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Description
Elmer T. Cunningham double filament tubular triode vacuum tube, or Audio Tron, ca. 1915, made by the Audio Tron Sales Company of San Francisco. Spiral copper grid, aluminum cylindrical anode. Labels (2) appear to be early, perhaps pre-production. With separate leads from each grid and plate. Paper labels read "Audiotron" and "16 16 6" See also 2003-1-289, and 2003-1-291
Type
image
Identifier
3D6ECDAA-35F5-4A02-8EA7-833357654489 2003-1-290
Subject
Audion Communication Radio--Receivers and reception Radio industry Sound equipment & supplies Triodes Vacuum-tubes Audio Tron Sales Company (San Francisco) Amplifiers (Electronics) Cunningham, Elmer T
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