Radio Sets SCR-608-A and SCR-628-A
Publisher: U.S. G.P.O.
Published: 1944
Place of publication: Washington, D.C., USA
Language: eng
Description: TM 11-620 Radio Sets SCR-608-A and SCR-628-A, 1944-01-01
Table of contents: title: TABLE OF CONTENTS; title: SECTION I.; title: Description; title: Paragraph 1. Purpose 1; title: 2. Performance Characteristics 1; title: 3. General Features 1; title: 4. Associated Items 7; title: 5. Frequency Modulation 9; title: 6. Mounting FT-237-(*) 11; title: 7. Radio Receiver BC-683-A 11; title: 8. Radio Transmitter BC-684-A 12; title: 9. Remote Control Unit RM-29-D 25; title: 10. Dynamotors DM-34-(*), DM-35-(*), DM-36-(*), DM-37-(*) 25; title: 11. Cabinet CH-74-A 27; title: 12. Mountings FT-284-(*) and FT-285-(*) and Frame FM-43 27; title: 13. Mast Bases 27; title: 14. Mast Base Bracket MP-52 * 27; title: 15. Mast Sections 27; title: 16.  Cords and Cordage 27; title: II. Installation and Operation.; title: 17. Initial Procedure 29; title: 18. Installation 29; title: 19. Preparation for Use 30; title: 20. Operation 32; title: 21. Presetting Push Buttons 36; title: 22. System Operation 41; title: III. Functioning of Parts.; title: 23. Functioning of Radio Receiver BC-68 3-A 43; title: 24. Functioning of Radio Transmitter BC-684-A 57; title: 23. Functioning of Remote Control Unit RM-29-D 63; title: 26. Functioning of Dynamotors DM-34-(*), DM-35-(*), DM-36-(*), DM-37-(*) 63; title: 27. Functioning of Control Circuits 63; title: IV. Maintenance.; title: 28. General Maintenance Information 71; title: 29. Routine Check of Mounting 73; title: 30. Routine Check of Radio Receiver BC-683-A 73; title: 31. Routine Check of Radio Transmitter BC-684-A 77; title: 32. Routine Check of System 84; title: 33. Emergency Check of Receiver Output Volume and Circuit Alignment 84; title: 34. Emergency Alignment of Radio Receiver BC-683-A 86; title: 33. Emergency Alignment of Radio Transmitter BC-684-A 95; title: 36. Emergency Sources of Test Tones 100; title: 37. Precision Alignment of Radio Receiver BC-683-A 100; title: 38. Precision Alignment of Radio Transmitter BC-684-A 105; title: 39. Location of Trouble in Radio Receiver BC-683-A 109; title: 40. Location of Trouble in Radio Transmitter BC-684-A 124; title: 41. Maintenance of Dynamotors 130; title: V. Supplementary Data.; title: 42. Replacement of Parts 133; title: 43. Modifications During Manufacture 139; title: 44. Color Codes on Components 149; title: 43. Table of Replaceable Parts 156; title: LIST OF ILLUSTRATIONS; title: grouped according to components; title: Fig. Title Page; title: General:; title: 1 Radio Set SCR-608-A: Front View of Cabinet CH-74-A with Associated Components   VIII; title: 2 Radio Set SCR-628-A: Front View of Cabinet CH-74-A with Associated Components   2; title: 3 Radio Set SCR-608-A: Over-all and Unit Dimensions 8; title: 23 Radio Set SCR-608-A: System Block Diagram  41; title: 69 Radio Set SCR-608-A: System Schematic Diagram 189; title: Radio Receiver BC-683-A:; title: 6 Front View 12; title: 7 Oblique Rear View 13; title: 8 Left-hand Interior View 14; title: 9 Right-hand Interior View 15; title: 10 Push-button Assembly, Right-side View 16; title: 1 1 Push-button Assembly, Front View 16; title: 24 Block Diagram 43; title: 25 Functional Diagram of R-f Amplifier, Modulator, and R-f Oscillator 44; title: 26 Functional Diagram of I-f Amplifier and Limiter 46; title: 27a Functional Diagram of Discriminator 48; title: 27b, c, d Vector Diagrams Showing Phase Relations in the Discriminator 49; title: 28 Functional Diagram of A-f Amplifier 51; title: 29 Functional Diagram of Delayed-automatic-volume-control Circuit 52; title: 30 Functional Diagram of Squelch Circuit 54; title: 31 Functional Diagram of I-f Oscillator 56; title: 32 Functional Diagram of the Heater Circuits 57; title: 43 Wiring Diagram of Front Panel 72; title: 44 Apparatus Location Diagram, Front View of Panel 73; title: 45 Apparatus Location Diagram, Left-side View 74; title: 46 Apparatus Location Diagram, Right-side View 75; title: 51 Location of Alignment and Tuning Controls 93; title: 57 Voltage Diagram 117; title: 58 Resistance Diagram 119; title: 70 Schematic Diagram Showing Modifications During Manufacture 191; title: 71 Schematic Diagram 193; title: 72 Wiring Diagram Without Front Panel 195; title: Radio Transmitter BC-684-A:; title: 12 Front View With Crystal Compartment Open 17; title: 13 Assembly and Exploded View of Crystals 18; title: 14 Right-hand End View with Cover Plate Removed 19; title: 15 Interior View with Top Cover and Dynamotor Removed 20; title: 16 Push-button Assembly, Left-side View 21; title: 17 Push-button Assembly, Right-side View 21; title: 18 Interior View with Bottom Cover Removed 22; title: 33 Block Diagram 58; title: 34 Functional Diagram of Oscillator and First R-f Amplifier 58; title: 35 Functional Diagram of Modulator and Rectifier 59; title: 36 Method of Modulation 60; title: 37 Functional Diagram of Tripler, Doubler, Power Amplifier, and Antenna Coupling Circuits   61; title: 38 Functional Diagram of A-f Amplifier 62; title: 47 Apparatus Location Diagram, End View and Detail Through Section A-A 78; title: 48 Apparatus Location Diagram, Top View 79; title: 49 Apparatus Location Diagram, Front View 80; title: 50 Apparatus Location Diagram, Bottom View 82; title: 52 Location of Alignment and Tuning Controls 97; title: 59 Voltage Diagram 125; title: 60 Resistance Diagram 127; title: 73 Schematic Diagram Showing Modifications During Manufacture 197; title: 74 Schematic Diagram 199; title: 75 Wiring Diagram 201; title: 77 Artificial Antenna Used for Testing 205; title: Mounting FT-237-(*):; title: 4 Oblique Front View 10; title: 5 Details 10; title: 61 Schematic Diagram 133; title: 62 Wiring Diagram 135; title: Remote Control Unit RM-29-D:; title: 19 Front View 23; title: 20 Interior View 23; title: 76 Schematic and Wiring Diagram 203; title: Dynamotors DM-34-(*), DM-35-(*), DM-36-(*), DM-37-(*):; title: 21a Dynamotor DM-34-(*) or Dynamotor DM-36-(*) 24; title: 21b Dynamotor DM-34-(*) or Dynamotor DM-36-(*) : Sub-base View 24; title: 22a Dynamotor DM-35-(*) or Dynamotor DM-37-(*) 26; title: 22b Dynamotor DM-35-(*) or Dynamotor DM-37-(*) : Sub-base View 26; title: 39 Schematic and Wiring Diagrams 64-65; title: 40 Apparatus Location Diagrams 66; title: 41 Dynamotor DM-34-(*) or Dynamotor DM-36-(*) : Exploded View 67; title: 42 Dynamotor DM-35-(*) or Dynamotor DM-37-(*) : Exploded View 68; title: Adapter FT-384-(*):; title: 53 Front View 101; title: 54 Back View 101; title: 55 Application to Radio Receiver BC-683-A 102; title: 56 Schematic and Wiring Diagram 103; title: Capacitors and Resistors:; title: 63 Types of Capacitors and Resistors 146; title: 64 Molded Mica Capacitors: Three-dot Color Code 150; title: 65 Molded Mica Capacitors: RMA Six-dot Color Code 151; title: 66a Molded Mica Capacitors: AWS Six-dot Color Code 152; title: 66b Molded Paper Capacitors: AWS Six-dot Color Code 153; title: 67 Tubular Ceramic Capacitors: RMA Color Code 153; title: 68 Fixed Resistors: RMA and AWS Color Codes 154; title: Artificial Antenna:; title: 77 For Testing Radio Transmitter BC-684-A 205; title: LIST OF TABLES AND CHARTS; title: Table Title Page; title: I List of Components and Other Items Required 3; title: II Channel and Crystal Frequencies 6; title: III Battery Currents 9; title: IV Selection of Dynamotors 29; title: V Meter Switch Readings (RECEIVER TUNE-OPERATE switch at OPERATE) 32; title: VI Meter Switch Readings (RECEIVER TUNE-OPERATE switch at RECEIVER TUNE)  129; title: VII Capacitor Characteristics 147; title: VIII Table of Replaceable Parts 156; title: IX List of Manufacturers 187; title: Chart; title: I Equipment Required for Servicing of Radio Receiver BC-683-A 121; title: II Servicing Procedure for Radio Receivers BC-683-A Not Mounted in a Vehicle 122; title: III Servicing Procedure for Radio Receivers BC-683-A Mounted in a Vehicle 123