Designed to operate in the out put stages of audio amplifiers designed to operate from transformerless AC or AC/DC power supplies. New old stock * New in Box * No longer available for export. MFR: Dumont, Tung-Sol SKU: 60FX5
Designed to be used in power supplies of AC/DC battery radio receivers. New old stock * New In Box * No longer available for export. MFR: RCA, GE SKU: 117Z3