Illustrated History of Philips Radio valves,
2nd Ed. 1995
An interesting document covering early Philips tubes with data and pictures.
ISBN 0-64623757-8
| Illustrated History of Philips Radio valves | |
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Fin. Stewart, Illustrated History of Philips Radio valves, 2nd Ed. 1995 An interesting document covering early Philips tubes with data and pictures. ISBN 0-64623757-8 |
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