Designed for use as a detector and intermediate-frequency or audio-frequency amplifier. MFR: RCA, Tung-Sol SKU: 6SF7 New old stock * No longer available for export.
Designed for use as a high-gain radio-frequency or intermediate-frequency amplifier in a radio receiver. MFR: Tung-Sol, Sylvania, Raytheon SKU: 6SK7GT New old stock * No longer available for export.
Gated beam discriminator suitable for FM and TV limiter and discriminator applications and section one of beam pentode for audio output services. MFR: Westinghouse, GE, RCA SKU:6Z10 New old stock * No longer available for export.