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Equipment information:

Receiver -- Drake DSR-1

Manufacturer:
Drake
Model: DSR-1
Date:
Category: Radio, Communication
Group: Receiver
Description:
Information:

This Receiver is a commercial grade communications Receiver employing the most up to date solid state devices and circuitry. It provides continuous coverage from 10 kHz to 30 MHz with the received frequency displayed on a digital readout to the closest 100 Hz. All frequency injections of the Receiver are controlled by a phase-locked digital synthesizer which allows incremental frequency selection in 10, 1 and 0.1 MHz steps. The remaining 0 to 0.1 MHz is continuously adjustable by a highly stable variable Oscillator from the fine tuning knob on the front panel. Modular construction on easily accessible printed circuit boards is used throughout this Receiver. The generous use of dual gate MOS-FET transistors in this receiver’s circuitry contributes to its superior intermodulation, wide AVC dynamic range and overload performance. The front panel controls allow the operator to select frequency, AM or SSB detector, I.F. bandwidth, AF gain, BFO pitch, fast or normal AVC, manual RF gain, and Drake’s highly effective series gate noise blanker. Independent sideband (ISB) is a built-in feature of the Receiver. Separate I.F. crystal filters, I.F. amplifier, detector and audio output circuits allow two simultaneous communications channels (USB and LSB) to be employed on one frequency assignment, doubling the information receiving capacity. The Receiver may be powered from 115 or 230 VAC, 50 to 420 Hz. An inverter is available, as an accessory, for operating the Receiver from a 12 or 24 VDC source.







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Service and User Manual -- Drake -- DSR-1

Manual Type: Service and User Manual Drake-9252-Manual-Page-1-Picture
Pages: 104
Size: 5.94 Mbytes (6231771 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date:
Quality: Scanned document, reading partly badly, partly not readable.
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Downloads: 134 since 09 August 2017
Information:

This manual is presented in 5 chapters and is arranged for the convenience of the operator and service technician as follows: Chapter I Introduction (Self explanatory) Chapter II Preparation for Use. Describes the procedures to be followed prior to operation. Chapter III Operation. Presents step-by-step front panel settings for optimum reception in each of the various modes. Chapter IV Theory of Operation. Describes all critical circuits and networks and references pertinent schematics and block diagrams. Chapter V Maintenance. Provides sufficient information for servicing by an experienced technician including illustrated parts lists, schematics, and critical disassembly/reassembly instructions. CHAPTER I INTRODUCTION ... 1-1 1-1. GENERAL DESCRIPTION ... 1-1 1-2. MANUAL COVERAGE ... 1-1 SPECIFICATIONS ... 1-2 CHAPTER II PREPARATION FOR USE ... 2-1 2-1. UNPACKING ... 2-1 2-2. LOCATION ... 2-1 2-3. POWER REQUIREMENTS ... 2-1 2-4. FUSES ... 2-1 2-5. ANTENNAS ... 2-1 2-6. SPEAKERS ... 2-1 2-7. HEADPHONES ... 2-1 2-8. MUTE ... 2-1 2-9. IF OUTPUT ... 2-1 2-10. ISB WIRING ... 2-2 2-11. LINE AMP OUTPUT ... 2-2 2-12. GROUND ... 2-2 2-13. REPACKING ... 2-2 CHAPTER III OPERATION ... 3-1 3-1. CONTROLS AND DISPLAYS ... 3-1 3-2. OPERATING PROCEDURES ... 3-1 3-5. SINGLE OR DOUBLE SIDEBAND SUPPRESSED CARRIER RECEPTION ... 3-1 3-6. CW RECEPTION ... 3-1 FRONT PANEL CONTROLS ... 3-4 3-7. AM RECEPTION (DOUBLE SIDEBAND) ... 3-4 3-8. INDEPENDENT SIDEBAND (ISB) RECEPTION ... 3-4 CHAPTER IV THEORY OF OPERATION ... 4-1 4-1. GENERAL ... 4-1 4-7. RF AMPLIFIER ... 4-2 4-8. FIRST MIXER ... 4-2 4-9. SECOND MIXER ... 4-2 4-10. FIRST IF AMPLIFIER ... 4-3 4-11. NOISE BLANKER ... 4-3 4-12. THIRD MIXER (COMMUNICATIONS CHANNEL) AND SECOND IF Amplifier . . 4-3 4-13. THIRD MIXER (ISB CHANNEL) AND SECOND IF AMPLIFIER ... 4-3 4-14. FILTER AMPLIFIER ... 4-4 4-15. PRODUCT DETECTOR (COMMUNICATIONS CHANNEL) ... 4-4 4-16. PRODUCT DETECTOR AUDIO BUFFER (COMMUNICATIONS CHANNEL) ... 4-4 4-17. AM DETECTOR AND AUDIO Amplifier (COMMUNICATIONS CHANNEL). . . . 4-4 4-18. PRODUCT DETECTOR (ISB CHANNEL) ... 4-4 4-19. PRODUCT DETECTOR AUDIO BUFFER (ISB CHANNEL) ... 4-4 4-20. BFO ... 4-4 4-21. AUDIO LINE Amplifier (COMMUNICATIONS CHANNEL) ... 4-4 4-22. AUDIO LINE Amplifier (ISB CHANNEL) ... 4-4 4-23 AUDIO POWER OUTPUT AMPLIFIER ... 4-5 4-24. FREQUENCY SYNTHESIZER ... 4-5 4-25. LOCKED Oscillator INJECTION (VCO) ... 4 5 4-32. FREQUENCY READOUT ... 4-7 4-37. FREQUENCY COUNTER ... 4-8 4-38. COUNTER OVERFLOW AND UNDERFLOW ... 4-9 4-39. POWER SUPPLY ... 4-10 CHAPTER V MAINTENANCE ... 5-1 5-1. SERVICE DATA ... 5-1 5-2. DISASSEMBLY AND REASSEMBLY ... 5-1 5-3. SYNTHESIZER/RF ASSEMBLIES ... 5-1 5-4. COUNTER NO. 1 ... 5-1 5-5. VFO AND DIAL LOCK ... 5-2 5-6. INTEGRATED CIRCUITS ... 5-2 5-7. TEST EQUIPMENT ... 5-2 5-8. REPAIR AND REPLACEMENT ... 5 2 5-9. PARTS ORDERING INFORMATION ... 5-2 5-10. ALIGNMENT AND CALIBRATION ... 5-4 5-11. IF SECTION ALIGNMENT ... 5-5 5-12. IF ALIGNMENT - NORMAL CHANNEL ... 5-5 5-13. IF ALIGNMENT - ISB ... 5-5 5-14. NOISE BLANKER ALIGNMENT ... 5-5 5-15. PRODUCT DETECTOR (BFO) COIL ALIGNMENT ... 5-4 5-16. VARIABLE BFO ALIGNMENT ... 5-4 5-17. AUDIO Amplifier ALIGNMENT ... 5-5 5-18. LINE Amplifier ALIGNMENT ... 5-5 5-19. SYNTHESIZER SECTION ALIGNMENT ... 5-5 5-20. VCO ALIGNMENT ... 5-5 5-21. BALANCED MIXER TUNING ... 5-6 5-22. RF Amplifier ALIGNMENT ... 5-6 5-23. 20 MHz LOCKED Oscillator ALIGNMENT ... 5-11 5-24. 25.05 MHz TRAP ADJUSTMENT ... 5-11 5-25. 5.05 MHz TRAP ADJUSTMENT ... 5-11 5-26. 15 VOLT Power Supply SETTING ... 5-11 5-27. S METER CALIBRATION ... 5-11 5-28. VFO CALIBRATION ... 5-11 5-29. FREQUENCY CALIBRATION ... 5-12 5-30. NOISE BLANKER ADJUSTMENT ... 5-12 5-31. MISCELLANEOUS TESTS ... 5-12 5-32. PARTS LISTS ... 5-12

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