Table Of Contents - Eddystone EA12 Manual

Table of Contents

Overview3
List Of Contents3
Technical Data4
Typical Performance Figures5
Calibration And Re-Setting Accuracy5
Frequency Stability5
Circuit Description6
Agc Characteristic6
Autio Output And Response6
If Output6
The Tunable 1Set If7
The 100 Kc/S If Amplifiers8
Am Detector, Agc And Cathode Follower9
Cw/Ssb Detector10
Simplified Circuits Of Cw/Ssb Filters11
The Audio Stages And Power Supply12
The Crystal Calibrator12
Mechanical Construction13
Dimensions And Weight13
Cabinet13
Chassis Assembly13
Installation14
Dial And Drive Assembly14
Mounting14
Accessories15
External Connections15
Mains15
Aerial/Earth15
External Loudspeaker16
Telephones16
Mute, Relay And Acc Terminals16
Operation18
Control Functions18
Tuning18
Peak Rf Control18
Agc/Nl Switch19
Selectivity Control19
Slot Filter Control19
Gain Controls20
Standby Switch20
Bfo Pitch Control20
Calibrator Switch21
Cursor Switch21
Pre-Set Controls21
Muting Level21
Calibration Check22
Meter Zero Adjustment22
Nl Adj.22
Maintenance23
Lubrication23
Replacing A Faulty Fuse23
Ghanging Valves24
Replacing A Faulty Dial Bulb24
Cleaning The Scale And Scale Window24
Instructions For Fitting A Replacement Cursor Dvie Wire24
Removing The Cabinet25
Re-Alignment26
Checking Adjustment Of The Slot Filter27
Re-Alignment Of The Bfo28
Re-Alignment Of The Tunable If Section28
Re-Alignment Of The 2Nd Local Oscillator29
Re-Alignment Of The 1St If Bandpass Circuit30
Re-Alignment Of The Rf Circuits30
Re-Alignment Of The Aerial Filter31
Overall Sensitivity Check31
Voltage Analysis32
List Of Component Values, Tolerance And Ratings33
Spares List38
Panoramic Display Unit41
Block Schematic Diagram42
Plan View43
Circuit Revisions44