BIRD Digital RF

Designed to function as a power rectifier in high voltage systems
New old stock * New In Box * No longer available for export.
MFR: Tung Sol
SKU: 5W4

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 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 for high frequency voltage amplification
MFR: Tung Sol, Sylvania, Hytron
SKU: 7V7
New old stock * No longer available for export.