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Manuals
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Lowe Electronics Manuals
Receiver
HF-225
Technical manual
Lowe Electronics HF-225 Technical Manual
General coverage receiver
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User manual
(35 pages)
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Contents
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Table of Contents
Contents
Block Diagram
RF Preamplifier
Input Attenuator and Band-Pass Filters
1St Mixer and 1St if
2Nd Mixer and 2Nd if
Detectors and AGC System
Optional Detector Unit
AF Stages
Power Supply
Frequency Configuration
Carrier Generator
Heterodyne Oscillator
Local Oscillator
PLL System
Microcontroller and Control Program
Controls
Frequency Memory
Display
Receiver Interface
External Keypad
Test Routines
Semiconductor Data
Signal Levels
Microcontroller Function and Display Driver Test
Frequency Memory Test
Reference Oscillator Adjustment
Local Oscillator Adjustment
Local Oscillator Alignment Test
Local Oscillator Coil Adjustment
Test and Alignment
Control Unit Test
IF Alignment
S-Meter Adjustment
Input Filter Check
Disassembly
Case Fastening Details
Option Unit Installation
Battery Option
Detector Option
Whip Aerial Option
Parts List
Receiver Specifications
Schematic Diagram
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