TM 11-617 1945 AN.TRC-7

8/21/2019 TM 11-617 1945 AN.TRC-7

http://slidepdf.com/reader/full/tm-11-617-1945-antrc-7 1/194

NICALMANUAL

ARY1945

P u b l

i c D o m a i n , G o o g l e - d i g i t i z e d

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a t h i t r u s t . o r g / a c c e s s_

u s e # p d - g o o g l e

8/21/2019 TM 11-617 1945 AN.TRC-7


NICALMANUAL

IONOFRESTRICTEDMATTER.

byvirtueofhisgrade orpositiontoknowledge

matter.Suchmatterisentrustedonly tothose

dutiesrequiresuchknowledgeorpossession.(See

0-5,15March1944.)

P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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2FEBRUARY1945.

TRC-7,ispublishedfortheinformation

ned.

TARYOFWAR:

ofOpn(2);Dept(2) DefComd

ASF(1); TechSv(2);SvC(2);

Dep(Sig Sec)(2);Dep11(2); Gen

WDGSLib(5);Lab11(2); A

27(a);11-237(3); 11-287(3);

597(3).

lsseeFM21-6.)


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a t h i t r u s t . o r g / a c c e s s_ u s e # p d - g o o g l e

8/21/2019 TM 11-617 1945 AN.TRC-7


RadioSet

1

.....33

erradio

.....56

610

11

..913

1014

1114

.1214

nt......1316

1416

...1516

d1617

nections

6


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RadioSet

et

nt2232

3

3

736

tructions.

heiruse.

ons...3145

echecklist.

st....3347

hecklist3449

maintenance.

aintenancetechniques.

main-

055


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aintenance

eters...4458

untings.5161

crophone5261

olknobs5362

aintenance.

ed5663

t

4

e6064

er....6465

checklist6566

6767

7


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fingandfungiproofing.

giproof-

68

ipment.

tions.

ipment.

ningof

mpli-

2

e-fre-

diate-fre-

te-fre-

976

uit....8077

ency

equency

r8379

ator....8480

fier....8581

2

83

8884

erstage8985

er....9086

fier....9287

88

9

ng9692


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ting.

ures....9996

0098

01100

ip....104108

ement..105108

acement107109

LSE-

8109

109

ts110109

ng....112111

treport113111

ment.

tionof

ter

6114

16


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ceparts.

ioSet

3

iliary

ment.121133

134

4

ons127134


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plifiedblockdiagram2

plifiedblockdiagramwithremote

quencyspectrumchart4

er-allillustration,whipantennaand

haccessories,disassembled5

inedimensionaldrawing8

T-53/TRC-7,withBatteryBA-70

10/TRC-710

110/TRC-7,components11

andAntennaBaseAB-37/TRC-7....12

ordCD-318-A14

M-52andControlUnitRM-5315

setupforoperation17

sassembled19

akelayout21

112/TRC-722

110/TRC-7,erectionbytwomen24

110/TRC-7,erectionbytwomen24


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110/TRC-7,erectionbyoneman25

110/TRC-7,erectionbyoneman26

110/TRC-7,installed27

wornbyoperator28

ornbyoperator29

w30

owingbatteryplugandreceptacle..31

hGeneratorG-3/TRC-7andac-

hAntennaAssemblyAS-110/TRC-7.38

ontpanel40

ol41

witch42

ntrol42

RT-53/TRC-7,frontpanel,showingref-

adjustmentforproperfrequency46

/U67

7

blockdiagram69


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ockdiagram70

2

er74

plifier75

er75

orandfirstaudioamplifier76

7

plifier78

harmonicgenerator80

plifier81

ndspeechamplifier82

83

ler84

plifier86

88

lycircuits90

ompleteblockdiagram91

ly109

entreport112

htsideofset 136

assistop142


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assisbottom138

assisrightside139

assisobliquerightsideview140

assisleftside141

assistuningcontrols142

3

144

okes145

6

47

wiringdiagram149

110/TRC-7,assemblyofcomponents..151

hematicdiagram153


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myfromusingorsalvagingthisequipmentfor

yourcommander.

dges,axes,handaxes,pickaxes,hammers,

es,machetes.

rosene,oil,flamethrowers,incendiary

ms,grenades,TNT.

nches,foxholes,otherholes.Throw

ELYAVAILABLEFOR

QUIPMENT

crystals,capacitors,resistors,coils,chokes,

kets,generator,batteries,

coils,transformerwindings.

s,antennasections,allcases,cab-

s.


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C-7.


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SETAN/TRC-7

.1)isa 16-tube,portable,low-power

atedbybattery,handgenerator,ora combina-

fora-m(amplitude-modulated),two-way

distancesin thev-h-f(very-high-frequency)

tendedprimarilytoprovidecommunication

aftusingtransmittingand receivingequip-

esamer-f (radio-frequency)range.Itmay

ipAntennaAT-59/TRC-7orAntennaAssem-

atteryBA-70,handGeneratorG-3/TRC-7,

thesourceofpower.RadioSetAN/TRC-7

motepositionby RemoteControlUnitRM-52

,basicnomenclaturefollowedby()

emofequipment.Forexample,CrankGC-7-

ndGC-7-AW.

ponentofRadioSetAN/TRC-7(fig.1)

T-53/TRC-7.Thereceiverusesasinglesuper-

nsmitterisamplitude-modulated.Forablock

eefigure49;for ablockdiagramofthetrans-

rone ofthetwochannelsprovidedisselected

SELECTORswitchonthefrontpanelof


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nit.Thecircuitsofthereceiverandthetrans-

aneously,sothattransmissionandreception

thesamefrequency.Eachchanneliscrystal-

ereceiverandthetransmitter(par.25).

C-7,simplifiedblockdiagram.

C-7,simplifiedblockdiagramwith

t.


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ch.Change-overfromreception*otrans-

yoperatingthereceiver-transmitswitchlo-

ord(fig.14)or onthehandleofthe handset

heparticularinstallation.

SetAN/TRC-7isdesignedfortransmis-

erticallypolarizedantenna(figs.1 and18).

woseriesswitchescontroltheapplication

theseswitchesareinseries,bothmust beclosed

sertingthe plugintothejackmarked

h,andturningthePOWERVOLUMEcontrol

osestheother.

RISTICS.

m,voice

bereceiveda-m,voice

udemodulation

nd-planeconical

ithcrystal-controlledoscillator

erodyne

s

70,GeneratorG-3/TRC-7,orboth

)510ma(min)600 ma(rriax)

ma (min)106ma(max)

)325ma(min)370 ma(max)

a (min)30ma(max)


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0 406080I0020040O6008OOF.

000KC)(l.OOO,OOC

C-7,frequencyspectrumchart.

OTHERRADIOSETS.

afrequencycoverage(fig.4)of100 to

chisthesameasusedby standardv-h-fequip-

municatewithanyv-h-fsetwhichoperates

plitudemodulation.

whichcanbeusedforcommunicationwith


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C-7,oner-allillustration,whipantenna

R

C-7,withaccessories,disassembled.


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TS.

10/TRC-7;consistingof:

12/TRC-7:

.

C-7;6inuse,2running spares.

1runningspare.

se,1running spare.

se,1runningspare.

e,2runningspares.

nningspare.

C-7(1Viin.).

C-7(1y2in.).

C-7(1in.).

runningspares.

s(2 perreel).

C-7.

riesBagCW-49/TRC-7andcontents.

riesRollCW-50/TRC-7andcon-

ries:

T-53/TRC-7andaccessories.

s,ControlUnitRM-52,andRe-

runningsparetubes.

2runningspares.

nnectsgeneratortoreceiver-trans-

ophoneT-45.

tHS-30-().

extensioncord.


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cludes:

n.

e.

ndsetTS-15).

1/TRC-7.

unningspare.

T-53/TRC-7;

CrystalUnitDC-11).

U.

52:

4runningspares.

ies:

10/TRC-7.

daccessories.

eCY-275/TRC-7;includes:


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C-7,outlinedimensionaldrauing.


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mitterRT-53/TRC-7,withBatteryBA-70attached.


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kedintwowoodenboxes.Case1is 251/4"

eep,andweighs96poundswhenpacked.Case

V&"deep,andweighs150poundswhenpacked.

ckedsetseefigure 7.

RRT-53/TRC-7(fig.8).

3/TRC-7consistsoftheradiochassis

Allthe controls,jacks,andterminalsare

l(fig.36).

waterproofhousinghasadualpurpose.

receiver-transmitterunit)housestheradio

housing(fig.8) covers,waterproofs,and

ryBA-70.Onthebottomof thechassiscase,

verprovidesconnectiontoBatteryBA-70

blyAS-110/TRC-7.


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onofthe controlsofReceiver-Trans-

aragraph28.

ubbergasketsactaswaterseajstoprovide

re.Specialjackwatersealassembliesprevent

oughthejacksonthe frontpanel(fig.71).

smitterandaccessoriesarecarriedinBag

chiscarriedinBagCW-47/TRC-7

S-110/TRC-7(fig.9).

110/TRC-7isa 12-section,30-footunit

tionoperationof RadioSetAN/TRC-7.The

portfortheconicalantenna(fig.20).The

oredinplacebythreesets oftwoeachnylon

one mancanerectit(par.19). Acoaxial

sectionoftheantennatothe ANTENNArecep-

smitterunit.

ERMALLETMX-I85/TRC-7

mblyAS-110/TRC-7,components.


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C-?

/TRC-7andAntennaBaseAB-37/TRC-7.

spackedinthe pocketsprovided(fig.35)

C-7.Thenthewholerollis securedand

/TRC-7(fig.32).

110/TRC-7isusedin placeofAntenna

aterrange.

/U.


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().

fig.11).

-7isanadjustable,28-inch,telescopic

etAN/TRC-7whenitis necessarytoputthe

tolimitrange,or toconcealtheset.Itis also

mblyAS-110/TRC-7iserected.AntennaBase

coaxialcableconnectstheradiosetand


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.12).

eused withRadioSetAN-TRC-7in

andHeadsetHS-30-().Thehandsetuses

atesinPlugsPL-55(receiver)andPL-68

transmitbutterflyswitchisincorporatedinthe

otavailable,HandsetTS-15willbe

tsareidenticalinphysicaldesign.Theydiffer

of thereceive-transmitwaferswitch.This

theoperationwiththeset.

13).

andclose-fitting.Specialsoftrubberear-

eiversoftheheadsetare designedtofitsnugly

eearpiecesexcludeoutsidenoisesandaid in

eheadbandisathin,steel band,adjustable

rator'shead.Attachtheclipontheheadset-cord

orelievethe pullofthecord(fig. 13).

g.14).

eT-45isanoise-cancelling,single-button,

nedtobewornontheupper lip(fig.27).The

45andCordCD-318-A.


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http://slidepdf.com/reader/full/tm-11-617-1945-antrc-7 30/194 P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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educesbackgroundnoiseandallowsspeech

nderallconditions.Thismicrophoneisused

nconjunctionwithCordCD-318-A,which

hereceive-transmitswitch(fig.14).Switch

ersimilartothebuttonon thehandleof

witchonthehandleof HandsetH-23()/U.

oneT-45consistsofdifferentialMicro-

thshield,a microphonebracket,rightand

StrapST-53,anda shortcordterminatingin

-AincludesJackJK-48intowhichmicro-

ed;SwitchSW-141;PlugPL-68forinsertion

rdsconnectingtheseitems;andaleather

e switch.

QUIPMENT(fig.15).

ntcomprisinglocalControlUnitRM-53at

stemandRemoteControlUnitRM-52atthe

nBagCW-49/TRC-7(par.27)alongwith

ds.BagCW-49/TRC-7iscarriedinBag

ocordsattachedtoControlUnitRM-53

RC-7.PlugPL-55isinsertedintothe

-68intotheMIC.jack.ControlUnit

olUnitRM-52arepartof RemoteControl

M11-2632,28October1944.

videspowerforoperationofRadioSet

oursofservicein moderateclimates.This

ybatterysectionsof 4.5volts,60volts,and

tionsuppliesthe necessaryvoltagetothe

thefilamentsofthereceiverand transmitter

dsections,connectedinseries,supply150

thetransmitterandreceiver.Receiverplate

oltsbyinternalresistorsin thereceiver.The

ectedtotheradiochassisbya receptacleand

enedtothe casewithstraps.Ifnecessary,

dinplaceof BatteryBA-70,butithasa

7(fig.16).

and-crankedgeneratorwhichsuppliesall

BatteryBA-70)ofthe voltagesrequired


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TRC-7,setup/oroperation.

et AN/TRC-7.Theaccessoriesrequiredby

,twoLegsLG-3-B,twoCranksGC-7-(),

alongwiththegeneratorarecarriedinRoll

ch,inturn,iscarriedin BagCW-48/TRC-7

ETAN/TRC-7

TNG,ANDCHECKING(par.27).

ackingorhandlingtheequipment,because

whennot protectedbythepackingcase.Check

dfromthepackedbagagainstthepackinglist.

uppliedasa guideandisnot tobeusedas

kingtheequipment,followthestepsbelow.

s(orcanvasbags,ifexport packaginghas

eoperatinglocationaspossible.


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nail puller,thenremovethesidesofthe

eaides off.Itmayinjurethe equipment.

packingcaseandallprotectivewrappings.

meachcarton.

-53/TRC-7.

-7.Lifttheinnerrubberinsulation,

-49/TRC-7.

andremovetheset.Removethecloth

cagel.

oteControlEquipment.

gCW-49/TRC-7.

ntrolaccessories:ControlUnitRM-53,

M-52.

eparatestheremotecontrolequipment

t thebattery.

ontainers.

110/TRC-7.

-7.

RC-7.

ontainers.

-7andremovetheantennaassembly

mpartments.

-7.

RC-7.

ainingthesilicagel.

7.

anditscomponents.

NTERCONNECTIONS.

ectingthebatterytothe receiver-transmit-

The batteryreceptacleonthebottomofthe


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8/21/2019 TM 11-617 1945 AN.TRC-7


RC-7.


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on theinteriorofthecaseto thebackofthe

gP1 tothereceiver-transmitter.

tedtothe receiver-transmitterbyplugging

heGENERATORreceptacleonthefront

onnectorsecurely.

ERRT-53/TRC-7.

3/TRC-7isshippedinBagCW-49/

ed,butit isnecessarytoinstallthe crystals

ransmittercircuitsmustbe preset(pars.

ofthe batteryandtheantenna,andconnec-

acombinationofHeadsetHS-30-()

equiredfora completeinstallation.

AS-110/TRC-7.

ctinga sitefortheoperationof the

clearanceinthecenterofit ofatleast45

gAntennaAssemblyAS-110/TRC-7.There

htbetweensetsforgroundoperation.

ation,stakelayout.


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T

mblyAS-112/TRC-7.


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nteroftheantennalocation,placethe

provided,drivethe swivelgroundstake

he baseplate.

hebaseplateinthe threedirectionsindi-

ate(fig.19).Driveeachgroundstake atthe

owni nfigure88.

ntennaassemblywithtwoormoremen.

y,onemancanassembletheantennaas

eantennamastflatontheground,laid out

eanglemadeby anytwogroundstakes.

Plates.

onsAB-35/TRC-7intooneanother

e swivelgroundstake.

B-34/TRC-7togetherandintothe

RC-7.Slipthelower(larger)guyplateon the

heremainingtwoMastSectionsAB-34

stSectionsAB-36/rnRC-7togethe

embly,sliptheupper(smaller)guyplateOL

ddthefinalmast section.

onsAB-78/TRC-7intoMastBase

dantennatotheassembledmastwith

vided.

TRC-7toMastBaseAB-77/TRC-7

onnectionandthejointofthe first

eradiusbendin thecordandlashit toMast

rictiontape.Thiswill relievethestraino-

e mastaboutthreetimes.

pesintoplaceontheupper andlower


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blyAS-110/TRC-7,erectionbytwomen.

blyAS-110/TRC-7,erection'ftytwomen.


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ysthroughthe respectiveground

rope andonelowerguyropeto eachstrap),

sthroughthecorrespondingopeningsonthe

eguystautand tiethematthebase

t theendofthe antennamastwhich

ndstake.Fromthis positionhewillbeable

mentduringerectionbypullingtheguyropes

antennaup(figs.21and22).

standnear thelowerguyplateand

aspossible.

uyropesraisesthe topoftheantenna

kstowardtheantennabase,raisingthe mastas

tis vertical,tiethethirdsetof guy

dreadjusttheothertwosets.

blyAS-110/TRC-7,erectionbyoneman.


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blyAS-110/TRC-7,erectionbyoneman.

yropes,whichare throughonlythe

d. Withyourrighthand,graspthe upperguy.

eantennatowardyouuntil itsnapsupward

on(figs.23and 24).

nnainto place.Theslow,steadypullwill

toa verticalantennaassembly.

opesto thebaseplate,andreadjust

antennatotheradioset bypluggingthe

receptacleonfrontpanelof theset.

ssemblyinreverseorder,butwalkan-

hanloweringitwith theguyropes.

7.

AT-59/TRC-7,refertoparagraph30bfor

ntenna.


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blyAS-110/TRC-7,installed.

ntennaBaseAB-37/TRC-7oneortwo

einto theslotinthe bracketonthereceiver-

ewasherbesidethewingnutshouldremainon

utto holdtheantennabasesecurely.

receiver-transmitterunitto thepanel.

ngthereceptaclemarkedANTENNAinthe

thepanel.Thiscoverwill remainonthechain.


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ctorontheantennabasecable intothean-

theplugsecurely.

RC-7tothethreadedfittingonAntenna

tensecurely.

EADSETHS-30-(),AND

oneaccessoriesusedwiththisradiosetmay

(),aswornby operator.


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5,aswornbyoperator.

/U,ora combinationofHeadsetHS-30-()

stalledbyinserting PlugPL-55intothe

dPlugPL-68intothejackmarkedMIC.

6) isinstalledbyinsertingPlug PL-55

NES.

7)whenusedwithRadioSet AN/TRC-7,

HeadsetHS-30-().The correctprocedure

gMicrophoneT-45andCordCD-318-A


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he headandadjustStrapST-50-Aso

419(fig.14)restson theupperlip.

ngsto provideacomfortableandse-

honeremainsinplacedespitemovementofthe

not moveeasily,moistenthemslightlywith

usted,MicrophoneT-45canberemovedand

radjustment.

topview.


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5sothatthe breathshieldisdirectly

MicrophoneUnitMC-419shouldtouchthe

esignedtoworkasclose tothemouthaspos-

within3/16inchof themouth,bendthemetal

ebracketinward(towardtheface)untilit is

heMIC.jackonthefront panelof

QUIPMENT.

nitRM-53andRemoteControlUnit

2.

smitterunitupsidedownonasmoothsur-

rightandtheside withthebucklesattached

BA-70fromBagCW-49/TRC-7(which

sandremotecontrolequipment),placeit up-

transmitterunitwiththeside bearingthelabel

otethatthearrownext tothereceptacleon

thearrowmoldedonthe neopreneplugonthe

Pushthebatterygentlyonto thepluguntil

mesagainstthe neoprenegasketonthereceiver-

nthesidesofthe receiver-transmitter,then

atteryfromthefarsideand throughthebuckles

erator.Openthebucklesonthewebstrapsand

thebucklesandpullthestraps outward,one

hebatterywiththe otherhand.Thisequal-

osidesofthebattery.Closethe clip-catchesto

llation.Placetheassembledbatteryandre-

htsideup.

8.

mitterfromthecase.Install fiveBatteries

9.All positiveendsofthecellsfacethe front

hatthe connectorisinserted-betweenthe

ther ear.

cells withanoperatinglifeofapproximate


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AR.

ystalunits insocketsmarkedREC.

N.1onthepanelof thereceiver-transmit-

elybyhand;usenotools.

ystalunits insocketsmarkedREC.

N.2onthepanel.Tightenclampssecurely

7(fig.16).

cessoriesarecarriedinRoll CW-50/TRC-7

y BagCW-48/TRC-7(fig.32).To mountthe

eedasfollows:

C-7.


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pwardthroughthemetall oopsonthe

nder theretainingsprings.

e twolegsandslip thebottomoftheat-

toitsretainer.Dropthe metalloopover

tonthebackofthegenerator.Liftupthe seat

ovidea securerest.

s,theninserttwoCranksGC-7-()into

thegenerator.Thelongshaftsofthe cranks

80° toeachother.

C-7.


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8/21/2019 TM 11-617 1945 AN.TRC-7


C-7.


/ h t t p : / / w w w . h



8/21/2019 TM 11-617 1945 AN.TRC-7


onthebottomofthe generator;letithang.

7.

theninserttheplugof CordCX-220/TRC-7

ptacleonthereceiver-transmitterpanel.

wreadyforoperation.

AION.

ovetheset,repackthecomponentsin,the

eunpacked.Thebagsandtheircontentsare

rearetwoBagsCW-47/TRC-7(fig.31-A

t.EachcarriesBagCW-49/TRC-7andits

.

rearetwoBagsCW-48/TRC-7(fig.32-A

t.EachcarriesRollCW-50/TRC-7andits

oofthesebags(fig.33)areused:one for

ndaccessories,theotherforBatteryBA-70

uipment.

3/BatteryBA-70

oteControlUnitRM-52

7

/TRC-1


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


35-Aand-C).Twooftheserolls are

ssembly,theotherfor thegeneratorand

0/TRC-7GeneratorG-3/TRC-7

m-

C-7,withGeneratorG-3/TRC-7andaccessories.


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8/21/2019 TM 11-617 1945 AN.TRC-7


C-7,withAntennaAssemblyAS-110/TRC-7.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


S

destroyingtheequipmenttopreventenemy

nnoticeat thefrontofthemanual.

E

ERPANELCONTROLS.

scontrols,jacks,andterminalswhichare

lof Receiver-TransmitterRT-53/TRC-7

edbelow.

ol(fig.37).ThePOWERVOLUME

mainpowerswitchandvariesthe volumeof

ontrolcircuitissodesignedthat thiscontrol

itterafter theswitchistripped.

Aselectionofbatterypower,gener-

teryandgeneratormaybemadewith the

witchatBAT.thebatterysuppliesboththe

er.Withtheswitchat GEN.,thegenerator

andthetransmitter.With theswitchat

esthereceiverandthegeneratorsuppliesthe

itch(fig.39).TheCHANNELSE-

ositions,givingaselectionoftwopreset

6-mcrange.

ntrol(fig.40).TheMONITORVOL-

dioSets AN/PPN-1andAN/PPN-2.

oneorMIC.jackprovidesaconnection

he receive-transmitswitch.

ESjackprovidesaconnectionforthe

he handset.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


Y

7'

-08

'S.Inc

ENERATOR

RC-7,frontpanel.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


Econtrol.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


CTORswitch.

UMEcontrol.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


NITORjackisusedwithRadioSets

e.Connectionfromhandgeneratorcable

dehere.Theplugisscrewedintothe re-

curely.

ConnectionismadefromAntennaAT-

emblyAS-110/TRC-7bypluggingthean-

ntothereceptacle(fig.41)andturningthe

nnectoruntilit issecure.

smitterRT-53/TRC-7,front

symbols.


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D


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


ltswhenRadioSetAN/TRC-7isoperated

thnohillsor largestructurestointerferewith

sible,avoidoperationunderbridges,ingulleys,

e theantennaisalwaysina verticalposition.

o touchbranchesorotherobjectswhentrans-

usethissetoperatesonveryhigh frequencies,

smay providegoodcommunicationwhere

RE.

bymeansofthe CHANNELSELECTOR

e paragraphs116and117forpresetting

9/TRC-7,usethecalibrationcharton

Loosentheantennalocknutone-quarterturn,

ainstthefrontedgeof thecabinet,andslide

untilitr eadsthedesiredfrequencyonthe

usted,hand-tightenthelocknutsecurely.

oBAT.position.

ngthePOWERVOLUMEcontrolina

7).Aclickindicatesthatthesethas been

s heardafteramoment,usuallyindicating

ngproperly.

pfor30secondsbeforeproceeding.

NSTRUCTIONS.

MEknobinaclockwisedirectionuntil

reached.

sh-to-talkswitchofMicrophoneT-45.

owerand turnsthereceiveroff.Waitabout

totalkinto themicrophone.Releasethe

nasthetransmissioniscompleted.Thisplaces

ositionagain.


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/TRC-7,adjustmentlorproperfrequency.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


ndgeneratoras theonlypowersupply,

setto theGEN.position.Inthis case,the

ankedduringtheentire periodoftransmission

enecessarytostandby,or listenforsignals

avoidturningthehandgeneratorforthese

tionpowersupplyarrangementmaybeused

chtoCOMB.Inthis position,thereceiver

ttery,andthetransmitterfromthe hand

hentooperatethe handgeneratoronlywhile

neratorshouldbestarted,however,shortly

itchisoperatedsothatpowerwill beavailable

isneeded.Neverusethebatteryfor trans-

ded,as thepowerconsumedbythetrans-

nthat requiredbythereceiver.

-52andControlUnitRM-53withthe

nishedtooperatetheequipmentfromaremote

rovidesforoperationofRadioSetAN/TRC7-

a presetadjustmentofthevolumecontro1

SeeTM11-2632.

RE.

e-transmitswitchlocatedinthehandle

ntrolstransmitting.Releaseofthisswitch

receiver,rotatethe POWERVOLUME

oOFF.

CECHECKLIST

CHECKLIST.

tperformancechecklist(par.34)willhelp

whetherRadioSetAN/TRC-7isoperating

vestheitemto bechecked,thecondition

ecked,thenormalindicationsandtolerances

hecorrectivemeasuresthattheoperatorcan

ckedbeforestarting,items6and7 whenstart-


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peration,anditem11when stopping.Items

becheckedatleastonceduringanormal

fourtimesadayduringcontinuousopera-

someitemstheinformationgivenin

umnconsistsofthesettings ofvariousswitches

heitemis tobechecked.Forotheritemsit

mustbetakento checkthenormalindication

oncolumn.

normalindicationslistedincludethe

eoperatorwill perceivewhenhechecksthe

erreadings,theallowabletolerancesofread-

er readsasspecified,operationcanbecon-

actthatitdoesnot,is asignofimpending

renot normal,applytherecommendedcor-

hecorrectivemeasureslistedarethose

ewithoutturningthe equipmentinforre-

einthe tableindicatesthatthecorrectionof

ctedduringoperationandthattrouble shoot-

airmaniscalledfor.I fthesetis completely

mendedcorrectivemeasuresdonotyield

necessary.However,ifthetacticalsituation

tionbemaintainedandifthesetis notcom-

eratormustmaintainthesetin operationas

so.

7shouldbecheckedeachtimetheequip-

.

ecorrectmeterreadingonthepanel when

ndinoperation.

msrepresentgeneraloperatingcharacter-

atormustbecomefamiliarwiththecharac-

normaloperation;hemustusethatknowledge

changesinaudibleandvisibleindicationswhen

operly.

kedwheneverthestationistakenout

alindicationsatthistimeare probablycaused

houldbecorrectedbeforethenext expected


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ANCECHECKLIST.


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8/21/2019 TM 11-617 1945 AN.TRC-7


ANCECHECKLIST(contd).

.


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8/21/2019 TM 11-617 1945 AN.TRC-7


CE

CETECHNIQUES

TIVEMAINTENANCE.

sasystematicseriesofoperationsper-

sonequipment,whenturnedoff,to eliminate

nwantedinterruptionsinservice,andtokeep

ttopefficiency.Tounderstandwhatismeant

ce,itisnecessarytodistinguishbetweenpre-

ubleshooting,andrepair.Theprimefunction

eistopreventbreak-downsand,therefore,

otherhand,theprimefunctionoftrouble

ocateandcorrectexistingdefects.Theim-

aintenancecannotbeoveremphasized.An

municationdependsuponeachset'sbeing

edanduponits operatingefficiently.Itis

tthatradiooperatorsandrepairmenmain-

rly.SeeTBSIG123,PreventiveMaintenance

lEquipment.

ctionsVIandVII arefirstandsecondechelon

ndrepairmen)maintenance.Someoperationsin

onmaintenance.

VENTIVEMAINTENANCE

tricalpartsused inRadioSetAN/TRC-7

emaintenance.Thoserequiringmaintenance

d required.Becausehit-or-missmain-

otbeapplied,definiteandspecificinstructions

fthemanualcontainsthesespecificinstruc-

eforpersonnelassignedtoperformthesix

tionsnamely:Feel,Inspect,Tighten,Clean,


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oughoutthismanualtheletteringsystemfor

asfollows:

tablishtheneed fortheotherfour.Theselec-

on ageneralknowledgeoffieldneeds.For

teredondirtroadsduringcross-countrytravel

omatterhow muchcareistakentoprevent

er(suchasheavyrain followedbyblistering

ss,snow,andicetendtocausecorrosionof

ts.Withoutfrequentinspectionsandtheneces-

ening,cleaning,andlubricatingoperations,

ependableandsubjecttobreak-downwhenthe

.

s usedmostoftentocheckrotatingma-

otors,drivemotors,etc.,andtodetermineif

shings,etc.,areoverheated.Feelingindicates

he existenceofsimilartypesofdefectsre-

intenancemanmustbecomefamiliarwith

peraturesofmotors,etc.,inorderto recognize

he feeloperationbeperformedassoon

nandalwaysbeforeanyothermaintenance

emostimportantoperationin thepre-

gram.Acarelessobserverwilloverlookevi-

thoughthesedefectsmaynotinterferewith

ment,valuabletimeandeffortcanbesavedif

theyleadtomajorbreak-downs.Makeevery

lyfamiliarwithindicationsofnormalfunction-

ethesignsofa defectiveset.Inspectionconsists

artsofthe equipment,noticingtheircolor,

iness,etc.Inspectforthefollowingconditions:

tedbydiscoloration,blistering,orbulg-

ofthecontainer;leakageofinsulatingcom-

metalcontactsurfaces.


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8/21/2019 TM 11-617 1945 AN.TRC-7


ngthatallleadsand cablingareintheir

yexaminingallrecessesintheunits for

eciallybetweenconnectingterminals.Parts,

ouldbefreeofdust,corrosion,andother for-

high-humiditylocations,lookforfungus

yconnectionormountingwhichap-

ust.Theseoperationsareself-explana-

tobefollowedinperformingthemaregiven

ughoutpartthree.

andnutsshouldnotbetightenedcare-

eyondthepressureforwhichtheyare

orbroken.

eferstotheapplicationofgreaseoroil

r otherrotatingshafts.Itmayalso meanthe

doorhingesorother slidingsurfacesonthe

sforaccumulationofdirtandfor cor-

ubes intheirsockets.Makethein-

besdownin thesocketsandtestingthemin

rtially withdrawingthetubesandjiggling

vementofa tubetendstoweakenthepins

sarilyspreadthecontactsinthesocket.Itis

cketsofthe tubesatthetimethe tubesare

oremoveatubefromitssocket,great

ar awarmtube.UseTubePullerTL-310/U

oose connectionstothetubesockets.

or corroded,cleanthembeforetightening.

y ifinspectionshowscleaningtobe

ngatlowvoltageandnothavingexposedgrid


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requirefrequentcleaning.However,donot

onlow-voltagetubes.

om theglassenvelopeswithaclean,

cleanedandthe contactsareaccessible,

edtor emovecorrosion,oxidation,anddirt.

1large fixedcapacitorsforcorrosion

refullyinspectthemountingstodiscoverloose

rbrackets.Examinetheleadsforpoorinsula-

dencesofdryrot. Frayedstrandsonthe

ay.Ifthe wireisexposed,wrapitwith fric-

the capacitorsshouldnotbecrackedor

caseofeachlargefixed capacitorfor

ration.

ariablecapacitorsfordirt,dust,orlint.

ofplatesforsigns ofdamageormisalignment

ouchthefixed platesduringtuning.Rotate

the.tuningcontrol,andthus checkforproper

.

eterminals,mountings,andconnections

vertheyareobserved.Donotbreakthebush-

capacitors,theinsulatingbushings,and

ons.Thecapacitorcasesandbushingscan

ry cloth,butifthedepositof dirtishard to

inadry-cleaningsolvent.

iablecapacitorswithasmallbrush,re-

ngsofvariablecapacitorsareusuallyof

catedandsealedatthefactory.Thesebear-

tionduringthe lifeoftheequipment.

ofresistorsareused inRadioSetAN/


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8/21/2019 TM 11-617 1945 AN.TRC-7


othevariousresistorsareeitherof thepigtail

oatingof thevitreous-enameledresistors

ping,especiallyatthe ends.Examinethe

torsforblistering,discoloration,andother

.Inspectleadsandallotherconnectionsfor

ness,andbrokenstrandsintheconnecting

ofallmountings.Donot attempttomove

ections,becausethereisdangerofbreaking

ntwheretheyenterthe bodyoftheresistor.

paired.

storconnectionsandmountingswhen-

sistorisallowedtoremainloose,vibration

ordamagethebody.

rswith asmallbrush.

dresistorsmustbekeptcleantoavoid

inals.Ordinarily,theywillbewipedwitha

irtdepositis unusuallyhardtoremove,use

edbodiescannotbecleaned.Discolora-

sbeen overloadingandoverheatingatsome

on.Thediscolorationisprobablyduetocircuit

lysisandcorrection.Trouble-shootingpro-

artfive.

ATORS,

usedin thehigh-voltageandr-fcircuits.

eramicmaterialwithaglazedsurface.An

itssurface,sodepositsofforeignsubstances

lyreducetheinsulationvalueof thebushing.

antthatall bushingsusedinthehigh-voltage

ently.

usedas supportsforhigh-voltageter-

ortankcoils.Theyare usedasmountingsfor

rcuitsandassupportsfor panelswhichmount

ofinsulatorbushingsthat areusedsolelyas


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ritical,buttheconditionofbushingsusedas

extremelyimportant.

hysicalconditionofthe insulatorbush-

withoutcracksorchips.It ispossiblefora

evelopfine-linesurfacecrackswheremois-

ulateandeventuallyformaleakageforahigh-

quently,thesurfaceofthebushings mustbe

racks.Asarule,thebushings areheldinposi-

othethreadedconductors.Thesecanbere-

cementisnotpossiblebecauseofa shortage

anthedefectivebushingthoroughlywithdry-

mesitisdifficulttoseedust onaglazedsurface.

emadebyslidinga cleanfingeracrossthe

uretobeused intighteningloosebush-

ver,oneprecautionmustbeobserved.Avoid

owntoo tight.Ifexcessivepressureis

amageorbreakageisalmost certain.Some-

ngstud boltsmaybefoundstrippedso they

onlysolutionisreplacementofthe entire

hingsareeasilycleaned.Neveruse

setheglazedfinishwillbedestroyed,thusper-

orbed.Acleanclothis usuallysatisfactory.

onthesurfaceof abushingarehardto

solvent.Afterthesurfacehasbeencleaned

carefullypolishedwithadrycloth.Other-

ventwillbeleft whichmayimpairtheeffec-

high-voltageinsulator.

malif:the exteriorisfreefromdirt or

burned,pitted,or corroded;thecontactsare

ed;themovingpartstravelfreely andfunc-

ner;theconnectionstothe relayaretight;the

dor torn;therelayassemblyissecurely

wsnosigns ofoverheating.

tectdefects.Thecontactsmaybeexam-

lightandmirror.


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oftherelayshouldbe checkedtomake

dstationarycontactsmakepositivecontact

heachotherwhentheycometogether.

ose connectionsandmountingscrews,

rceto damagethescrewortobreakthe parts

eexteriorofthe relaywithasoft

eanitwitha brushdippedindry-cleaning

nsarefound,theyshouldbeinspected.Ifthey

oveandcleanthemand replacecarefully.

alloy(palladium)contactsarecleaned

leanclothorpaperbetweenthemwhile

omecases,itmaybe necessarytomoisten

gsolvent.Useadrycloth orpaperstripfor

ed,orpittedcontactsmustbecleanedwith

gtoolandcrocuscloth.

lactionofeachswitchand,whileso

orcorrosiononallexposedelements.In some

oexaminethe elementsoftheswitchvisually;

ofthe switchbyflippingthecontrolknob.

hes81,82,S3,84,85, 86,812,S13,S14,

ndS22 toseeifthey areproperlylubricated

n.Inspectionis visual.Donotprythe leaves

otarymembersshouldmakegoodcontact

ers;andastheformerslides intothelatter,

rycontactleavesshouldbe visible.Switch

ngactionofcontactsusuallyremovesany

t.

eriorsurfacesofswitcheswitha stiff

cleaningsolvent.

ry,lubricatebearingsordetentmechan-

eservative,Special,U.S.ArmySpec.No.

ywithapipecleanerorsmallbrush.

cloth.Oilformsaninsulatingfilm;keep


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L1through L16forcleanlinessofthe

untingsupports.

coilmountingor connectionfoundloose

teningscrews.

formand coilwithasoftbrush. The

yperformingthefunctionofahigh-voltage

mepreventivemaintenancewillapplytothe

atorsandbushings.

ENTIOMETERS.

lconditionofrheostatsR17andR20.

ghtlyto theshaft,andtheshaftshould turn

supportsit.

ndmountingscrews,setscrews,andnuts.

bodyofthe rheostatsfordust,dirt,

es.

rtsfor dust,dirt,andcorrosion.

eassemblyormountingscrews.

sforcracks,breakage,dirt,andloose

screws.

nectionsformechanicaldefects,dirt,

escrews,lugs,andmountingbolts.

besuretoselecta screwdriverofcorrectsize;

sure.Removelooseconnectionsandclean

r corroded.

alblocks,whentheyrequireit,with a

y,useaclothmoistenedwitha dry-cleaning

d,theblockmustbethoroughlywipedwith

removethelint.


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ORS.

maleendsof theconnectorsforcorro-

mountingsfor cracksandlooseconnections.

oose andbrokenpinsandforproper spring

eand femaleendsoftheconnectorswith

eaningsolvent.Removecorrosionwith

pewithacleancloth.

/TRC-7arethelife linesoftheequipment.

ustbecloselyobserved.Equipmentoperated

movedonallkindsof roadssubjectscabling

ent.

ablesfor crackedordeterioratedinsula-

nat theconnectingandsupportingpoints,

whichplacesthecablesorconnectionsunder

sandimpropersupports.

ecableclamps,couplingrings,andcable

tionsoncableswhentheyaredirtyor

connectorswith#0000sandpaper.Itis

urfaceofthe connectorbecleaned.Noat-

emoveindividualprongsfrom cableplugs.

cateinstrumentsandmustbehandledvery

rylittlemaintenance.Theyareprecisionin-

annotberepairedinthe field.

ads andconnectionsofthemeter.Look

edconnections.Lookforcrackedorbroken

ovementofameteris extremelydelicate,its

affectediftheglassis brokenanddirtand

onnectionsfoundloose.Anyloosemeter

fordirt orcorrosionbeforetheyaretightened.

nnectionsrequiresaspecialtechniquebecause

lycrackthemetercase.


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anbecleanedwitha drycloth.Ifclean-

uld bedampenedwithadry-cleaningsolvent.

cleanedwithasmallbrushdipped indry-

smallpieceof clothdippedinthesolvent.

ention,andthenonly atinfrequentinter-

enecessarytotightenthemountingnut, clean

hespringtension.Removedirtwitha brush

removecorrosionwithapieceofcrocuscloth

ncreasespringtension,whennecessary.To

ytoremovethejackso thatthewatersealcan

contactaccesible.Checktheactionofthe

t.Becarefultokeepallsolderedconnections

one-typeplugsusePolish,Metal,Paste,Sig-

6.Aftercleaning,useacleandry clothto

remainingonthe plugs.

atingunitsareessentiallythesametype

andareinspectedandlubricatedinthe same

nitislocatedinthe handgeneratorhousing.

oSet AN/TRC-7operateswithcarbon

emotorframeand rideagainstasegmented

sandcommutatorsrequirepreventivemain-

w.

the commutatorsatregularintervals.

enoughto makefirmcontactwiththecom-

smusthaveadequatetensionandbe infirm

Thebrushcapsmustbe tight.Thecommu-

mooth.Thecoversand strapsmustbein place.

ushesandthecleaningof commu-

asks.Theoperatinglife oftheaveragebrush

urs,butitwill varytosomeextent,depending

orthebrush-coverstraps.Pressa

heexactwidthof thecommutator,against

hearmaturebyhand.


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eenburned orpitted,holdapieceof

stthecommutatorandturnit byhand.

istenedindry-cleaningsolventmay

irtand grease.

withcrocusclothandwipewith a

ratorbearingsaredouble-sealed.Do

eeth ofthegearsin thegeneratorfor

aredirty,cleanthemwitha pipe

edin dry-cleaningsolvent.

erallywithGrease,Lubricating,Spe-

onotleaveanyexcessinthegear case.

Preservative,Special,U.S.Army

ermeatedbearingsurroundingthestud on

ulleyassembly.Allowoilto penetrate,then

gisdouble-sealed.Donotlubricate.

ANDMOUNTINGS.

thevariouscomponentsofRadioSetAN/

heetaluminum,coatedwitholivedrabpaint.

utsideand insideofthecasethoroughly,

verydetail.Checkthemountingsandthe

panelforlooseknobs,switches,andjacks.

utsideandin,with acleandrycloth.Use

outall accumulateddirtanddust.Repaint

ratched,rusted,orchipped.

anelscrews,plugs,and controlknobs

ANDMICROPHONE.

uipmentareessentialtothe operationof

operatormust givethemthesamecareasthe


/ h t t p : / / w w w . h


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ternalsurfacesfor dirtandcorrosion.

onsaretightand thatplugsandjacksfit to-

sof theequipmentinaccordancewith

reviouslyforrelays,cords,jacks,cabinets,etc.

NDCONTROLKNOBS.

chesandresistorsfoundthroughoutthe

plingshaftsthatconnecttheseitemsto control

panel.It isimportantthattheseshaftsand

at alltimes.UsetheAllenwrenchfurnished

temswhenevertheyarefoundloose.Lubri-

controlshaftswith Oil,Lubricating,Preserva-

pecNo.2-120.

eth ofthegearsonthe gangswitches

rtorcorrosion.

redirty,cleanthemwitha pipecleaner

ry-cleaningsolvent.

AINTENANCE

performance,preventivemaintenancefor

ebrokendownintooperationsthatcanbe

eintervals.Inthissectionthe preventivemain-

medontheradio setatspecifiedtimeintervals

workcalleditems.Thegeneraltechniques

onoftheFITCALoperationsinperforming

onindividualpartsarediscussedinsectionVI.

sarenotrepeatedinthis section.Whenper-

enance,refertosectionVI ifmoreinformation

ngitems.Performallworkwiththepower

ent.Afterpreventivemaintenancehasbeen

theequipmentshouldbe putinoperationand

erformance.(Seepar.34,EquipmentPer-


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NEEDED.

eneededinperformingpreventivemain-

1orequivalent).

tool.

deralSpecificationP-S-661a.

stockNo.6G1516.

usedas acleaningfluidforanypurpose.

deralSpecificationP-S-661aisavailableasa

blishedsupplychannels.Oil,Fuel,Diesel,U.S.

B,maybeusedforcleaningpurposeswhendry-

and.Carbontetrachlorideor fire-extinguishing

ebase)willbeused,if necessary,onlyoncon-

ipment.

RADIOSETAN/TRC-7(fig.6).

bolts.

rscratches,chips,andblisters.Checkfor

panel.Replaceallknobsthatarechipped


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dust,rust,fungus,and otherforeignmatter.

tonexposedmetalparts.Usea dampcloth

trapsuse soapandwater.

fig.11).

110/TRC-7(fig.10).

0(fig.6).

moveBatteryBA-70fromReceiver-

NDCABLE(fig.16).

.

12).

urfaces.

crophone.


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3).

ugs.

osesleeveofaphoneplugby handonly.

(fig.14).

eveofPlugPL-68byhandonly.

ANSMITTER(fig.18).

movethereceiver-transmitterfromits

meters.

eptacle.


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s.

djustingscrewsonanytransformer.

NANCECHECKLIST.

summaryofthepreventivemaintenance

donRadioSetAN/TRC-7.Thetimeinter-

tmay bereducedatanytimeby thelocal

performanceoftheequipment,performthe

entlyascalledfor inthechecklist.The

whichoperationsarefirstechelonmain-

ionsaresecondechelonmaintenance.Opera-

etters ofthewordFITCAL.Forexample,if

he "Operations"column,theitemto be

(I),tightened(T),cleaned(C),and ad-


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cationOrderisprescribedforRadioSet,

instructionsaregiveninthepreventive

hismanual.

314/U.

ewdriverononeendandaninsert-type

r.Do notforcethetool;it breakseasily.The

iththereceiver-transmitterunit(fig.77).

TL-314/U.

U.

edtubepulleri sforthelarger tubesof

hesmaller.Pushthetube pullerdownover

up.Thetubewillcomeout easily.Donot

st onthetubes.

W/U.


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wwrenchisfurnishedwiththe equipment

obsandCHANNELSELECTORswitch

tedinthe leftrearcornerofthe tubeside

9 forlocationoftheAllenwrench.

parationofthis tool,seeparagraph104.

DFUNGIPROOFING

ANDFUNGIPROOFINGRADIOSET

giproofingisdeleterioustoRadioSetAN/

empted.

QUIPMENT


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ctoryperformanceofequipmentusedbyArmy

ervicesForceswillbereportedonW.D.,

atisfactoryEquipmentReport);byArmyAir

FormNo.54(unsatisfactoryreport).Ifeither

arethedata accordingtothesampleform

ON.

gnedtogivevoicecommunicationover

pproximately35miles.Thetransmitteris

ransmitsoneither oftwopresetfrequencies

Thereceiveris asuperheterodyneoperating

ange.

mplifiedblockdiagram.


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blockdiagramofthetransmitter.Oscil-

11are fedtothefirst triplerstage,V12.The

edtosecondtriplertubeV13 thentothe

eV14.Thedoubler-driveroutputisfedto p-a

beV15.ModulatorstagetubeV16modulates

late circuitandsuppliessidetonetothe

drivenbyspeechamplifiertubeV11.The

ppliedtotheantennathrough acoaxialcable.

mofthe receiversectionisillustratedin

nalis firstamplifiedinr-famplifiertube V1.

withtheoutputofharmonicamplifiertube

be V2.Thei-f(intermediate-frequency)out-

edinthethreei-f amplifierstagesandapplied

V6.The audiooutputfromthedetectoris

frequency)amplifierstages,tubesV6and

dset.Noiselimiter stagetubeV7aidsin

ystatic,andothersuddennoisepulses.

UNCTIONINGOFPARTS.

operationofthe receiversectionofRe-

TRC-7isgiveninparagraphs74to 85

ssedseparatelyandadetaileddescriptionof

telementisgiven.

QUENCYAMPLIFIERSTAGE.

r(fig.50) increasestheamplitudeofthe

applied tothemixer.Italso improvesthe

byprovidinganadditionalcircuitwhichis

hedesired signal.Unwantedsignalsarethus

eforereachingthe mixer.

ppliedthrough thecontactsofantenna

acitorC54toa tapongridcoil L1.The

of tube1AB5(V1)isdevelopedacrossthe

lL1andthetuning capacitor.Either

ethe circuit,dependingonthesettingof

switch.CapacitorC1isusedon channel1,

el2(odd-numberedcircuitelementsare

annel1andeven-numberedwithchannel2).

ationofcoilL1and thetuningcapacitoris

edesiredsignal,it presentsahigherim-

to anyotherfrequency;thevoltagecaused

eaterthanthatdueto anyotherfrequency


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6bypassestheintermediatefrequencyto

passedbycapacitorC17.

evelopedacrossthe plateloadimpedance

pacitorC34andthevariableinductanceinT2.

thamovablepowderedironslug toaresonant

citorC20isthebypasscapacitorforthe plate

ppliedthroughvoltage-droppingresistorR7.

sedbycapacitorC1S.Theoutputof thefirst

e secondi-fstagethroughcapacitorC21.

amplifier.

TERMEDIATE-FREQUENCY

ge(fig.53) issimilartothe first.TubeV4

sinthe firststage,theinputsignalvoltage

sistorR8and appearsbetweenthegridand

eswithzerobiasinsteadof witha-v-cbias

age,becausethegrid isreturneddirectlyto

orR8.Thefilamentis bypassedfortheinter-

pacitorC22.Theplateloadimpedanceistuned

hepreviousstageandconsistsof capacitor

nableinductanceinT3.Theplateis by-


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ACITOR

di-famplifier.

ndthescreen bycapacitorC22.ResistorR9

pingresistor.Theoutputof thestageis

plifierthroughcapacitorC27.

RMEDIATE-FREQUENCY

di-famplifierisappliedto thegridofthe

)through capacitorC27(fig.53).Thegrid

famplifier.

P u b l i c D o m a i n ,

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ird stagesareidentical.ResistorR1Oisthe

tageandis connecteddirectlytothefilament.

ycapacitorC29.Thescreenvoltageis ap-

whichis bypassedbycapacitorC30.

maryoftransformerT4.Theprimaryis

requencybyamovablepowderedironslug.

takenfromthesecondaryofthe transformer

etector.

ECTOR.

55)is thediodesectionofdiode-pentode

tageappearingacrossthesecondaryoftrans-

enthediode plateandfilament.Thediode

tthefilament,throughthe tubetothediode

aryoftransformerT4,throughresistorR12

el,andbackto ground.

signalvoltageatthesecondaryofthe

eplate ofthediodeis positivewithrespect

nducts.Thedirectionofcurrentflow is

toground.This causesanegativesignalto

.CapacitorC33bypassesthei-fcomponent

audiocomponentappearsacrossresistorR12.

dto thenoiselimitercircuit.

detectorandfirstaudioamplifier.


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»0.5 MEG

miter.

atpointCby therectifiedsignalisapplied

thegrids ofr-famplifiertubeV1 andfirst

ponentofthe signalisfilteredoutby the

4andcapacitorC31.Thevoltageappliedto

dependsontheaveragesignal strengthand

rate.CoilL15is anr-fchoke(fig.89).The

isobtainedfrom thevoltagedividermade

Anyincreaseinsignalstrengthcausesan

ason thegridsoftubesV1 andV3.Thegain

sreduced,andthesignalappliedto thediode

pondingly.

TERCIRCUIT.

fig.56) isdesignedtocutdownsudden

causedbynoiseimpulsesdueto staticor

ery.Undernormalsignalconditionstheplate

,isheldat anegativepotentialbythecharge

argedtothe averagenegativepotentialof

5)throughresistorR16.The timeconstant

apacitorC35andresistorR16 islongcom-

s,andthecapacitorholdsachargewhichfol-

tentialandnot theaudiovariations.The

d-cgroundpotentialbecauseoftheblocking

hediodecannotconductunderthesecon-


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odeispositivewithrespecttothe plate.Allof

re,appearsacrossresistorR17.

se isreceived,pointC(fig.55) isdriven

ativepulseiscoupledtothe noiselimitertube

ecathodeoftubeV7goesmorenegativethan

nducts.ResistorR17isthuseffectivelyshunted

hroughthediodeandcapacitorC35to ground

sepulse.Thenoisepulsevoltage,therefore,

esistorR17.

of extremelyshortdurationandendbefore

toanygreatextent.Atthe endofthepulse,

nduct,andthe capacitorlosesanychargedue

orR16.

O-FREQUENCYAMPLIFIERSTAGE.

alacrossresistorR17isapplied tothecon-

ctionofTubeJAN-1S5,V6,throughashielded

samplifiedintheplate circuitandappears

32.Theplate isbypassedforradiofrequency

pacitorC94actsasadecouplingcapacitorfor

reenvoltageisappliedthroughdropping

ssedforaudio frequencybycapacitorC37.

UDIO-FREQUENCYAMPLIFIER

-famplifieriscoupledfromthe plateof

amplifierstagethroughcapacitorC95(fig.

damplifierTubeJAN-3Q4,V10(fig.57),

CAPACITOR

da-famplifier.


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orsR30andR31in series.Thetubeisbiased

d biassupply.ThisinsuresClassA operation

hefilamentisbypassedforradiofrequency

8.

hroughthe primaryofoutputtransformer

estheplatesupplytoground.The primary

sshuntedby capacitorC96whichreduces

erat thehigheraudiofrequencies.Theturns

suchthattheimpedanceinthesecondary

otheprimaryso thattheimpedanceofthe

eplatecircuitof thetube.Thesecondaryis

0-ohmheadset.Thescreenvoltageissupplied

plyandis bypassedforafbycapacitorC99.

esecondaryoftransformerT5 iscon-

ughPHONESjackJ1on thefrontpanelof

ctinthe jackppensthefilamentcircuitsofall

the headsetplugisremoved.

SCILLATOR.

llator(fig.58)usesone sectionoftwin-

heoscillatoristhesourceof thelocalfre-

htheincomingsignalto producetheinter-

mc.Theoscillatorisconnectedina tunedplate

e resonantcircuitforthegrid.Thesetting

Rswitchdetermineswhichcrystalisin

2inchannel2.A fixedbiasof—4.5voltsis

ebiassupplythroughresistorR21.

dtothecrystalfrequencybymeansof

allelwith coilL4.Thecoilis equippedwith

hisadjustedat thefactoryandshouldneedno

onditions.Couplingbetweentheplateand

edthroughthegrid-platecapacitanceofthe

pacitorC43.Platevoltageof150voltsis

circuittocoil L4.Platecurrentisindicated

er switchissettoposition2. Theplateis

8.

passedbycapacitorsC39andC41.A

ctedacrossthefilamentsto allowenoughcur-

V7,asthefilamentsof thetwotubesarein

athodebypassforsection1-4ofthecathode

s currentthanthesectionoffilament


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GENERATOR.

e ofthecrystaloscillatorisappliedto

eneratortube,thesecondsectionoftwin-triode

hcapacitorC45(fig.58).Thegridis oper-

asof —7.5volts.ThegridleakresistorR24


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a highnegativebiastobe developed.This

rateClassC, insuringanoutputrichin

dtoresonatewitha harmonicofthefre-

This maybefromtheeleventhtothe

ependingonthecrystalinuseand thechannel

plishedbymeansofcapacitorC49 orC50in

lL5.Platevoltageof 150voltsisapplied

eplatesupply.Theplateis bypassedby

AMPLIFIER.

ofthecrystal oscillatorisappliedfrom

monicgeneratortoharmonicamplifiertube

ACITOR.

APACITOR.

nicamplifier.


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PACITOR

CAPACITOR

TLmil

illatorandspeechamplifier.

torC52(fig.59).Thistubeis apentodeoper-

tageis developedacrossresistorR25andis

ridandfilament.Thefilamentisbypassedby

47isplacedinserieswith thefilamentasa

fortubesV1,V2,andV9whichrequireonly

mentsupplyis 4.5volts.

andistuned toresonancebymeansof

evoltageisappliedthroughr-f chokeL13.

bypasscapacitor.Theoutputof thestageif

L2,theplatecoilof ther-famplifierstageof

geisappliedthroughvoltage-droppingresistor

capacitorC55.

LATOR.

or(fig.60)consistsof halfofTubeJAN-

nnectedinacrystal-controlled,tunedplate

heresonantcircuitforthe grid,Y3forchannel

egridis biasedto—6volts,—4.5volts from

1-5 onthefilamentwhichisobtainedfrom

mentoftubeV13.ResistorR35is thegrid-


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ltsis appliedthroughcoilL6.Theplate

talfrequencybyeithercapacitorC61orC62,

withcoilL6.Thecoilis providedwitha

eradjustmentofwhichenablesthetuning

quencyrangeofthecrystals.Thisadjustment

requiresnoattentionunderordinarycondi-

bypassedtogroundbycapacitorC64andthe

.Platecurrentisreadon meterM1whenthe

3.

TRIPLER.

smitteroscillatoris appliedtothegridof

ghcapacitorC63(fig.61).Thegridis biased

supplybattery.Anadditional1.5voltsis

dropinthe filamentoftubeV13.Thisbias

bein casetheexcitationfails.Thetotalfixed

dditionalbiasdevelopedacrossgridresistor

e tubetobegreatlydistorted,andtherefore

dtothethirdharmonicof theinputfre-

citorC65orC66in parallelwithcoilL7.The

ateloadcoil L7isthereforethreetimesthe

.Platevoltageof150voltsis applieddirectly

ttripler.


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pplywhichisbypassedbycapacitorC67.

hroughresistorR38whichtogetherwith

couplingcircuitforthe screen.Thefilament

59.ResistorR28actsasa shuntforthefila-

ess currentthantubeV11whichisin series

NDTRIPLER.

triplerstageisappliedto thesecond

68.PentodeTubeJAN-3A4(fig.62)isused

tsimilar tothefirsttripler. Afixedprotective

edthroughgridleakresistorR39.Thesignal

2isdevelopedacrossresistorR39andapplied

etubeoperatesata highnegativebiaswhich

armonics.Thegridisbypassedtogroundby

f coilL8inparallelwith capacitorC70

tunedtoresonancewiththethirdharmonic

equencyis,therefore,threetimesthatofthe

XEDCAPACITOR

ABLECAPACITOR

ondtripler.


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bler.

hatofthecrystal oscillator.Theplatesupply

C72and C83.Screenvoltageisapplied

resistorR41bypassedbycapacitorC69.The

pacitorC19and isshuntedbyresistorR40.

samefunctionasresistor R38inthefirst

LER-DRIVERSTAGE.

e(fig.63)consistsof acwin-triodeTube

nsofwhich areusedconnectedinparallel.The

isappliedtoonegrid throughcapacitorC74

dto theotherthroughcapacitorC101and

esistorsareused becausethecharacteristics

denticalandthesamebias voltageisnotsuit-

dresistors,eachtube operatesatitsmost

fectedbytheother.Aprotectivebias of—7.5

assupplybatteryand1.5voltsis obtained

entcircuitoftubeV15, makingatotalfixed

supplyisbypassedbycapacitor C87andthe

andC76.


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dtoresonatewiththesecondharmonic

e outputfrequencytothepoweramplifieris

plerand eighteentimesthatofthecrystal

150voltsis appliedthroughthemetercir-

ecurrentis indicatedonmeterM1when

position4.Theplatesupply isbypassedfor

torC75.TheplateloadconsistsofcoilL9 in

torC77orC78.

RAMPLIFIER.

er-driverisinductivelycoupledtop-a

).TubeV15is atwin-triodeconnectedina

uit.Thegridcircuitsaretunedby meansof

orC80inparallelwith couplingcoilL10.The

ecoilofthedoubler-driver.Aprotectivebias

roughthemetercircuitandresistorR43.The

torsaregrounded,thusfixing theelectrical

thecenterofcoilL10.Thisinsures theproper

rthetwogridsnecessaryforpush-pullopera-

passedforradiofrequencybycapacitorC44,

citorC86.

PACITOR

APACITOR

weramplifier.


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dbyplatetuningcapacitorC81orC82.

citorsinparallelwithplateload coilL11.The

egrounded.Platevoltageis appliedthrough

ontransformerT8,resistorR50,andthe

esupplyisbypassedbycapacitorC88.Plate

meterwhen themeterswitchissetto posi-

atefilterresistorwllieh aidsinisolatingthe

quency.-Theamplifierisneutralizedbyfeeding

84andC85sufficientout-of-phasevoltageto

edthroughthegrid-platecapacitanceofthe

toftheseneutralizingcapacitorsinsuresthat

placeintheamplifier.

ythe audiovariationinthevoltageap-

fcoilL11throughthesecondaryofmodulation

V15isappliedto theantennasystem

three-turncoilcloselycoupledtoplate-tank

uitiscompletedthroughcapacitorC89orC90

aswitchingrelayK1to antennajackJ5on

yK1 isoperatedbymeansofthe press-to-

one,theantennaisconnectedtothe trans-

90isused totunetheantennato resonance

ofthepoweramplifier.Byproperadjustment

etanktuningcapacitorC81or C82,aresistive

e platecircuitoftheamplifierandmaximum

tained.Theadjustmentofthesecapacitorsis

tthefactory.

nnajackthroughacoaxialcablewhose

sis theimpedancealsoofthecoaxialcablein

7whichconnectsquarter-waveAntenna

najack,andofAntennaAssemblyAS-

edanceoftheantennais50ohms,therefore

maximumpowerisappliedto theantenna.

the properlengthbyusingthe ruleonthe

oset.

HAMPLIFIER.

esonesectionof TubeJAN-3A5,V11,a

be isbiasedto—6 voltsbymeansof—4.5

and 1.5voltsonthefilamentfromthe drop


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3.Theinputisthe voltageinthesecondaryof

merT6.Micfls^honecurrentisobtainedfrom

adio setthroughthewindingofrelay K1and

rT6.Thusthe transmitterisconnectedtothe

press-to-talkswitchonthecarbonmicrophone.

miting resistorforthemicrophone.TheA

dforaudiofrequenciesbycapacitorC91,and

edforradiofrequencybycapacitorC100.

ondaryoftransformerT6isamplifiedin

rsacrosstheprimary oftransformer17

ltageof150volts isapplied.

LATOR.

esTubeJAN-3A5,V16,atwin triode,ina

ClassB(fig.65).A fixedbiasof—7.5volt?

ughaconnectiontothecenterpoint ofthe

nsformerT7.Anadditional3voltsis obtained

ssthefilamentsof tubesV14andV15.The

tubeV16is thevoltageinducedinthesecon-

he audiosignal,developedintheplatecircuit

wingthroughtheprimary.Sincethecenter

oundedthroughthe biassupply,the180°

ofthetwogrids,necessaryforpush-pullopera-

dulator.


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ulationtransformerT8formstheplate

tevoltageis appliedtothecentertapfrom

Theturnsratio oftheprimarytosecondary

oper ratiotoreflecttheimpedanceofthe

ycircuittomatchtheoutputimpedanceof

essaryformaximumpowertransferto the

voltagetotubeV15isapplied throughthe

ransformerT8.Theaudiosignalinducedin

formeraddstoor subtractsfromtheplate

fier,thusmodulatingtheoutputof theampli-

gnalisappliedthroughcapacitorC25and

of transformerT5toprovidesidetonetothe

UITS.

ver-TransmitterRT-53/TRC-7isfur-

rGeneratorG-3/TRC-7oracombinationof

settingof thePOWERswitchonthefront

o BAT.,thebatteryfurnishesallpowerfor

platesupply isconnectedtocontact9onthe

ughcontacts10and11tothe platecircuits

nsmitter(fig.66). The4.5-voltsourceis

thefrontsectionof theswitch,S21,through

rcuitsandcontact8 toantennaswitching

ne.

hisset toGEN.,contacts10,11,and12

connectedandthegeneratorsuppliesplate

randreceiver.Contacts6,7,and8 arecon-

ofthe switchwhichconnectsthegenerator

enintheCOMB,position,connectscon-

1to12on therearsectionofthe switch.In

rsuppliesplatepowerto thetransmitter,and

Thefront sectionoftheswitchconnectscon-

torsuppliescurrentforthe transmitterfila-

tterythroughcontacts5and6 suppliesall

yK1iscontrolledby thepress-to-talk

.Whenthemicrophoneswitchisoperated,a

he4.5-voltsupplythroughswitchS9,the wind-

ess-to-talkswitchtoground.RelayK1then


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F

ONE

ersupplycircuits.

4.5-voltcircuittotheprimaryofthemicro-

ngthefilamentsupplytothereceiver,andcon-

transmitter.Whenthemicrophonepress-to-

mentvoltageisappliedto thereceiverthrough

ckJ1.Thesecontactsareclosedwhenthe

thejack.ThereleaseofrelayK1 alsoopens

icrophonetransformerandconnectsthe

oughswitchS7-8in acircuitthatenables

dicatethecurrentin fiveseparatecircuitsas

ther(fig.89).Thevariouscircuitsinwhich

asfollows:

on 1,themeteris-connectedbetween

pplyin serieswith220,000-ohmresistor-R37.

ndicatesthevoltageoftheB supply.

erswitch,themeterindicatesthe voltage

istorR29,andthus theplatecurrentof


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position3,metershuntresistorR34 isacross

n theplateoftransmitteroscillatortubeV11

switchconnectsshuntresistorR33inthe

itterdoublertube V14.Themeterthenindi-

ubeV14.

ansmitterfinalamplifiergrid current

et toposition5.ResistorR48is themeter

entis indicatedwhenthemeterswitchis

shuntedbyresistorR45through whichthe

ows.

NCTIONING.

m.AcompleteblockdiagramofReceiver-

shownin figure67.Eachmajorcomponent

nectionstoothercomponents.Thearrowon

atethedirectionofthesignal throughtheset.

Thereceivedsignalfromtheantennais

neandthe contactsoftheantennaswitching

Theamplifiedsignalisapplied,togetherwith

amplifier,tothe gridcircuitofmixertubeV2.

theintermediatefrequencyof12meandis

fi-f amplification,tubesV3,V4,andV5.From

the signalisfedinto thediodedetectorwhich

mitertubeV7is adiodewhichshuntssudden

staticorignitionnoise,to ground.Theaudio

ctoris thenappliedtotheamplifiersection

urtheramplified.TubeV10 isthefinalaudio

oughthis stage,thesignaliscoupledto the

8iscrystal-controlledandfurnishestheinput

whichusestheotherpart ofthesametube.

operatedwithahigh negativebiasandthe

monics.Theplatecircuitoftheharmonicgen-

nic11to17 timesthefrequencyoftheoscil-

monicgeneratoris amplifiedinharmonic

dappliedto thegridofthe mixertubeV2

ereceivedsignalto formtheintermediate

g.Thefrequencyofthetransmittedsig-

cillatorstagewhichusesonesectionoftube


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na crystal-controlledtunedplatecircuit.The

applied to-firsttriplertube V12wherethe

hreetimesthecrystalfrequency.Second

nmultipliesthe inputfrequencybythree.The

ris fedtothedoublerstage whichconsists

odetubeV14operatingin parallel.Thefre-

lfromthe secondtriplerisdoubledin this

fthedoubler istherefore18timesthatof the

putdrivesthep-astage.This stageconsistsof

eratingina push-pullcircuit.Theamplified

lifieris fedtotheantennathroughthe con-

hingrelaywhenthepush-to-talkswitchon

d.ThetransmitterismodulatedbyMicro-

edevelopedinthemicrophoneisamplifiedin

ifierstage.Theoutputof thespeechamplifier

getube V16operatingpush-pull.Voltage

uitis appliedtotheplateof tubeV15,the

modulatesther-fsignalto theantenna.Apor-

modulatorisfedto theheadsettofurnish

OOTINGINFORMATION.

mentisdesignedand manufactured,faults

hfaultsoccur,therepairmanmustlocateand

possible.Thissectioncontainsgeneralinfor-

gagedinthe importantdutyoftrouble

Takeadvantageofthematerialsupplied

erapid locationoffaults.Consultthefol-

atawhennecessary:

SetAN/TRC-7(fig.67).

agram(fig.89).

hematicdiagrams.Thesediagramsare

eshooting,becausetherepairmancanfol-

ngofthecircuitsmoreeasilythanon the

peedingtroublelocation.

dataforall socketconnections.


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ents.Front,top,andbottomviews

entifyingparts.

nnectionsonsockets,plugs,andre-

rletteredonthevariousdiagrams.

pin connectionsarenumberedina

dthesockets.Onoctalsocketsthefirstpin

yispinNo.1.

renumberedonthe sidetowhichthe

tached.Toavoidconfusion,someindividual

s whichappeardirectlyontheconnector.

.Thefirststepin servicingadefective

ethefault.Sectionalizationmeanstracingthe

ircuitresponsibleforthe abnormaloperation

istolocalizethefault.Localizationmeans

fectivepartresponsiblefortheabnormalcon-

burned-outresistors,r-farcing,and shorted

tedbysight,smell,andhearing.Themajority

elocatedbycheckingvoltageandresistance.

odoflocalizingfaultswithintheindividual

below.Theseparagraphsareaccompaniedby

hichlistabnormalsymptomsandtheirprob-

sogivetheprocedurefor determiningwhich

fthefault istheexactone.In addition,there

whichshowthe resistanceandvoltageatevery

.Voltagemeasurementsareanalmostin-

irman,becausemosttroubleseitherresult

rproduceabnormalvoltages.Voltagemeasure-

causetheyarealwaysmadebetweentwo

circuitneednotbei nterrupted.

fied,thevoltageslistedonthe voltage

eentheindicatedpointsandground.

the voltmeteronthehighestrange

ot beoverloaded.Then,ifitis necessaryto

y,setthevoltmetertoalowerrange.

ltage,rememberthatareadingcanbe

eresistorisactuallyopen.Theresistanceof

thoderesistor.Thus,thecathodevoltagemay

onlyaslongasthe voltmeterisconnected


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und.Beforethecathodevoltageismeasured,

withacoldcircuittodeterminewhetherthe

hVoltage.Certainprecautionsmustbe

voltagesaboveafewhundredvolts.High

dcanbefatal.Whenit isnecessarytomeasure

efollowingrules:

dto thevoltmeter.

rpocket.Thiswilleliminatethepossi-

contactwitheithergroundoranotherpart

he electricitytotravelfromonehandto

300 volts,connectthetestleadtothe

eeitherpositiveor negativewithrespectto

ssentialthatthe voltmeterresistance

eas theresistanceofthecircuitacrosswhich

the voltmeterresistanceiscomparabletothe

meterwillindicateavoltagelowerthanthe

enthevoltmeterisremovedfromthecircuit.

ltmeteron anyrangecanalwaysbe

gsimplerule:Resistanceofthevoltmeter

ultiplied bythefull-scalerangeinvolts.For

ofa1,000-ohm-per-voltmeteronthe300-volt

= 1,000ohmspervolttimes300 volts=

terloadingin high-resistancecircuits,

ange.Althoughonlyasmall deflectionwillbe

visionsona 100-divisionscale),theaccuracy

entwillbeincreased.Thedecreasedloadingof

ncompensatefortheinaccuracywhich

small deflectiononthescaleofthevoltmeter.

adingacircuit,theeffectcanalways

evoltagereadingon twosuccessiveranges.If

etworanges donotagree,voltmeterloading

notthedeflection)onthe highestrangewill

elowestrange.Ifthevoltmeteris loadingthe

ionofthepointerwillremainnearlythe same

edfromone rangetoanother.


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8/21/2019 TM 11-617 1945 AN.TRC-7


tivityofthevoltmeterusedto obtain

hevoltageandresistancechartsin thismanual

e ameterhavingthesameohm-per-volt

lbenecessarytoconsiderthe effectofloading.

entisusedto repairRadioSetAN/TRC-7.

nt.

81/TRC-7.

/U.

yCordCX-240/U.

-7,sparetubes.

ordCG-127/U.

iscellaneousTools.

ga12.0-mcoutputsuchas SignalGen-

atorhaving100to156-mcoutput,suchas in

eterandohmmeter,range0to150volts,

ms.

pto150volts.

l tip.

air.

r.

PROCEDURES.

-7becomesdefectiveorinoperative,the

atedtoeitherthe controlcircuitsorto

3/TRC-7.Totestfortroubleinthe control

5andPL-68fromPHONESandMIC.jacks


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eiver-TransmitterRT-53/TRC-7.Plugthe

orhandsetdirectlyintothesejacks.Ifthe

perateproperly,thetroubleisin oneofthe

nnectingcord.If troublestillisapparent,the

gprocedureshouldbeadopted:

umecontrolisturnedon.

55is pluggedallthewayintothe

PL-68ispluggedall thewayintothe

rophoneareused,replacewiththe

etheparticularunit usedmaybedefective.

teryplugcontactsarecleanandplugged

eunitpush thepush-to-talkswitchon

t.Iftherelayis operatingproperly,aclick

itchisclosed,andagainwhenitis open.

ativebecauseofarun-downbattery,

acewithafreshunit.I fthemeterselector

inposition1whenthe setissealedin the

t panelgivesanindicationofbatteryvoltage.

than one-halfscale,thebatteryvoltageis

70shouldbereplaced.

oubleby examiningtheequipmentcare-

ects.Toanalyzeandinspectwithouttestequip-

mthecaseand examinethewiringfor

ons,damagedwiring,partsshortingagainsteach

scase,and badsocketsorsocketconnections.

crackedorbroken,andthat theyareplugged

ersockets.Anytubeexhibitingamilkycolor

nvelopecanbeassumedtobe bad,either

hecrackis notvisible.Suchatubeshouldbe

ntpartsforthosewhichappearabnor-

citors,charredorbrokenresistors,broken

etc.

ontinuitytesterisavailablereplacethe

substitutetubeknownto beingoodcondition.


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8/21/2019 TM 11-617 1945 AN.TRC-7


0tothesetby meansofCordCX-

tto beoperatedwhileoutofits case.

nentsforsignsof excessiveheating.

partthroughwhichexcessivecurrentis

rong odor.Examineforthepresenceof

sashortedresistorwillshowheat byablister-

sitionandthesetturned on,listenfor

,fading,etc.

ationisidealforcorrectoperationof

thcorrectantennaposition,nohigh tension

nity,etc.

to localizethetrouble,testequipment

ETHODS.

s.

ontinuitywithanohmmeterunlessthe

less thereisanindicationthat oneor

dtotakevoltagemeasurementscover

esothatonlythe pointisexposed.Thispre-

BatteryBA-70alwayscheckforshorts

ehigh-voltageprongsonthe powerinput

ghresistanceofatleast500,000ohms.

et theoperator'sreportonthetrouble,

on thisreport.

mentofsetbeforeremovingcircuit

or circuitelementuntilthecausefor

menthasbeendeterminedandcorrected.

autionmayresultin almostimmediate

ehasbeen localizedtoonesectionofthe

ofind theexactpartcausingthetrouble.To


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blesofnormalvaluesofresistancesandvolt-

s68 and69respectively.Resistancetables

etweensocketcontactsandgroundandbe-

ndarefurnished.Voltagetesttablesare sup-

voltagesfromallsocketstoground,and all

titution.Signaltracingandsignalsub-

ocalizetroublethatcannotbefoundbyvoltage

rfurtherinformationandinstructionsinthe

olvedin resistanceandvoltagemeasurements

ndother instrumentsusedinsignaltracing

ertothe technicalmanualssuppliedwith

N/TRC-7isequippedwitha meteron

ybeinsertedinto anyoneofsixcircuitsin the

tionselectorswitchmountedonthechassis.

hemeterasfollows:

current

cecurrent

meterfor thevariouspositionsareasfollows:

shouldbereplacedwhenmeter

thanhalfscale)

rsfullscale

tlyoffscale)


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GCHARTS.

e-shootingcharts,ifproperlyused,simplify

tsarearrangedintwo groups.Thefirstgroup

bletothe variouscomponentsandcircuit

ethatotherwisemightbelost inchecking

oftrouble.Thesecondgroupof charts(figs.

esistanceandvoltageatvariouseasilyreached

ables therepairmantorapidlycheckvarious

ts.

Realign.


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8/21/2019 TM 11-617 1945 AN.TRC-7


GCHARTS(contd).


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8/21/2019 TM 11-617 1945 AN.TRC-7


GCHARTS(contd).

bleCorrections

Replacecontacts.


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8/21/2019 TM 11-617 1945 AN.TRC-7


GCHARTS(contd).

bleCorrections

Defectivetransmitter12.Checkandreplace


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


ections.


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nelsuppliedwithadequatetoolsandinstru-

rviceandrepairthis equipment.Aninexperi-

gtomakerepairswhichshouldbemadebya

ydamagetheequipmenttosuchanextentthat

erechelonforrepair.

ementofdefectivepartsorcircuitelements

cult;greatcaremustbe takentoavoidfurther

enewpartbeing installed.Beforeattempting

toobtainthepropertools forthejob.

rytoremoveother circuitelementstogain

rt.Arecordshouldbe madeoftheconnection

anditspositionin aset.Tageachwirethat

he wirecanbereturnedtoits original

possibleand avoidusingmoresolderthan

dsecureconnection.Theslightestamountof

edinsidethesetcancauseashort circuit.

ensoldering.Donotheatlugsor connections

cessary.Excessiveheatdamagesnearby

orms,andwiring.Whenconnectingawiretoa

genoughto preventpullonthesocket.Before

arsto bedefective,makeathoroughelec-

helocationofpartsorwiringleads;

oscillationsmayresult.

ssemblingandreassemblingmechanical

butdonot overtightenthem.

S.

is essentialinthemaintenanceofsignal

mly.Donotdropor jarthemagainstbreak-

ldroppedonthe chassisofReceiver-Trans-

amagetubes,resistors,orotherdelicate

wires,cables,connections,orcouplingsun-

espaceforworkingona partbycarelessly

whicharein theway.


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8/21/2019 TM 11-617 1945 AN.TRC-7


rapidlyandefficientlywithwell-kepttools.

pleted,wipethetoolswithaclothslightly

ionallyoilthehingerivetsofpliers andsimi-

rkingfreely.Inspectthehandlesofdriving

ghtandfreefrom chipsandsplinters.When

ongtime, coverthesurfaceswithheavygrease

e.Donot usethinoilbecauseits tendency

moisturetocorrodeor rustthemetal.

OLDERINGTIP.

nessofReceiver-TransmitterRT-53/TRC-7

nd unsoldercertainparts.Toperform

sewithclosequarters,reshapea standardsize

elpoint(fig.47).

DREPLACEMENT.

mitterRT-53/TRC-7inthechassiscaseby

tchesoneithersideof thefrontpanel.Remove

ecase,supplypowerby pluggingCord

andconnectingtotheset.Set maythenbe

ase.

vailable,checktubesbyreplacingthem

rtubeknowntobein goodworkingcondition.

bes.Ifthetroubleisnot causedbyaburned-

attemptfurtheranalysisunlesscompletetest

hencheckingtubesbythismethod,alwaysbe

cementforthetubein questionisused.Check

umberofthetuberemovedfromthesocket,

newtube withthetypenumberstampedon

utis showninfigure80.Toremovea tube

hield,twist itslightlytothe left,andliftit

placetheshield overthetube,lineup the

down,andtwistitto therighttolockit in

tbereplacedbecauseit preventsinteraction

stoholdthe tubesintheirsockets.

HTESTSET1-56-().

), consultthefollowingtechnical

formation:

nd -JTM11-303


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ANDREPLACEMENT.

puttingthemeter selectorswitchinposition

hanhalf-scale(fivedivisions),thebatteryhas

dmustbe replaced.BatteryBA-70isreplaced

sthat holditinplace,lifting thechassiscase

ngitwith anewone.

HANNELSELECTORSWITCH

eandplaceitbottomsideup. UsingtheAllen

hexagonalscrewsinshaftcouplingofshaft

ereplaced.Slideshaftout throughwaters

rystalsockets.Unsolderwiresfromwafer,

er,andremovewafer.Toreplace,followabove

assembly.

ACKS.

e.Openjackplugandremovewireringhold-

emovethegasket,thenthenut holdingthe

enutandjackisfree.To replacefollowpro-

aretomakeall surfacestightandwaterproof

THERPARTS.

accessible.Beforeremovingsomepartsit

ethegangswitchshaft andsomeofthewafer


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8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


topofthecabinetbecomesobliterated,it

gtofigure 72.

REPAINTING.

sbadly scarredordamaged,therepairman

edsurfacestopreventrust andcorrosion.

per,cleanthesurfacedownto thebare

ghtandsmooth.Applypaintwitha small

woolisnot recommended.Although

small particlesofmetalwhichoften

rnalelectricalshortingor grounding

ob isnecessary,proceedasfollows:

mthecase.

onwithdry-cleaningsolvent.

ndpaper,cleanthesurfacedowntothe

isbrightandsmooth.

aseusinga paintwhichisauthorized

UIPMENTREPORT.

entusedby ArmyGroundForcesorArmy

reoftenthanrepairpersonnelfeelisnormal,

actoryReport,W.D.,A.G.O.FormNo.468

rwardedthroughchannelstotheOfficeofthe

ington25,D.C.

entusedby ArmyAirForcesoccursmore

elfeelis normal,ArmyAirForcesFormNo.

dforwardedthroughchannels.

lable,FormNo.468(fig.73)maybe re-

orwardedthroughchannels.WhenArmyAir

redbut unavailable,reproduceFormNo.

channelsin accordancewithdirectionson


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8/21/2019 TM 11-617 1945 AN.TRC-7


MENTREPORT

JTIVECOMPONENT

Ciuf«WUHJTFT-Z434.30O

EAMDPROBABLECAUSE

TRiCAi.WORKMANSHIP.MATERtALO

J.(oiccxOMK]

wiflu.ic.qvtc*M<4ttiOchfoKi«."-HmcoP^c^uftLcKutx.

XXOomcnt

hlelelTechnicalService

mentaf anvaatutnicttaaal,dee*jn,arapera'

mli deeJanedtoiacilttoteychrepart,andto pi

erequireddi'

epartngmauuiacturing,de*ifnaraperatlaBaI

ewto lmpraiinaandcanectlnginchdetecn,andlar

bcanancafmattrnl

dlarrepartingta^*IM,t»lQtedmaterialdefecteat

pair,ar theleiaealpartiand equipment.ttdaMnat

daperaHanal01pntarmancerecordi.

ndaaakUnHiBvahrlaanmmnnmanwilloanttniie

tnthemannerdeearlbedlnAB 78O-10(Cnua«

t

ardMlrabletn

epart-iauldbe

Hveactian./''

pacMikauldtw„__ _

«illuttativ.mat.rial

ento

y

TUelamihaulibeueedti

utbyudnaar wrvlaeargaatoattaaeiandfcniiiii.»*

andchannelitolhe chlelaltechnicaleerriae.Tke

inaGeneial,ArmyGraundFaraeearArmyAir Faraw

adtatheCcmmaadlngGeneral,ArmySerrtreFun™.

rm willbedeterminedbytheuitng areeniaeUi^

EquipmentReport.


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8/21/2019 TM 11-617 1945 AN.TRC-7


MENT

EIVERSECTIONOFRECEIVER-

-7.

mentprocedurerequiredonthereceiver

otheradjustmentsaregivenin paragraph117

wingequipmentisnecessarytoalignthe i-f

capableofprovidinga12-mcsignal modu-

y,anoutputmeter,and AlignmentTool

-()maybeusedifno outputmeteris

susedtoconnectthechassistothe battery

edfromthecase.

mthecaseby releasingthefourclamps

ORreceptacleonthechassistothe

U.

tertothe PHONESjackorpluginthe

ilable.

orto12memodulatedbya 400-cps

frequency,andconnecttheoutputbymeans

arad)capacitortotheplateoftubeV4(pin

dofthe signalgeneratortothechassisof the

tingthePOWERVOLUMEcontrol

mvolume.

esignalgeneratoruntilthetone inthe

runtil thereadingoftheoutputmeter isvery

ed,adjustthesignalgeneratorformaximum

turn thescrewprotrudingfromthe

fig.77)until theoutputatthe PHONES

utputsignalincreasesin volume,theoutput

uldbe decreased,keepingtheoutputvolume

atorto pin2oftube V3andrepeatthe

nd(7) above,tuningthecouplingimpedance

t.


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8/21/2019 TM 11-617 1945 AN.TRC-7


durewiththesignal generatorcon-

V2(pin2),andtune coilT2formaximum

neratortothe plateoftubeV1(pin 2),

mumoutput.Now,withthesignalstillcon-

ransformerT4,coilT3, coilT2,andcoilT1

btained.Thei-fstages arenowaligned.

TRANSMITTERPOWER

pacitorsC84andC85areadjustedatthe

oattentionin thefield.Ifit isknownthat

adjustment,thefollowingproceduremay

cy.

re.

nga crystalcorrespondingtoafre-

.Followthemethodoutlinedin paragraph116

platecircuitofthe poweramplifierbychang-

tuning capacitorC81orC82fromthe

adingonthemeterwhenthe meterswitchis

themeterswitchtoposition 5.Themeternow

nalamplifier.

rplate tuningcontrolcapacitorC81

deflection.

e oftheTuningToolTL-314/U,adjust

rmaximummeterdeflection.

ntsof(2)and(3) above.

gofthetransmitterbyfollowingthe pro-

116onpresetting.

ETTING,

Receiver-TransmitterRT-53/TRC-7

sandcarefullyslidingthe unitoutofthe case.

sionand shortsonatube tester.


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8/21/2019 TM 11-617 1945 AN.TRC-7


nsmitterRT-53/TRC-7toBattery

oftest CordCX-240/UintoBatteryBA-70

generatorreceptacleonthefrontpanelof

or MicrophoneT-45andHead-

.andPHONESjacksonthefrontpanel.

ngthePOWERswitchto BAT.and

MEswitchclockwisefromtheOFFposition.

heANTENNAsocketandplugin

/TRC-7.

Stages.

cillator.

insert acrystalintoTRANS.

2inthe rearofthechassis(fig.77) and

TORswitchonthefrontpaneltothe

alhasbeeninserted.

witch(foundat thereartopof

3 (transmittercrystaloscillatorcurrent)

lkswitchonHandsetH-23()/U

rotateeithercapacitorC61orC62(upper

,fig.79)untila slightriseinoscillatorplate

nelmeter.

pler,andDoublerStages.

adjust trimmercapacitorsC65,C71,

approximatefrequencyascalibratedoneach

annel2,adjusttrimmercapacitorsC66,C70,

oximatefrequency.Thesecapacitorsare

de ofthechassis(fig.79).

witchto position4(doublerplate

ondtripler tuningcapacitorC70or

ect,thedoublerplatecurrentmaybepeaked

te tuningcapacitorC65orC66formaximum

atetuningcapacitorC70or C71for

atedbythemeter.

ingcapacitorC77or C78formini-

bythemeter.


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8/21/2019 TM 11-617 1945 AN.TRC-7


er-amplifierStage.

chtoposition5 (r-fp-agridcurrent).

capacitorC79orC80formaximum

chinposition5, readjustcapacitors

81,orcapacitorsC66,C70,C78,C80,and

.

witchto postion6(p-aplatecurrent).

ningcapacitorC81orC82formini-

atedonthe panelmeter.

pacitorspreviouslyadjustedformaxi-

mAntennaTS-281/TRC-7.

mentofantennatuningcapacitorsC89

oryandshouldnotbedisturbed.

NG,

mthecaseby openingthefourclamps

itout ofthecase.

X-240/Uintothebatteryandtheother

ceptacleonthefrontpanelofthe set.

al,intoeithertheREG.CHAN.1or

endinguponwhichchannelistobepreset.

hecrystalis determinedfromthefollowing

ncyinkilocycles

ereceivedin megacyclesand

thefollowingtable:


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8/21/2019 TM 11-617 1945 AN.TRC-7


CTORswitchtothechannelin

inserted.

pacitorC46orC47 formaximumca-

d).UsealignmentToolTL-314/Uforthis

ments.

ceivertuningcapacitorsC1,C7,C49,

d C56approximatelytothedesiredfre-

ecalibrationmarkedoneachcapacitor.The

nechannel1andtheeven-numberedcontrols

()/UorHeadsetHS-30().

position2.Turnreceiveron.Themeter

cillatorplatecurrent.TurnC46orC47,de-

isbeingpreset,slowlyuntil apointisreached

uddenlyincreases.Atthispointthe oscillator

rnthe tuningadjustmentbeyondthepoint

esabouttwo-thirdsfullscale.Turningthe

sethemeterindicationto reachapeakand

aysmaintaintheadjustmentonthehigh-

nal GeneratorI-130-A(partofTest

antennareceptaclebymeansof Cord

tortothemodulatedposition,turnon,and

tely15minutes.Setthe generatortothe

ximumoutput.

Econtroltotheminimumposition

signal.

atorplatetuningcapacitorC49orC50

ardin theheadphones.

fierplatetuningcapacitorC56orC57

ardin theheadphones.

e signalgeneratorsothattheoutput

yaudibleat alltimes.

etuning capacitorC6orC7formaxi-

tuningcapacitorC1orC2formaxi-

eratorfromsetandreplacechassisin


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8/21/2019 TM 11-617 1945 AN.TRC-7


TSFORRADIOSETAN/TRC-7.

wascompiledon23February1945.The

eASFSignalSupplyCatalogforRadioSet

s,when

s

s,

s,

s,

s

s,

s,

adioSetAN/TRC-7.

on

U:blackbakelite;4V

sulatedscrewdriveronone

ewdriverpinNo.1004on

271-3103.

ectionalized;30'high;

undelements.

hip;tubularsteel;tele-

ed,15%"collapsed,0.14T

847,specNo.271-3103.

C-7:olivedrabfinish;

,specNo.271-3103;(with

tionofPlugPL-259,and12*

PL-259).


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


adioSetAN/TRC-7.

on

y-NavyJftantomAntenna

No.271-3103;(PlugPL-

escrew-typesocketacross

0-mapilotlamp).

s,olivedrabfinish;14%"

dding1" thk;SigC

ceiver-transmitterandac-

s;olivedrabfinish;37"lg

pecNo. 271-3103;(for

.

s;olivedrabfinish;12%"

specNo.271-3103;(for

cessories).

able;metalcan;1.5-v;

m;(forRemoteControl

v;Cbatterybias;Pen-

it4.5-v,BunitNo.160v,

ular;7%"hx10" wdx

CCordCG-127/U;

CableRG-5/U;SigC

thPlugPL-259oneend,

d).

SigCCordCX-220/

5ftlg;3-cond;shielded;

;(withAN-3106-14S-7S

-3106-16S-5Pconnectoron

eratortoreceivertrans-

SigCCordCX-240/U;

gCdwg No.SC-D-14127;

oneend,femaleplugon

num;empty;forspare

x2%"h;SigC dwgNo.

t;RC;%"diamx65"]g;

ercond;SigC dwgNo.

105;(withPlugPL-55one

ne;RC;SigC specNo.71-

withPlugPL-68on one

BwithJackJK-55on one

5).

C;round:0570"diam;6

o.71-1525:(withtrans-


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


adioSetAN/TRC-7.

on

7"throw;(forGenerator

quartz;single-wafer;

gcrystal).


gcrystal).


.


.

andoperated;23-w;

vdc,2-wirehvside;

thgearchain;4Vi"Igx 3"

1-3169;(inclosedinwater-

"wdx7Vh).

ne;transmitterimpedance

nce250ohms;blackphe-

3-15/16"d;perSC-D-

D-494andPlugsPL-55and

one;transmitterimpedance

rimpedance250ohm-

x2%"wdx 3-15/16"

57,dwgNo. SC-D-14651;

magnetic;approx250

iamx0.68"h;headband

nsert M-300;SigCspec

be;withaluminumplate

denseat16"Ig x6"wd,

tube;31%"Ig over-allx

ecNo.71-512;(usedwith

be;withaluminumplate

tube tapered;22-11/32"

No.71-513;(usedwithgen-

n;liptype;mountsby

71-1603.

ale;oneprong;bakelite;

dwgNo.SC-D-4213;

eshell,includestwoEby

M-52:receiver-trans-

Kx4-7/16"hx 2-13/16"

49,specNo.271-3043.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


adioSetAN/TRC-7.

on

as;olivedrabfinish;for

x8"h;withshoulderstrap;

one;steel;blackenamel

"h x13/32"d;SigC

;(forMicrophoneT-45).

eel;olivedrabenamel;

dEng LabdwgNo.

x1/16"diam;Lshaped;

pecNo.271-3103.

-53/TRC-7.

retlug;laminatedphenolic;

6"thk;InsulineNo.

ugs;laminatedphenolic;

neNo. SK-13-33.


"thk;InsulineNo.


16"thk;InsulineNo

ugs;laminatedphenolic

InsulineNo.SK-13-34


16"thk;InsulineNo.

.793"Igx0.250"diam;

d;RadEngLabdwg No.

13/16"diamx9/16"h,with

9760-10;RadEngLab

inum;olivedrabfinish;

g LabdwgNo.SK-13-3.

m;1-1/6"diamx9/16"h,

eNo.9760-14;RadEng

nerator).

c;5.0-mmf±2%;zero

xdimen0562"Igx OJ250"

c:10-mmf±10%;zero

xdimen0.562"Igx0550"


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

c;100-mmf±10%:neg

°C;500vdcw;maxdimen

C25UJ101K.

c;1,200-mmf±20%;temp

°C;300vdcw;0.625"Ig

BK1200;RadEHKLab

ytic;8-mf;200vdcw;

gueNo.D11220DEAA-

C-5018-S7.

20-mmf±10%;500vdcw;

32"wd x7/32"thk;

,000-mmf±20%;500

gx15/32"wdx 7/32"

10,000-mmf±20%;300

Aerovoxtype338;Rad

1.

10000-mmf+60%

en53/64"Igx53/64"wd


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

.8-mmfto31-mmf:

dy1-7/16"IK x15/16"wd

3/64"diam;Sicklespart

.8-mmfto35-mmf;

dy1-7/16"lg x15/16"

x13/64"diam;Sickles

3.2-mmfto42-mmf;air

y1%"lg x15/16"wdx

/64"diam;.Sicklespart

3.5-mmfto47-mmf;

ody1-7/16"lg x15/16"

x13/64"diam;Sickles

35-mmfto47-mmf;

ody1%" lgx15/16"wd

3/64"diam;SicklesNo.

mic;1.5-mmfto7-mmf;

54/64"lgx 41/64"wdx

O;RadEngLabpart

-sect,each5-mmfto

platesper sect;body1%"

,shaft7/32"lKx 13/64"

-430304-2;RadEngLab

connectiontoleftside).

mic;7-mmfto45-mmf;

4"wdx %"thk;Erie

gLabpartC-5011-E5.

-winding;airwound;un-

8"diamwire;%"lg x%"


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8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

ennacoupling;single-

shielded;1%"turns0.0508"

%"lgx 5/16"hx5/16"

3-84.

lgridandplate;single

rns;0.0508"diamwire;

6"hx %"ID;RadEng

ttripler;single-winding;

6E copperwire;1%"lgx

2-160.

ondtripler;single-wind-

;4%turns;Wlg x%"

bdwgNo.13-87.

blerplate;airwound;un-

RadEngLabdwgNo

ound;unshielded;4turns

"lgx%"ID; RadEng

act:SocketSO-239;single-

q;AmphenolNo.SO-239;

5.

act:3-cont;straight;

phenolAN-3102-14S-7P;

act:3GRbananajacks;

k;RadEngLabdwg No

t:3GRbananaplugs;

RadEngLabdwg No

t:8-pincont;straight

dEngLab dwgNo

t;steel,lusterlessfinish;

16"thk;CorbinNo

No.SK13-35.

t;steel,lusterlessfinish;

16"thk;CorbinNo

No.SK13-35.

uminum:1%"lgx1"wd

gNo.BP-168. P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


T-53/TRC-7.

on

d;025"diam plug;2"lg

npartNo.1X1853;Rad

ngleckt).

d;025"diam plug;2"lg

partNo.1X1852;Ra_

5;(twockts, oneopen,

d;0.210"diamplug;2" lg

npartNo.1X41864;Rad

phone).

blackwrinklefinish;for

2Allen setscrews;%"

nding%"ononeside;

2-211;RadEngLab dwg

0-1ma;flushmtgcase

N1ModelABB4;Rad

-sect;oneSPDT,other

onenormallyclosed;

wd;AlliedConttypeTK;

000-A2.

tion;22-ohm±10%;%-w;

49"diam;RC20BF220K.

tion;39-ohm±5%;%-w;


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

ion;82,000-ohm±10%;

gx0.249"diam;RC20BF-

ion;220,000-ohm-i-10%-

x0.170"diam;RC10BF-

ion;330,000-ohm±10%;

x0.170"diam;RC10BF-

ion;390,000-ohm+10%$

x0.170"diam;RC10BF-

ion;470,000-ohm±10%;

x0.170"diam;RC10BF-

ion;470,000-ohm±10%;

x0549"diam;RC20BF-

ion;1-meg±10%;%-w;

70"diam;RC10BF105K.

ion;2.2-meg±10%;%-w;

70"diam;RC10BF225K.

ion;3.3-meg.±10%;H-w;

70diam;RC10BF335K.

ion;3.9-meg±10%;%-w;

70"diam;RC10BF395K.

ond;2.7-ohm±5%;%-w;

peBW1/2;RadEng

ond;5.6-ohm±5%;%-w;

peBW1/2;RadEng

ond;6.8-ohm±5%;%-w;

o.BW1/2;RadEng


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

bcottonwebbing;20%"k

abNo. BP-170.

position;single-sect;metal

aft *4"diamx5/32"Ig;

EngLabpartNo.8-

SPDT;isolantitecon-

o.28599-HC-l;Rad

W1;(waximpregnated;

e).

SPDT;single-sect;iso-

gx1%"wdx %"thk;

EngLabNo.S-5001-02-

cont8&9normalmake).


gx1%"wdx %"thk;

EngLabpartNo.8-


gx1%"diamx %"thk:

EngLabNo.S-5002-02

SPDT;single-sect;iso

gx1%"diamx %"thk,

EngLabNo.S-5002-02-


gx1%"diamx %"thk;

EngLabNo.S-5002^02-


gx1%"diamx %"thk;

EngLabpartNo.8-


gx1%"diamx %"thk;

EngLabS-5002-02-TW5.


gx1%"wdx %"thk;

EngLab5001-02-RW4;


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


-53/TRC-7.

on

lation;pri13,200-ohm;

e;turnsratioofpritosec

mx2%"h;RadEng part

t;pri12,000-ohm;sec

gx1-7/16"wdx 1-1/16"

5000-U2.

;input;shielded;

klesNo.Z-5000-S5.

;2dinterstage;shielded;

klesNo.Z-5001-S5.

;3dinterstage;shielded;

klesNo.Z-5002-S5.

;output;shielded;

klesNo.Z-5003-S5.

5

110/TRC-7.

10/TRC-7:sectional-

ngand3 groundelements.

12/TRC-7:3radiating

5/32"phosphorbronze


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


110/TRC-7.

on

-7:lightwtmetaltub-

x1&"ODx 0.065"thk:

ecNo.271-3103.

-7:aluminum;olive

mx0.065"thk;Sig C

-7:lightwtmetaltub-

"thk;Sig CdwgSC-D-

3.

-7:chromemolybde-

246"diam;taperedto

862.

olivedrabfinish;antenna

"hx 3/16"thk;SigC

um;olivedrabfinish;

gSC-D-16845.

num;olivedrabfinish;

gSC-D-16845.

mplate;6Mi"lgx2%"

wgSC-D-1064;(condNo.

m;olivedrabfinish;18%"

C-D-16853.

uminumalloy;12"lgx

-D-16854.

bber;outsidecircumfer-

"thk;GatesRubNo.

263432;(generator

screwterm;textoliteboard;

%"h,over-all;GEpart

watertightclosureforcrank-

1-7/32"lg;GE partdwg

carbon,hvside;%"x

pigtailandspring;GE

D-2.

carbon,lvside;5/16"x

pigtailandspring;GE

C-2. P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


on

,000-mmf;400-v;%"lg

MotiveMfgCotype

263431.

ytic;50-mf+75%

2%"lg; Solartype

63430Pt 1.

ytic;1,000-mf-4-75%

3V lg;SolartypeDFM;

8Pt 2.

ytic;1,000-mf-(-75%

x3V4"lg; Solartype

63429Pt 1.

ding;50-mh,60-c,aswith

ghit;0.49ohms dcresist-

%"h;GEpart dwgNo.

bly).

inding;unshielded;45

e;5/16"ODx%"lg over-

ELSK-12-160,GEpart

act:3roundpolarized

29/32"lg lesscont;

2-16S-5S;GEpartdwg

zincchromateandolive

wdx%"thk;Warwick

350& No.56173;GEpart

rubbersealandthumb

steel,bonderized,olive

"lgx9/32"wd x31/64"

"wd;AmerCabtHdwe

No.K-2263452.

er;3capacitorsand

numpanel;055 ampat

145vdc; 5"lgx3te" wd

dwgNo.T-2266903;

voltageregulator).

ringplate;%"ODx%"

wgNo.K-2263467;(gear

ODx%"IDx 9/16"thk,

partdwgNo.US-83350>


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


on

nionsandtestolitegears,

,barriercoat;speedchang-

over-all,with5Mj"Ig

ckness;crankingshaftfor

rtdwg No.P-2266809.

7-vdc,2-wire,Ivside,

losedframe;4V6"Igx 3"

t;0.1562"diamx11/16"Ig

K-2268400.

ncespecAXS-637;(gear-

d;syntheticrubber;1M>"

GEpart dwgNo.K-

rCapacitorC-703).

ndrical;textolite;%"

o.K-2223423;(No.4-40

steel,cadmiumplate;0.156"

,0.0948"thk;GEpart dwg

epulley).

bookpaper;

S-4178218.

miumpI;No.12-24;

dwgNo. K-!

amx1/16"thk;GE part

case).

10-32;11/64"thk;%"

69TM02;(gearcasemount-

mx

wgNo.7260;GEpart

um

sium;1230"x%"thkover-


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


on

xingpulleyto shaft-

GEpart dwgNo.K-

minum;anodized;No.

minum;anodized;No.

luminum;anodized;No.

.

luminum;anodized;No.

steel,cadmiumpI;No.

d;head%"acrossflats,

-2263445;(hingebolt

el,zincpI;No.6-32x

K-2268418;(specialhead

slotted);(capacitormount-

xsockettype,selflocking;

0;5/16"lgover-all;GE

forgroovedpulley).

dedbakeliteorsteatite;

initeNo.115015-2,

STM;GEpartdwgNo.

atormounting).

Dmusicwire;8turnsclose

ofwireatends ofspring;

wickpartdwgNo.US-

263480.

rbronze;%"ODx\Wlg

with0.7-lbpull;GE part

onforidlerpulleyassem-

miumpI;0.159"IDx9/32"

wgNo.K-2263499;(idler

miumpI;0.187"IDx11/32"

wgNo.K-2263484-1;

"ODx0.257"IDx0.062"


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8/21/2019 TM 11-617 1945 AN.TRC-7


itaryInformation.

S

gnal SupplyCatalogue.

F SignalSupplyCatalogue.

pIssue.

endableSupplies.

endableSuppliesforSchools,Train-

s.

eParts.

eParts.

yData.

gSpares.

SONAUXILIARYEQUIPMENTAND

.I-56-D,I-56-H,and

brationofElectrical

erI-166.

.

177.

ING,ANDLUBRICATING.

ongingtheLifeof


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8/21/2019 TM 11-617 1945 AN.TRC-7


ONS.

4A..Army-NavyGeneralSpecificationfor

rOver-

on.

molitions.

cPrinciples.

PUBLICATIONS.

forTraining.

ms,Film Strips,

ds.

ChemicalAttacks.

Manual,Army

atingSignals.

cation.

adioJamming.

tenanceofPower

nceofGroundSignal

oundSignal Equip-

anceofGroundSig-

nceofGroundSig-


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


ntenancePracticesfor

mentals.

nicationEquipment

nication

gramsforMaintenance

cations

AntennaSystems.

ator.

entals.

a.

RadioNoises.

ndLaboratoryExer-

atedRadio

tion.

nceManual.

d

ontrol

y

M11-455.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


RC-7,rightside.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


KC-7,chassistop.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


RC-7,chassisbottom.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


C-7,chassisrightside.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


RC-7,chassisleftside.


/ h t t p : / / w w w . h


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/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


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8/21/2019 TM 11-617 1945 AN.TRC-7


STORS

STORS

TIPI

onresistorswithaxial

atural tanbackground

compositionresistorswith

bya blackbackground

nsulatedresislorsmay

Theusualcoloris natural

orofuninsulatedresistors

her blackorwhite.The

sulatedresistorswith

r itmaybethe colorof

fthe resistancevalue.


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8/21/2019 TM 11-617 1945 AN.TRC-7


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


I-6)

TSAND

LY.

ug.


/ h t t p : / / w w w . h


8/21/2019 TM 11-617 1945 AN.TRC-7


HMSAT 25°C

°C

OHMSAT25°C

T?5°C

MSAT?SC

STMENT

ESSARY

OVERANDSHELL

TTOGIVE RATED

°C

C

MS

ITOR

RC-7,wiringdiagram.


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EMAININ

NFORMA-

FFICIAL

ATION.21JULY1945

,publishedonOrderNo.29016-Phila-45-08,

2February1945.Theserialnumbersofthe

supplementare:

3144incl

mentandhavingcustodyofthistechnical

otationsbesideeachaffectedpara-

chnicalmanualtoindicatethepresence

ormation.

esinnomenclaturethroughoutthemanual:

:AN/TRC-7A.

ead:RT-53A/TRC-7.

read:AS-110A/TRC-7.

hange"0.5to1.5 watts"toread:0.4to

thefollowingnoteunderthe captionsof

shouldbeincludedinthis illustrationappears

6.1afterfigure6.


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orusewithHeadsetHS-30-().

nd28, change"ControlUnitRM-52anc

3"toread:ControlUnitRM-53anc

2.

ne,delete"1 TubePullerTL-310/U"and

altherefor:

stlineof subparagrapha,change"plugPI'

ragraphc,undercomponentslistedinBag1,

0/U"andinsert:

bparagraphaand substitutethefollowing

ol(fig.37).ThePOWERVOLUME

receiverfilamentswitchS11,andcontrolsthe

hvariableresistorR17.This knobhasnoeffect

re36 andsubstitutenewfigure36located

ure41 andsubstitutenewfigure41located

ragrapha(3),delete"UseTubePuller

ubstitutethefollowingtherefor:

or tubepullerNo.1-125(pars.68 and68.1).


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ragraph68and substitutethefollowing

16.

usedforremovingthe miniaturetypetubes

tterunit.Pushtheroundwovenendofthe

AKE CARENOTTOSTRIKETHESEAL-

R.Pullstraightupon handleofpuller.

de toside.

-125.

usedforremovingthe largertubes(lock-in

ansmitterunit.Pushtheroundwovenendof

ube.Pullstraightupon handleofpuller.Do

etoside.


0sectionoftheblockdiagram,change

4.


xttolastline ofsubparagraphb,chanj

trol)"toread:(automatic-volume




stlineon page75,change"C22"toread:C2

ure54 andsubstitutenewfigure54locate

followingmaterialattheendofthe firstsen-

itorC103.


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ure55' andsubstitutenewfigure55located


ragraphb,change"Thesecondaryis

0-ohmheadset."toread:

forusewith eithera250-ohmheadsetora

bparagraphcandsubstitute thefollowing

therthe 250-ohmorthe4,000-ohmsec-

sconnectedtothe headsetthroughPHONES

oftheset.A smallreversiblenameplateor

marked250OHMSonone sideand400C

meplateindicateswhichsecondaryiscon-

ssarytochangetheconnectiontothetap on

merT5,thenameplateshouldbe-reversec

contactinthejackopensthefilamentcircuits

rwhentheheadsetplugis removed.

ragrapha,changethesecondsentenceto

of theharmonicusedasthelocalfrequency

omingsignalto producetheintermediatefre-

ragraphb,changethelastsentencetoread:

edby capacitorC48.

ragraphb,changethelastsentencetoread

edby capacitorsC51andC102.

ure59 andsubstitutenewfigure59locatet

ure60 andsubstitutenewfigure60locatec


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ofsubparagraphb,change"CapacitorC58

or",toread:

upplybypasscapacitor.

referencesymbolL7tothevariable

pline,change"L6"toread:L7.

ragrapha,changethelastsentencetoread:

edtogroundbycapacitorC42.

TO7.5VOLTBIASBUS"toread:


stsentenceofsubparagrapha,deleteth'

ure66 andsubstitutenewfigure66locatec

3sectionoftheblockdiagram,change

4.

bparagrapha(2) andsubstitutethefol-

-16,for miniaturetubes.

followingtosubparagrapha:

-125,for lock-intypetubes.

stsentenceofsubparagrapha(5),chanp

gure68 andsubstitutenewfigure68locate

gure69 andsubstitutenewfigure69located


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thedimensionin thelowerleft-handcorn

ngetheover-alldimensionfrom11.65(

paragraph115and substitutethefollo-v

TRANSMITTERPOWER

pacitorsC84andC85areadjustedatt

oattentionin thefield.However,iftubeV]

e neutralization.Whentheneutralization

er-amplifierstagewillgointo oscillation.Tl

edifthebrightnessof phantomAnteni

angeascapacitorC61(orC62)isadjuste

ralizationisoutof adjustment,thefollowii

d.

re.

nga crystalcorrespondingtoafn

.Followthemethodoutlinedin paragraph11

justmentofcapacitorC79(orC80)describe

emovetheplatesupplyvoltageof tubeVl

nbetweenterminal4oftransformerT8ar

teasilydoneby unsolderingthegreenles

at terminalclip5onswitchwaferB.S

00me. Setthemeterswitchtoposition

urrentof thefinalamplifier.

torsC84andC85at halfmaximui

f tubeV15byadjustingcapacitorC7

erdeflection.

sonanceoftubeV15plate circuitb

rC82).Themeterdeflectiondipswhenpassin

ance.Observetheamountofdipproduce*

82)to100me.

ceofcapacitorsC84andC85,eachbv

einsulatedbladeof AlignmentToolTL-314/t

4)above.Ifthemeterdip hasdecrease(

apacitanceofcapacitorsC84andC85insmal

repeatingsteps1(3)and(4). Ifthemeterdi


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

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hecapacitanceofcapacitorsC84andC85in

htimerepeatingsteps(3)and(4).

onisindicatedbyaveryslight dipwhen

ghresonancebymeansof capacitorC81

pplyvoltageremovedinstep(1) above.

gofthetransmitterbyfollowingthe pro-

116.

thirdlineofsubparagraphb(1)(c) change

nd80.

lastlineofsubparagraphb(2)(a) change

nd80.


aptionforfigure 75andsubstitutethefol-

smitterRT-63A/TRC-7,chasmtop.

"PI"toread: J6.


smitterRT-53A/TRC-7,chassisbottom.



smitterRT-53A/TRC-7,chassisobliquerightsideview.


gure80 andsubstitutenewfigure80locatec


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

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gure86 andsubstitutenewfigure86loca



G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

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C-71

O8

C-7A,frontpanel.


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

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smitterRT-53A/TRC-7,frontpanel,

ols.


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

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-1S5and tube-pullerNo.11-16.

IER

CAPACITOR

E CAPACITOR

plifier.


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

8/21/2019 TM 11-617 1945 AN.TRC-7


-

93-s


G o o g l e - d

i g i t i z e d

/ h t t p : / / w w w . h


_ u s e # p d - g

o o g l e

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ACITOR

d»-/amplifier.

ACITOR

mplifier.


G o o g l e - d

i g i t i z e d

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_ u s e # p d - g

o o g l e

8/21/2019 TM 11-617 1945 AN.TRC-7


detectorandfirstaudio amplifier

DCAPACITOR

da-jamplifier.


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ACITOR.

E CAPACITOR.

nicamplifier.

APACITOR

APACITOR


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APACITOR

weramplifier.

9,VIO.

ONE

ersupplycircuits.


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smitterRT-53A/TRC-7,leftside.


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smitterRT-63A/TRC-7,chassisrightside.


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TM 11-617 1945 AN.TRC-7

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