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The book provides a comprehensive overview of valves available in the UK from both British and foreign manufacturers.
With 340 pages and many black and white illustrations.
Available from the publishers
Speedwell
4 Mapledene, Caversham, Reading RG4 7DQ
0118 947 4813
ISBN 978-0-9537166-3-0
Background to the manufacturers and suppliers
Valve progress and development over a 20 year from the simple battery- operated triode to the modern multi-electrode valves
Details of more than 4,000 valves from over 50 suppliers
Photographs of over 1,000 valves
Tables show details of the various ranges of valves, together with their dates of introduction
Extended sections on audio power valves
Post Office valves for telephone repeaters and radio stations
Valves produced for the three Armed Services, including special types for radar applications
Extensive references
Separate data supplement with base connections
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