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GENERAL RADIO COMPANY Manuals
Amplifier
1231-B
Operating instructions manual
GENERAL RADIO COMPANY 1231-B Operating Instructions Manual
And null detector
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Contents
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Table of Contents
Table of Contents
Section 1. INTRODUCTION
Purpose
1. 2 Description
General
Controls
Connections
Accessories
Section 2. PRINCIPLES of OPERATION
General
Linear Amplifier
Semilogaritlunic Null Detector
Use with Type 874-LBA Slotted Line
Frequency Response
Section 3. INSTALLATION
Battery
A-C Power Supply
Relay-Rack Model
Section 4. OPERATING PROCEDURE
General
Use as an Amplifier
Use as a Null Detector
Operation as Standing-Waveindicator
Frequency Selection
Test for Adequate R-F Input for Low VSWR Measurement Assuming 50% Modulation
Measuring Standing-Wave Ratio
Section 5. ACCESSORIES
Tuned Circuits
Adjustable Attenuator
Adjustable Filter
Section 6. SERVICE and MAINTENANCE
General
Cabinet Removal
Tube Voltages and Resistance Measurements
6.4 Zero Coincidence
Meter Sensitivity
Parts List
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OPERATING INSTRUCTIONS
TYPE
1231-B
AMPLIFIER
AND
NULL DETECTOR
GENERAL
RADIO
COMPANY
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