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1、-*-; T.O.31R2-4-10l-2 HANDBOOK SERVICE INSTRUCTIONS RADIORECEIVER MODELSP-600-JX-21 (HAMMARLUND) PUBLISHEDUNDERAUTHORITYOFTHESECRETARYOFTHEAIRFORCE :.-_-.,.*- AF,Nunn. NAS,Alameda.Calif.;NAS.Jacksonville.Fla.;NAS.Norfolk.Va.;NAS.SanDiego.Calif.;NAS.Seattle.Wash.; ASD.NSC.Guam. Forlistingofavailablem
2、aterialanddetailsofdistributionseeNavalAeronauticsPublicationsIndexNavAerOOSOO. USAF Section T.O. 31R2-4-101-2 TABLEOF CONTENTS TableofContents Page INTRODUCTION1 IDESCRIPTIONANDLEADINGPARTICULARS1 1-1. 1-4. 1-10. 1-20. 1-33. General. PurposeandLimitations Leading Particulars . Condensed FactualData
3、. OperatingandAdjustmentControls 1 1 2 4 7 IITESTEQUIPMENTANDSPECIALTOOLS. 2-1.TestEquipment. 2-3.SpecialTools. 2-5.Cable Fabrication. 9 9 9 9 IIIPREPARATIONFORUSEANDRESHIPMENT.11 3-1.PreparationforUse .11 3-7.PreparationforReshipmentorStorage.11 IVTHEORYOFOPERATION13 4-1.GeneralSystemOperation13 4-
4、4.Receiving System BlockDiagram13 4-8.Receiver FunctionalOperation13 4-22.Simplified CircuitTheory.18 VORGANIZATIONALMAINTENANCE33 5-1.General33 5-3.Receiver Performance Tests33 5-6.TroubleAnalysis.33 5-11.MinorRepairandReplacement39 5-16.RemovalandReplacementofSubassemblies39 5-19.AlignmentandAdjus
5、tment.42 5-23.Preventive Maintenance43 VIFIELDMAINTENANCE45 6-1.Trottble Analysis.45 6-7.RemovalandReplacement52 6-14.ReceiverAlignmentandAdjustment54 6-17.Receiver Performance Tests.54 6-19.Preventive Maintenance54 6-22.OverhaulSchedule60 VIIDIAGRAMS61 7-1.General.61 7-3.IndexofDiagrams61 7-5.Tube-
6、socketTerminalVoltageDiagram.61 7-7.Tube-so a. z w .) Z z 10 . W IL.- f- .L f- 15 : Cl. f- : 20 0 25 40100 T.O. 31R2-4-101-2 SOLID CURVE:A-FAMPLIFIER RESPONSE DASHED CURVE: OVERALL RESPONSE (SEETEXT) 1000 CYCLESPERSECOND Figure1-5.AudioandOverallFidelityCurves Section I Paragraphs1-32to1-44 - 10,000
7、 1-32.TEMPERATUREANDHUMIDITY.There- ceiver willperformsatisfactorilyinambienttempera- turesrangingfromOC(32F)to60C(140F)ata relative humidityashighas 95 percent. 1-33.OPERATING AND ADJUSTMENT CONTROLS. 1-34.Thereceiveroperatingandadjustmentcontrols are locatedonthefrontpanel(figure1-2)andonthe reara
8、pron(figure1-3),respectively.Thecontrols are referred to below bytheirfront-panelandrear-apron designations. 1-35.SEND/REC.TheSEND/RECswitch (21, fig- ure1-2)is used to switch the receiverfromitsREC (receive) condition to a disabledSENDconditionin the presenceofastronglocal carrier.Whenswitched back
9、 toREC,thereceiver is ready forinstantuse. 1-36.MOD/CW.TheMOD/CWswitch (13, fig- ure1-2)is used tocontrolthebeat frequency oscillator andthe a-v-c time-constant network.IntheCWposi- tionthebfo isturnedon,andalongtimeconstantis usedforthe ave.Thisposition is usedforsuppressed- carrierandkeyed-carrier
10、reception,andalsofor frequency-shift receptionwhenthereceiver audiooutput isrequiredfora frequency-shift converter,orthe audio outputis desiredforaural monitoring.TheMOD position is usedform-c-w reception.Inthis position thebfo isturnedoff and ashorttime constant is used forthe avc. 1-37.BANDCHANGE.
11、TheBANDCHANGE control(17, figure1-2)is used to select the desired frequency band. 1-38.TUNING.TheTUNINGcontrol(15, fig- ure1-2)is usedtotuneinthe signal. 1-39.TUNINGLOCK.TheTUNINGLOCK(14, figure1-2)isused to lock thetuningmechanismat thetuningsetting chosen. 1-40.SELECTIVITY.TheSELECTIVITYswitch (18
12、, figure1-2)provides a choiceofXTAL(crystal) andthreeNON-XTAL(noncrystal)positionsofre- ceiver selectivity.Thesix positionsprovideselectivity stepsrangingfromaSHARPto aBROADindica- tion.TheXTALswitch positionsprovidebandwidths of0.2, 0.5,and1.3 kc,andtheNON-XTALswitch positionsprovidebandwidthsof3.0
13、, 8.0,and13.0 ke. 1-41.XTALPHASING.TheXTALPHASING control(1, figure1-2)is used toattenuateheterodyne interference closely adjacent tothedesired signal.It provides thisfunctiononlywhentheSELECTIVITY switch(18)isinoneofits threeXTALpositions. 1-42.BEATOSc.TheBEATOSc.control(10, figure1-2)is usedtovary
14、 the frequencyofthebfo, as requiredforkeyed-carrierandfrequency-shift operation. Thepitchofthetoneortones isdependentontheset- tingofthe control.Thecontrolmay be setonscalein either directionfromits0position.Itprovides aplus andminus three-kc tone range.Forsuppressed-carrier m-c-w reception,thecontr
15、ol,whensettoits0posi- tion, providestheb-f-ooutputasthe455-kc reinserted carrier. 1-43.RFGAIN.TheRFGAINcontrol(12, fig- ure1-2)is usedtoswitch the receiveronwhenturned clockwisefromitsOFFposition to apointwherea click is heard. Clockwiserotationofthecontrolincreases ther-fandi-fgainofthe receiver.To
16、preventoverload- ingthereceiver r-fandi-f sectionsinmanualoperation, thecontrolisturneddownsomewhatfromthemaximum position.Thecontrolis alsoturneddown,whenonavc, to reducethesensitivityofthe receiverduringperiods whenthe signal is offandfading, sothattheundesirable noiseoutputmay be reduced. 1-44.AV
17、C/MAN.TheAVCjMANswitch(11, figure1-2)is used to switchfromautomatic tomanual controlofthe receiver r-fandi-f gain.TheRFGAIN control(12)is operativeinbothpositionsoftheAVC/ MANswitch. 7 T.O.31R2-4-101-2Section I Paragraphs1-45to1-52 1-45.METER.Thespring-returnMETERswitch (3, figure1-2)is associatedwi
18、ththetuningmeter(2). InitsnormalRFposition,theswitch provides a cali- bratedr-f meter indicationiftheRFGAINcontrol (12)is fully clockwise.Whentheswitch isheldinits depressedAFposition,itprovidesa calibrated a-f meterindication. Toavoidmeterdamage,settheAUDIO GAINcontrol(16, figure1-2)fully coun- ter
19、clockwise,thendepressthemeterswitch, andthenslowly increasetheaudioleveltothe desired meter scale indication. 1-46.AUDIOGAIN.TheAUDIOGAINcontrol (16, figure1-2)is usedtoadjustthereceiver audio outputto a comfortable level.Thereceiveraudiooutput is adequate to operate anyrecordingequipmentcare- fully
20、,butthereceiver controlsshouldbeadjustedto provideundistortedoutput. 1-47.LIMITER/OFF.TheLIMITER/OFFswitch (19, figure1-2)controls a noise-limiting circuit.Inthe LIMITERposition the limiter is operative,inthe OFFpositionitis not.Theswitchshouldbekeptin theOFFposition, unless pulse-type noise is inte
21、rfer- ingwithreception. 1-48.FREQCONTROL.TheFREQCONTROL switch(8,figure1-2)controlstheselectionofthe variable-frequency oscillatorforvariable-frequency op- eration,orthecrystal-controlled oscillatorforfixed- channeloperationonanyofsix preselected channels. IntheVFOposition,thecontinuously variable o
22、scil- latoris placedinoperation.InanyofthesixXTALS positions,thecrystal associatedwiththeswitch position is connectedtothecrystal-controlled oscillator,andthe crystal oscillator is placedinoperation. 1-49.D,.FREQ.TheD,.FREQcontrol(7,figure 1-2)is usedtotuneinthesignalwhenthefixed- frequency crystal-
23、controlled first heterodyne oscillator isbeingused.Thecontrolprovides aslightadjustment inthefrequencyoftheoscillator, necessitated bythe 0.005-percent frequency toleranceinherentineach crys- talused.Thepanelmarkingsdesignateanarbitraryfre- quency scaleforthecontrolsetting. Clockwiserotation produce
24、s a relatively lower oscillator frequency. 1-50.METERADRF.TheMETERADRFcon- trol(5,figure1-3)is used to calibrate the r-f scaleof thetuningmeter(2, figure1-2).Witha 10-microvolt inputsignalandtheRFGAINcontrol(12)fullyon theMETERADRFcontrolis setforanr-fmeter scalereadingof+20db. 1-51.METERADAF.TheMET
25、ERADAFcon- trol(7, figure1-3)is usedtocalibratethea-f scaleof thetuningmeter(2, figure1-2).Witha 600-ohm re- sistiveloadconnectedtotheAUDIOOUTPUTtermi- nals(8)and1.9 voltsorsix miIIiwattsofaudiooutput, theMETERADAFcontrolissettoprovidea zero- dba-fmeterscale reading. 1-52.BFOIN.TheBFOINcontrol(4, fi
26、gure 1-3)providesthemeansforadjustingthelevelofthe b-f-o injection voltageappliedfromthebuffer stageto thedetector stage. 8 T.O. 31R2-4-101-2 SECTIONII TESTEQUIPMENTANDSPECIAl TOOLS SectionII Paragraphs2-1to2-7 2-1.TESTEQUIPMENT. 2-2.Thetestequipmentrequiredfortesting, servicing, andaligningtheradio
27、receiver islistedintableV.No special testequipmentisrequired. Figure2-1.Special Pliers 2-3.SPECIAL TOOLS. 2-4.Thespecialtoolsprocuredforthemaintenance oftheradioreceiverarelistedintableVI. 2-5.CABLEFABRICATION. 2-6.ANTENNACABLE.Theantennacable isusedto connectthesignalgeneratortotheantennainputcon-
28、nectorofthereceiverfortestoralignmentpurposes.It comprisesthepartsshowninfigure2-2. 2-7.CATHODEFOLLOWERCABLE.Thecathode followercable isusedtoconnecttheoutputmetertothe i-foutputconnectorfortest purposes.Itcomprisesthe partsshowninfigure2-3. TABLEV.TESTEQUIPMENT REQUIRED FORMAINTENANCE ANType NameDe
29、signation ElectronicMultimeterME-74jU ElectronicMultimeterANjUSM-34 AudioOscillatorTS-382AjU RFSignalGeneratorSetANjURM-25 RFSignalGeneratorSetANjURM-26 SignalGeneratorTS-447jU . CathodeRay OscilloscopeOS-9jU TubeTesterANjUSM-31 Alternate ME-6AjU ME-25AjU Hewlett-Packard200AB Precision E-200-C Preci
30、sion E-200-C HickokModel188 DuMontModel208 TV-3AjU Use A-cvoltmeteranddbmeter (usefulto500kc) Generalpurposevtvmand ohmmeter Audioresponse tests Alignmentandtesting, lO-kc to50-mcA-Msignal gen- erator Alignmentandtesting, 3-mc toabove 54-mcA-Msignal generator Alignmentandtesting, sweep generatorcove
31、ring445kc and3955kc Usedwithsweepgenerator foralignmentpurposes Tubechecking TABLEVI.SPECIAL TOOLS REQUIRED FORMAINTENANCE Figure 2-1 Hammarlund PartNo. T8222 Name Pliers, special Application Removalandreplacementofflatspring forr-ftuners 9 SectionIIT.O. 31R2-4-101-2 PL-259RG-59/U100OHM a2F=9 LANTEN
32、NA INPUT CONNECTORTO SIGNALGENERAT Figure2-2.AntennaCable PL-259RG-59/U, (APPROX20IN. LONG) 0 . ,_13 LlFOUTPUT CONNECTOR 10 Figure2-3.Cathode-followerCable T.O.31R2-4-101-2 SECTIONIII PREPARATION FORUSEANDRESHIPMENT SectionIII Paragraphs3-1to3-9 3-1.PREPARATION FOR USE. 3-2.UNCASING. 3-3.Theradiorec
33、eiver is packedforshipmentatthe factory.Anouterwoodencase encloses acartonwhich containsthereceiverproperandabagcontainingthe receiver cableplugconnectors, whichareremovedfrom the receiverforshipment.Unpacktheequipmentasfol- lows: a.Cutthe steel straps, close to thewoodencase cover, andfoldthemback.
34、 b. Remove the cover. c.Removethecartoncontainingthe receiverandplug connectorsfromthe case. d. Remove thewaterprooftapefromthewaterproof coveringwrappedaroundthecarton;removethe water- proofpaperwrapperandopenthe carton. e. Removethewoodframefromthecarton;alsothe accordion-foldedcorrugatedinteriors
35、comprisingtwo side pieces, one front,oneback,andonetop.Remove thebagcontainingthe receiverplugconnectors. f. Remove the receiverandplaceitoutoftheway,in a convenient placenearits final location. g. Removethereceiverplugconnectorsfromtheouter cloth,innerpaperbag,andplastic bags. h.Putallpackingmateri
36、alinthewoodencaseand store. 3-4.SETTINGUPRECEIVER. 3-5.PRIMARYTAPUSED.Whenshipped,theradio receiverpowertransformerprimarytapis connectedto operatefroma 50- to 60-cycle, 117-volt a-c source.Ta- bleVIIshowsthea-c source voltageratingofeachpri- marytap, identified by the numerical .designationas- sign
37、editonthebottomofthepowertransformer. TABLEVII.POWERTRANSFORMER TAP VOLTAGE RATINGS CAUTION Choosethepowertransformerprimarytap whosevoltageratingisinclosestagreement withthe a-c source voltage. 3-6.PLUGCONNECTORASSEMBLIES. Eachplug connector assemblyremovedfromthe receiverforship- mentis listedinta
38、bleVIII.Asitis unpacked, connect eachplugtothereceiver. 3-7.PREPARATION FOR RESHIPMENT ORSTORAGE. 3-8.Whentheradioreceiver istobereshippedortobe storedsubsequenttouse, removethefrequencycontrol unitcrystals, asinstructedinparagraph5-15,andre- movetheplugconnector assemblies listedintableVIII. Fullym
39、eshtheeight-section,four-gangvariableairca- pacitorandthenpackthereceiver as describedinpara- graph3-9. 3-9.Topackthereceiver,proceedas follows: a.Openthefoldedreceivercartonandtapeall edges withthree-inchgummedkraftpapertape. b.Accordion-foldtheendsofacorrugatedcardboard bottomforthecarton,toact as
40、 aspring-boardbottom forthereceiver. Placeitinthecartonwiththeaccordion foldsdownward. c.Placethereceiverinthecartonandcover the re- ceiverpanelwithwrappingpaper. d.Putintothe carton,aroundthe receiver, accordion- foldedcorrugatedinteriors,comprisingtwoside pieces, onefront,oneback,andonetop,withthe
41、accordion folds againstthewallsofthe carton; alsoputinone woodframetoact as acartonspacer. TABLEVIII. PLUGCONNECTORASSEMBLIES REMOVED FROM RECEIVER FOR SHIPMENT TapNo.VoltageRating 295 3105 4117 5130 6190 7210 8234 9 260 Reference Symbol P2 P3 P4 GovernmentType Designation AntennaInputPlug UG-102/U
42、AntennaAdapter Connector UG-104/U PL-259 ConnectsTo Antennaadapter connectorP3 ANTinputjack (1,figure5-4) IFOUTPUT connector (6, figure1-3) 11 SectionIIIT.O.31R2-4-101-2 e.Putthereceiverplugconnectors listedintable VIIIintotheplastic bags, pressthebagstoexhaust as muchairas possible,andheat-seal. Pl
43、acetheplastic bags intothepaperandcloth bags,andplaceinthecartonat thesideofthereceiver. f.Completethetapingofthecarton,usingthethree- inchtape. 12 g.Wrapthecartoninwaterproofpaperandseal all foldswiththree-inchwaterprooftape. h.Putthewaterproof-wrappedcartonintothe woodencase. i.Nailthecoveronthewo
44、odencaseandputtwo steel strapsaroundthecase. j.StencilaUmarkingsontheendofthecaseand affix an address labelontheside. T.O.31R2-4-101-2 SECTIONIV THEORY OFOPERATION SectionIV Paragraphs4-1to4-11 4-1.GENERAL SYSTEMOPERATION. 4-2.Theradioreceiver is designedforuseinsingle-or multi-receivermilitaryinsta
45、llations.Whererequired,two ormorereceivers maybeusedina space-diversity ar- rangement.Inthis system, each receiver is connectedtoa separateantennaandtheantennasarrangedinproper spacerelationshiptoeachother.Thereceivers may be interconnectedtoprovideacommona-v-c systemand/or commonaudiooutput,as requ
46、ired. 4-3.Thereceiving systemprovidesforreceptionof A-M,COw,orfrequency-shift signals. Receiveroutput may beintheformofaudio signals, availableatthe PHONESjack (20, figure1-2)orattheAUDIO OUTPUTterminals (8, figure1-3);docsignals, avail- ableattheDIODEOUTPUTterminals(2);or455-kc signals, availableat
47、theIFOUTPUTconnector(6). 4-4.RECEIVING SYSTEM BLOCKDIAGRAM. 4-5.A typical space-diversity systemforthe reception offrequency-shift teletype signals isillustratedinblock forminfigure4-1.Space-diversity systems make use ofthefactthatsignalsinducedinantennasfivetoten wavelengthsapartfade separately. Ea
48、ch receiver has a separateantennaandthetwoantennasare suitably spacedinrelationtoeach other.Theoutputsignal,in this instance, issuppliedfromtheIFOUTPUTcon- nectorsofbothreceivers.Thea-v-c systemsofthetwo receivers areinterconnectedattheAVCterminals(3, figure1-3)on-therearapron. 4-6.Inspace-diversity
49、operation,thesignalsinduced inthetwoantennasvaryinintensity,dependingupon propagationcharacteristics.Inany event, the receiver withthestrongerinputsignal develops thelargera-v-c voltageandsuppliestheoutputsignaltothe frequency- shiftconverterequipment.Sincethetwoa-v-c systems are interconnected, thelargea-v-cvoltagedevelopedin thereceiverwiththestrongerinputsignal reducesthe gainoftheotherreceivertoreduce its noiseoutput. Whenconditionsreverse, the
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