Page 1: ...HANDBOOK OVERHAUL INSTRUCTIONS RADIO RECEIVER M O D E L SP 600 JX 21 HAMMARLUND PUBLISHED UNDER AUTHORITY OF THE SECRETARY OF THE AIR FORCE Air Force OC 29 J U I 65 250 eprint 15 JANUARY 1956...
Page 2: ...text affected by the current revision is indicated by a vertical line in the outer margins of the page The asterisk indicates pages revised added or deleted by the current revision ADDITIONAL COPIES...
Page 3: ...spection 12 6 1 0 Parts Inspection 13 6 3 1 Servlce Llrn ts 15 REPAIR AND REPLACEMENT 17 7 1 General 17 7 3 Switch Base and Spring Assembly 17 7 7 Selectivity Switch 17 7 9 Retrop cal zation 17 REASSE...
Page 4: ...Assembly 3 2 2 Special Tools to Reassemble Tuning Unit Shie d Assembly 3 2 3 Special Tools to Reassemble Turret Rotor Assembly 4 2 4 Special Tools to Reassemble Gear train Assembly 4 4 1 Gear train A...
Page 5: ...that all possible precautions are taken at the factory to hi publication comprises overhaul instructions provide each receiver for use in perfect condition need for Radio Receiver Model SP 600 JX 21...
Page 6: ...n the receiver is over 2 3 SPECIAL TOOLS hauled The manner of use and application of each tool 2 4 The special overhaul tools required to perform is outlined in detail in paragraphs 7 6 and 8 4 TEST I...
Page 7: ...Section I 1 T O 31R2 4101 3 Figure 2 3 Special Tools to Reassemble Turret Rotor Assembly Figure 2 4 Special Tools to Reassemble Gear train Assembly...
Page 8: ...utilizing a volt ohmmeter that it has no d c voltage across it possibly due to the failure of its associated isolating capacitor and then measure its resistance Turn the re ceiver off to measure the...
Page 9: ...will determine whether the capacitor is shorted 3 11 LEAKY CAPACITOR When a capacitor is sus pected of being leaky avoid having to unsolder one of the capacitor terminals from the receiver by utilizi...
Page 10: ...or i e the eight section four gang tuning capacitor d The gear train assembly e The 24 r f subassemblies i e the r f tuners 4 5 DISASSEMBLY 4 6 DISASSEMBLY OF GEAR TRAIN ASSEMBLY The gear train assemb...
Page 11: ...in assembly 12 Shaft and gear assembly 38 Switch spring 13 Fllnheel and shaft assembly 39 Lever assembly 14 Idler 40 Gear 1 5 Bearing screw 41 Gear 16 Nut 42 Screw I Ball bearing 43 Lockwasher 18 Bear...
Page 12: ...soldered to it d Both the large octal sockets which are removed with the electrical wire leads resistors and capacitors that are soldered to them 4 9 The r f strip i e the r f wiring assembly which is...
Page 13: ...ubricate in the remote instance when the need arises SECTION VI INSPECTION 6 1 GENERAL 6 2 The raido receiver is inspected by careful observa tion and feel for any possible abnormal physical indica ti...
Page 14: ...t for tightness When checking attaching hardware such as nuts and or screws consider the assembly tight when no more than a 90 degree turn may be taken up in the attaching part Make sure to reseal tho...
Page 15: ...loose Make sure that miniature tube pins are not loose or broken being careful not to bend the pins during removal or insertion of the miniature tube Check to see that the gliiss envelope is not chip...
Page 16: ...an i f output autotransformer 11 r f chokes and 15 r f transformers or coils the latter contained in the various transformer subassemblies comprising the receiver Four of the latter contained in the f...
Page 17: ...tion MIL C 3098 but have stamped on the top and one side the signal frequency in kc for which they are intended 6 27 TRANSFORMERS AND CHOKES The receiver audio output and power transformers and the t...
Page 18: ...assembly is indented from one band to the next A loose wavy washer indicates turret rotor endplay c Check to see that the U shaped contact spring at the rear of the turret rotor assembly provides fir...
Page 19: ...o properly locate the new isolantite base position the line up bar 2 over it and the other isolan tite bases contained in the r f strip The line up bar is then located in relation to the isolantite ba...
Page 20: ...te the hub 44 and screw 49 with lubricat ing grease Specification MIL G 3278 and secure the hub to the front end of the mounting disc and shaft assembly using three screws 45 and three lockwashers 46...
Page 21: ...flywheel and shaft assembly the cam line up the cam with the lever and roller assembly 7 arm and then tighten the setscrews in the cam and hub assembly 11 o Check for smooth overall operation then tig...
Page 22: ...e to terminal board El7 at the front of the chassis assembly alongside the selectivity switch and the other to terminal board El4 normal to the former at the front end of the switch h Retropicalize al...
Page 23: ...knob on the front panel is turned clockwise the r f tuners for band No 5 6 1 2 and 3 are re assembled in sequence 9 9 REASSEMBLY O F PLUG CONNECTOR ASSEMBLIES 9 10 Prior to reassembly of the radio rec...
Page 24: ...ern receiver used in an operational activity comprising other ment T O s or other instructions to indicate electronic equipment duplicates that of the receiver overhaul or the incorporation of changes...
