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FROM CRYSTAL SETS TO 405 LINE TELEVISION

CONTENTS

INTRODUCTION

PART A: THE THEORY OF RADIO

CHAPTER 1: BASIC COMPONENTS

• Terms Defined
• Resistors
• Variable Resistors and Potentiometers
• Capacitors
• Inductors
• Transformers
• Tuned circuits
• Crystals
• Semiconductor Diodes
• Loudspeakers

CHAPTER 2: INTRODUCTION TO THE VALVE

• The Invention of the Valve
• The Basic Functioning of the Valve
• A Simple Triode Amplifier
• Development of Different Valves
• Faults Found in Valves
• Valve Characteristics
• The Cathode Biasing Resistor

CHAPTER 3: THE USE OF VALVES

• The coupling Of Valve Stages
• Tuned Amplifiers
• Oscillators
• Negative Feedback
• Tone Controls
• Volume Controls
• Automatic Volume Control
• Class B Push-Pull Amplifiers

CHAPTER 4: HOW A RADIO RECEIVER WORKS

• Modulation of A Radio Wave
• Crystal (“Cats Whisker”) Sets
• The Tuned Radio Frequency Receiver
• Regenerative Sets
• The Superheterodyne Receiver

CHAPTER 5: POWER SUPPLIES

• Dry Cell Batteries
• Accumulators
• Methods by Which Accumulators Were Charged
• Mains Radio A.C Supplies
• AC/DC Supplies

PART B: THE REPAIR OF RADIOS

CHAPTER 6: SAFETY

• Dealing With Live Chassis Equipment
• Mains Wiring
• Live Switch and Potentiometer Spindles
• Electrolytic Capacitors
• E.H.T Supplies
• Non Electrical hazards
• Extra Protection
• The Servicing Bench
• Restoration For Resale

CHAPTER 7: TOOLS AND SKILLS

• Reading Circuit Diagrams
• Tools Required
• Using Meters
• Soldering
• Identifying And Replacing Components

CHAPTER 8: DEALING WITH A “DEAD” RADIO

• Things To Check Before Switching On
• Switching On A set
• Isolating The fault
• Active Path Testing
• D.C And Resistance Measurements
• Testing By Component Substitution

CHAPTER 9: PARTIALLY WORKING SETS


• Low Gain
• Unwanted Noise
• Tuning Instability
• Heat Faults
• Intermittent Faults
• General Instability And Unwanted Fluctuation

CHAPTER 10: SETTING UP RADIOS

• Trimmers and Padders
• Setting up TRF Receivers
• Setting up Superhet Receivers

PART C: 405 LINE TELEVISIONS

CHAPTER 11: INTRODUCTION AND PRINCIPLE OF OPERATION

• How To Get A 405 Line T.V Signal
• The Cathode Ray Tube
• The Television Waveform
• The Receiver Described

CHAPTER 12: CIRCUIT TECHNIQUES IN 405 LINE SETS

• Tuners • Superhets Vs Straight Receivers
• RF And I.F Techniques
• Contrast Control
• Video Detection
• Video Amplification
• The CRT Revisited
• Sync Separation
• Time Base Oscillators
• Electromagnetic Deflection
• Power Supplies

CHAPTER 13: GUIDANCE IN REPAIRING 405 LINE TELEVISIONS

• Completely Dead Sets
• Tube Problems
• Tune Rejuvenation
• Timebase Problems
• E.H.T Regulation
• General Instability
• Sound On Vision
• Alignment

APPENDIX

1. Glossary of Terms Found in Old Literature
2. Suffixes (multiples and sub-multiples)
3. Radio Abbreviations
4. Landmarks in The Development of Radio
5. Useful Addresses
Copyright (c) 2002- 2010 Chris Garnett
Introduction
Contents
Chapter 1:BASIC COMPONENTS
Chapter 2:INTRODUCTION TO THE VALVE
Chapter 3:THE USE OF VALVES
Chapter 4:HOW A RADIO RECEIVER WORKS
Chapter 5:POWER SUPPLIES
Chapter 6:SAFETY
Chapter 7:TOOLS AND SKILLS
Chapter 8:DEALING WITH A “DEAD” RADIO
Chapter 9:PARTIALLY WORKING SETS
Chapter 10:SETTING UP RADIOS
Chapter 11:405 LINE TELEVISIONS: INTRODUCTION AND PRINCIPLE OF OPERATION
Chapter 12:CIRCUIT TECHNIQUES IN 405 LINE SETS
Chapter 13:GUIDANCE IN REPAIRING 405 LINE TELEVISIONS:
Appendix 1 to 5

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This page was last updated on 23rd April 2015.

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