Designed to operate as a high voltage low current rectifier, used often in TV amplifiers. New old stock * No longer available for export. MFR: GE SKU: 1K3A
Designed for use as a radio-frequency or intermediate frequency amplifier in compact battery-operated equipment. New old stock * No longer available for export. MFR: RCA, GE, Tung Sol SKU: 1L4
Designed for output service in compact, portable, light weight equipment. New old stock * No longer available for export. MFR: Raytheon, GE, RCA, Ge, Tung Sol SKU: 1S4
Designed to operate as a high effective oscillator slope New old stock * No longer available for export. MFR: RCA, Sylvania, Mullard, GE, Tung-Sol, Westinghouse, Raytheon, Realistic SKU:1R5
