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ID number: BIRRC-P0901 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Bell Telephone Labs Title / Object name: Cavity magnetron - Early U.S. version Object type: Cavity magnetron Place made: North America: USA Date made: 1940-41 Materials: Mainly copper and glass Measurements: Block diam. 5.0 cm, height 3.5 cm, Fin diam. 7.5 cm, overall length 21 cm |
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After the first commercial cavity magnetron E1189 was made in the U.K. by Mullard and operated on 29 June 1940, large-scale production was started in U.S.A. This exhibit looks identical to the famous first one made in U.K. and will be one of these U.S. magnetrons. It produced microwaves of wavelength 10 cm. Inscriptions / Translations: Western Electric Bell Telephone Labs |
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