Hallicrafters SX-140 Operating And Service Instructions Download Page 1 | Manualshive

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Summary of Contents for SX-140

Page 1: ...OPERATING AND SERVICE INSTRUCTIONS COMMUNICATIONS RECEIVER MODEL SX 140...

Page 2: ...hus defective This warranty does not extend to any of our radio products which have been subjected to misuse neglect accident incorrect wiring not our own improper installation or to use in violation...

Page 3: ...ied plugged into the cr ystal calibr a tor s ocket will permit the IF tr ansformer s to be aligned with the use of the Carrier Level meter as an output indicator Other special features include auxilia...

Page 4: ...650 KC 15650 16050 KC 15 21 0 21 5 MC 1650 KC 11325 11575 KC 10 28 0 29 9 MC 1650 KC 14825 15775 KC 6 50 0 54 0 MC 1650 KC 24175 26175 KC FCC BAND LIMITS 3 5 4 0 MC 7 0 7 3 MC 14 0 14 35 MC 21 0 21 45...

Page 5: ...Wire Antenna J extensive damage to the unit and costly repairs 3 4 ANTENNAS The RF input of the receiver is designed for operation from either a single wire antenna fig 2 a half wave doublet or other...

Page 6: ...1 GENERAL Each control of the receiver performs a definite function which contributes to its reception capabilities Full appreciation of the receiver is to be expected only after becoming familiar wi...

Page 7: ...0 40 M Q I II SIINITS DB OYER sa 7 0 7 il 7 2 7 3 10 M 14iO I I I 1 3 14 4 ANT TRIM CAL RESET 15 M 2 0 2 1 2F 21 3 2 4 2 5 0 0 10 M 210 2 5 29 2 5 29 9 RECEIVER 5 O 51 0 65 P 53 0 5 0 the hallicrafte...

Page 8: ...ITION Figure 6 Station Control Receiver Controlling Antenna Relay and Transmitter sx 140 RECEIVER CONTACTS OF FUNCTION SWITCH AN CW SSB AUXILIARY SWITCH G CONTACTS SWITCH CONTACTS SHOWN IN NORMAL OR R...

Page 9: ...The CAL RESET control is a variable capacitor connected in parallel with the MAIN TUNING capacitor to permit recalibration of the dial pointer on each band This may be considered as an electrical poi...

Page 10: ...vides a signal that will zero beat with the local oscillator to provide a calibra tion marker at the low frequency edge of the 80 40 20 15 and 10 meter bands and at 52 5 MC on the 6 meter band For cal...

Page 11: ...reached Either side of the zero beat point may be used for the reception of CW sig nals Signal pitch may be varied to a comfortable listening level by tuning nearer to or further from the zero beat 3...

Page 12: ...e cabinet When removing the chassis from the cabinet care should be taken not to damage any of the components 6 3 CARRIER LEVEL METER ADJUSTMENT To adjust the carrier level meter discon nect antenna a...

Page 13: ...METER ADJ LIS SOM RI7 SELECTIVITY V2 BFO S4 ANL OFF Vl S lO L l SOM SIF L3 20M L4 i5M L5 10M L6 6M L2 40M SlE L9 i5M LIO 20M LS 10M lI2 SO 40M L7 6M SIB L13 6M Ll4 10M Ll6 20M 1I5 15M R4 S3 SI JI S2 R...

Page 14: ...ctive and open or short the signal cir cuit Triode scillator section of V2 6U8A defective Antenna coils Lt L2 L3 L4 L5 and or L6 open or shorted RF coils L7 L8 L9 LtO and or Lt2 shorted or open Oscill...

Page 15: ...ontained in the above trouble shooting chart refer to service and operating questions paragraph 4 13 S METER AMP AND AUDIO OUTPUT VS 6AW8A AVC DET ANL AND FIRST AUDIO NOTES CONTROL FUNCTION BAND SELEC...

Page 16: ...PROCEDURE 1 Disconnect antenna and remove the chassis from the cabinet see para 6 2 2 Insert 1650 KC crystal in crystal socket see fig 8 3 Set controls as follows ANT TRIM Center of range CAL RESET Ce...

Page 17: ...ator 2 Output meter 3 0 02 mfd capacitor 4 A non metallic alignment tool for IF transformer slugs PROCEDURE 1 Disconnect the antenna and remove the chassis from the cabinet see para 6 2 2 Preset the c...

Page 18: ...in the speaker Rock slug slowly back and forth until maximum deflection is indi cated on the output meter and the speaker audio level is maximum 7 Adjust the oscillator coils for the re maining bands...

Page 19: ...BRATION PROCEDURE PARAGRAPH S 2Si 5MMF 2 ALIGNMENT PROCEDURE SECTION SIB 5 f b V J lF 7 CHASSIS GROUND REAR S W I MF p U Ll2 80 RB IK J C 39 SIA 159MMF Z 1 1f I I SIA I REAR 56 4 II 3 C41 f r C42 2 rc...

Page 20: ...Output mica unless otherwise specified LM1 2 Pilot Lamp 47 039 100019 C35 265 mrnf 500V 2 493 122650 334 Duramica TRANSFORMERS MISCELLANEOUS PARTS C37 175 mrnf 500V 2 493 121750 334 Duramica Tl Transf...

Page 21: ...094 902430F 968 Printed in U S A...

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