Radio Set SCR-614-A, Radio Receiver BC-969-A, Power Supply Unit RA-61-A
Publisher: U.S. G.P.O.
Published: 1943
Place of publication: Washington, D.C., USA
Language: eng
Description: TM 11-873 Radio Set SCR-614-A, Radio Receiver BC-969-A, Power Supply Unit RA-61-A, 1943-11-12
Table of contents: title: TABLE OF CONTENTS; title: Paragraph; title: SECTION I. DESCRIPTION; title: 1. General 1; title: 2. Main components, weights, and dimensions 1; title: 3. Radio Receiver BC-969-A 2; title: 4. Case CS-109-A 6; title: 5. Mounting FT-411-A 6; title: 6. Power Supply Unit RA-61-A 6; title: II. INSTALLATION AND OPERATION; title: 7. Unpacking 10; title: 8. Installation in vehicles  10; title: 9. Installation in fixed locations 11; title: 10. Installation in Radio Direction Finder Central TC-8 and Radio Intercept Central TC-9 11; title: 11. Preparation of Radio Set SCR-614-A for operation 11; title: 12. Operation 14; title: III. FUNCTIONING OF PARTS; title: 13. General circuit 17; title: 14. Antenna circuit 17; title: 15. Radio frequency amplifier 18; title: 16. High frequency oscillator 19; title: 17. Converter 20; title: 18. First i-f Stage 21; title: 19. Second i-f Stage 22; title: 20. Audio detector 22; title: 21. Noise limiter 23; title: 22. Audio frequency amplifier 23; title: 23. Automatic volume control 24; title: 24. Beat oscillator 25; title: 25. Auxiliary diode circuit 25; title: 26. Tuning indicator 26; title: 27. Voltage regulator 26; title: 28. Voltage supply 26; title: 29. Power Supply Unit RA-61-A 26; title: IV. MAINTENANCE; title: 30. Operational check in field 28; title: 31. Field upkeep 29; title: 32. Trouble location and remedy chart 34; title: 33. Alignment procedure 36; title: 34. Disassembly and reassembly of front panel dial assembly 40; title: 35. Replacement of crystal filter, switch and socket 42; title: 36. Replacement of fixed capacitors 43; title: 37. Replacement of band switch and limiter switch 43; title: 38. Replacement of transformers 45; title: 39. Replacement of the gang capacitor 46; title: 40. Replacement of tube sockets 47; title: 41. Servicing Power Supply Unit RA-61-A 47; title: 42. Performance characteristics 50; title: 43. Moisture proofing 51; title: V. SUPPLEMENTARY DATA; title: 44. Tabular list of replaceable parts 54; title: 45. Index of manufacturers 94; title: LIST OF ILLUSTRATIONS; title: Fig. No. Title Page; title: 1. Radio Set SCR-614-A VIII; title: 2. Radio Receiver BC-969-A, back view 3; title: 3. Radio Receiver BC-969-A in Case CS-109-A on Mounting FT-411-A, front view 5; title: 4. Power Supply Unit RA-61-A on Mounting FT-414, diagonal view 7; title: 5. Power Supply Unit RA-61-A on Mounting FT-414, back view 9; title: 6. Power Supply Unit RA-61-A, schematic circuit diagram 27; title: 7. Radio Receiver BC-969-A, tube sockets and transformers resistance diagram, bottom view of chassis 32; title: 8. Radio Receiver BC-969-A, tube socket voltage diagram, bottom view of chassis 33; title: 9. Radio Receiver BC-969-A, top view 37; title: 10. Power Supply Unit RA-61-A, interior view 48; title: 11. Power Supply Unit, RA-61-A, practical wiring diagram 49; title: 12. Radio Receiver BC-969-A, schematic circuit diagram 97; title: 13. Radio Receiver BC-969-A, simplified schematic circuit diagram 99; title: Auxiliary diode circuit; title: Automatic volume control circuit; title: 14. Radio Receiver BC-969-A, bottom plate removed, bottom view 101; title: 15. Radio Receiver BC-969-A, practical wiring diagram 103