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EA12
Eddystone EA12 Manuals
Manuals and User Guides for Eddystone EA12. We have
1
Eddystone EA12 manual available for free PDF download: Manual
Eddystone EA12 Manual (46 pages)
Brand:
Eddystone
| Category:
Radio
| Size: 4 MB
Table of Contents
Overview
3
List of Contents
3
Technical Data
4
Typical Performance Figures
5
Calibration and Re-Setting Accuracy
5
Frequency Stability
5
Circuit Description
6
AGC Characteristic
6
Autio Output and Response
6
IF Output
6
The Tunable 1Set if
7
The 100 Kc/S if Amplifiers
8
AM Detector, AGC and Cathode Follower
9
CW/SSB Detector
10
Simplified Circuits of CW/SSB Filters
11
The Audio Stages and Power Supply
12
The Crystal Calibrator
12
Mechanical Construction
13
Dimensions and Weight
13
Cabinet
13
Chassis Assembly
13
Installation
14
Dial and Drive Assembly
14
Mounting
14
Accessories
15
External Connections
15
Mains
15
Aerial/Earth
15
External Loudspeaker
16
Telephones
16
Mute, Relay and ACC Terminals
16
Operation
18
Control Functions
18
Tuning
18
Peak RF Control
18
AGC/NL Switch
19
Selectivity Control
19
Slot Filter Control
19
Gain Controls
20
Standby Switch
20
BFO Pitch Control
20
Calibrator Switch
21
Cursor Switch
21
Pre-Set Controls
21
Muting Level
21
Calibration Check
22
Meter Zero Adjustment
22
NL Adj.
22
Maintenance
23
Lubrication
23
Replacing a Faulty Fuse
23
Ghanging Valves
24
Replacing a Faulty Dial Bulb
24
Cleaning the Scale and Scale Window
24
Instructions for Fitting a Replacement Cursor Dvie Wire
24
Removing the Cabinet
25
Re-Alignment
26
Checking Adjustment of the Slot Filter
27
Re-Alignment of the BFO
28
Re-Alignment of the Tunable if Section
28
Re-Alignment of the 2Nd Local Oscillator
29
Re-Alignment of the 1St if Bandpass Circuit
30
Re-Alignment of the RF Circuits
30
Re-Alignment of the Aerial Filter
31
Overall Sensitivity Check
31
Voltage Analysis
32
List of Component Values, Tolerance and Ratings
33
Spares List
38
Panoramic Display Unit
41
Block Schematic Diagram
42
Plan View
43
Circuit Revisions
44
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