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 to function as a combined AM detector, FM detector, and audio frequency voltage regulator. New old stock * New In Box * No longer available for export. MFR: Westinghouse, Tung Sol, Zytron SKU: 5T8
Designed to be used as mixers at frequencies as high as 600 megacycles. MFR: RCA, GE , Sylvania, Amperex, Tung-Sol SKU:6J6 New old stock * No longer available for export.