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- -8.00 USD
Bulk pack pentodes manufactured for Ediswan by British Thomson-Houston Co. Ltd. These high frequency Mazda octal-based pentodes were designed for use in the video output stage of early television receivers. Excellent quality metallised glass finish, SX or KY production date code for 1939. Tubes are printed EDISWAN VALVE SP42 MADE IN ENGLAND B.V.A. followed by production code.
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