TABLE OF CONTENTS
Introduction
5
Tools and Supplies............................................................................... 5
Before You Start Building ..................................................................... 6
Soldering Tips: ............................................................................. 6
Desoldering Tips: ......................................................................... 7
Work Habits: ................................................................................ 7
Sorting and Reading Resistors:.................................................... 8
Reading Capacitors:..................................................................... 8
Diodes: ......................................................................................... 9
Transistors: .................................................................................. 9
Integrated Circuits: ....................................................................... 10
Parts List .............................................................................................. 11
Parts Placement Diagram .................................................................... 12
Step-By-Step Assembly........................................................................ 12
Phase 1: ....................................................................................... 13
Phase 2: ....................................................................................... 15
Phase 3: ....................................................................................... 17
PC Board Inspection: ................................................................... 20
Testing and Alignment.......................................................................... 20
Operating Instructions .......................................................................... 21
Receiver or Scanner Operation.................................................... 21
In Case of Difficulty .............................................................................. 22
No Signal Filtering: ....................................................................... 22
Intermittent Filter Operation: ........................................................ 22
Filter Stops Filtering: .................................................................... 23
No Speaker Audio: ....................................................................... 23
Theory of Operation and Specifications ............................................... 23
Circuit Description: ....................................................................... 23
Specifications: .............................................................................. 23
Enclosure ............................................................................................. 23
Schematic............................................................................................. 23
