Book description
Valve Radio and Audio Repair Handbook is not only an essential read for every professional working with antique radio and gramophone equipment, but also dealers, collectors and valve technology enthusiasts the world over.
The emphasis is firmly on the practicalities of repairing and restoring, so technical content is kept to a minimum, and always explained in a way that can be followed by readers with no background in electronics. Those who have a good grounding in electronics, but wish to learn more about the practical aspects, will benefit from the emphasis given to hands-on repair work, covering mechanical as well as electrical aspects of servicing. Repair techniques are also illustrated throughout.
This book is an expanded and updated version of Chas Miller's classic Practical Handbook of Valve Radio Repair. Full coverage of valve amplifiers will add to its appeal to all audio enthusiasts who appreciate the sound quality of valve equipment.
- A practical manual for collectors, owners, dealers and service engineers
- Essential information for all radio and audio enthusiasts
- Valve technology is a hot topic
Table of contents
- Cover image
- Title page
- Table of Contents
- Copyright page
- Dedication
- Preface
-
Part 1
- Chapter 1: Basic facts you need to know about electricity and magnetism
- Chapter 2: What you need to know about voltage, current, resistance and Ohm’s law
- Chapter 3: What you need to know about real life resistors
- Chapter 4: What you need to know about condensers
- Chapter 5: What you need to know about tuning
- Chapter 6: What you need to know about valves (1)
- Chapter 7: What you need to know about valves (2)
- Chapter 8: What you need to know about the principles of transmission and reception
- Chapter 9: Practical receiver design (1): battery operated TRFs
- Chapter 10: Mains valves and power supplies
- Chapter 11: What you need to know about the superhet
- Chapter 12: Some more special features found in superhets
- Chapter 13: Battery and mains/battery portable receivers
- Chapter 14: Automobile receivers
- Chapter 15: Frequency modulation
-
Part 2
-
Chapter 16: Tools for servicing radio receivers
- Solder ‘guns’
- Solder
- What about instruments?
- What ranges are required?
- The ohms-per-volt game
- What does ohms-per-volt mean in practice?
- The right way round for meters
- The signal generator
- The resistance and capacity bridge
- What about an oscilloscope?
- The output meter
- Valve testers
- The Mullard ‘high speed’ valve tester
- Chapter 17: A few words about safety precautions
- Chapter 18: A logical approach to fault finding
-
Chapter 19: Repairing power supply stages
- AC-only receivers
- Use the correct replacements
- Negative HT smoothing
- Low voltage negative bias
- RF by-pass and other HT decoupling condensers
- AC/DC receivers
- When the mains dropper fails
- Part AC-only sets
- Resistive mains cords
- Extra precautions necessary with AC/DC and part AC sets
- Barretters
- ‘Watt-less’ droppers
- Replacing ‘metal’ HT rectifiers
- Dealing with energised loudspeakers
- Chapter 20: Finding faults on output stages
- Chapter 21: Faults on detector/AVC/AF amplifier stages
- Chapter 22: Finding faults on IF amplifiers
- Chapter 23: Faults on frequency-changer circuits
-
Chapter 24: Repairing American ‘midget’ receivers
- Tackling faults on resistive line cords
- Extra precautions necessary with midget sets
- Types of midgets
- Rectifiers and HT smoothing
- No decoupling required
- Output stages
- Detectors in TRF midgets
- RF amplifiers in TRF midgets
- Detector/AF amplifiers in superhet midgets
- IF amplifiers
- Frequency changers
- RF amplifiers in superhets
- Aerials
- Chapter 25: Repairing faults on automobile radios
- Chapter 26: Repairing battery operated receivers
-
Chapter 27: Oddities
- Replacing the output valve
- The Ekco BV67 (Figure 27.2)
- The Philips V7A
- The ‘monoknob’ receivers
- Philips and Mullard pushbutton receivers
- The wartime civilian receiver
- Meeting the specifications
- Valves and secrecy
- An opportunity missed
- The design of the prototype in detail
- The AVC system
- The battery version
- Breaking the mould
- Likely problems in servicing
- Chapter 28: Repairing FM and AM/FM receivers
-
Chapter 29: Public address and high fidelity amplifiers
- Design features
- Output powers
- The Osram PX4 push-pull amplifier (Figure 29.1)
- The Osram PX25 (Class A) amplifier (Figure 29.2)
- The Osram PX25 (Class AB1) amplifier
- The Williamson KT66 amplifier (Figure 29.3)
- Preamplifiers (Figure 29.4)
- Repairing amplifiers
- Faults on and around output valves
- Preceding stages
- Common abbreviations
-
Chapter 16: Tools for servicing radio receivers
- Part 3
Product information
- Title: Valve Radio and Audio Repair Handbook
- Author(s):
- Release date: April 2000
- Publisher(s): Newnes
- ISBN: 9780080520421
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