Special Purpose

This tube is interchangeable with a 12AX7.

New Old Stock * No longer available for export
MFR: General Electric
SKU: 5751-JG-GP-GE

NOTE: Photos for example only. Box and Tube Labels may vary.

Designed to serve as a voltage amplifier or dual control applications when a grid base pin connection is implemented.
New old stock * No longer available for export.
MFR: Tung Sol, RCA, GE, Sylvania
SKU: 5725W

The General Electric 5 Star is a ruggedized version of the 5687. Lower in noise and microphonics than a standard 5687

New old stock * New In Box * No Longer available for export
MFR: General Electric Company
SKU: 5687-5-STAR-GE

New old stock * No Longer available for export
MFR: GE
SKU: 5687-GE
NOTE: Picture for reference only.

For use in audio amplifiers.
New old stock / New in box * No longer available for export
MFR: GE
SKU: 5760-GE

Designed for use in relay control and grid-controlled rectifier applications.
New old stock * No longer available for export.
MFR: GE
SKU: 5663

Designed to function as a VHF transmitter tube or as a power output tube in battery powered amplifier.

New old stock * New In Box * No longer available for export.
MFR: Hytron
SKU: 2E30-HYTRON

Designed for use in a specific cavity for stable local-oscillator service between 1000 and 1200 megacycles.
New old stock * No longer available for export.
MFR: GE
SKU: 2C46

Designed for stable operation as a plate-pulsed oscillator at frequencies up to 1300 megacycles.
New old stock * No longer available for export.
MFR: GE
SKU: 2C42