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TNMoC The National Museum of Computing - Valves

    
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Early computers were all valve devices as the transistor was not invented until the end of 1947. The Colossus code-breaking machine was developed by Dr T Flowers, a Post Office research scientist, as his work for telephone repeaters had shown how reliable valves could be if left on and not subject to power surges.
TNMoC is based on part of what was once the Bletchley Park estate and features a rebuilt Colossus that the late Tony Sale began in 1993. Other valve computers are complemented by all of the later developments - including modern day machines.
To build and maintain replicas of the early valve computers requires a large stock of active devices. Valves that have been donated include many that are not part of the computer story. From this archive we have borrowed some for inclusion in this museum.
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