Telefunken guaranteed these long-life tubes would last 10,000 hours, averaged over 100 tubes. New Old Stock * No longer available for export MFR: Telefunken * Made in Ulm, Germany SKU: EF805S-TELE
Designed primarily to be used as a horizontal deflection amplifier in TV receivers New old stock * No longer available for export MFR: Sears, Pro Comm, Curtis Mathes, El Menco, Made in Japan. SKU: 30KD6-GEN
Designed to be used in electronic computers where its small size and energy requirements make it useful with transistors. New old stock * No longer available for export. MFR: Amperex SKU: 6977
Designed to function as a general purpose medium mu double triode tube with two electrically independent triodes. New old stock * No longer available for export. MFR: GE SKU: 7370
Designed for use as an AF amplifier, RF power amplifier, and a grid modulated RF power amplifier. Used * No longer available for export MFR: Westinghouse SKU: 828-P
Designed for use as an AF amplifier, RF power amplifier, and a grid modulated RF power amplifier. New Old Stock * New In Box * No Longer available for export MFR: RCA SKU: 828-RCA
Designed for use as an AF amplifier, RF power amplifier, and a grid modulated RF power amplifier. Used * No longer available for export MFR: RCA SKU: 828-RCA-P
Designed for use as an AF amplifier, RF power amplifier, and a grid modulated RF power amplifier. Matched set of two tubes New old stock * No longer available for export. MFR: National Electronics SKU: 828MP