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Toshiba 12AX7 - phono grade, matched pair

Toshiba 12AX7 - matched pair
Price: $89.00
Item Number: 902
Manufacturer: Toshiba (Tokyo Shibaura Electric)

The 1963–64 Toshiba 12AX7A / ECC83 tubes in this precisely matched pair have short gray plates and halo getters. The red print on the glass has the 3M logo
. These are excellent quality vintage 12AX7 tubes at an affordable price.

These 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/V1 grade”—the quietest range for noise and microphonics—on our custom noise testing equipment. They are an excellent choice for sensitive applications such as phono stages, V1 positions, microphone preamps, and DA converters.


These tubes are sold as a matched pair. Tubes ship in new white boxes with test results. Photo is a sample from the lot. Singles, when available, are listed as Item 903.
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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