Table of Contents
Section l: GETTING STARTED
A. General Introduction to Receiver Design and Features
B. About this Manual and T-KIT
C. Working with the Kit Parts Before Assembly
D. Detailed Kit Parts List
E. Checklist of supplies and tools needed for assembly
F. Component Identification Information
G. Building Electronic Kits: The Essentials
H. Overview of Kit Assembly Phases
Section ll: Kit Assembly and Alignment
Detailed Table of Contents
Installing Parts on the Boards
Phase 1.0 Display Board Assembly
Notes on Main Board Assembly
Phase 2.0 Logic Section and Display Drivers
Phase 3.0 VCO's and PLL ("Phase-Locked Loop")
Phase 4.0 Receiver Audio, AM and Product Detectors,
455 kHz IF Amplifier, AGC system
Phase 5.0 2nd Mixer, 2nd LO, Clarifier control
Phase 6.0 RF Input, 1st Mixer, 1st LO amplifier
Phase 7.0 Final Assembly and Alignment
Section III: Reference Information
Detailed Table of Contents
Specifications: T-KIT Model 1254
Model 1254 Operating Instructions
1 . Functions of Primary Controls
2. Storing Frequencies in Memory
3. Recalling or Tuning Memory Frequencies
4. Tuning AM signals
5. Tuning SSB signals
6. Tuning CW signals
7. Microprocessor RESET
8. Memory Battery Test
Circuit Description
Model 1254 Receiver Block Diagram
Practical Operating Information
DC Power Supply, Audio, Antennas,
Special installations, SWL basics and more
GLOSSARY: Terms and Abbreviations
Component Reference Index
Troubleshooting Guide
including Chart of Significant Test Voltages
Checking for Solder Bridges
1254 - Getting Started –2
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