockets. J. J.Schwarz, 1366 Greenleaf Ave., Chicago26, Ill.

WILL SWAP-Almost new 6.3v -5v- 600-0-000v 200 mil. transformer for a 475-0-475v transformer with same filamentvoltages. Must be perfect. Will trade 30caliber pre -1900 German Mauser semi-automatic pistol. Want SX-24 or SX-25or similar receiver. Frank Williams.W6ULE, 748 Glenview Road, Glendale2, Calif.

FOR SALE-Clough Brengle oscilloscope#CRA and sig. generator OM. Both per-fect with instructions and charts, $110.M. R. Wright, Box 861, Rawlins, Wyo.WANTED-Up-to-date tube tester andcondenser analyzer. What have you?Radio Electric Appliance Co., Ill EastMain St.. Lancaster, Ohio.WANTED-Multi-match 40 -watt trans-former, Thord. T17 M59 or T11 5174,or any modulation trans., crystal ormagnetic cutting head. Joseph A. Stauhs,159 N. 15th St., Bloomfield, N. J.

WANTED -1935 Superskyrider; must nothave any damaged components. Also,'37-'38 RSR Super Clipper, 7 tube pre -selector model. M. F. Kelley, ChurchSt., Grenville, N. Y.FOR SALE-RCA oscillograph, THY122-B; RCA frequency modulator TMV128-A; RCA test oscillator #TMV 97C;Weston tube checker, #770. Chas. E.Gravel, 158 Charlton St., Southbridge,Mass.

FOR SALE-Tubes-tend for list. WantE-200 Precision sig. generator in A-1condition; also jr. or senior RCA voltoh-mvst. Ward Lantis. 111 Shelby St.,Kingsport, Tenn.

FOR SALE-Brand new Motorola FMconverter; also Hallicrafters recorder SX28 and Jensen 12" speaker and base re-flex cabinet-both perfect. Shumaker andEvans, 6 Washington Square, Newport,R. I.

WANTED-Efficient. moderately pricedtube tester. John W. Butler, 424 Mans-field St., Belvidere, New Jersey.WANTED-Old radio, not necessarily inworking condition, but must be com-plete. Also tubes as follows: 1H5G,1T5GT, 1A7G: 1N5GT, 117Z6GT/G, 351,6,35Z5, 125070T, 1281(7G, 12SA7G, 9002,9003. Frank Ura, General Delivery,Gooding. Idaho.

FOR SALE-Starrett 6" Vernier calipers,linear and metric scales, case $25: al-most new, Want Hickok 202 AC -DCV -O -M or Jr. Voltohmyst #165. W.MacFarlane Jr., 1138 Palma Ave., Sche-nectady 6, N. T.

WANTED-Good sig. generator and tubetester. I. Rosenstreich, 1667 Washing-ton Ave., Bronx, New York.WANTED-Rider's Manuals VI - VIII- IX - X. General Appliance Repairs,613 N.E. 1st Avenue, Miami 36, Fla.

FOR SALE-Unused Bliley VF1 crystal,3558.5 Kc with polystyrene socket. $5:brush watch case crystal mike withshielded lead and Amphenol 3 pr. metalconnector, $4: unused RCA #9678 in-ertia suspension arm, magnetic pickupand matching trans (used on expensiveRCA automatic changers). $6. P. A.Rosenblatt, P.O. Box 905, Hoboken, N. J.

WANTED-Recording head and turn-table assembly-complete outfit, or lessamplifier. Donald Keever, Box 612, Ashe-boro, N. C.

FOR SALE-Radio business, completestock, incl. good assortment of tubes;volume controls, 7 Rider manuals; ca-pacitors; transformers; radios; pilotlamps; radio chemical laboratory; Solarcap. anal; audio sig. gen.; sig, chaser:test meters, etc. $1750 complete-will notsell anything separately. Askin RadioService. 1107 S. Main St.. Paris, 111.

WANTED-Echophone EC -1 or similar2% meter receiver, and transmitter.Robt. Westf all. The Pines. Woolwich,Maine.

URGENTLY NEEDED-Clough Brenglesig. generator, or equivalent. S.O.S.Radio & Electrical Appliance Service,371% Broad St., Newark 2, N. J.

FOR SALE OR TRADE-Teleplex codemachine, spring wound, with tapes, 3v.oscillator, and electric code machinewith tapes, 110v.. with 110v. separateoscillator. V. F. Michael. 1687 McKin-non Ave., San Francisco, Calif.

WANTED-Inexpensive used radio partsfor experimental and repair purposes.Kenneth Parish, Mt. Sterling, Iowa.

FOR SALE-Radio and electronic in-struments and supplies. Also need someunits-what have you? J. J. Trowbridge,7936 Parnell St., Chicago 20, Ill.

FOR SALE OR TRADE-Shure ultra701A crystal mike and new G.I. R9OL2 -speed home recording unit. WantHickok 188X or 188 sig. generator andHickok 202 V.T.V.M., for cash or trade.E. H. Abel, 1320 Granada Ave., SanDiego 2, Calif.

FOR SALE -200 new tubes in sealedcartons, O.P.A. list, and 200 perfecttubes (test O.K. and guaranteed) at30% off O.P.A. list. What do youneed? II. Mason Radio, 114 E. 3rd St.,Mt. Vernon. N. Y.

FOR SALE-Stetchell-Carlson aircraftradio. RCA electronic control, large

. quantity 5Z3 and other tubes. parts.cabinets, etc. Carnegie Radio Co.. 3133Carnegie Ave., Cleveland 15, Ohio.

- YOUR OWN AD RUN FREE! -This is Sprague's special wartime advertising service to help radio

men get needed parts and equipment, or dispose of radio materialsthey do not need. Send your ad today. Write PLAINLY-hold it to 40words or less. Due to the large number received, ads may be delayeda month or two, but will be published as rapidly as possible.

Sprague reserves the right to reject ads which do not fit in with thespirit of this service.

HARRY KALKER, Sales Manager.

SPRAGUE PRODUCTS CO., DEPT. RSD-94, North Adams, Mass.(Jobbing distributing organization of products manufactured by SPRAGUE ELECTRIC COMPANY)

SPRAGUE CONDENSERSKOOLOHM RESISTORS

Obviously, Sprague cannot assume any responsihility, or guarantee goods, services, etc.. which might be exchanged through the above advertisements

TRADEMARK REC. I'. S. PAT. OFFICESeptember, 1944 2:1

Records( from page 22)

plete contrast, "Take It, Jackson,"-ajitterbug number with the stomp onrhythm and instrumental riff.

Artie Shaw and his Orchestra (20-1593) gives the maestro a clarinet-tootin' in "Don't Take Your Love FromMe," plus a vocal by Lena Horne. "ItHad To Be You," is a swinger, withbrass and sax against a background ofstrings.

Reports of orders for several milliondiscs have been placed for reinstated118 Victor tunes . . . Don't overlookJohnny Hodges torrid Bluebird coupling

of "Passion Flower" and "Going Outthe Back Way." Johnny is a favoredinstrumentalist with Duke Ellington'sorchestra, and his discs always do well. . . Another good seller, Dina Shore's"Together" and "I Learned a LessonI'll Never Forget" ... another all -vocal.This chorus is unusual ... sings orches-tral type arrangements, with voices im-itating muted brass, organ, etc. . . .

one for the "live" self-service bin.Columbia:

Ginny Simms (36731) sings a newcoupling, "I'm Glad There Is You" and"Chinese Lullaby." Proof again whythis handsome gel is going over big-a sure seller for disc -hungry dealers.

Harry James and his Orchestra

AFTER THE WAR - - - the name to look for

in RADIO ANTENNASToday, BRACH produces only for Victory. But after thewar, Brach will be ready with trained craftsmen and stillmore "know-how" to turn out superior antennas andother radio and electrical products for which dealers andpublic have been patiently waiting.

L. S. BRAM IIFG. CORP.World's Oldest and Largest Manufacturers of Radio Antennas and Accessories5 5-6 5 DICKERSON STREET NEWARK N. J.

(36279) in "Estrellita" and "My Be-loved Is Rugged." Harry solos on histrumpet, and there's a full orchestralbackground and a chorus or two of thelyrics. Looks like a favorite with jukes.

Jimmy Durante (36732) schnozzlestwo numbers as only this buffoon can:"Inka Dinka Doo" is close to the No. 1novelty, and funny besides. "Hot Patat-ta" gives out with Jimmy's line withthe gels-a lesson in luvv. Swell stufffor a lift-for customers and dealersalike.

Decca:Glen Gray (18615) and the Casa

Loma Orchestra in "Don't Take YourLove From Me" and "Forget-Me-NotsIn Your Eyes." Fox trots with vocalchorus by Eugenie Baird.

Tiny Hill and his Orchestra (4447)in which Tiny vocalizes, "How ManyHearts Have You Broken?" and "Roseof Santa Rosa." Both are fox trots.

Dick Haymes and Helen Forrest(23349), the popular singing team, in"It Had To Be You" and "Together."The first is from RKO pix "Show Busi-ness"; the flip from Selznick pix "SinceYou Went Away." Victor Young andhis Orchestra furnish backgrounds.

Classic:The Barry Sisters offer four selec-

tions on two discs. 7103-"My MamaTold Me" and "Babylon." 7104-"Don'tKeep Me Guessing" and "Kotareena."Both discs are popular re -recordings,and the Barrys give them a full, broadtreatment.

The Three Suns (7105) give "I'm Al-ways Making Believe," from 20th Cen-tury pix "Sweet and Lowdown." "YouAlways Hurt The One You Love" iswith vocal refrain by Artie Dunn.

Josephine Houston (1009) withClassic Concert Orchestra in "TheLord's Prayer" and "Reverie." The firstties in with the singing of the "Prayer"following the President's D -Day prayeron the radio. The same singer does therecording.

Capitol:Stan Kenton (166) and his Orchestra

with Anita O'Day vocalizing a jive ditty,"Her Tears Flowed Like Wine." Thecoupling is a ballad, "How Many HeartsHave You Broken?" which sports aslick vocal by Gene Howard.

Benny Carter (165) presents twoballads, "I'm Lost" and "Just a Baby'sPrayer at Twilight." Benny's alto saxglitters on both sides . The first is vocal-ized by Dick Gray, the over, by Savan-nah Churchill.

Continental:Music Appreciation Records include

classical selections on 10-inchers, atnominal prices. A series of special 10 -inch albums includes "Treasures ofTchaikovsky" ( A 3 0 0) ; "Brahms"(A301); "Schubert" (A302); "Dvorak"(A303) and "Beethoven" (A304). Theselections have lasting interest foryoung and old, the prices are in themoderate bracket.


The following is quoted from a letter marked "Somewhere in Libya"signed by an Officer in an AACS Group, USAAF: -

"The writer just spent a year in Persia. Most of the time along thePersian Gulf where it really gets HOT ! We operated one of yourHT -4-B Transmitters near a place called Abadan. The transmitter per-formed very satisfactorily under the most unfavorable conditions. Idoubt that your engineers ever dreamed that one of your rigs would becalled upon to perform in a place where for 5 days and nights the tem-perature never dropped below 117 degrees and in fact it got up to 134

degrees during the daytime, that is "in the shade" temperature, thehumidity was high and the air salty. Actually the transmitter got muchhotter than that as it was installed in a brick building and no air condi-tioning, not even an exhaust fan. The HT -4-B was used on voice andgave very little trouble. One day the piece of bakelite under the phone/cwswitch caught on fire but this was easily repaired. During the so calledwinter season, the temperature actually got as low as 36 degrees one day,we had a little trouble with mice crawling under the rig, which was set

up on two 4x4 wooden sleepers. It seems the mice liked the heat andthey would crawl up under the transmitter and get lodged in betweenthe rectifier sockets and the frame when the operator switched on thetransmitter the mice would fry, usually a fuse would blow but no otherdamage was done We never did figure why the mice liked the Halli-crafters best. There were several other transmitters in the room but theyalways seemed to pick the HT -4-B; guess they were pretty smart mice!"

Just one of hundreds of real life experiences of Hallicrafters equipment.Out of this valuable experience will come your peace time short wave radio.

*BUY A WAR BOND TODAY!

Win -afters RADIOTHE HALLI.CRAFTERS COMPANY MANUFACTURERS OF RADIO AND ELECTRONIC EQUIPMENT CHICAGO 16, U. S. A.

_

Septeinber, 1944

Multi -Tester(from page 21)

SOUTHPOLE

1,

------- - .1(

NORETHPOLE

Figure 5.

we wish to measure currents up to10 amperes. Our object then is toallow 1 ampere to flow through the

meter when 10 amperes flow in thecircuit. Obviously, since the metermust be in series with the circuit,we must by-pass, or detour, 9 am-peres around the meter. That meansthat our meter will be made onebranch of a parallel circuit as shownin Figure 10. If 9 amperes are toflow through the parallel resistor, orshunt, when 1 ampere flows throughthe meter, the shunt must have 1/9the resistance of the meter resist-ance. For any shunt resistor thenwe may use the formula:

Rm(1) Rah -

(K-1)where Rm is the resistance of themeter and K is the desired currentrange/original current range.

Photo Cintrty Pas /merle. lbwevr

NEYElectito-gize

Model 600-D th'it",fis VCDO L

COMMUNICATIONMICROPHONE

(REPLACING MODEL 600-C)

FOR MOBILE RADIO TRANSMITTERS AND SOUND EQUIPMENT

Resistant to high humidity, wide temperature ranges, mechanical shock andvibration

Frequency curve scientifically designed for highest articulation through inter-ference and background noise

The new Electro-Voice Model 600-D is available in high or low impedance output

Lightweight, can be held for long periods without fatigue

Shock -proof, high impact molded phenolic case

Press -to -talk switch (switch -lock optional) for relay operation, with choice ofswitching circuits

To the growing list of Electro-Voice developments, we nowcad the Model 600-D which may be adopted too numberof iol civilian applications. Built to rigid wartime speci-fications, it reflects the painstaking core of the Electro-Voicedesign laboratory. Electro-Voice Microphones serve you better.. for longer periods of time.

If your present limited quantity needs can be filled byany of our Standard Model Microphones, with or with-out minor modifications, please contact your nearestradio parts di 'bider.

PAPER PACKS A WAR PUNCH . . .

SAVE EVERY SCRAP

ELECTRO-VOICE MANUFACTURING CO., INC. 1239 SOUTH BEND AVENUE SOUTH BEND 24, INDIANAExport Division: 13 East 40th Street, New York 16, N.Y.- USA Cables. ARLAB

Figure 4.

VOLTAGE MEASUREMENTFrom Ohm's Law we know that

E = IR. Thus if we know the re-sistance and measure the currentflowing through that resistance wecan compute the voltage, E, shownin Figure 11. To measure D.C. volt-ages with a D.C. current meter weneed only measure current throughsome known resistance connectedacross a source of potential. We mustremember that the meter resistancehas been added to that other loadresistance. We can then use a cur-rent indicating meter together witha suitable series resistor, or multi-jlier, and calibrate the meter scalein terms of voltage for that value ofseries resistor.

Let us assume that a 0 to 1 milli-ampere meter is to be used to indi-cate at full scale deflection a poten-tial difference of one volt across itand the series resistor. The meterresistance is 30 ohms. We can read-ily see that for one volt across someunknown resistor to cause one milli-ampere of current flow through thatresistor, the latter must be 1000ohms. Thus the series resistor mustbe the total resistance, R minus themeter resistance, Rm, or 1000 - 30,

PIVOT

Figure 7.

or 970 ohms. We say then that themeter and series resistor look like1000 ohms for a full-scale deflectionof one volt. But, if we wish to meas-ure 10 volts full scale, Rt must be10,000 ohms. The meter and seriesresistor still offer 1000 ohms resist-ance per volt of calibrated full-scaledeflection. This is then a 1000 -ohm -per -volt voltmeter. Our requiredseries resistance may be made equalto Rt, since Rm is negligibly small.Thus for every desired value of full-scale deflection voltage we need onlymultiply the desired full-scale deflec-



* * RCA LEADS THE WAY *

HOW TO ATTRACT

RUENEMPE

YOUR WAY

PREFERRED

TYPE

41,N

11a

11\

S

Irktratm

oft

poe TUBES'RCA DEVELOPEDAND INTRODUCED

MORF TutiESON rk7

JOINT ARMY-NAVY

PR RRRRRlb L/ST

OF VACUUMTURES TJTAN

ANT OTHERMANUFACTURER

THAT'S easy...just put up this sign now. Naturally, therewon't be any Preferred Type Tubes to sell till after the

war, but it's not too soon to let people know where theycan come to get them when they are available.

This is the latest step in RCA's continuous pFogram ofmerchandising to support RCA distributors, dealers andservicemen during the war. Pre-war, many up-to-the-minuteRCA sales aids helped you sell and expand your markets...displays, indoor and outdoor signs, RCA clocks, and manyothers. After V -day, look for an even greater RCA merchan-dising service to direct sales your way.

Meanwhile, hard-hitting RCA advertisements in top maga-zines are doing the same job ... building toward an evengreater radio and electronics business for you after the war,

And this display, now available to you, helps set the stagefor a profitable postwar boom in your sale of RCA PreferredType tubes.

Remember, the Magic Brain of all electronic equipment is aTube ...and the fountain -head of modern Tube development is RCA!

New, full -color 40 -inch by 26 -inch display easel (shownhere in black and white) to help you maintain your identi-fication with RCA, and to sell the Preferred Type Idea-..which means greater profits for you in the future.

Bey Mo"

WAR BONDS

62-0731.1,

'1111111111.1111111."

RADIO CORPORATION OF AMERICARCA VICTOR DIVISION CAMDEN, N. J.

LEADS THE WAY... In Rad ... Television ... Tubes ...Phonographs ... Records ... Electronics

September, 1944 27

Multi -Tester(from page 26)

tion in volts by 1000 to get the valueof the total series resistance.

For any desired full scale deflec-tion voltage:(2) R., -R, X

New voltage range -1

Old voltage rangewhere R. is the added series resist-ance necessary to increase to the newrange. R. is the number of ohmsper volt required to limit fullscale

Designed originally for spacesaving and fine reception inportable radio sets Ken-Radminiature tubes easily adaptedthemselves to walkie-talkie andother military uses Expansionand future progress with thisrugged Little Giant is limitless

cc:big.

for 1° 013:30.

.11tttesoott.xtVe c°eZ/ stekbe002''too

28

Figure 9.

current to that of the meter rating.Thus if a 0 to 1/2 milliampere me-

ter is used, R, is equal, for formula(2), to 2000 ohms per volt. A 100

KENRADEXECUTIVE OFFICES

OWENSBORO KENTUCKYEXPORTS II 1110.0RE STREET NEW YORK

TRANSMITTING TUBESCATHODE RAY TUBESSPECIAL PURPOSE TUBES

RECEIVING TUBESINCANDESCENT LAMPSFLUORESCENT LAMPS

volt range would then require a mul-tiplier as follows:

R. = 2000 X [ (100/1) -1]or 198,000 ohms. This assumes thatthe meter had a built-in multiplierresistor, making it a fundamental 0to 1 volt meter. If it did not havethis resistor but was only a straight0 to % milliampere meter with somelow value of internal resistance, R.would be:

(3) R = R. X voltage rangewhere R. is the ohms per volt re-

Figure 8.

quired for full scale deflection forone volt. Thus for the above meterminus the internal multiplier for theone -volt scale, R. for 100 volt scalewould be 2000 X 100 or 200,000ohms.

The calibration of such a combina-tion is straight forward since thevoltage across a resistance is direct-ly proportional to the currentthrough the resistance. Thus fullcurrent through the meter gives thevoltage for which the unit was de-

Figure 11.

signed for full-scale deflection. Half-scale reading represents a voltage ofone-half that which would cause fullscale deflection. Calibration is thensimply a case of multiplying the cur-rent scale by the numerical value ofthe ratio between full scale currentcalibration and the full scale voltagecausing that current. For example,a 0 to 1 milliampere meter has cali-brations from 0 to 1. If used as a100 -volt volt meter, the figure 5 onthe scale represents 50 volts.

(To be continued)Radio Service Dealer

Left-MARINE SPEAKER; approvedby the U. S. Coast Guard, for allemergency loudspeaker systems onships. Re-entrant type horn. Modelsup to 50 watts. May be used as bothspeaker and microphone.

Right-RE-ENTRANT TRUMPET;available in 31/2', 41/2' and 6' sizes.Compact. Delivers highly concentratedsound with great efficiency over longdistances.

Left-RADIAL HORN SPEAKER; a

312 re-entrant type horn. Projectssound with even intensity over 360area. Storm -proof. Made of RACONAcoustic Material to prevent reson-ant effects.

Right-AEROPLANE HORNS; super-powerful and efficient P.A. horns forextreme range projection. 9 and 4unit Trumpets available.

Left-PAGING HORN; extremely ef-ficient 2' trumpet speaker for usewhere highly concentrated sound isrequired to override high noise levels.Uses P.M. unit.

Right-RADIAL CONE SPEAKER;projects sound with even intensityover 360° area. Cone speaker driven.Will blend with ceiling architecture.RACON Acoustic Material preventsresonant effects.

SEND FOR CATALOG

RACON, pioneer and world's largest man-ufacturer of loudspeakers, horns and driv-ing units, is working at capacity fillingdiversified orders - speakers for Army,Navy, Maritime Commission and industrialuse. Now we are planning ahead.

Practically all industrial firms are users,or potential users of some type public-ad-dress, paging or sound distribution system.Statistics prove that a properly plannedsound system installation is a good invest-ment which in time generally pays for itself.

RACONS have always enjoyed a steady,high sales volume. We believe they alwayswill, for our products are the finest that

money can buy, or engineering skill pro-duce. Receiver units supplied with eithermetal or plastic diaphragms. RACON prod-ucts generally cost less than competitivebrands because a lower power -rated andlower -priced RACON will outperform higherpower -rated units of other make. In otherwords, don't let catalog list -prices fool you.Basic costs and rated outputs are the primefactors worth considering.That's why leading sound -men prefer and specifyRACONS, they are depend-able-a safe bet for steadysales and satisfied users.

RACON ELECTRIC CO. 52 EAST 19th ST. NEW YORK, N Y.

September, 1944 29

. . PORTABLE

TUBE CHECKER

Tms portable G -E Tube Checker con-tains sockets for all American tubetypes . . . provides practically a com-plete service shop of tube analyzingequipment. Equipped with the inge-nious PMT Circuit Switch, thisinstrument is just one in the newGeneral Electric line of SERVICE TEST-ING EQUIPMENT.

Among the other sturdy G -E unitsavailable for testing electronic circuitsand component parts are: G -E am-meters, audio oscillators, oscilloscopes,condenser resistance bridges, signalgenerators and other utility test in-struments. For complete details aboutthese accurate instruments, please fillout the coupon below. . . .

FREECATALOG

ELECTRONICSDEPARTMENTGENERAL ELECTRIC CO.Schenectady. N. Y.

Please send, without obligation tome, the General Electric Testing In-strument Catalog, n_ (loose-leaf), formy information and files.NameCompanyAddress

GENERAL ELECTRIC164-C9

Electronic Measuring Insf rumenis

New Servicing Plan(from page 15)

dealer or authorized service centerfor repairs. The bigger appliances,such as refrigerators, ranges, waterheaters, washers, ironers, dishwash-ers, disposalls, electric sinks, consoleradios or bulky table combinationsare inspected on the premises of thecustomer. Repairs are then madewhich do not require extensive tink-ering-as replacing switches or cal -rod units and such. But if the serv-iceman finds the appliance needs ex-tensive repairs, it is taken to theproper service center where it is giv-en an expert overhauling.

How About It,Radio Service Dealers?

A sample of 4,500 typical Americanfamilies were surveyed recently invarious parts of the country by OCRto find out the repair status, age andquantity of about two dozen householdappliances and items of equipment.

Radios-as was to be expected-stand out as the item most in need ofrepair. Although more than half ofthe appliances are five or more yearsold, the percentage found to be in work-ing order ranges from 85 per cent forradios to 99 per cent for several itemsof heating equipment. About 8 percent of radio -owning households havenone in working order. All in all,though, about 28 per cent of the ra-dios in households are in need of re-pairs and servicing, since the begin-ning of the year. With over 50 percent of the domestic radios in currentuse five or more years old, the volumeof orders for repairs and servicing hasbeen greater than could be handled,what with curtailed manpower andshortages in the popular types of tubesand replacement parts. So only about50 per cent of radio set ownerswere able to get needed repairs andservice.

The case is a little different withcertain appliances. Servicing and re-pair was obtained by 70 per cent ofthe families who wanted this work donefor toasters. But only 9 per cent ofthem were in need for repairs. With16 per cent of owners needing repairsfor their vacuum cleaners, more than75 per cent of them had no troublegetting service.

Refrigerators are 95 per cent ofthem in good working order, though63 per cent of refrigerators are fiveyears or more old. Though only 9per cent needed repairs, only abouthalf of these jobs could be serviced.Of the 16 per cent of owners who havetried to obtain washing machine re-pairs this year, about two-thirds havebeen successful.

On this subject, it appears there is nodearth of opportunities for business forradio service dealers. It may take long-er nowadays to handle a given volumeof service and repair business, but thatit is there, waiting for the enterprising,aggressive men in the trade to cash inon, there is no denying. A "master"service plan, now being operated byGeneral Electric through its distributorsand dealers, is described in this issue.Service is "big business."

READYFOR SHIPMENT from

Lafayette Radio Corp.

Chicago or Atlanta

Fractional H.P. MotorFor use in model work,or in any usage where a

small, powerful, slow speed mo-tor is required. Compact, 1/20thhorsepower induction type. lip-erates from 25 to 30 volts AC,

GO cycles. Motor speed 2400 RPM, with geartrain driving 1/4" shaft at 24 RPM. 2"x13/4 x3"overall, excluding shaft1414699. .

. Specially priced, $2.50

RCA FacsimileBroadcast ReceiverRCA MODEL FAX -2AFully automatic pre -tunedhigirfidelity radio receiver,facsimile printer amplifier,facsimile printing unit, andTelechron time switch clock.This instrument has many uses in the labora-tory The printing unit utilizes carbon paper incontact with white paper as a recording me-dium. Complete with tubes and operating andservice instructions, but less recording paper.M25749 $99 50

IRC 20 -Ohm,25 -WattPower RheostatAll metal; die cast aluminumcase Heat uniformly dissi-pated

throughout element.4- Shaft screw driver ad-

justment.149167. 12162- diameter $1.39

Meissner 9" SlideRule Dial. single speedvernier dial mechanism.Fits 3/s" shaft. 5 -band scalecalibrated 5.85-18.2mc,17.6:42mc and 133-406kc.

Includes escutcheon gild bayonet type dial -light sockets. Ratio 17.1M9978 -Type. 23-8230 $4.70

NOTE: All items subject to prior sale

FREE! The country's most valu-able catalog of Radio and Elec-tronic Components and Equipment

. 104 pages packed with items andvalues of high Interest to industry, gov-ernmental agencies, dealers, servicemen, radio schools, etc. The only 1944volume of its kind. Copies are goingfast . MAIL COUPON IMMEDIATELY.-

L7E7YETTE RADIO CORP.901 W. Jackson Blvd.,.

Chicago 7,

Dept. K-9Please

my FREE copy of the

I Lafayetterush ioRad Corporation Catalog I

No 94

NAME ......... ---------

ADDRESS ..... .......................

CI........... STATE.-....

L =10

901 W. Jackson Blvd. 265 Peachtree StreetCHICAGO 7, ILLINOIS ATLANTA 3, GEORGIA

:30 Radio Service Dealer

INSPECTION ON THE LINE

MAKING HISTORY IN COMMUNICATIONS

FOR FINE

ACHIEVEMENT

Inspection before assembly, quality control . . . more than that . . . teamwork from material dispatcher, assembler, inspector, to the girl on thepacking line . . . have made possible the fine achievement representedby the Army and Navy "E" Award presented to the men and women ofthe Universal Microphone Company.

In production of military microphones before Pearl Harbor, Universalhad the necessary "know haw" for immediate war production. Theengineering experience and production efficiency of war production willbe reflected in the electronic voice communication com-ponents offered by Universal to consumers in the future.Until then - BUY WAR BONDS.

UNIVERSAL MICROPHONE COMPANYINGLEWOOD, CALIFORNIA

FOREIGN DIVISION: 301 CLAY STREET, SAN FRANCISCO 11, CALIFORNIA CANADIAN DIVISION: 560 KING STREET WEST, TORONTO 1, ONTARIO, CANADA

September, 1944 31

Trained Seal StuffEx -inspectors from the San Fran-

cisco Signal Corps Inspection Zoneoperating in Los Angeles, have bandedtogether to form a social group knownas the "Trained Seals' Chowder &Marching Club." Their first annual

picnic will be held sometime in October.Frolicsome titles: R. R. Finn is ChiefElbow Bender and Master of theHounds; Sanford Bookee, Chief His-torian and Bail Bondsman; Floyd Ford,Chief Keeper of the Muggs & OfficialFlusher. Dr. Ralph L. Power is per-manent secretary -treasurer.

The result of precision engineer-ing, painstaking production andinherent stamina. This is the bat-tle -tested background you get withevery Cinaudagraph Speaker. Ifdelivery is slow, please rememberthe armed forces have first choice.Watch Cinaudagraph Speakersafter Victory!

Cinaudagraph Speakers, Inc.3911 S. Michigan Ave., Chicago

Export Div., 13 E. 40th St., New York 16, N. Y.

STEEL CABINETS

STEEL

CABINET ANDMEASURING DEVICE

FREE!You

PayFor Belts Only

Now Available with PopularG -C Dial Belt Kits

G -C Woven Fabric Belts are the finest replacements for all sets. Easy to install - no

slipping - no stretching - -

no adjustments. A perfect fitevery time.

Kits Availablewith 25, 50,100, 200 or300 Belts.

Order From YourRadio Parts Jobber

MEN IN THE NEWS

Mallory's Ruben AwardedSamuel Ruben, closely associated

with P. R. Mallory & Co., Inc., for twen-ty years, has recently been awarded aCertificate of Appreciation by the WarDepartment for extraordinary contribu-tions to the war effort.

Among Mr. Ruben's hundreds of in-ventions are a ceramic coated resistor,dry electrolytic condenser (commercial-ized by Mr. Mallory), magnesium -cop-per sulfide a-c/d-c rectifier, quick -heaterA.C. tube, chromoxide insulated magnetwire and ceramically insulated resist-ance wire.

Available fromlocal dealers orby writing fac-tory direct.

VOWSFOR THEASIC/N6\\\II 11

\\0111111/7/0/

iiii\OWIlliffit

-. 11111VIISLL ..O.,*

__#7166 <I WM\

UNIVERSALSTROBOSCOPEThis handy phonograph turntable speed indicator,complete with instructive folder, is now availablegratis to all phonograph and recorder ownersthrough their local dealers and jobbers. As arecorder aid the Universal Stroboscope will assistin maintaining pre-war quality of recording andreproducing equipment in true pitch and tempo.Universal Microphone Co., pioneer manufacturersof microphones and home recording componentsas well as Professional Recording Studio Equip-ment, takes this means of rendering a service tothe owners of phonograph and recording equip-ment. After victory is ours-dealer shelves willagain stock the many new Universal recordingcomponents you have been wailing for.

UNIVERSALMICROPHONE CO.

INGLEWOOD, CALIFORNIA


Sle`io k4e

DEALERS WANT FRANCHISES NOW

Editor:In your July issue in Letters to the

Editor I observed one letter in partic-ular titled "Post -War Dealer." SinceI read every issue of the magazinethoroughly I couldn't miss that letter,and I have also been trying to planmy post-war career as a dealer. Eversince being discharged from the armyand reopening my store -shop, I havewritten to several manufacturers buthave only received one reply and thatone was very unenlightening.

I don't want to wait until radiosand appliances appear in everyone ofmy competitor's windows as I knowthey will be far ahead of me, at thisrate. So if you can get any datasent to me, I will be grateful.

I enjoy very much RADIO SERVICEDEALER, as I have for several years,but kind of lost out while in the army.

Henry A. Neis,Fort Worth, Texas.

Manufacturers are just about gettingtheir plans in shape for post-war. Jobber

and dealer franchises, methods of distri-bution, new or additional lines, markups,models, etc. are being studied. In thisissue we announce Emerson Radio'sP.D.Q. (Preference Delivery Quotas) Planthrough which customers can make sureof early delivery of the radio of theirchoice by signing up with their dealersnow. Among the many news items, Zen-ith's general program for dealers will alsobe found in this issue, and in the Augustnumber, Philco's preliminary plans wereannounced, based on exclusive interviewsby our Managing Editor. By this fall abetter and more complete picture alongthese lines may be announced by themajority of radio and appliance manu-facturers, as news and through trade ad-vertising. RADIO SERVICE DEALER antici-pates that it will carry its share of theseadvertising announcements, plus news ofthe latest developments (as the above, forexample) in its editorial pages.

For the current situation in replace-ment parts and tubes, radio servicemanNeis may be interested in reading "Tubesand Parts," on page 11 of this issue.

MODEL RADIO NUMBERS

Editor :I would like to make a suggestion

to you which I think can help the serv-ice dealer a great deal.

In the past few years it has been'

the practice of most radio receivermanufacturers to neglect to properly

identify the model numbers on the backof radio chassis.

I have run across radios such asZenith, Philco, Emerson, Admiral andothers where it is impossible to findany model number, making it necessaryto waste much time trying to locateservice notes for them.

A note from you to all well knownradio manufacturers, as the servicedealer's representative, may persuadethem to do something about it.

Louis Wexler,Philadelphia, Penna.

Licensing of auto ownership calls forcertain mechanical and physical datawhich manufacturers supply on a metalplate, usually found under the hood. Non -licensing of radio ownership leaves thematter of identifying model types prettymuch up to the manufacturer or assem-bler. When even the least costly radio isa welter of circuits and circuit variations,some method of keying the models foreasy identification in service manuals orinstruction sheets would certainly be aboon to consumers and servicemen alike.RADIO SERVICE DEALER goes on recordright here and now, urging all manufac-turers of radios (whether national or pri-vate brands) to "fingerprint" every oneof their models and their variants so thatservicemen can always identify them. Thiswill help the servicing, the sets will workbetter for longer and give the customersmore enduring satisfaction. All of whichadds up to a good hunk of good -will forthe manufacturer. And how many dollarsthis side of a billion is that worth?

The Publishers of RADIO SERVICE DEALERare proud that over 85% of the Nation's leadingService Dealers are paid subscribers. "RSD"has and will consistently carry exclusive, fact-ual articles that progressive Service Dealersagree are well worth the low subscription priceof $2 for 12 issues or $3 for 24. A few new sub-scribers can be accepted. Tell your associates.Meanwhile, renew your own subscription assoon as you are notified it is about to expire.Cowan Pub. Corp., 342 Madison Ave., NewYork 17, N. Y.

Subscribe NOW to "RSD"A 1 -year subscription to RADIO SERVICE DEALER costs $2.00 -2 -year subscription costs $3.00.

September, 1944 33

Model 504-ATube and Set Tester

The lead honker of the V Flight is prettysure to be one of the oldest and wisest birdsin the flock. Where he leads the others follow.

In the test instrumentfield, too, the leader must have years ofexperience and know-how . . . to pioneernew departures in engineering ... and de-sign . . . and to PROVE them.

Model 542Pocket Muttitneter

That's one of the reasons why Supreme -builtinstruments have done and are doing suchan outstanding job in the V Fight. The expe-rience and research of over 15 years arebuilt into every Supreme instrument.

Model 592Speed Tester

When considering postwar service equip-ment, it will pay you in accuracy, depend.ability, durability and long -run economy, togo along with a leader whose products arepledged "Supreme By Comparison."

SUPREME INSTRUMENTS CORP.Greenwood, mississ4vpi.u.s.A.

In Trade(from page 8)

G.E. Irons This Fall

M. B. Ross, sales manager of thecompany's traffic appliance divisions,announces that two models of electricirons will be manufactured by the Gen-eral Electric Company in its Ontario,California plant under recent OPA andWPB rulings and directive orders.

Both models will be of the automatictype. The majority of the 421,000 irons,which was the quota granted G -E, willcarry a retail price of $8.55, includingtax. The other model will retail at$5.70, including tax. These prices arecomparable to those of prewar models.

Mr. Ross said the new irons will besimilar to the prewar irons manufac-tured by G -E with only minor modifica-tions in the external finish.

It is expected that delivery of theirons will begin in September. Gen-eral Electric's regular distributors willreceive the first shipment based on ironsales of 1940, and dealers will be ableto offer the irons for sale to the generalpublic shortly afterward.

Price ceilings for electric irons havebeen announced by the War ProductionBoard. About 81 per cent of the total2,037,838 irons authorized to be pro-duced by the industry this year forconsumers will retail from $5.30 to$11.70, based on March, 1942, prices.

Change Your Tube CeilingsRadio service dealers and distributors

have put in effect the maximum ceil-ing prices governing the sale of radiotubes as established by the OPA effect-ive May 20th.

The OPA has announced the follow-ing corrections in the original retailceiling prices, effective June 26:

Type

Maximum Retail PricesOriginally New PriceAnnounced Effective 6/26

01A $ .852A3 1.606P7G 2.306SL7GT/G 1.5512SL7GT/G 1.55

$ .901.902.351.601.60

Dealers should make the abovechanges on the OPA ceiling price post-er which was enclosed with the Juneissue of RADIO SERVICE DEALER.

our fumeAS A

Radio EngineerAssistant EngineerLayout DraftsmanLaboratory AssistantQuality TesterAnalyserPhaser

depends on what you do now!Why not find out what Motorola offersyou in future security, rapid advance-ment, recognition, and salary increases.The positions open are in Develop-ment, Specifications, Production, Engi-neering and Test Equipment. List yourqualifications on one side of a sheet ofpaper. Name the position you want.We'll send you the details. Get yourletter in the mail today.

ditoretof.akadieGALVIN MAUFGGLISTCAOBRLVP CHICAGODO.R

541 SIL4L5.

asimmmmsmir"/

ROLLING ON TO

* Clarostat continues to be engaged 100%in the most important iob of all -winning thewar -on land, sea and in the air.

But after victory has been won. Clarostatpromises the trade- servicemen, jobbers andothers -that Clarostat products for initial andreplacement uses alike, will once more begenerally available for peacetime pursuits.Meanwhile, let's keep 'em rolling!

CLARSTA1 WC CO Inc., 2851 N 6s St., Brooklyn N.Y.


Let these ppstem` #1

There's a day coming when the enemy will belicked, beaten, whipped to a fare-thee-well-everylast vestige of fight knocked out of him.

And there's a day coming when every mother'sson of us will want to stand up and yell, to cheerourselves hoarse over the greatest victory in his-tory.

But let's not start the cheering yet.In fact, let's not start it at all-over here. Let's

leave it to the fellows who are doing the job-the only fellows who will know when it's done -to begin the celebrating.

Our leaders have told us, over and over again,that the smashing of the Axis will be a slow job,a dangerous job, a bloody job.

Official U. S.Signal Corps Photo

And they've told us what our own commonsense confirms: that, if we at home start throw-ing our hats in the air and easing up before thejob's completely done, it will be slower, moredangerous, bloodier.

Right now, it's still up to us to buy War Bonds-and to keep on buying War Bonds until this waris completely won. That doesn't mean victoryover the Nazis alone. It means bringing the Japsto their knees, too.

Let's keep bearing down till we get the newsof final victory from the only place such news cancome: the battle -line.

If we do that, we'll have the right to join thecheering when the time comes.

16§.0 eacky ern up with War 80/7df

RADIO SERVICE DEALER

This is an official U.S. Treasury advertisement-prepared under auspices of Treasury Department and War Advertising Council.

September, 1944 35

ELECTROR a-

The major part of all radio set electro-lytic replacements these wartime days canbe handled with these nine selected voltageratings and capacitances comprising theAerovox Victory Line:

TYPE PRSV DANDEES

D.C.W.V CapacityD.C.W.V. Capacity

2550

150150150

25 mfd.10 mfd.20 mfd.20-20 mfd.50 mfd.

250450450450

20 mfd.10 mid.10-10 mfd.40 mfd.

Ask Our Jobber . . .

7/14 INDIVIDUALLY TESTED

AEROVOX CORP., NEW BEDFORD, MASS.. U. S. A

In Canada AEROVOX CANADA LTD., HAMILTON, ONT.

Export. 13 E 40ST NEW YORK 16. N.Y. Cable: 'ARLAB'

As,

ADA'S6.141.

SERVICEMANUAL

Here's theBook You'reBeen Wafting

for!Contains all

available ServiceData on all

FADA Receivers$ I 00

PlusPostage

Send for it Nowt

ANIND/SPENJABIEA/D TO THESERV/CE MAN

dt

G.

FADA OF NEwYcanc928 BROADWAY NEW YORK, N.Y.Large Stock of Replacement Parts & Cabinets

Aerovox Corporation 36Agency: Austin Lescarboura & StaffBrach Mfg. Co., L. S 24Agency: United Adv. Co.Bursteen-Applebee Co. 36Agency: Frank E. Whalen Co.Cinaudagraph Speakers, Inc. . 32Agency: Michael S. MayserClarostat Mfg. Co. 34Agency: Austin Lescarboura & StaffElectro-Voice Mfg. Co. 26Agency: Shappe-Wilkes, Inc.Fada of New York 36Agency: Sternfield-Godley, Inc.Galvin Mfg. Corp. . . .34 & 3rd CoverAgency: Gourfain-Cobb, Inc.General Cement Mfg. Co. 32Agency: Turner Advertising Agcy.General Electric Co. 3 30Agency: N. W. Ayer & Son, Inc.Hallicrafters Co., The 25Agency: Burton Browne, Inc.Ken-Rad Tube & Lamp Corp. . . 28Agency: Allen, Heaton & McDonald, Inc.Lafayette Radio Corp. 30Agency: Shappe-Wilkes, Inc.Mallory & Co., Inc., P. R. .2nd CoverAgency: Western Advertising Agency, Inc.McElroy Mfg. Corp. 36Agency: Shappe-Wilkes, Inc.Meek Industries, John 10Agency: The Aitkin-Kynett Co.Meissner Mfg Co. 5Agency: Gardner Advertising Co.Murray Hill Books, Inc. 6Agency: The Harry P. Bridge Co.Racon Electric Co. 29Agency: Leon Allen, AdvertisingRadio Corporation of America 27Agency: Kenyon & Eckhardt, Inc.Raytheon Production Corp. .4th CoverAgency: Burton Browne, Inc.Rider, John F. 8Agency: Lansford F. King AdvertisingSprague Products Co. 23Agency: The Harry P. Bridge Co.Standard Transformer Co. 8Agency: Burnet -Kuhn Adv. Co.Supreme Instruments Corp. .. 34Agency: O'Callaghan Adv. Agency, IncSylvania Electric Products, Inc. 1

Agency: Arthur Kudner, Inc.United States Treas. Dept. . . 33

Universal Microphone Co., Ltd. 31, 32Agency: Ralph L. Power, Advtg.Utah Radio Prods. Co. 3Agency: The Buchen Co.Vaco Products Corp. 36Agency: Duane WanansakerWard Products Corp. 9Agency: Burton Browne, Inc.

ELECTRONIC

DEVICES

BURSTEIN-APPLEBEE CO.1012-1014 McGee St. Kansas City 6, Missouri

IN EVERY

V AC °mABERyi.

SCOWDRIVER

All of the

features that

make for

BETTER WORK,

Done faster,

with

Less effort.

... just a few

of these features

are mentioned below.

4STRENGTH

GRIP -EASY HANDLE

FREEDOM from SHOCKplus

INDIVIDUALITYfurnished by 173 types

WR ITE FOR CATALOG

VACO PRODUCTS CO.31 I E, ONTARIO ST., CHICAGO 11, ILL.

Canadian Branch Whse. 560 King St. W., Toronto 2, Ont.

7ed WicEWorld's Largest Manufacturer ofWireless Telegraphic ApparatusCOMPLETE CENTRAL OFFICE EQUIPMENT

McElroy Manufacturing Corp.82 Brookline Avenue Boston, Massachusetts

$1.00 PAID FOR SHOP NOTESWrite up any "kinks" or "tricks -of -the -trade"

in radio servicing that you have discovered. Wewill pay $1 in Defense Stamps for such previ-ously unpublished "SHOP NOTES" found ac-ceptable. Send your data to "Shop NotesEditor," RADIO SERVICE DEALER, 342Madison Ave., New York 17, N. Y. Unusedmanuscripts cannot be returned unless accom-panied by stamped and addressed return envelope.


In cooperation with theU. S. Army Signal Corps,Motorola Engineers hatedeveloped and are pro-ducing in quantity thevery versatile and now fa-mous Walkie-Talkie. Thisis a complete 2 -way F -M,Portable Radiotelephonesystem, battery poweredand carried pack -fashionon the fighter's back.

L

1044 dam?

There are a few businessmen, a lot

of typewriter executives and plenty

of arm -chair strategists who say that

the distributor is a dying duck be-

cause his is an uneconomic function.

But the fact remains that the cost of

distribution has always diminished

in direct proportion to the reduced

costs of manufacturing which result

from skilled product development

and volume sales. And remember

this...the distributor is an important

factor in both of these vital phases of

a successful merchandising operation!

Here Is What Your Motorola Distributor Will Do For You

I ie will introduce the Post War MotorolaF -M Radios and Automatic PhonographRadios by exhibiting the complete linein his showrooms.

lie will carry a complete stock in allprice brackets so you can order and getdelivery from day to day. He will carryparts for replacement and servicing.

He will help train your Servicemen ...teach them about F -M, Television (whenit is available), and how to service auto-matic phonographs.

Ile will help educate your Salespeople ...give them facts about the radios they sell.He will reduce the loss of sales whichresult from poor demonstration.

He will provide you with sales -stimulat-ing ideas and advertising promotions.He will strengthen your entire radio salesdepartment.

He is your responsible, ready -able -and -willing trouble shooter ... a man withan organization you can reach with afive -cent telephone call.

de Vtotolota natteguetyt 6/2,9121104W04 Readv

GALVIN MFG. CORPORATION CHICAGO 51

sficaola RadioF -M RADIO * PHONOGRAPHS * RADAR * TELEVISION * FM POLICE RADIO * MILITARY RADIO COMMUNICATIONS

ii" tam;oar\ m114

-11br

In a busy 1-tiustrial pity like Fort Wayne, Indiana, it isneceusary that any inserruption in electric service beretnexlied immediately. INDIANA SERVICE CORPORA-TION whict supplies electric light ar.d power to FortWayne's war plants, has found that two-way radio betweenthe dispatcher's office and service, patrol and repair trucksassures the quickest and most reliable means of commu-nication in any emergency. To assure even greater re-liability, this electronic communication system is equippedwith RAYTHEON high fidelity tubes.

That "Plus -Extra" quality that proved RAYTHEON thebest tube in the past, will be enhanced with all the knowl-edge that is being gained from manufacturing advancedelectronic equipment for the war effort. This wartime

All Four Raytheon Divisions Have BeenAwarded Army- Navy "E" Plus Stars

experience will doubly guarantee that you will be able tooffer your customers the best engineered and precision -made elctronic tubes for all applications. In the mean-time, RAYTHEON will continue to supply you with all theMR tubes that WPB allows, for you to pass on to thosewho need them most.

Raytheon Manufacturing CompanyRADIO RECEIVING TUBE DIVISION

Newton, Massachusetts Lou Angeles New York Chicago Atlanta

RAYTH 10 N '1440A

/47 utn-

:NA

RADIO AND ELECTRONIC TUBESDEVOTED TO RESEARCH AND MANUFACTURE O TUBES FOR THE NEW ERA OF ELECTRONICS

for preferred - americanradiohistory.com · facilities for civilian production. most receiver...

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