Designed to be used in relay and grid-controlled rectifier applications. New old stock * New In Box * No longer available for export. MFR: RCA, Westinghouse, Sylvania, GE, Tung Sol, National SKU: 2D21
Designed for AF and RF power amplifier applications at frequencies up to 160 Mc. New old stock * No longer available for export. MFR: RCA, Amperex, GE, CEI SKU: 5696