Lowe Electronics HF-225 Receiver Manuals

Manuals and User Guides for Lowe Electronics HF-225 Receiver. We have 2 Lowe Electronics HF-225 Receiver manuals available for free PDF download: Technical Manual, User Manual

Lowe Electronics HF-225 Technical Manual (51 pages)

General Coverage Receiver

Brand: Lowe Electronics | Category: Receiver | Size: 4 MB

Contents
1
Block Diagram
2
RF Preamplifier
4
Input Attenuator and Band-Pass Filters
4
1St Mixer and 1St if
4
2Nd Mixer and 2Nd if
4
Detectors and AGC System
5
Optional Detector Unit
5
AF Stages
6
Power Supply
6
Frequency Configuration
7
Carrier Generator
7
Heterodyne Oscillator
7
Local Oscillator
7
PLL System
8
Microcontroller and Control Program
9
Controls
11
Frequency Memory
11
Display
11
Receiver Interface
12
External Keypad
14
Test Routines
15
Semiconductor Data
17
Signal Levels
25
Microcontroller Function and Display Driver Test
26
Frequency Memory Test
26
Reference Oscillator Adjustment
26
Local Oscillator Adjustment
27
Local Oscillator Alignment Test
27
Local Oscillator Coil Adjustment
27
Test and Alignment
28
Control Unit Test
28
IF Alignment
29
S-Meter Adjustment
29
Input Filter Check
29
Disassembly
30
Case Fastening Details
31
Option Unit Installation
32
Battery Option
32
Detector Option
32
Whip Aerial Option
32
Parts List
33
Receiver Specifications
37
Schematic Diagram
40

Lowe Electronics HF-225 User Manual (35 pages)

General Coverage Receiver

Brand: Lowe Electronics | Category: Receiver | Size: 1 MB

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Lowe Electronics HF-225 Receiver Manuals

Lowe Electronics HF-225 Technical Manual (51 pages)

Table of Contents

Lowe Electronics HF-225 User Manual (35 pages)

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