BIRD Digital RF

Designed for use as a combined detector, amplifier, and automatic-volume-control tube in radio receivers.
Manufactures RCA, Tung-Sol, GE, Raytheon, Sylvania,Philco, Westinghouse
SKU: 6SQ7
New old stock * No longer available for export.

Designed for use in resistance coupled circuits as a voltage amplifier or phase inverter

New old stock * No longer available for export.
MFR: Tung-Sol
SKU: 6SL7WGT-JAN-CTL-TS

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 to operate as a IF or RF amplifier.
MFR: Tung-Sol, RCA, GE, Dumont, CBS, Sylvania
SKU: 12AC6
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

Two Mica, Grey Plate, and a round Halo Getter. Used in audio amplifiers.
MFR: Tung Sol
SKU: 12AY7
New Old Stock * No longer available for export

New old stock / New in box * No longer available for export
MFR: Sylvania, USA 
SKU:12AT7WA-TS

Designed to be used as an audio amplifier tube
New old stock * New In Box * No longer available for export.
MFR: Tung-Sol
SKU: 6189-TS

Designed to be used as a high gain voltage amplifier and a cathode type phase inverter
New old stock * No longer available for export.
MFR: Tung Sol
SKU: 7247-TS