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Wireless: From Marconis Black-Box to the Audion (Transformations: Studies in the History of Science and Technology)

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Electronic Valve - Marconi, Triode, Type R, circa 1918 - Museum ...
General purpose high vacuum ("hard") triode developed during World War 1, based on the French TM valve. Manufacturer: Edison Swan Electric Co. Ltd. For ...

Electronic Valve - Marconi, Triode, Round Type N, 1914-1915 ...
2VPIF triode - ?Round Type? triode made for Marconi's Wireless Telegraph Co. Ltd. between 1914 and 1915. The asbestos in the exhaust tip was used to ...

Electronic Valve - Marconi Genova, Triode, Type 42A, circa 1916 ...
Triode, manufactured by Marconi Genova, Italy introduced around 1916 and used for high frequency amplification or in radio transmission. This early type was ...

Marconi Receiving Valves 1938
Codes: Marconi, Western Union, Bentley's, A.B.C. 5th & 6th editions. Pamphlet No. LL 56 October ... HD23, and the first battery triode-hexode the X23. '—_—— ...

Some Important British Valves
C - Marconi 1913. C. This was a soft triode valve with a lime-coated platinum filament, designed by H J Round of the Marconi Company and manufactured by ...