Hammarlund_SP-600-JX_user_1950.pdf
GENERALPURPOSE COMMUNICATIONSRECEIVER MODELSP-600-JX INSTRUCTIONS Manufacturedby THEHAMMARLUNDMFG.CO.INC. 460West34thSt.New York1,New York, U.S.A. P,ifttedinU.S.A. FIG.l FRONTVIEWorRECEIVER SP-600-JXINCABIIHT r Titk TABLEOFCONTENTS Page TechnicalSummary., . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-+ IGeneral Description,.3 IICircuitDescription_. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 IVOperation and Description of Controls. III Installation. . 8 8 VMaintenance9 Table2-TubeSocket TerminalResistances. TableI-TubeSocket Voltages.,. VIAlignment. VIIConversionofTableMode! ReceiverforRackMounting,. l1 l6 lO II Table3-RFandHFOscillator Alignment Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Table4-Approx.Signal InputsatIFandAFStages.13 Table5-PartsList. ILLUSTRATIONS l7 ConnectionDiagram-FrequencyControlUnit.3L LocationofTubesandAdjustments.l-i- AudioandOverall FidelityCurves.14 Selectivity Curves.15 RearViewofReceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 TopViewofReceiver.21 TopViewofReceiver-Ca.pacitorShieldRemoved. . . . . . . . . . . . . . . . . . . . . . . . . . .22 BottomViewofReceiverSP6(X)JX.23 BottomViewofReceiver-TuningUnitShieldRemoved.2-i- Circuit DiagramofReceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 figure Figure1 Figurel Figure4 Figure5 Figurc 6 Figure7 Figure8 Figure9 Figure 10 Fie-ureIt Figure12 Figure13 Figure14 FrontViewof Receiver SP600JX,incabinet. Block Diagram. ConnectionDiagram-ReceiverChassis. ConnectionDiagram-TuningUnit. 2 7 17 29 3 .54to4.0me .5to1.35me 1.35to3.5me 3.5to7.0me 7.0to1.8me 14.80to29.7me 29.70to5.0me GENERALPURPOSECOMMUNICATIONSRECEIVER MODELSP-600-JX TECHNICAL SUMMARY Electrical Charaderistics Frequency Range-total 6 bands. Band 1. B.nd2. Band3. Band.oj. Band 5. Band 6. Maximum UndistortedOutput-approximate-2.5watts. OutputImpedance-600ohms-bOlla-needsplit windings. Phone jack-winding; delivers15milliwattstoan 8000 ohm resistiveload, whentheaudio outputtothe 600ohmpower loadisadjustedto500 milliwatts. Power Supply Requirements LineRating.9$,105, 117.130,190,210.234and260volt taps, 50-60 cycles. PowerConsumption.130 watts, 1.25 amps.at117 voltr-maximum. TubeComplement-total20 RF,IFandBFaAmplificrll_.7-6BA6 HF, 2nd Conversion andBFaOscillators.3-6C4 Crystal ControlledHFOscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6AC7 Mixers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 -6BE6 Detector,CBias Rectifier and Noise LimiterfTMeterRectifier.3-6ALS AFAmplifier andIFOutput.1-12AU7 PowerOutput.1-6V6GT Rectifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5RGY Voltage Regulator.1-oAz Mechanical Specifications RackModel-Dimensions;19inches wide,1Oinches high and16inchell deep fromnckmounting surface.Weight66Ibs_ TableModel-Dimensions;2Itiinches wide.12inches highand17;4inches deep.Weight871lbs. Performance Data -(approximate values-taken on a sample receiver) Sensitivityis2.3microvolts.orbetter, throughouttheentire frequencynnge,for a signaltonoise powerntio of10tol. Image rejection ratios arebetterthan 80 db throughout the frequency range. TheIFrejection ratioat600 kcis2700 to 1 TheAVCaction will maintain theoutputconstant within12db whentheinput is increased from 2to 200,000 microvolts. GENERALPURPOSECOMMUNICATIONSRECEIVER GENERAL DESCRIPTION TheSP-6Q(Xisil20 tube Radio Communications RcciWrwithselfcontainedpowusupply.TheX suffix inthismoddnumber :y hndinU$C.Thiscontrolalsoaligns the dial frequency indicator with the proper dial scale. Inaddition tothefrequency scalu, the main dial hasanarbitrary scale which in conjunction with the b;md spread dial provides continuous band spread scales over each frequencybandfor extremely accu- tate logging and tesetability. Thesingle tuning controlislarge andofspecial de- aigntopermit m;lximumtr.lV1!:lSeapeedillweU:uex- ceptional operatingease.Itcontrolsboththemain andbandspreaddials.Ananti-backlashgentnin provides extremely close calibration accuracyandcom pletely accurate resetability.A tuninglockprovides pll-itive locking a.ction without alfecting the frequency setting. Thetuning ratio from the tuning control tothe main dial is50to1and the n.tio from thebandsprud d1to the maindidis6to1. Aningeniously designed rotary turretisemployed to change bandsandtoplacethecoil assemblieso( theRFamplifier. Mixer and First HeterodyneQscil- 5 latorsta.gesdiucrlyadjacenttotheirrespecti.e.sec- tionsofthe four gang tuning capacitor andtheirre- spectivetuba.ThisassuIe5maximum sensitivityat high signal tonoise.ratio. Twostag.of tunedr.dinfrequency amplification arr:provided on .IIbands.Thecircuit (or single con- vemon, used on frequenciesupto7.4megacycles., in- cludes a mixer, heterodyne o.sciHator, four stagesof IFamplification, detector andAVetl:ctifier, noise limiter and meter rectifier. heat frequency oscillator, beat frequency buffer amplifier, IF output,AFampli- nerandoutputpowerstage.Thecircuitfordouble. conversion, employedforfrequencies above 7.4 mega- cycles, includes a second mixer and a second hetero- dyne crystal controlled OKilIator.Thepower supply system includesBpower rectifier,Cbias rectifierand a voltage rtgub.ror. Thefrequency controlWlitprovides(orbedchM!- nelcrytta.lcontrolledOpen.tK)flon any six frequencir:s chO!Cnwithinthe n.ngeofthereceiver.frontpanel controls permit thewectionofthe normal high stabil- itycontinuouslyvuiablenmingoreitherofthesix selenedfixedfrequencysignakForcrystalcontrolled bed.channelopentionitisonlynecesstryto.5rtthe dioaltothesigndfrequl:IlCY,5wilCbto the cry5Ulfn qumcydesired andtunewidtthe delta frequency con- trol.NoretWlingofthemJ.intuningisnr:cessary or desirable, when llwitching fromVFQtocrystal open.- tion forthesamesignalfrequency.Theaecrystalsare notaupplied withtherecaver,buraMuldbepur chasedonspecialorderfromHAMMARLUND MFG.CO.specifyingthesignalfrequency for which itistofunction. Thetwoscale tuning meter normally indicates the relative strengthoftherectived signal indbfrom1 microvolt. when operated onAveand with theRF Raincontrolatmaximum. 1 rear control is provided for adjustmentttheplus20dbscalemdingwithan RFsignalinputof10microl/Olu.Ondepressionofthe panelmeterSWItchthe lower scaleofthe meteeindi- catl1theaudiooutputpawnlevel indbfrom6mllli- wan.Arear controlisprovided(oeadjustment of the0dbreading. TheAvedrcuirisprovided with $Cpan.terime constants forONandMeWoperation.Thebeatfo: quency oscillatot employs ahighcapacity Colpittscir- cuit which gives a high order of frequency stability and minimizes oscillator harmonics.Thebeat fre- quencY oscillator voltageisintroduced intothetk- teetQr throukh a bulfcr ampliner which eliminates OKillator lock-in.Thisfeature makes it possible to tune $ignais sharply to:erobeat andmitsthein- c:hwonoftherearc:ontrolforadjuacingthebeatoacil- Iator injectiontosuit operating conditions.A froot panelcontrol nrielllthea.udiobeatfrequency from0 to plusorminwJ:Ke. Thenoiselimitercircuiteffectively limitstheintu- ference. from ignition systemsOfother.sourasofpulse typenoi.sc.Thelimiter switch permitsoptionalUKof thelimiter. Theantenminputcircuitisdesignedforusewith a balancedline.Theinputimpecance is nominally 100ohms_Thenceivermayalsobeoperatedwitha conventional singlewireantenna_ Theaudiooutputcircuitisdesigned for a600ohm lmdorline and is providedwitha four terminal split windiogforbclanced10.1I.Jopt:r,tioll.UnJill.torted poweroutputisapproximately2.Swatu.Thehead phone circuit.henreferredtoan 8000ohmloadpr0- videsaigndsattenuated approximatehtSdb below the600ohmpower output. AnRFgain control is providedforthemanual con- trolofsensitivityinthepresenceofstrong signals and operatesoneitherMANUALorAye. Thesendnceiveswitch desensiti:esthenceiver butleavelllthepowerontoprovide forinntrecep- tion between transmission periods.AreuKcepta.de providesfortheconnectionofanexternal rd;ay. Radiation is negligible and oomplics withrequire mttItsforshipboard operation and for muti-ccceivn: install.ttions. FrequmcydriftUteral.Sminute warlnupperiod, nngabetween.001percentand.01pc.rcentoffre- quency depending011fufrequencywed.Thisisa very unusualdegruoffrequency stabilityforwriilblc tunedHPo.sciUa.torsandclosdyapproachescrystal _;lily. Theselectivity control providesth.rdegreesof crysta(andthreedegrees()fnCJn-crystal selectivity ra.nging ftomshup(.2kc) to broad (13.:KC).The crystal.niter embodiesthesamecircuit featuresthat have proved10effectiveanddesira.bleinHammarlund SuperProReceivers, incorporatedinanimproved mechanical design. II CIRCUIT DESCRIPTION Gmoual-ThecircuttI.hewnKhelJliltic:aUyin FigureII.A bloc:kdiagram,Figure 2, isprovidedto moredearly!howthearra.nRCmcnt andfunction.of thevariou.acircuit sttt:iotu.Thelocationofthevui- ou.stubesisshowninFigureJ.Thecircuit,for,mle cmvcnion,uaedforfrequencietupto7.mc lCII1aiasoftwoatae:sofRFam.pJ.mcationV-IandV-2, First:MixerV-S, Fira:HctuodyneOaC:illatOIV-.four stagcaofIFamplification V-7.V9,V-tO ilnd V-11. DetectorandAveltttiiiuV-H,Noise LimiterV-IS. BeatF.requencyOsc:il.latolV-B.IFoutput;andAF amplifierV-l6-A;and V-I6-B.OutputPowel stage Y-17andthePowelSupplysystcm which includcs B PowerRectifittY-19,eBias Rectifier V-20andVolt- ageRegulatorV-IS. Inthecircuitfordouble conversion, used for signal frequencies above7.1-me.theSecondMixerV-6and SecondHeterodyneOscillatorV-8are substituted for theGatetubeV-7. InputCoupling -Theantenna. couplingisdesigned toprovideoptimum coupling from a 100ohmtnns- miaaion line. A balanced doubletorstraightwireIn- tennamaybeUICd. RFAmpIie.r-Aninou!Iydesignedrotary turretisemployedtochangebandsand to placethe cciI.apreviowlywuttaineddegree. p;.H.tyn.00ciIIa,-(C.,.aCantnll.J VoJ) -Poraervicellrequiring extremelystablc,fixed. frequency operation,acrystal.controlledhighfre- quency oscillatorisprovided.Instantchangeover from variabletotty5ta1contronedoscillator,with a choict; ofm:crystal.positionll, iseffaudbyafrantpandcoo- trol. A second front panel control permits ;adjustment ofthecrystal oscillator frequency over aplworminus .oojipercentrange. IntennediateFrequencyAmplifier-Single conver- sion toHSkcisemployed for signal frequenciesbe- low7.4mc.Therearefourstage.sofIfamplification incorporatinitheHammarlWldpatentedcry.5l:alfilter circuit. Six positionsofselectivity provide6dbband widthsof.2.,.,1.3,8and13kc:.Onthe.thnenu rowerbandwidthpositionll,thecrystal filter isinop- ention.Thecrystal phasing control provides extreme selectivity forthehighattenuationofdOKlyildjant intctferinCsignitls. Doubleconvusionis employedforsignal frequen- ciuabove7.me.Thesigna.!isheterodynedto.9jiS mebythePintMixerY-SandHeterodyneOscillatOr VorV-forhighimagettjcction.The3.955mc signalisthenheterodynedtoSSkc bytheSecond MiurV-6andtheJ.Smc Fixed Crystal Controlled Osc:ilbtor V-S, foe aelectivity. Dcucto.-andAve-1bcV-14tubeiswedas a high. levelDeta:tor;andAveReetifi.er.TheAVecir- cuitis providedwithseparate time constants forCW andMCWopention. BeatFn:i:JuencyOscillator-Thebeatffequency OlIciliatoremploysahighcapacityColpittscircuitwhich gives ahighorderoffrequency stabilityandminimizes rncillator harmonics.Thebeat frequency Oscillator Vl3.iscoupled intothedetector circuit through Buf- ferAmplinelV.12,whicheliminates05Cillatorlad-in and permits variation of the beat oscillator injectionby meansofa control located ontherearofthechsis. A front Panel control variestheaudio beat frequency, from .tero beat to plusorminus 3 kc. NoiseLimiter-Thenoise limiter circuit V15, limitsthenoise interference fromiRnitionsystemsor other sourcesofpulse type noise. A separate control Power Supply -Thepowerl,Iupplyisan intelitral partofthereceiver.ItincludestheB rectmer Y-19 andtheCrectifier Y-20,toetherwith their respective lowpassfilters andtheYoltage Regulator Y-18.The power transformer is provided withscrewterminal primarytaps,coveringapower line source range of 90to270volts, 50 to60cycles.Thepower trans- formerisprotectedbya fuse intheprimary circuit. TuningMeter-Thetuning meter is used onAye operation to indicatetheaccuracyoftuning and the relative strengthofreceived signals. Depressionofthe Meter Switch convertsthemeter circuit for indication of output level in db from6milliwatts. LEVELMETER IFOOTPUT M BUFFER . -oT . 12AU76V6GT 0 Vi6AVlA IFOUTLIMITER.Em< 12AU7GAL5 -. ;. FO irIllXER . !. , ,/ <.,. , ,m CRY5TA.l.CONTIIOUEO 7 FO 1 - . MIXER SBAS . ,. ,0 6OG7 SLOCK DIAGRAM 0 eRECT . B REeT 5R4GY FIG. 2 -Si9nalpafIl_toall-.,; _._ SignalpafIllorfrequMl:inaI.4me -/oW1.me: switch8-6,permits optional useofthe limiter on<LIly modeofoperation when pulse type interference is present. AudioFre<juency Amplifier -A resistance coupled amplifier triode Y-16-B, amplifiestheaudio frequency signal from the detector. AudioOutput-Theaudio output tube Y-17,is transformer coupled through a split, balanced windng todeliver 2.5 watts undi.storted outputtoa600ohm load.Thesplit balanced winding permits balancing of the direct curreht in the output circu
