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A Klystron manufactured by CPI. CPI International, Inc. is the holding company for Communications & Power Industries, the largest [citation needed] manufacturer and rebuilder of electron devices (primarily vacuum tubes) in the United States.
The company was established in 1889 as the Ya. M. Aivaz (Russian: Я. М. Айваз) Factory. [4] Svetlana was a major producer of vacuum tubes.In 1937, the Soviet Union purchased a tube assembly line from RCA, including production licenses and initial staff training, and installed it on the St Petersburg plant. [5]
Western Electric Export Corporation (or simply Western Electric) is a manufacturer of vacuum tubes and high end audio gear. Based in Rossville, Georgia, the company builds an ultra-premium version of the 300B electron tube. It traces its roots to 1872 with the Bell Telephone Company and the original Western Electric. The original AT&T-based ...
The San Francisco Bay area was one of the early centers of amateur radio activity and experimentation, containing about 10% of the total operators in the US. Amateur radio enthusiasts sought vacuum tubes that would perform at higher power and on higher frequencies than those then available from RCA, Western Electric, General Electric, and Westinghouse. [1]
Sylvania was also a manufacturer of both vacuum tubes and transistors. In 1942, the company changed its name to Sylvania Electric Products Inc. During World War II, Sylvania was chosen from among several competing companies to manufacture the miniature vacuum tubes used in proximity fuze shells due to its quality standards and mass production ...
Amperex tubes were original equipment parts in many models of Tektronix and Hewlett-Packard test equipment. Although Amperex stopped making vacuum tubes long ago, hoards of new old stock (especially the original "Bugle Boy" series) are traded for profit, and other manufacturers produced compatible tubes more recently.
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The Mullard Radio Valve Co. Ltd. of Southfields, London, was founded in 1920 by Captain Stanley R. Mullard, who had previously designed thermionic valves (US term: vacuum tube) for the Admiralty before becoming managing director of the Z Electric Lamp Co. [2] The company soon moved to Hammersmith, London and then in 1923 to Balham, London.