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Tung-Sol 12AX7 - long gray plates, phono grade, matched pair

Tung-Sol 12AX7 - long gray plates, phono grade, matched pair
Price: $144.00
1 matched pairs in stock
Item Number: 579
Manufacturer: Tung-Sol

The 1960s Tung-Sol 12AX7 tubes in this precisely matched pair have long gray plates and halo getters. The white labels on the glass have the Tung-Sol logo (partial).


Both tubes test as new with balanced sections.
They are precisely matched for both current draw (mA) and transconductance (Gm). They have been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section. They were tested at typical operating voltages on a laboratory grade Amplitrex AT1000 (manual setting, fixed bias mode). Learn more about our testing process here.
Noise and microphonics

These tubes test as "phono grade"--the quietest range for noise and microphonics--on our custom noise testing equipment. They are an excellent choice for sensitive applications such as microphone preamps, DA converters, and phono stages.


These tubes are sold as a matched pair.
They ship in new white boxes with test results for current draw (mA) and transconductance (Gm). Photo is a sample pair from the lot. Singles, when available, are listed as Item 178.
TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.

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