Radio Set SCR-503-B (Direction Finding)
Publisher: U.S. G.P.O.
Published: 1944
Place of publication: Washington, D.C., USA
Language: eng
Description: TM 11-246B Radio Set SCR-503-B (Direction Finding), 1944-03-04
Table of contents: title: TABLE OF CONTENTS; title: Paragraph Page; title: SECTION I. Description; title: 1. General  1; title: 2. Radio Set SCR-503-B, components with weights and dimensions 4; title: 3. Purpose  5; title: 4. Frequency coverage  5; title: 5. Weight  5; title: 6. Power source  5; title: 7. Power input  5; title: 8. Power output  5; title: 9. Description of main component parts   6; title: II. Installation and operation; title: 10. Initial procedure 15; title: 11. Installation 15; title: 12. Preparation for operation 21; title: 13. Identification of controls 25; title: 14. Operating instructions and precautions 29; title: III. Functioning of parts; title: 15. Loop theory 36; title: 16. Receiver theory 40; title: IV. Maintenance; title: 17. Servicing 42; title: 18. Trouble location and remedy chart 42; title: 19. Localizing the trouble 45; title: 20. Cleaning of contacts 53; title: 21. Battery replacement 53; title: 22. Fuse replacement 53; title: 23. Dynamotor brush replacement 55; title: 24. Dynamotor lubrication   57; title: 25. Pilot light replacement 58; title: 26. Tube replacement 58; title: 27. Removal and assembly of parts 58; title: 28. Alignment 59; title: V. Supplementary data; title: 29. RMA color code for resistors and capacitors. 75; title: 30. Table of replaceable parts 82; title: 31. List of manufacturers 228; title: LIST OF ILLUSTRATIONS; title: Fig. No. Title.; title: 1. Radio Receiver BC-973-B of Radio Set SCR-503-B, ready for use 1; title: 2. Radio Set SCR-503-B, main components !; title: 3. Radio Set SCR-503-B, components: a, b, c, d, h, i, j, and k; title: 4. Radio Set SCR-503-B, components : e, f, and g; title: 5. Radio Set SCR-503-B, components: 1, m, o, p, q, and r; title: 6. Radio Set SCR-503-B, components: n, s, t, u, and v; title: 7. Chests CH-103-B, CH-139-C, and CH-113-B, open; title: 8. Receiver, loop, tripod, and antenna assembled. Compass and tripod assembled; title: 9. Cord connections; title: 10. Control Unit RM-35-B, mounted; title: 11. Compass setting to orient on magnetic North; title: 12. Compass setting to orient on true North with a magnet declination of 3 degrees West; title: 13. Radio Receiver BC-1003-B, controls; title: 14. Control Unit RM-35-B, controls; title: 15. Single loop circuit; title: 16. Single loop antenna pattern; title: 17. Double loop antenna pattern; title: 18. Phase relationship when sights are pointing toward station; title: 19. Dual vacuum tube voltmeter in circuit; title: 20. Phase relationship when sights are 90° or 270° off the station; title: 21. Addition of i-f channels and oscillator to circuit; title: 22. Addition of detectors, audio stage and headphones to circuit; title: 23. Complete block diagram of either receiver of Radio Set SCR-503-B; title: 24. Chasis of Radio Receiver BC-973-B, bottom view; title: 25. Chassis of Radio Receiver BC-1003-B, bottom view; title: 26. Radio Receiver BC-973-B, tube socket voltage diagram; title: 27. Radio Receiver BC-1003-B, tube socket voltage diagram; title: 28. Radio Receiver BC-973-B, tube socket resistance diagram; title: 29. Radio Receiver BC-1003-B, tube socket resistance diagram; title: 30. Battery cable, fuses, and pilot light; title: 31. Loop communtator; title: 32. Dynamotor Unit PE-133-B and brushes; title: 33. Radio Receiver BC-973-B, i-f trimmer location; title: 34. Radio Receiver BC-973-B, oscillator and loop trimmer location; title: 35. Signal generator and loop; title: Radio Receiver BC-1003-B, B and C series, and i-f trimmer location 65; title: Radio Receiver BC-1003-B, oscillator and loop trimmerlocation 68; title: Power Cord CD-673-B, wiring diagram 71; title: Radio Receiver BC-1003-B, oscillator and band switch assembly, front view 72; title: Radio Receiver BC-1003-B, oscillator and band switch assembly, rear view 73; title: Radio Receiver BC-1003-B, volume and balance control, and band switch 74; title: Chassis of Radio Receiver BC-973-B, top view showing location of parts 78; title: Chassis of Radio Receiver BC-1003-B, top view showing location of parts 79; title: Chassis of Radio Receiver BC-973-B, bottom view showing location of parts 80; title: Chassis of Radio Receiver BC-1003-B, bottom view showing location of parts 81; title: Mounting Plate FT-363-B, bottom view 230; title: Radio Receiver BC-973-B, bottom view showing shock mounts 231; title: Control Unit RM-35-B, bottom view showing wiring 232; title: Dynamotor Unit PE-133-B, bottom view showing wiring 233; title: Dynamotor Unit PE-133-B, schematic diagram 234; title: Control Unit RM-35-B, schematic diagram 235; title: Radio Receiver BC-973-B, schematic diagram 239; title: Radio Receiver BC-1003-B, schematic diagram 240