Radio Receivers BC-312-(*), BC-312-(*) X, BC-342-(*), BC-314-(*) and BC-344-(*)
Publisher: U.S. G.P.O.
Published: 1944
Place of publication: Washington, D.C., USA
Language: eng
Description: TM 11-850 Radio Receivers BC-312-(*), BC-312-(*) X, BC-342-(*), BC-314-(*) and BC-344-(*) 1944-03-15
Table of contents: title: TABLE OF CONTENTS Paragraph Page; title: Section I. DESCRIPTION.; title: General 1 5; title: Differences in models 2 5; title: Construction 3 7; title: Mounting 4 7; title: Weight and dimensions 5 7; title: Frequency ranges 6 11; title: List of main components 7 13; title: II. INSTALLATION AND OPERATION.; title: Initial procedure 8 15; title: Installation 9 15; title: Preparation for use 10 16; title: Operation 11 17; title: Precautions during operation 32 24; title: Field maintenance 13 24; title: Accessory equipment 14 25; title: III. FUNCTIONING OF PARTS.; title: General circuit 15 28; title: Antenna circuit 16 32; title: Radio-frequency circuits 17 33; title: Radio-frequency oscillator 18 35; title: Crystal filter 19 36; title: Intermediate-frequency amplifier 20 38; title: Second detector and audio amplifier 21 40; title: Continuous-wave oscillator 22 41; title: Volume control 23 41; title: Dial lamp circuit 24 42; title: Heater circuits 25 49; title: Dynamotor DM-21-(*) 26 50; title: Dynamotor DM-21-CX 27 51; title: Rectifier RA-20 28 51; title: Paragraph Page; title: IV. MAINTENANCE.; title: Lubrication 29 54; title: Inspection 30 54; title: Tube socket voltage measurements 31 55; title: Procedure in case of failure 32 55; title: Locating trouble 33 61; title: Trouble shooting 34 62; title: Repairs 35 65; title: Chassis layout illustrations 36 66; title: Continuity test tables 37 66; title: Removal and assembly of parts 38 84; title: Alignment 39 85; title: V. SUPPLEMENTARY DATA.; title: Table of replaceable parts 40 97; title: LIST OF ILLUSTRATIONS; title: Fig. No. Title Page; title: 1. Radio Receiver BC-312-(*), front panel view 8; title: 2. Radio Receiver BC-342-(*), front panel view 9; title: 3. Radio Receiver BC-314-(*). Receiver BC-344-(*) is identical in physical appearance 10; title: 4. Radio Receiver BC-312-(*) removed from cabinet 12; title: 5. Outline dimensions of all models 14; title: 6. Functional circuit diagram of BC-312-(*), BC-312-(*)X, and BC-342-(*), MVC operation 29; title: 7. Functional circuit diagram of BC-314-(*) and BC-344-(*) 80; title: 8. Antenna circuit, all models 81; title: 9. Antenna noise-suppression circuit as used in BC-312, BC-312-A, BC-312-C, BC-342 and BC-342-C 82; title: 10. Circuit diagram, crystal filter circuit 37; title: 11. Functional diagram, second detector, manual and automatic volume control, all models 39; title: 12. Schematic diagram, Receiver BC-312-(*) 48; title: 13. Schematic diagram, Receiver BC-312-(*)X 44; title: 14. Schematic diagram, Receiver BC-314-(*) 45; title: 15. Schematic diagram, Receiver BC-342- (*) 46; title: 16. Schematic diagram, Receiver BC-344-(*) 47; title: 17. Tube heater circuits in BC-312-(*), BC-314-(*), BC-342-(*) and BC-344-(*) 48; title: 18. Oscillator compartment heaters in BC-312 and BC-342 48; title: 19. Tube heater circuits in BC-312-(*)X 49; title: 20. Dynamotor DM-21-(*) as used in BC-312-(*) and BC-314-(*) 60; title: 21. Dynamotor DM-21-(*), schematic diagram 51; title: 22. Rectifier RA-20, inside view, as used in BC-342-(*) and BC-344-(*) 52; title: 23. Rectifier RA-20, schematic diagram 62; title: 24. Tube socket voltage measurements for BC-312-(*) using adapter with Test Set 1-56- series 56; title: 25. Tube socket voltage measurements for BC-312- (*)X using adapter with Test Set 1-56- series 57; title: 26. Tube socket voltage measurements for BC-314-(*) using adapter with Test Set 1-56- series 68; title: 27. Tube socket voltage measurements for BC-342-(*) using adapter with Test Set 1-56- series 59; title: 28. Tube socket voltage measurements for BC-344-(*) using adapter with Test Set 1-56- series 60; title: 29. Chassis layout, high-frequency models, no crystal filters, top view 67; title: 30. Chassis layout, high-frequency models, with crystal filter, top view 68; title: 31. Chassis layout, medium-frequency models, top view 69; title: 32. Chassis layout, high-frequency models, bottom view 70; title: 33. Chassis layout, medium-frequency models, bottom view 71; title: 34. Chassis layout, high-frequency models, shields and power supply removed, rear view 72; title: 35. Chassis layout, medium-frequency models, shields and power supply removed, rear view 73; title: 36. Chassis layout, rear view, BC-312-(*), showing Dynamotor DM-21-B or DM-21-CX 74; title: 37. Chassis layout, rear view, BC-342-(*), showing Rectifier RA-20 75; title: 38. Location of terminals on volume control 81; title: 39. Location of terminals on OFF-MVC-AVC switch 81; title: 40. Set-up of receiver and test equipment for receiver alignment 86