Designed for used in TV receivers and in frequency divider and complex-wave generator circuits of electronic musical instruments. MFR: Tung-Sol, RCA SKU: 6FA7 New old stock * No longer available for export.
It is intended for power rectifier service in AC operated equipment or for use with storage battery and vibrator in automotive receivers or amplifiers. MFR: RCA, Philco, Zytron SKU: 7Z4 New old stock * No longer available for export.
Designed for use as a detector and intermediate-frequency or audio-frequency amplifier. MFR: RCA SKU: 12SF7 New old stock * No longer available for export.
Designed for use as a combined detector, audio amplifier and automatic volume control tube. MFR: RCA, Sylvania SKU: 12SR7 New old stock * No longer available for export.
Designed to operate as a diode detector, avc rectifier and as a audio amplifier in AC, AC-DC, and DC circuits. MFR: RCA, GE SKU: 12SW7 New old stock * No longer available for export.
Designed to function as a general purpose diode in 12v circuits often found in automobiles MFR: RCA SKU: 12U7 New old stock * No longer available for export.
