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Manuals
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DRAKE Manuals
Receiver
SPR-4
Technical manual
DRAKE SPR-4 Technical Manual
Communications
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Technical manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
General Description
Features
General Specifications
Power Consumption
Size and Weight
Semiconductor Compliment
Viewing Angle Options
Installation
Unpacking
Location
Power Requirements
Speakers
Headphone Operation
Rear Controls and Connectors
Power
Fuse
Speaker
Anti Vox and Injection
Dial Lamps
Antenna Jack
Accessory Crystal Installation
Front Panel Operating Controls
Rear Controls and Connections
Operation
Operating Controls
Simplified Operating Procedure
Dial Calibration
Block Diagram
Principles of Operation
Loop Amplifier
R.F. Amplifier
First Mixer
Second Mixer
I.F. System
Detection Systems
CW and SSB Detection
AVC System
Muting
S-Meter
Top Alignment Adjustment Points
Bottom Alignment Adjustment Points
Alignment
Removing Covers
Trouble Shooting
Alignment Instructions
I.F. Alignment
Preselecting and Injection Alignment
Notch Filter Alignment
S-Meter Adjustment
Accessories
Service Data
Service Data for SPR-4 Accessories
Measurement Conditions
Schematic Diagram
Voltage Chart
Circuit Board
Pictorial Wiring Diagram
D.C. Voltage Chart
Circuit Board Installation Diagram
Circuit Board Locations
Transistor Lead Configuration
Loop Antenna Circuit Board
R.F. Amplifier Circuit Board
Range Crystal Oscillator Circuit Board
Accessory Crystal Circuit Board
Premixer Circuit Board
Premixer Output Circuit Board
1St Mixer Circuit Board
2Ns Mixer Circuit Board
1St if Amplifier Circuit Board
2Nd if Amplifier Circuit Board
S-Meter Circuit Board
Notch Filter Circuit Board
BFO Circuit Board
AM Detector Circuit Board
Audio Amplifier Circuit Board
Power Supply Circuit Board
Spare Parts List
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