A screen grid tetrode for aircraft radar units. A 4-pin base with ceramic plate, top contact, T-shaped envelope with neck. Stamped: "CW-715B / Western Electric / Made ...
A plastic 4-pin base with top contact, domed envelope. Stamped on base: "Raytheon"; on envelope: "32 / Made in U.S.A." Reference: https://www.radiomuseum.org/tubes ...
John Allan is vice president of marketing for CPI-Eimac Division; he read our series of comments about rebuilt tubes. John points out that the CCA transmitter uses a grounded grid triode, most likely ...
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