Page 1: ...HE SAME PAGES OF PREVIOUS DATE Insert changed pages into basic publication Destroy superseded pages Air Force OC 15 Jul 65 500 Reprinr BASIC AND ALL CHANGES HAVE BEEN MERGED TO MAKE THIS A COMPLETE PU...
Page 2: ...by a vertical line in the outer margins of the page Page No Date of Latest Revision i 21 22 1 August 1 August 1 August 1956 1956 1956 The asterisk indicates pages revised added or deleted by the curre...
Page 3: ...n 6 7 7 7 7 7 10 13 Uncrating Inspection Replacement of Defective Parts Setting Up the Receiver 2 3 2 5 2 8 2 12 Installation 2 19 Testing II PREPARATION FOR USE 2 1 III OPERATION 3 1 3 3 3 22 3 25 3...
Page 4: ...Section ii T O 31R2 4 101 1 Figure J 1 Radio Receiver Model SP 600 JX 2 J...
Page 5: ...quency band of 170 cycles and the line may be used for several such tone signals as well as for phone signals 1 8 The radio receiver provides for continuously vari able reception within the frequency...
Page 6: ...that the receiver switches and controls be set properly for the mode of operation contemplated These controls are all located on the front panel of the 2 receiver with the exception of the METER AD R...
Page 7: ...UENCY OSCILLATOR 1 F H DETECTOR AMPLIFIERS AVC CRYSTAL FILTER i s f MIXER C 1f O J vr A MIXER l I R F l c AMPLI FI ERS r 1 A C SOURCE SIGNAL PATH FOR FREQUENCIES ABOVE 7 4MC SIGNAL PATH FOR FREQUENCIE...
Page 8: ...t the r f tuner subassemblies for a particular frequency band become part of the r f section of the re ceiver The antenna and two stage r f gain provided to the signal assures that the signal plus noi...
Page 9: ...ensitivity minimum signal input to develop its rated a f output is two microvolts for an A M signal and 0 75 microvolt for a cow signal or better The undistorted power output of the receiver at thresh...
Page 10: ...JX 21 1 1 1 1 Government Quantity Name Designation Section I Paragraphs 1 36 to 1 37 full advantage should be taken of the SELECTIVITY switch positions to reduce interfering noise The SE LECTIVITY swi...
Page 11: ...first be removed To remove the clamp press inward on the spring while lifting the clamp off the tube Remove the tube by drawing it out from its tube socket Replace the top hat clamp by seat ing it on...
Page 12: ...ector 9 Electron tube V 1 10 Electron tube V3 11 Electron tube V2 12 Knurled thumbscrew 13 Retainer spring assembly 14 Crystal sockets 15 Electron tube V5 16 Electron tube V13 17 Pilot lamp 18 Metal b...
Page 13: ...2 045 mc on bands 4 5 and 6 the crystal frequency can be calculated by adding 3955 kc to the signal fre quency and dividing the sum by three 2 11 To mount the crystal units in the crystal sockets proc...
Page 14: ...g purposes plug a headset into the PHONES jack 20 figure 3 1 Either a high impedance or a low impedance headset may be used however the high impedance 8000 ohm type is recommended 2 17 LOUDSPEAKER Con...
Page 15: ...O LOUDSPEA Figure 2 4 Receiver Interconnections for Phone Space diversity Receiving System JUMPER REMOVED jV DIODE OUT UT AVe 0 0 G AUDIO OUTPUT 0 a u 0 SP 600 JX 21 DIODE OUTPUT Ave r 0 0 G AUDIO OUT...
Page 16: ..._ _ _ _ _ _ _ 0 Figure 2 6 Receiver Interconnections for Frequency shift Space diversity Receiving System DIODE OUTPUT terminals designated to the like terminal of the second receiver Connect the loud...
Page 17: ...IO OUTPUT terminals of each receiver if an audio signal is to be applied to the associ ated terminal equipment or if a 45S kc signal is to be used connect the IF OUTPUT connector 6 figure 2 2 of each...
Page 18: ...UNING control drives the vernier dial 6 14 visible through the window at the right side of the front panel and the main tuning dial 4 to indicate the fre quency selected 3 9 TUNING LOCK The TUNING LOC...
Page 19: ...utput is secondary to continuity of service 3 16 XTAL PHASING The XTAL PHASING control 23 is part of the crystal filter referred to in paragraph 3 15 and functions only when the SE LECTIVITY switch 22...
Page 20: ...o the tuning meter 3 21 PHONES The PHONES jack 20 provides the means for connecting a headset to the audio output section of the receiver Either high impedance or low impedance head phones may be plug...
Page 21: ...tuning dial 4 and the verniel dial 6 Allow the receiver to warm up for a period of 15 minutes j Set the MOD CW switch 13 to the MOD position k Rotate the BAND CHANGE switch 17 until the frequency band...
Page 22: ...then readjust the TUNING control slightly to obtain a zero beat in the output of the receiver 18 h Return the MOD CW switch to the MOD position i Clamp the TUNING LOCK 14 by turning it clockwise j Rea...
Page 23: ...y around 1000 cps Reception may be better with the control turned in one direction than in the other In any case select the position which provides the most intelligible reception c Readjust the RF GA...
Page 24: ...22 to its NON XTAL 3 kc 8 kc or 13 kc position depending upon 20 the bandwidth required for the mode of operation con templated Channel separations in multichannel oper ation are usually 170 cps and t...
Page 25: ...r in steps b and d of paragraph 3 32 as applicable Do this periodically at IS minute intervals or at longer intervals depending upon the frequency Revised 1 August 1956 drift noted When noise impairs...
Page 26: ...rted to in an emergency 4 3 ANTENNA SYSTEM 4 4 For optimum results a properly designed bal anced doublet or straight wire antenna should be used In an emergency when the antenna system has been damage...
Page 27: ...may be resorted to in an emergency 4 3 ANTENNA SYSTEM 4 4 For optimum results a properly designed bal anced doublet or straight wire antenna should be used In an emergency when the antenna system has...
