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Tung-Sol 12AX7A - long gray plates, phono grade, matched pair

Tung-Sol 12AX7 - long gray plates, phono grade, matched pair
Price: $149.00
Item Number: 579
Manufacturer: Tung-Sol

The 1965 Tung-Sol 12AX7A tubes in this precisely matched pair have long gray plates and halo getters. The white labels on the glass have the Tung-Sol logo.


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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