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Toshiba 12AX7 - phono grade, matched pair

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

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.
 
Testing

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.

 
Pricing

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.

Related Products

Toshiba 12AX7 - short gray plates, various labels
Toshiba 12AX7 - various labels, phono grade
Price: $44.00
Toshiba 12AX7 - various labels, phono grade
This 1960s Toshiba 12AX7 tube was made in Japan and labeled for various companies. It has short gray plates and a halo getter. Excellent quality vintage 12AX7 tubes at an affordable price. Tube tests as new with phono/V1 grade noise levels.
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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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