SCR-244D_user_K4AHZ_TM11-851_1953.pdf

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1、DEPARTMENTOFTHEARMYTECHNICALMANUAL -244-D AND RADIO RECEIVERS R-274A/FRR, R-274C/FRR R-320A/FRC, R-483/FRR AND R-483A/FRR DEPARTMENTOFTHEARMYOCTOBER1953 TECHNICALMANUALI No.11-851r TM11-8thechinshouldnt sag,sinceobstructionoftherespiratorypassages mayoccur. 3.Removeanyfrothordebrisfromthemouthwith y

2、ourfingers.Drawthevictimstongueforward. 4.Beginartificialrespiration.Continueitrhyth micallyandwithoutanyinterruptionuntilnatural breathingstartsorthevictimispronounceddead. Trytokeeptherhythmsmooth.Split-secondtiming isnotabsolutelyessential. 5.Whenthevictimstartsbreathing,orwhenaddi tionalhelpisav

3、ailableloosentheclothing;remove it,ifitswet;keepthevictimwarm.Shockshould receiveadequateattention.Dontinterruptthe rhythmicalartificialtechniqueforthesemeasures. Dothemonlywhenyouhavehelporwhennatural breathinghasstarted. 6.Whenthevictimisbreathing,adjustyourtiming toassisthim.Dontfighthiseffortsto

4、breathe.Syn- chronizeyoureffortswithhis.Afterresuscitation, keephimlyingdownuntilseenbyaphysicianor untilrecoveryseemscertain. 7.Dontwaitformechanicalresuscitation!Ifan approvedmodelisavailable,useit, but,sinceme chanicalresuscitatorsareonlyslightlymoreeffec- tivethanproperlyperformedpushpullmanual

5、technique,neverdelaymanualresuscitationforit. BACK-PRESSUREARMLIFTMETHOD 1.PositionOfVictim.Placethevictimintheprone Dropthearmsgentlytothegroundor floor.Thiscompletesthecycle. (See CandD). Now. repeatthecyc1e. 5.CycleTimingandRhythm.Repeatthecycle 10 to12timesperminute.Use asteadyuniformrate ofPres

6、s,Release,Lift,Release.Longercountsof aboutequallengthshouldbegiven tothePress andLiftstepsofthecompressionandexpansion phases.MaketheReleaseperiodsofminimum duration. 6.ChangingPositionorOperator. (a)Rememberthatyoucanuseeitherorboth kneesorcanshiftkneesduringtheprocedure, pro- videdyoudontbreakthe

7、rhythm.Observehowyou rockforwardwiththebackpressureandbackward withthearm-lift.Therockingmotionhelpstosus- taintherhythmand,addstotheeaseofoperation. (b)Ifyoutireandanotherpersonisavailable,. youcantaketurns.Becarefulnottobreakthe rhythminchanging.Move to one sideandletyour replacementcomeinfromtheo

8、therside.Yourre- placementbeginsthePressReleaseafteroneof theLiftReleasephases,asyoumoveaway. TMAR-3 , cr - II :l!; t- - . E . a - . .c use ashieldedcable leadwhosesheathisgrounded.Alsouse acommon ground.Further,usetheRFGAINcontrolsothatthe IFOUTPUTofeachreceiverisinitiallythesame. c.Alternatetothes

9、ystem describedinbabove, theaudiooutput,insteadofthei-foutput,from eachreceivermaybefed to a suitable dual- diversityconverter.Theavcinterconnection between receivers is maintained.Inthis instance, a common external bfo (beat-frequency oscillator) as well astheexternal h-f oscillator would provide f

10、orbestresults. d.Toprovide forthespace diversity reception of c-wandmcw transmissions, a system similar tothatoutlinedincabove, whereinthedual- diversity converter is replacedbya diversity demodulator (detector), provides for suitableout- putto operate an ink recorder.Inuse, avc withoutbfo provides

11、for mcw reception,andbfo withoutavc provides for c-w reception. e.To provide forthespace diversity reception of voice signals, common avc is used between receivers,buttheaudiooutputof only one re- ceiver is used.To removetheaudio from one receiver, disconnectthejumperontheterminal boarddesignatedDIO

12、DEOUTPUTontherear apronof this receiver,andconnectthenegative terminal to one oftheDIODEOUTPUTjumper terminals of theotherrecei,ver. Note.-WithregardtocwRadioReceivers,R-274A/ FRRandR-483/FRR,resistorR64(fig. 70) isunsoldered fromitsjunctionwit.h resistor R63 (fig. 67)andcapacitor C142(fig.70).Thiss

13、imulatesremovingtheDIODE OUTPUTjumper.Thediodeoutputnegativeterminal isthenthejunctionofR63and0142. f.To provide forthespace diversity reception of cw to a tone keyer ortaperecorder, usethe ,.- 1I TENNAS I lfJ RADIO H DYNAMIC RECEIVERKEYER R-320A/FRCKY-SO/FRe LOUDSPEAKER NO.1 LS-156/FRC lfJ RADIO RE

14、CEIVER RECEIVER -,-. MONITOR R-320A/FRC MX-986/FRC NO.2 LfJ RADIO -POWER RECEIVER R-320A/FRC SUPPLY NO.3 PP-479/FRC - AN PATCHINGPANEL SB-99/FRCTM851-3 Figule3.Radio Receive,.R-320A/FRC, typical system application, simplified btock diagmm. 275375-53-2 9 methoddescribedineabovebutremovetheavc interco

15、nnection; donotuse avc or bfo.Toobtain theoutput,connect to one ofthethreeintercon- nectedjumperterminals oftheDIODEOUT- PUT. 87.5pounds. 66pounds. 67.5 pounds. 600 ohms, resistive. 8,000 ohms, resistive. (Thiscircuitwill operatesatisfacto- rilywithheadsets rangingfrom600- to8,000-ohmim- pedance.) 7

16、0 ohms, resistive. 2watts. 95percent. 3.5-mccrystaloscil- lator(double con- version) . I-ffilter circuit. H-fcrystaloscillator (bands2through 5)(CrystalUnit CR-18/Unotsup- plied). 320F.to1400F. 455 kc (all models)_ 1.805mcto11.218333 me(RadioReceivers R-274A/FRHandR- 274C/FRRonly). Lead.in.-_- - - W

17、eight: RadioReceiverR- 274A/FRR. Table-cabinettype_ Rack-mountingtype. RadioReceiverR- 320A/FHC. RadioReceiverR-96 pounds. 483/FRRorR-483A/ FRR. RadioReceiverR-97.5 pounds. 274C/FRR. I-FOUTPUT-_ Maximumundistortedpower output. Antennas: Dipole-ConsistsofWireW- 152,twoInsulators IN-124,Rope RP-3,ands

18、ixIn- sulatorsIN-125. Straightwire (simple)ConsistsofWIre W-152. WireW-15L Permissibleambienttempera- ture. Relativehumidity-.-. Outputmatchingload impedances: 600OHMSbalanced_ PHONES._ B+fuse_ Crystals: 3,500 kc (all models)_ Seleetivity: Crystal,6dbdown2-kc, .5-kc,and1.3- kcbandwidths. Noncrystal,

19、6dbdown3-ko, S-ko,and13-kc bandwidths. Fuses: Linefuse1.6-ampereor3- ampere. %-ampere. 3,955kc;then455 kc. A-m. Al-cw. A2-cw. A3-Voice. FI-FSKKeying. 50to60 cps. 20each. 90-to270-volt ac. 25to60 eps. 130watts. Mcw, 2f-LVorbetter; cw, .75f-LVorbet- tel;asignal-plus- noisetonoise power ratioof 10to1at

20、 a 3-kcbandwidth. 19each. Superheterodyne, sinp.;leanddouble conversion. 455 kc. .54meto1.35mo. 1.35mcto3.45 me. 3.45mcto7.4 me. 7.4meto14.8 me. 14.8meto29.7me. 29.7meto54 me. 1.3.5meto29.7me. Frequencyrange: BandL_ Band2_ Band3_ Band4. Band5_._._ Band6_ Crystalcontrolled(Radio ReceiversR-274A/ FRRa

21、ndR-274C/ F R Ronly)(bands 2through5). Receivertype_ I-f(bands1, 2,and3)(single conversion). I-f(bands4,5,and6) (double conversion). Typesof signalsthatcanbe received. Numberoftubes: RadioReceiversR-320A/ FRC,R-483/FRR, andR-483A/FRR. RadioReceiversR-274AI FRRandR-274CI FRR. A-csupplyrequirements: S

22、ourcerating_ RadioReceiversR- 483/FRHandR- 483A/FRR. RadioReceiversR- 274A/FRH,R- 274C/FHR,and R-320A/FPC. Powerconsumption_ Sensitivity_._ 5.Technical Characteristics 10 6.Packaging Data a. When encased for shipment,RadioSetSOR- 244-DandRadio ReceiversR-320AjFRO,R- 274AjFRR,andR-2740jFRReach includ

23、esrun- ning spares (par. 15) contained inaninner wooden box.InRadioSetSOR-244-D,theinner wooden box also containstheminor components listedin paragraph14.Moisture-vaporproofcontainers are usedtoinclose eachofthe receiver components and thecartoned itemsintheinner wooden box. Anexploded viewofthetypi

24、cal export packing used is showninfigure12for RadioSetSOR- 244-D.Thedimensions, volume,andweight of each case used for each equipment are included in thefollowingchart. INum-lHeiahtWidthDepthVolume Unit Equipment berorl.,) weight caS3S: (in.)(in.)(euft) (lb) RadioSetSCR- 244-)_ 118).(,3525).(,9.3317

25、5 RadioReceiverR- 320A/FRC_ 11834238.15155-170 RadioReceiverR- 274A/FRRor R-274C/FRR rackmounting_11834238.15155-220 RadioReceiverR- 274A/FRRtable cabinet_ 118).(,3525).(,9.33170-240 No/.e.-Itemsmaybepackagedinamannerdifferent fromthatshown,dependingonthesupplychannel.Where aweightrangeisshown,thedi

26、fference isduetotheextra excelsiorandlargercasesusedtopacksomeofthereceivers. b.Thefollowing list indicatesthecontents of each case. case forexactcontents. Seethepackaging listattachedto each Case dimensions (iu.)IContentsIr otes -.- lSY,X35X25X-1-RadioReceiverR-483/FRRorR- 483A/FRRG. 1-Setofrunning

27、sparesconsisting of 12 electrontubes,2 diallamps,and12 fuses. Comprisescabinetreceiverwithtubes,and indicatorlamps,allpackedin aseparate cartonedassembly. Operatingcomponentsandrunningspares areallcartonedandpackedin aseparate woodenbox. 1-HeadsetCord,NavyTypeNo.3W- 4!J534. 2-InsulatorsIN-124_ 6-Ins

28、ulatorsIN-125._ 1-150-ftlengthofWireW-151(onreelL_ 1-150-ftlengthofWireW-152._ 1-Headset,NavyType10. 49507_ 2-TechnicalManualsTM11-85L_ 18 x 34 x 23_ _1-RadioReceiverR-320AjFRC,R-274Aj(RadioReceiverR-274AjFRRonly.) FRC,orR-274C/FRR. 1-Setofrunningsparesconsisting of 2 diallamps,12 fuses,and13electro

29、n tubesinRadioReceiversR-274AjFRR andR-27-1CjFRRbutonly12electron tubesinRadioReceiverR-320AjFRC. 2-TechnicalmanualsT1111-85L._ Tablecabinetorrackmountingsforall types.Tubesandindicatorlampsare included,andareallpackedin aseparate cartonedassembly. Runningsparesareallcartonedandpacked inaseparatewoo

30、denbox. 11 7.TableofComponentsforRadio SetSCR-244-D .a.ThevariouscomponentscomprisingRadioSetSCR-244-Daretabulatedbelowandare illustrated m figure2. Component RequiredNo.HeightDepthLeugthVolumctnit _(in.)(in.)(iu.)(eu It)Icight (lb) -,-,- Total_ WireW-152_ InsulatorIN-124,_ InsulatorIN-125_ RopeRP-3

31、_ WireW-151(011reel)_ RadioRecei velR-483/FRRorR-483A/FRR Headset,NavytypeNo.49507_ Headset,CordNavytypeNo.3W-49534- TechnicalManualT1111-851 150ft1,800 2_%G G_%4 150ft1,800 150ft1,800 L_12%1721% L_ L _ _ _G6 2_1118! .0263.3G .002.2 .OOG1.2 .076.G9 .0674.2 2.8102. 5 .04.G3 .OOG.28 .1082 3.1:3l115.OG

32、 Nolc.-Thislistforp; 12AU7 6V6GT eee T8 D e FO C4 BIASRECT 6ALS 9 B+RECT SR4GY T70 VIC) 6ALS e SNOISELIMRECT-STRA=IN=IN=S=U=LASTOR.1N:;-2_5,SjPACER=IN:S:UL:A:TORIN:JII-2il4STRQA=IN=1N=S=U=LATOR,IN.-:275-1 ANTENNAWIREANTENNAWIREROPE W-152W-152RP-3 HEADSETCORD NAVYTYPENo. 3W49534 RAOIORECEIVER R-483/F

33、RR ORR-483A/FRR PHONES PLUG Pl55 TORECEIVER ANTENNA INPUTRECEPTACLE JI THROUGH PLUGS P2 ANDP3. PI A-CPOWERCORD TM851-14 Figure15.Radio SetSCR-244-D,cording diagmm. b.ConnecttheHeadset,NavytypeNo. 49507 byitsPlugPL-54toJackJK-26attheotherend ofHeadsetCord,NavyTypeNo. 3W-49534. Caution:Connecta 600-oh

34、m,5-wattresistor acrosstheAUDIOOUTPUTterminalswhen these connections arenotused. c.Connectthedoubletantennasystem(par. 23) to Radio ReceiverR-483/FRRorR-483A/FRR byconnectingthereceiverantennasysteminput plug P2 (par. 23) tothereceiverantennaadapter connectorPlugP3(TypeRadioFrequencyAdap- terUG-;-10

35、4/U)andinturnconnectedtoANT inputreceptacleJl(RadioFrequencyReceptacle UG-I03/U). d.TurntheRFGAINcontrol fully counter- clockwise toitsOFFpositionandinsertplugPI intothea-c power source. 26.Service upon Receipt of Usedor Reconditioned Equipment a.Followtheinstructionsfor unclating,un- packing,andche

36、ckingtheequipment(par. 22). b.Checktheused or reconditionedequipment fortagsorotherindicationspertainingto changes inthewiring of the equipment.Ifanychanges inwiringhavebeen made,notethechangeinthis manual,preferablyontheapplicable schematic diagram. c.Checktheoperatingcontrols for theirproper funct

37、ioning.Iflubricationis indicated, refer to thelubricationinstructionsinparagraphs43 through45. d.Performtheinstallationandconnection pro- cedures given inparagraphs23, 24,and25, as applicable. 31 SectionII.CONTROLSANDINSTRUMENTS 27.General Haphazardoperationorimpropersettingofthe controlscancausedam

38、ageto electronicequipment. Forthis reason,itisimportanttoknowthefunc- tionofeverycontrol. 28.RadioReceiver(AllTypes)Controls (figs. 16, 17,and18) Thefollowingtableliststhecontrols ofthe radio receiver, all types: Control RFGAINcontrol (R93). $END-RECswitch (89). MOD-CWswitch(87)_ AVC-MANswitches (88

39、). I.,IMITER-OF F switch(86). 32 Function InOFFposition,disconnectsre- ceiverfroma-cpowersource. InONpositionincreasesthe rfandi-fgainofthereceiver whenadvancedin a clockwise direction. InSENDposition,disablesthe receiverbutleavesa-cpower onforinstantreceptionin RECposition. InMODposition,providesfo

40、r voiceormcwreceptionand,in CWposition,forc-wreception. InCWposition,switcheson thebfoandswitchesinan additionalcapacitortotheavc circuitrysothatavcmaybe effectiveforthereceptionof high-speedc-w signals. InAVCposition,providesfor delayedavcofther-fandi-f stagesofthereceiverfora chosensettingoftheRF

41、GAINcontrol(R93).Also, themeter(MI)isswitchedin toprovidefor adb-levelindica- tionofther-fsignalstrength inrelationtoImicrovolt.In MANpositionprovidesforthe manualcontrolofthereceiver r-fandi-f gain asdetermined bythesettingoftheRFGAIN control.InRadioReceiver R-320A/FRC,thei-fgainis furtherdetermine

42、dbytheset- tingoftheIFGAINcontrol (R211). InLIMITERposition,switches inacapacitortothenoise limiterrectifiercircuitryto provideforeliminatingnoise, ifany,fromtheaudiooutputof thereceiver.InOFFposition thenoiselimiterisinoperative. Control AUDIOGAINcontrol (R84). IFGAINcontrol (R211)(InRadio Receiver

43、R-320A/ FRConly). METE RRF-AF spring-returnswitch (811). BANDCHANGE switch(SIA,8IB, SlC,8ID). TUNINGcontrol(CIA throughH). SELECTIVITY switch(S5A,S5B, S5C). Function J Apotentiometerwhichincreases theinputtotheaudioampli- fierofthereceiver,whenad- vancedina clockwisedirection. Usedtovarythei-fgainof

44、the receiveltoanylevelbelow thatdeterminedbythesetting oftheRFGAINcontrol (R93). InnormalRFposition,meterMl providesa db-levelindication ofther-fsignalstrengthinre- lationtoImicrovolt,whenthe AVC-MANswitch88isat AVC.Intheheld-depressed AFposition,meterMIpro- videsa db-levelindicationof theaudiooutpu

45、tofthere- ceivel inrelationtothestand- ardreference leveloutputof6 milliwattsacross 600ohms. Aturretsystemcomprisinga6- position,4-sectionbaseand pinrotorandspringstator assembly;eachpositionpro- videsforindentingoneofthe6 frequencybandsofthere- c.eiver.Therangeofthefre- quencybandindentedisthat ind

46、icatedonthedialvisible throughtheMEGACYCLES window. Controlsthesettingof avariable- air,8-section,4-gangtuning capacitorusedtoresonatethe desiredsignalfrequency.A TUNINGLOCKisprovided whichclampsthevernierdial ofthetuninggear-trainmecha- nism,andtherepreventsthe maindialandtuningcapacitor fromshifti

47、ngaftersetting, eventhoughtheTUNING controlknobremainsfreeto turn. The6-position,3-waferswitch whichprovidesa choiceasto .2-kc, .5-kc, 1.3-kcXTAI.,and 3-kc,8-kc,andl3-kcNON- XTAI.,positionsofreceiver se- lectivity;thereceiverattenua- tionis6-dbdownattheseband- widthsfromthatatthemid- bandvalues. Con

48、trol XTALPHASING control(CllI). BEATOSC.control (L45). VFO-XTALS1,2,3, 4,5,6,switch(S2 andS3)(InRadio ReceiversR-274A( FRRandR-274C( FRRonly). LlFREQHIGH-LOW control(C65)(In RadioReceiversR- 274A(FRRandR- 274CfFRRonly). PHONESjack(J3)_ PI-IONOinlet(E1)(In RadioReceiversR- 483fFRR,R-274A( FRR,andR-32

49、0A( FRConly). DIODEOUTPUT- AVCterminalboard E3(InRadioRe- ceiversR-274C( FRR,R-320A(FRC, andR-483A(FRR only). ;?5375-53-3 Function Thetwo-sectionstator,single- section,rotorvariable-airca- pacitorwhichisrotatedin eitherdirectiontohighlyat- tenuateheterodyneinterfer- ence closelyadjacenttothe desired signal.Thisco