Designed to function as a half wave rectifier in photoflash circuits as it has a low filament voltage. New old stock * No longer available for export. MFR: Tung Sol SKU: 5517
Designed to be used in class A and class C amplifiers and is tested as a frequency doubler at an output frequency of 400Mc. New old stock * No longer available for export. MFR: 5851 SKU: Tung Sol
Designed for use in resistance coupled circuits as a voltage amplifier or phase inverter. Black base and band on glass. MFR: Tung-Sol SKU: 6SL7GT-GP-TS New old stock * No longer available for export.
Designed for service as a detector diode, AVC rectifier, and a high gain resistance coupled amplifier. New old stock * No longer available for export. MFR: Raytheon, National Union SKU: 12Q7GT