Designed to be used in the output stage of compact AC-DC receivers. New old stock * New in Box * No longer available for export. MFR: GE, Westinghouse, Sylvania, TUng-Sol, Delco, RCA SKU: 50B5
Designed for use in the audio-frequency power-output stage of radio receivers. New old stock * No longer available for export. MFR: Raytheon, GE SKU: 50C5
Designed to be used in line operated equipment having series connected heaters and the heater is tapped to permit use of a lamp. New old stock * New in Box * No longer available for export. MFR: GE, RCA, CBS SKU: 50DC4
