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EA12
Manual
Eddystone EA12 Manual
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Overview
List of Contents
Technical Data
Typical Performance Figures
Calibration and Re-Setting Accuracy
Frequency Stability
Circuit Description
AGC Characteristic
Autio Output and Response
IF Output
The Tunable 1Set if
The 100 Kc/S if Amplifiers
AM Detector, AGC and Cathode Follower
CW/SSB Detector
Simplified Circuits of CW/SSB Filters
The Audio Stages and Power Supply
The Crystal Calibrator
Mechanical Construction
Dimensions and Weight
Cabinet
Chassis Assembly
Installation
Dial and Drive Assembly
Mounting
Accessories
External Connections
Mains
Aerial/Earth
External Loudspeaker
Telephones
Mute, Relay and ACC Terminals
Operation
Control Functions
Tuning
Peak RF Control
AGC/NL Switch
Selectivity Control
Slot Filter Control
Gain Controls
Standby Switch
BFO Pitch Control
Calibrator Switch
Cursor Switch
Pre-Set Controls
Muting Level
Calibration Check
Meter Zero Adjustment
NL Adj.
Maintenance
Lubrication
Replacing a Faulty Fuse
Ghanging Valves
Replacing a Faulty Dial Bulb
Cleaning the Scale and Scale Window
Instructions for Fitting a Replacement Cursor Dvie Wire
Removing the Cabinet
Re-Alignment
Checking Adjustment of the Slot Filter
Re-Alignment of the BFO
Re-Alignment of the Tunable if Section
Re-Alignment of the 2Nd Local Oscillator
Re-Alignment of the 1St if Bandpass Circuit
Re-Alignment of the RF Circuits
Re-Alignment of the Aerial Filter
Overall Sensitivity Check
Voltage Analysis
List of Component Values, Tolerance and Ratings
Spares List
Panoramic Display Unit
Block Schematic Diagram
Plan View
Circuit Revisions
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