A set of seven small tubes, five with glass envelopes, two with coated envelopes. Donor’s card reads: “Latest models (1957) of subminiature tubes from Tung-Sol Laboratories, courtesy of Walter Fichter ...
A 7-pin plastic base with domed envelope. Stamped on base: "Tung-Sol / Made in U.S.A. / 4-3"; on envelope: "59". In original box. Triple grid power amplifier tube for ...
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