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Icom Manuals
Transceiver
IC-25H
Instruction manual
Icom IC-25H Instruction Manual
144 mhz fm transceiver
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Instruction manual
(36 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Specifications
Description
Multi-Purpose Scanning
Dual Vfo's
Outstanding Performance
Installation
Unpacking
Location
Power Requirements
Antenna
Microphone
Control Functions
Front Panel
Rear Panel
Under the Top Cover
Operation
How to Tune
Preset Frequencies
Tuning Control
Transferring VFO Frequency
Duplex (Repeater) Operation
Resetting the Offset Frequency
Memory Channel Operation
Scanning Operation
Memory-Write
Memory Reading
Programmed Scan
VFO Full Range Scan
Resuming Scan
Priority Function
Receiving
Transmitting
Inside Views
Main Unit Side
PLL Unit Side
Circuit Description
Outline
Receiver Circuits
Antenna Switching Circuit
IF Circuit
Audio Circuit
Squelch Circuit
Transmitter Circuits
Oscillator, Modulation Circuits
Audio Frequency Circuit
Mixer Circuit
Driver Circuit
Power Amplifier Circuit
ALC Circuit
PLL Unit
Power Supply Circuit
Local Oscillator Circuit
Mixer, Low-Pass Filter
Reference Frequency Generator Circuit
Phase Detector and Loop Filter Circuit
Buffer Amplifier Circuit
VCO Unit
Driver Unit
Clock Pulse Generate Circuit
Scan and MIC Up/Down Control Circuit
CPU Control Circuit
Frequently Control, Display and I/O Circuit
Troubleshooting
Block Diagram
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Specifications
2
Microphone
3
Receiver Circuits
4
Power Amplifier Circuit
5
Troubleshooting
6
Block Diagram
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