1@, SemeeNewsA PUBLICATION OF THE RCA TUBE DIVISION

OCTOBER

9 1955

Vol. 20, No. 3After each RCA "Silverama" Aluminized Picture Tube has undergone carefully controlledmanufacturing operations, it must successfully pass a series of critical performance tests.Only then is it deemed worthy of bearing the famous RCA trademark. This and other out-standing features of RCA "Silverama" Aluminized Picture Tubes are highlighted in thecurrent "Silverama" promotion and advertising campaign. For full details about thispowerful new RCA Tube Division program, turn to the story beginning on page 2.

New Promotion Program Tailor -Made to Help You Sell RCA Aluminized Picture Tubes

THE RCA

Your RCA distributor now standsready to help you cash in on the mostdynamic, sales stimulating promotionand advertising drive in picture tubehistory: the RCA "Silverama" Alumi-nized Picture Tube Campaign.

Valuable Merchandising Booklet (Form 4F902)

This hard-hitting program waslaunched by the RCA Tube Divisiononly a few days ago. With your activesponsorship, it will assure you increasedbusiness, greater prestige, and moreprofits.

The RCA "Silverama" campaign isloaded with a wide variety of outstand-ing new merchandisers backed by anintensive schedule of dramatic adver-tisements in national consumer maga-zines as well as colorful commercialson coast -to -coast radio and televisionshows. In addition, this promotiondrive can be stimulated by your place-ment of local newspaper ads and radio

We recommendand use RCA

,jilveramaALUMINIZED PICTURE TUBES /

"Silverama" Decal (Form 4F905)

superior replacementPicture Tube for yourpresent TV Set!

Important NECabout greater

TELEVISION

ENJOYMENT

0RCA Picture Tubes 03

CAMPAIGN

and TV spot announcements. All aregeared to direct TV set owners to yourlocal service operation by urging themto have you replace their worn or"tired" picture tubes with new factory -

fresh RCA "Silverama" AluminizedPicture Tubes - for the most faithfulTV images their receivers are capableof delivering.

Intensive Advertising ScheduleIn your behalf, the powerful story

about RCA "Silverama"-the great newname in Aluminized picture tubes-willbe told repeatedly to the TV set ownersin your neighborhood via the mediumsof national magazines, local news-papers, radio, and television.

LIFE and TV GUIDE magazines willcarry a heavy schedule of full -page andhalf -page ads that point up the superiorfeatures of the RCA "Silverama" Alu-minized Picture Tube ...features whichmean the very finest in TV viewing.These dramatic ads will direct the vastreadership of TV set owners to you -their local service -dealer and TVtechnician.

THE

GA

sal OM

ALUMINIZED PICTURE TUBE

Consumer Mailer (Form 4F907) "Silverama" Banner (Form 4F906)

2 RCA RADIO & TELEVISION SERVICE NEWS

In addition, a specially -preparedseries of forceful newspaper ads an-nouncing the "Silverama" AluminizedPicture Tube will highlight on a localbasis a list of names and addresses of"Silverama" service -dealers. Be surethat your name is included in this listby contacting your RCA distributor assoon as possible.

On the NBC radio network, popularnew programs such as "Monitor" andold favorites such as "Fibber McGeeand Molly" will carry persuasive mes-sage to millions of prospects. There isalso a series of suggested radio scriptswhich you can use on your local radiostation to direct plus business your wayfor the fabulous RCA "Silverama."

On television, RCA's star-studded,coast -to -coast shows-with well-knownentertainers such as Milton Berle andMartha Raye - command a vast audi-ence of prospective customers for TVservicing. The public acceptance ofthese telecasts is your assurance of thebroadest possible coverage for the RCA"Silverama" commercials which supportyour store or shop as local headquartersfor expert TV repairs.

`Silverama' Promotions

To further assure you of a profitableharvest in bonus sales of RCA Alumin-ized picture tubes, your RCA distribu-tor is making available a wide array ofnew "Silverama" sales promotion items.Your use of the following business aidsis a must if you wish to reap the fullbenefits of a campaign of this kind:

(1) "Silverama" Window DisplayKit ( Form 4F903).

Focal point of this eye-catching kitis the unit consisting of an easeled dis-play card and four side cards. Here is areal traffic stopper. The main displaycard points out that an RCA "Silver-ama" Aluminized Picture Tube puts"picture snap" in any set. It spotlightsa snappy black -and -white reproductionof the "Silverama" tube with a life -likeclown image. The four side cards pub-licize that factory -fresh "Silverama"tubes are clearer, brighter, and sharper.

The kit also includes two attractivewindow streamers which tell an impres-sive story at your storefront. They callimmediate attention to the gigantic"Silverama" advances. Additionalquantities of these streamers (identi-fied as Form 4F904) may be obtainedon a separate basis, if desired.

(2) "Silverama" Decal (Form4F905).

Especially decorative on your dooror store window, this easy -to -applydecal quickly identifies your store asheadquarters for RCA "Silverama" Alu-minized Picture Tubes. Bold black -

The "Silverama" Window Display Kit (Form4F903) consists of an easeled display card andfour side cards (shown below), as well as twowindow streamers (shown at left).

ALUMINIZED PICTURE TUBE

RCA ern1H1ALUMINIZED PICTURE TUBES

,", RADIO CORPORATION of AMERICA

Replacement Wall Chart (Form 4F909)

and -white format ties in with your lithodisplay.

(3) "Silverama" Banner (Form4F906).

Here is a beautiful satin -type bannermounted on a spear -tipped cross barcomplete with cord, tassels, and fringe.This banner, featuring a blazing mes-

SERVICE DEALER I 1.:111,; AD OATS& SPOT COMMERCIALS

39.....

..

Ad Mats and Commercials (Form 4F911A-H)

sage to capture the imagination, cer-tainly will round out your "Silverama"window display.

(4) "Putting on a Good Front"(Form 4F902) .

This valuable 16 -page, illustratedguide contains many merchandising

(Continued on next page)

October, 1955 3

YOUR STORE NAME

RCA Window Valance (Form 3F17)

DEALER NAME

TV -RADIOSERVICE

94 WE USE RCA TURES

Outdoor Illuminated Sign (Form 3F101)

Service Call Uniform (Form 3F229)

WE USE RCA TUBES

TV -RADIOSERVICEDEALER'S IMPRINT

eMinnttNeall11111111.11110111an".Mmatiallr

Giant Outdoor Sign (Form 3F160)

evils USE

RCAWETUBESIllirlrill...-..11111110111111.1

ita a a la itin

1111111110111111

tiniwinommulawilimmunamning*maw eaJP111111111,16 a EN WI

lkaaauaaagmiag p-

AC1 ACA awiaal&Q,4441a

411111111P41111

Tube Wall Rack (Form 3F/66)

Electronic Symbol Clock (Form 3F226)

'Silverama'(Continued from preceding page)

ideas which have been proved in useby successful dealers. It is bound tostimulate profitable action. And thispractical booklet is almost indispen-sable for planning your "Silverama"Window Display Contest entry.

( 5 ) Consumer Mailer ( Form 4F907) .Here is a handy self -mailer which

also can be used as an envelope stuffer.This informative mailing piece ties yourname and address in with the RCA"Silverama" ads in LIFE and TV GUIDE.

( 6) Replacement Wall Chart (Form4F909) .

Keep the vital "Silverama" data on

1

0

RCA 'SILVERAMA' WINDOW

Opportunity is knocking! Answer thecall and you may be rewarded with abig share of the $12,000 in UnitedStates Savings Bonds to be presented bythe RCA Tube Division to the aggres-sive service -dealers and their RCA dis-tributors' salesmen who are selected aswinners in the recently announcedRCA "Silverama" Window DisplayContest.

Imagine, beside reaping the tremen-dous sales advantages from participat-ing in RCA's dynamic "Silverama" Alu-minized Picture Tube Campaign, youmay be named to receive the specialcontest award in your RCA sales re-gion: a $1,000 U. S. Savings Bond.Eight such awards will be handed out,one to each of the service -dealer con-test winners who come out "first" ineach of the eight RCA sales regions.

In addition, a $500 U. S. SavingsBond will be awarded to each of theeight RCA distributor salesmen whocountersign the winning entries. Bear-ing this in mind, ask your distributor's

4 RCA RADIO & TELEVISION SERVICE NEWS

this chart at your fingertips! Post it nearyour service bench! A quick check willshow you what "Silverama" replace-ments to use.

(7) Dealer Ad Mats and Spot Com-mercials (Form 4F911A-H) .

Here are eight small and medium-sized ads from which to choose - justwhat you need to advertise your storeas headquarters for RCA "Silverama"Aluminized Picture Tubes. Each ad isready for use by your local newspaper.Your RCA distributor will help youmake your final selection from a proofsheet for maximum effectiveness.

Suggested spot radio and TV com-mercials are also available from yourRCA distributor to help you launch a

forceful and well-rounded local cam-paign.

Popular Business Builders

In addition to the new "Silverama"promotion items, your RCA distributoris also offering RCA's Service Call Uni-form (Form 3F229), Giant OutdoorSign (Form 3F160), Outdoor Illumin-ated Sign (Form 3F101), WindowValance (Form 3F17) , Electronic Sym-bol Clock (Form 3F226), TV ServiceSign (Form 3F230), and Tube WallRack (Form 3F166).

. . .Now that you are familiar with the

facts about RCA's dynamic new"Silverama" Aluminized Picture Tube

Campaign, get together with yourRCA distributor immediately and dis-cuss your participation in this programand how you can best take advantageof the profit opportunity being offeredyou. Bear in mind that any delay onyour part in jumping on the "Silver-ama" bandwagon means a delay inyour reaping the harvest of potentialRCA picture tube business being cre-ated by the "hottest" picture tube drivein the industry.

For details on the outstanding fea-tures of RCA "Silverama" AluminizedPicture Tubes, along with a listing ofthe 26 types in RCA's "Silverama" line,turn to the story beginning on 6.

Here are four suggested RCA `Silverama' window display arrangements

DISPLAY CONTEST FEATURES '1,000 U. S. SAVINGS BOND FOR EACH DEALER WINNER

salesman to assist you in planning yourwindow display right now.

How Dealer Qualifies for Award

The RCA "Silverama" Window Dis-play Contest is open to all radio andtelevision service -dealers (who use orsell RCA picture tubes) and theirservice employees, in the continentalUnited States, Alaska, and Hawaii.

To qualify for the award in your re-gion, merely install a display in yourstore window featuring the new RCA"Silverama" display materials. (Theseitems are described in this issue ofRADIO AND TELEVISION SERVICE NEWS.)Other RCA display and product itemsalso may be included.

Then, have a photograph of yourwindow display taken. This picturemust be a clear print, preferably an8 -inch by 10 -inch size, black -and -whiteglossy. Attach the photograph to yourofficial "Silverama" Window DisplayContest entry blank. Obtain entryblanks from your RCA distributor.

You may enter as often as you likeif you choose to rearrange your windowdisplay within the duration of this con-test. But each entry must be on anofficial entry blank and only one prizewill be awarded per person. Your entrymust be submitted in your own nameand must include a photograph of yourwindow display. Be sure your RCA dis-tributor's salesman verifies and coun-tersigns your official entry blank.

December 1st Deadline

Mail your entry, using adequatepostage, to: RCA Tube Division, Dept.1955, Harrison, N. J. All entries mustbe postmarked on or before midnightDecember 1, 1955.

A panel of judges selected by theRCA Tube Division will determine thewinners of the contest. Winners will besingled out on the basis of originalityand compelling impact of their "Sil-verama" window displays. Duplicateprizes will be awarded in case of a tie.Decision of the judges is final. All en-

tries become the property of the RadioCorporation of America and none willbe returned. Entry in the contest con-stitutes permission to the Radio Cor-poration of America to use your nameand entry in any way it sees fit.

The contest is subject to federal,state, and local regulations. Winnerswill be notified about 30 days after theclose of the contest. A list of the win-ners may be obtained at that time bysending a stamped, self-addressed en-velope to the address shown above.

Mail only your contest entry in yourenvelope. No general correspondenceshould be addressed to Dept. 1955.

. . .Yes, sir, now that you know how

really easy it is to enter RCA's windowdisplay contest, you must agree that itcertainly will pay for you to tie in withthe outstanding "Silverama" program.Set up a window display featuring thenew RCA "Silverama" promotion ma-terials . . . and you are in the contestfor awards in profit and prestige!

October, 1955 5

Features of `Silverama' Picture TubesHere are some of the outstanding

features of RCA "Silverama" Alumi-nized Picture Tubes highlighted in thecurrent campaign. These features leadto greater customer satisfaction.

(1) "Advanced Technique" Alumi-nizing.

Only the most modern, completelyautomatic, continuous -productionequipment is used by RCA to alumi-nize the "Silverama" Picture Tube.Every phase of the aluminizing processis carefully supervised by RCA's staffof experienced engineers, including aprecise check of the thickness and uni-formity of the aluminum reflectingcoating by a special RCA -designedelectronic instrument.

The carefully applied aluminum coat-ing in the RCA "Silverama" PictureTube reflects toward the viewer thelight that otherwise would "bounce"from the sides and back of the tube tocause a graying of the picture blacksand the resultant weak picture of poorcontrast.

The problems of mottling, "spider -webbing," "orange peeling," or "waf-fling" is a thing of the past in the amaz-ing RCA "Silverama" - as a resultof the "advanced technique" process

employed immediately prior to alumi-nizing.

(2) Screen Color Uniformity.In the RCA "Silverama," screen color

uniformity is assured by rigid RCAcontrols of all raw materials and manu-facturing processes. A significant con-tribution to this highly importantcharacteristic is a special RCA -developed super -phosphor. Thissilver -activated phosphor is processedin glass -lined tanks and fully sterilizedequipment for optimum purity; it isfired at higher than normal tempera-tures for greater light output.

(3) Precision Electron Gun.This gun is manufactured, assembled,

and microscopically tested to RCA'srigid specifications. The electron beamin each "Silverama" Aluminized PictureTube energizes the entire screen inpin -point detail, assuring picture clar-ity and sharpness. The precise controlof spacings and dimensions of all partsof this precision electron gun contrib-utes to the "picture snap" which hasmade RCA picture tubes so famous.

(4) Top -Quality Control.At every step of production from the

raw material stage through every manu-facturing process to the final product,

FACE

PLATE

SilveramaPICTURE TUBE

ALUMINUM

COATING

PHOSPHOR COATING

NON -

ALUMINIZED

TUBE

top-quality control is the secret of cus-tomer confidence in RCA products.After each "Silverama" AluminizedPicture Tube has undergone the care-fully controlled manufacturing opera-tion, each tube must then successfully

RECEIVING -TUBE HEATER -CONTINUITY CHECKER

Tests All Octal, Lock -In, and Miniature Types, Including

Heater Mid -Taps and Rectifiers Utilizing Pins 2 and 8

With series -string TV receivers in-creasing in popularity, the need for a

A=OCTAL(2-7),MIN., LOCK -INB=M D TAPC=OCTAL (2-8) AI

OCTALSOCKET

3

RCA +VS090

BATTERY

quick means of finding tubes with"open" heaters is evident. Since one"open" tube removes heater powerfrom all tubes in the string, location ofthe defective tube becomes a matter oftrial -and -error that can be time-con-suming. The heater -continuity checkerdescribed here, however, greatly sim-plifies the task by eliminating the needfor checking socket connections. Thischecker also provides a faster meansfor checking heater continuity than theusual ohmeter-and-test-leads method.

It is only necessary to insert the sus-pected tube into the appropriate socketon this checker. If the tube heater hascontinuity, the neon lamp will glow. Ifthe tube heater is open, the lamp willnot light. This checker is simple to con-struct and offers features not found in

AL

(2-3)OCTA(2-7) OCT.

LOCKIN

most tube -heater checkers. It can beused for servicing TV receivers, andportable and ac/dc radios. The unit iswired to accommodate tubes having awide variety of heater connections. Itcan be used to test the heater continuity

RCA RADIO & TELEVISION SERVICE NEWSINDICATORLAMP

pass a series of critical performancetests. Only then is it deemed worthy ofbearing the famous RCA trademark.

(5) Warranty Protection.All RCA replacement picture tubes

are warranted for one full year fromdate of installation.

e

At the present time, there are thefollowing 26 types in RCA's line of"Silverama" Aluminized Picture Tubes-which fit virtually every make of TVset on the market:

27MP424YP424D124 -A24CP4-A21 ZP4-B21YP4-A21FP4-C21EP4-B21AWP421AUP4-A/21AVP4-A21ATP421AMP4-A21ALP4-B21ALP4-A21ACP4-A20HP4-D20DP4-C/20CP4-D17QP4-A17L P4 -A17HP4-B17BP4-B17AVP4-A16RP4-A/16KP4-A12KP4-A10FP4-A5TP4

of practically all types of octal, lock -in,and 7- and 9 -pin miniature tubes. Aswitch permits checking continuity oftapped heaters and octal -based recti-fier tubes that use pins 2 and 8 forheater connections.

The checker is powered by an RCA-VS090 (90 -volt) battery. Current drainfrom the battery is less than 1 ma,under load, for all tube types. Conse-quently, battery life should approxi-mate shelf life. Although 117 volts acmay be substituted as a power source,the convenience of a built-in supplymakes the small additional expense ofthe battery well worth the investment.

No building instructions are given,as any small metal box or chassis canbe used in building the checker.

The neon indicator used in thischecker is a Postlite type 105 (DrakeMfg. Co.) which has a built-in 100,000ohm resistor and is rated to start at 65volts ac. If a neon or argon lamp with-out an internal resistor is used, an ex-ternal resistor should be added. Theswitch can be any inexpensive 2 -pole,3 -position, wafer switch.

The set of five ServiceParts directories nowbeing offered by RCAdistributors are invalu-able aids in servicingwork - for they offerthe technician concise,easy -to -follow data oneach of 370 RCA VictorTV receivers producedfrom 1946 through1954. In the photo atleft a serviceman isshown utilizing theSP -1014.

SERVICE PARTS DIRECTORIESComplete sets of five comprehensive

RCA Service Parts directories-the SP -1007, SP -1014, SP -1021, SP -1028, andSP-1035-are now available from yourRCA Service Parts distributor to pro-vide you with an authoritative yet low-cost reference library for all RCA Vic-tor television receivers manufacturedup to 1955.

Legibly printed and bound to lieflat when open, the big (10% -inch byI6% -inch) Service Parts volumes shouldprove invaluable to you in your servic-ing work. They feature concise data oneach of 370 RCA Victor TV receivers,clearly arranged to facilitate quick ref-erence. Information on color -TV receiv-ers and three -speed record -changers isincluded in the 1954 Directory.

The SP -1007 contains 80 pages withschematic diagrams and replacementparts lists for the 56 models of RCAVictor TV receivers manufacturedfrom 1946 through June, 1950. Eachschematic diagram faces its corres-ponding parts list for fast reference.

The SP -1014 contains 142 pageswith schematic diagrams, replacementparts lists, and bottom chassis viewsfor the 71 models of 1950 and 1951RCA Victor TV receivers. The com-prehensive index for model and chassisnumbers provides a ready source ofreference.

The SP -1021 contains 36 pages ofschematic diagrams, wiring diagrams,replacement parts lists, and top andbottom chassis views for the 27 modelsof 1952 RCA Victor TV receivers. Thecomprehensive index cross-referencesRCA TV model names to model num-

bers, and model numbers to the direc-tory in which information may befound.

The SP -1028 contains 84 pages withschematic diagrams, wiring diagrams,replacement parts lists, and top andbottom chassis views for the 108 mod-els of 1953 RCA Victor TV receivers.It also includes schematic diagrams, re-placement parts, and other informationfor radio chassis used in radio -TV com-bination receivers. Cross-referencedare: (1) model names to model num-bers of all RCA Victor TV receiversfrom 1946 through 1953 and (2) allmodel numbers and chassis numbers tothe directory in which information maybe found.

The SP -1035 contains 72 pages withschematic diagrams, top and bottomchassis views, replacement parts lists,and top and bottom chassis adjust-ments for the 106 models of 1954 RCAVictor TV receivers. Also included isinformation on the CT -100 and the 21-CT55 color -TV receivers and the RP -197 and RP -198 three -speed record-changers. The comprehensive indexreferences model names to model num-bers of all RCA Victor TV receiversfrom 1946 through 1954, and all modeland chassis numbers to the directoryin which information may be found.

You can purchase the complete setof five RCA Service Parts directoriesfrom your RCA distributor for only$5.35. Individually, the directories arepriced as follows: 75c for the SP -1007;$1.50 for the SP -1014; 50c for the SP -

1021; $1.35 for the SP -1028; and $1.25for the SP -1035.

October, 1955 7

RCA RECEIVING TUBES FOR 1Series-String TELEVISION APPLICATIONS

For your convenience, here is an up-to-date listing of RCA receiving tubesfor TV receivers with 600 -ma series -connected heater strings.

All of the following new tubes haveheaters designed for the same warm-up time, to minimize voltage unbalanceduring starting. Except for items in-volved in the changes of heater design,these tubes correspond electrically andmechanically to the prototypes noted.

The 32 RCA series -string receivingtubes are the following:

RCA-2AF4-A-UHF oscillator triodeof the 7 -pin miniature type, having a2.35 -volt / 0.6 -ampere heater. Proto-type: 6AF4-A.

RCA-3AL5-twin diode of the 7 -pinminiature type, having a 3.15-volt/0.6-ampere heater. Prototype: 6AL5.

RCA-3AU6-sharp-cutoff pentode ofthe 7 -pin miniature type, having a 3.15 -volt / 0.6- ampere heater. Prototype:6AU6.

RCA- 3AV6 - twin diode - high -mutriode of the 7 -pin miniature type, hav-ing a 3.15 -volt / 0.6 -ampere heater.Prototype: 6AV6.

RCA-3BC5-sharp-cutoff pentode ofthe 7 -pin miniature type, having a 3.15 -volt / 0.6- ampere heater. Prototype:6BC5.

RCA-3BY6 - pentagrid amplifier ofthe 7 -pin miniature type, having a3.15 -volt / 0.6- ampere heater. Proto-type: 6BY6.

RCA-3CB6-sharp-cutoff pentode ofthe 7 -pin miniature type, having a 3.15 -volt / 0.6- ampere heater. Prototype:6CB6.

RCA-3CF6-sharp-cutoff pentode ofthe 7 -pin miniature type, having a 3.15 -volt / 0.6 -ampere heater. Prototype:6CF6.

RCA-4BQ7-A-medium-mu twin tri-ode of the 9 -pin miniature type, havinga 4.2-volt/0.6-ampere heater. Proto-type: 6BQ7-A.

RCA-4BZ7-medium-mu twin triode

of the 9 -pin miniature type, having a4.2-volt/0.6-ampere heater. Prototype:6BZ7.

RCA-5AM8 - diode - sharp -cutoffpentode of the 9 -pin miniature type,having a 4.7-volt/0.6-ampere heater.Prototype: 6AM8.

RCA-5AN8 -medium-mu triode -sharp -cutoff pentode of the 9 -pin min-iature type, having a 4.7-volt/0.6-ampere heater. Prototype: 6AN8.

RCA-5AQ5 - beam -power tube ofthe 7 -pin miniature type, having a 4.7 -volt / 0.6- ampere heater. Prototype:6AQ5.

RCA-5AS8-diode-sharp-cutoff pen-tode of the 9 -pin miniature type, hav-ing a 4.7-volt/0.6-ampere heater. Pro-totype: 6AS8.

RCA-5AT8-triode-pentode conver-ter of the 9 -pin miniature type, havinga 4.7-volt/0.6-ampere heater. Proto-type: 6AT8.

RCA -5J6 - medium -mu twin triodeof the 7 -pin miniature type, having a4.7-volt/0.6-ampere heater. Prototype:6J6.

RCA -5U8 - medium -mu triode -sharp -cutoff pentode of the 9 -pin mini-ature type, having a 4.7-volt/0.6-ampere heater. Prototype: 6U8.

RCA -5X8 -triode -pentode con-verter of the 9 -pin miniature type hav-ing a 4.7-volt/0.6-ampere heater. Pro-totype: 6X8.

RCA-6AW8-high-mu triode -sharp -cutoff pentode of the 9 -pin miniaturetype, having a 6.3-volt/0.6-ampereheater. No prototype.

RCA-6CG7 medium -mu twin tri-Ode of the 9 -pin miniature type, havinga 6.3-volt/0.6-ampere heater. No pro-totype.

RCA -6S4 -A -medium-mu triode ofthe 9 -pin miniature type, having a 6.3 -volt / 0.6 -ampere heater. Prototype:6S4.

RCA-6SN7-GTB-medium-mu twintriode of the 8 -pin glass -octal type,

having a 6.3-volt/0.6-ampere heater.Prototype: 6SN7-GT.

RCA-7AU7-medium-mu twin triodeof the 9 -pin miniature type, having acenter -tapped heater that may be op-erated at either 7.0 volts/0.3 ampere or3.5 volts/0.6 ampere. Prototype:12AU7.

RCA- 12AX4 - GTA- half -wave vac-uum rectifier of the 6 -pin glass -octaltype, having a 12.6-volt/0.6-ampereheater. Prototype: 12AX4-GT.

RCA -12B4 -A -low -mu triode of the9 -pin miniature type, having a center -tapped heater that may be operated ateither 12.6 volt/0.3-ampere or 6.3 volts/0.6 -ampere. Prototype: 12B4.

RCA - 12BH7 -A -medium -mu twintriode of the 9 -pin miniature type, hav-ing a center -tapped heater that may beoperated at either 12.6 volt/0.3 ampereor 6.3 volts/0.6 ampere. Prototype:12BH7.

RCA - 12BQ6 - GTB / 12CU6 - beampower tube of the 7 -pin glass -octaltype, having a 12.6-volt/0.6 ampereheater. Prototype: 6BQ6-GT.

RCA-12BY7-A-sharp-cutoff pentodeof the 9 -pin miniature type, having acenter -tapped heater that may be op-erated at either 12.6 volt/0.3 ampereor 6.3 volts/0.6 ampere. Prototype:12BY7.

RCA-12CA5-beam power tube ofthe 9 -pin miniature type, having a 12.6 -volt / 0.6 -ampere heater. Prototype:6CA5.

RCA-12L6-GT - beam power tubeof the 7 -pin glass -octal type, having a12.6 -volt / 0.6- ampere heater. Proto-type: 25L6-GT.

RCA-12W6-GT - beam power tubeof the 7 -pin glass -octal type, having a12.6-volt/0.6-ampere heater. Proto-type 6W6-GT.

RCA-25CD6-GA-beam power tubeof the 6 -pin glass -octal type, having a25-volt/0.6-ampere heater. Prototype:25CD6-G.

From RCA Service Company:

RADIOPHONO

TV

TIPSNotes on EP 45 -RPM Records

A) General"Extended Play" records have in-

creased playing time, which is madepossible by recording to a smaller in-side diameter on the records. EP re-cords may be recorded to a minimumdiameter of 4.25", or 1%" from the sideof the center -post of the record player.B) Record -Changer Pre -Tripping

The record -changer arm should tripwhen the stylus tip is 1-9/32" from thecenter -post. Record changers which areadjusted to this dimension will operatecorrectly with EP records.

Changers which have been improp-erly adjusted, or which have beenadjusted to trip earlier on standardrecords, may trip at a diameter greaterthan 4.25". When this condition occurs,a tripping adjustment is necessary.C) Review of RCA Victor 45 -RPM

Record -Changer Tripping Adjust-ments

Tripping adjustments for RCA Vic-tor 45 -RPM record -changers are shownin the accompanying diagrams at right.Before making an adjustment, cycleand test the mechanism for normal op-eration. If an adjustment is necessary,measure the tripping distance by anyconvenient method. For example, thereverse side of a stroboscope disc maybe marked with a circle 1-9/32" fromthe center hole, or a 4-1/16" diametercircle may be inscribed about the cen-ter hole.1) RP -168 Changer

Assemble pickup arm and trip leverassemblies as shown (Figure 1). Leaveclamping screw (57) loose enough topermit trip lever to move horizontallyon the shaft. Turn eccentric landingadjustment stud screw to determineoutward and inward adjustment limits,and then set screw to its mid position.Hold the trip lever and move pickuparm inward or outward until mech-anism trips when stylus is 1-9/32" from

the centerpost. Tighten clamping screwafter determining correct adjustment.2) RP -190 Changer

Adjust the eccentric tripping stud( C, Figure 2) until the mechanismtrips when the stylus is 1-9/32" fromthe side of the centerpost.3) RP -193-1 Changer

If mechanism fails to trip when thestylus is approximately 1-9/32" fromthe side of the centerpost, bend the endof the segment engagement gear (Fig-ure 3) out for early tripping, and in forlate tripping.4) 930409 Changer

The EP adjustment on this changeris pre-set during manufacture. If themechanism fails to trip, the bent -upmetal tabs at either end of the trip slide(139 in Figure 4) may be bent fromtheir normal position. The tripping dis-tance on both EP and regular 45 rpmrecords will be affected by this adjust-ment.

Ballast Resistors

New ballast resistors used in radioand television receivers as replace-ments may give off smoke when firstused. Because the smoke may be ob-jectionable to a customer in the home,it is advisable that all replacementballast resistors be operated in the shopfor two to five minutes.

Grounding Metal Trim

In some models of RCA televisionreceivers, the safety glass for the kine-scope is held by a metal retainer whichalso serves as a decorative trim for thecabinet exterior. It is important thatthis metal trim be grounded throughthe copper strips provided in the cabi-net for this purpose. When installing orservicing these receivers, make surethat all strips are properly connected.

The TV receivers to which this notice310, 21-D-305, 21-D-317, 21-D-324,21-D-326, 21-D-327, 21-D-328, 21-D-330, 21-T-303, 21-T-313, 21-T-314,21-T-315, 21-T-322, 21-T-324, 21-T-342, and all corresponding models witha "U" suffix.

Of the above - mentioned models,those that include the letter "D" have acopper grounding strip that runs fromthe metal trim to the yoke hood supportrod mounting bracket, then down tothe rf tuner mounting bracket. Receivermodel numbers listed above which in-clude the letter "T" have a copper stripthat runs from the metal trim to theyoke hood support rod mountingbracket, then to the top of the high -voltage compartment shield. This lat-ter strip is secured by spring clips.

SAPPHIRE POSITIONWHEN TRIPPING

PICKUP ARM(2)CENTERPOST

TURNTABLE (8) (37)

STUDONTRIP PAWL

LOOSEN CLAMPING SCREW(57) TRIP LEVER1.742V..

AND ADJUST POSITION OF ASSEMBLY (56)TRIP LEVER 58 50 THATTRIPPING WILL TAKE PLACEAT SPECIFIED POSITION OF SAPPHIRE

S%'7SWNUT(55)

Figure 1: RP -168 Changer

SLIDE (STOCK NO. 76101)

SAFETY LEVER

ECCENTRIC TRIPPING STUD (C)

LANDING ADJUSTMENT STUD (B)

Figure 2: RP -190 Changer

END OF SEGMENT ENGAGEMENT GEARBEND OUT TO TRIP EARLYBEND IN TO TRIP LATE

PICKUPLEVER

Figure 3: RP -193-1 Changer

UPPER TRIP PAWL 129

---D PICKUP ARM LEVER124

ENGAGEMENT LEVER

.."1411kw-H.L

LOWER TRIPPAWL 131

TRIP SLIDE 139

Figure 4: 930409 Changer

October, 1955 9

Sam Pelz of Sam's Tee Vee, Morgan Hill, Calif.,is the lucky serviceman in the Western regionwho won $1,337 worth of RCA color -TV testequipment for his originality and interest in par-ticipating in the RCA -sponsored National Tele-vision Servicemen's Week. Here, E. J. Schmidt,manager of the Electronics Division of the LeoJ. Meyberg Company, RCA distributor in SanFrancisco, is shown congratulating Mr. Pelz (left)after presenting him with his award. Looking onis R. W. Frisbee, RCA Tube Division salesman.

8 Dealers Win 10,696 in AwardsComplete sets of RCA test equip-

ment for color -television servicing -each worth $1,337 - were recentlyawarded by the RCA Tube Division toeight service -dealers for their outstand-ing participations in National Tele-vision Servicemen's Week, held March7th to 12th of this year.

Each set of equipment includedRCA's WR-61A Color Bar Generator,WR-36A Dot Bar Generator, WO -78AWide -Band Oscilloscope, WR - 59CSweep Generator, and WR-89A Crys-tal -Calibrated Marker Generator.

National Television Servicemen'sWeek, listed with the Chamber ofCommerce of the United States, wasestablished for the first time by theRCA Tube Division as a salute toAmerican radio and TV dealers andservice technicians for their efforts inbringing to the American public itsgreatest medium of entertainment.

ServiceNewsA PUBLICATION OF THE RCA TUBE DIVISION

RCA RADIO & TELEVISION SERVICENEWS is published in the interest ofservice -men and service -dealers. It iswritten to assist them in providingbetter service, and to foster thegrowth of their business by supply-ing them with information on thelatest trouble -shooting and sales pro-motion techniques, sales and serviceaids, together with invaluable dataon RCA tubes, transistors, batteries,parts, and test equipment.

RCA RADIO & TELEVISION SERVICENEWS is a bi-monthly publication ofthe RCA Tube Division, Harrison,New jersey.

Copyright 1955Radio Corporation of America

Harvey SlovikEditor

Charles HowardTechnical Editor

Names of the NTSW contest win-ners, as well as the authorized RCAtube distributors who formally pre-sented the special prizes in their re-spective areas, are as follows:

Southwestern region: Charles L. Grif-fin, Griffin Radio and TV Service, Dyer,Tenn.; Bluff City Distributing Com-pany, Memphis.

Central region: Chic Young, ChicYoung TV Engineering Service, Madi-son, Wisc.; Satterfield Electronics Inc.,Madison.

East Central region: Jerry Rowlandand Bob Jenkins, Northwest TV Salesand Service, Flint, Mich.; Shand RadioSpecialties, Flint.

Eastern region: Leon Bernstein, PeakTelevision Service, Inc., York, Pa.;

York Radio and Refrigeration Parts,York.

Western region: Sam Pelz, Sam'sTee Vee, Morgan Hill, Calif.; Leo J.Meyberg Company, San Francisco.

Northeastern region: Andrew Bala-motis, Beaudry & Monette, Inc., Lowell,Mass.; DeMambro Radio Supply, Bos-ton.

Southeastern region: Daniel F.Owen, Owen's TV, Fayetteville, N. C.;Southeastern Radio Supply, Fayette-ville.

West Central region: Hardy Rick-beil, Rickbeil's, Worthington, Minn.;Warren Radio Supply, Sioux Falls, S.D.

Editors of leading radio and TVservicing trade publications comprisedthe board which selected the winners

Daniel F. Owen (second from left) of Owen's TV, Fayetteville, N. C., receives the award of a completeset of RCA color -TV test equipment as the Southeastern regional winner in the RCA Tube Division'sNational Television Servicemen's Week contest. To the left of Mr. Owen is W. G. Scroggin, Jr.,general manager of Southeastern Radio Supply, RCA distributor in Fayetteville. To his right(clockwise) are A. 0. Ellingson, RCA Tube Division field representative; D. M. Branigan, RCA dis-tributor sales manager, and R. I. Rothstein, general sales manager of Southeastern.

10 RCA RADIO & TELEVISION SERVICE NEWS

YORK, PA., SERVICEMAN IS 'KING' FOR A DAYWhat with television interviews

and special luncheon and dinnerceremonies, July 15th certainly wasa memorable day far Leon Bernsteinof Peak Television Service, Inc.,York, Pa. Mr. Bernstein is the East-ern regional winner of $1,337 worthof RCA color -TV test equipment,awarded to him for his original andinteresting participation in the RCA-

sponsored National Television Serv-icemen's Week, March 7th to 12th.

The eventful activities began atnoon with a formal luncheon heldfor Mr. Bernstein by his local RCAdistributor, York Radio and Refrig-eration Parts. On hand for the lunch-eon were S. W. Mosebrook, salesmanager of York Radio and Refrig-eration Parts, and C. B. Kilian, RCATube Division sales representative,as well as York newspaper reporterswho highlighted Mr. Bernstein, hisaward, and National TV Service-men's Week in the local press.

Messrs. Bernstein and Kilian were

then interviewed at 1:00 p.m. by"Steve and Eve" on station WORK -TV, and at 7:00 p.m. by Otis Morse,news analyst, on station WSBA-TV.

The actual presentation of the testequipment award was held at theYorktowne Hotel following dinnerthere at 7:30 p.m. On hand for theoccasion: Mr. Bernstein and RobertH. Mayer, his business associate atPeak Television Service, Inc.; Josephand Leo Hochberger, Stew Mose-brook, Tom Ryer, and Sam Hoffmanof York Radio and RefrigerationParts; F. J. Brueggemann, Secretaryof the York Chamber of Commerce;Mr. Kilian of RCA; and a televisioncameraman from station WGAL-TV- who filmed the dinner activities.The film story on Mr. Bernstein'sreceipt of the RCA test equipment,along with complete details aboutNational Television Servicemen'sWeek, were presented on WGAL-TV the following evening at 11:00and on July 18th at 10:00 a.m.

noted above on the basis of the origi-nality and interest of the participationsdescribed. The contest was open to allradio and TV service -dealers partici-pating in National Television Service-men's Week (who use or sell RCAtubes) and their service employees.Entrants, however, had to be residents,doing business in the continental U. S.,Alaska, or Hawaii.

To have qualified for an award, a

service -dealer merely had to write astatement of 50 words or less describ-ing how he promoted and publicizedNTSW in his area. To this statement,he could attach any photographs, news-paper ads, or clippings concerning hisparticipation. His entry-on an officialentry blank-then had to be verifiedand countersigned by his distributorsalesman before being forwarded to theRCA Tube Division.

Jerry Rowland and Bob Jenkins of Northwest TV Sales and Service, Flint, Mich., stand by the RCAcolor -TV test equipment which was awarded them as East Central regional winners of the NationalTelevision Servicemen's Week competition sponsored by the RCA Tube Division. The winners areflanked on the left by George Dittman, East Central distributor sales district manager of the RCATube Division, and John Driver of Shand Radio Specialties, RCA distributor in Flint. On their rightare Jack Leahy, RCA Tube Division salesman, and Dick Anderson of Shand.

New Battery Types

Announced by RCA

Three new RCA battery types wererecently announced to help you satisfycustomer requests. They are the VS219-which rounds out RCA's popularseries of "slim-jim" radio "B" batteries;the VS060-RCA's latest addition to itsline of portable radio "AB" batterypacks; and the VS074 -RCA's newestpenlite cell.

The VS219 is a 90 -volt battery de-signed for use with RCA's VS065, a73i -volt "A" battery. You can expectgreat sales potential from this batterycomplement which finds its primaryapplication in current Motorola por-table radios. The VS219 is interchange-able with the Eveready 479, BurgessP60, and other batteries identified byNEDA No. 214.

The VS060 has a 5 -pin recessed plugand is designed primarily for replace-ment use in new Zenith portable radios.This RCA battery pack is interchange-able with the Zenith Z775, BurgessT5Z50P, and other battery packs iden-tified by NEDA No. 431.

The VS074 is a small version of theVS034 and is useful in pen -sized flash-lights and for miscellaneous toy appli-cations. It is interchangeable with theEveready 912, Burgess 7, Ray -O -Vac400, and other cells identified byNEDA No. 24.

It will profit you to have an amplestock of the three new RCA batterieson hand to fulfill your customers' re-placement needs. So order a good sup-ply of these types today.

RCA -237D1 Supersedes 219D1

The RCA -237D1, a completely new90 -degree deflecting yoke applicable topicture tubes of various sizes up to andincluding 27 inches, is now availablefrom your RCA distributor. The 237D1supersedes the older type 219D1 andoffers the advantages of smaller size,lighter weight, and lower cost -with nosacrifice of performance.

Because the coils of this yoke con-sist of precision -shaped, distributedwindings of a modified cosine design,uniformity of focus is maintained overthe entire kinescope screen, thereby as-suring good side and corner resolution.The 237D1 employs a ferrite core toprovide high deflection sensitivity. Inaddition, protection from breakdowndue to high peak voltages between coilsis provided by the use of molded insu-lation between the horizontal and ver-tical coils.

October, 1955 11

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