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Amperex 12AX7 / ECC83 - matched pair, preamp grade

Price: $149.00
1 matched pairs in stock
Item Number: 734
Manufacturer: Amperex

The 1961–62 Amperex 12AX7 / ECC83 tubes in this precisely matched pair have gray plates and large halo getters (I65 series). The white print on the glass has The Fisher logo (may be partial/missing). The
Heerlen, Holland factory codes are etched in the glass.

These tubes test as new with balanced sections and high gain.
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 “preamp grade” for noise and microphonics on our custom noise testing equipment. They are an excellent choice for sensitive applications such as preamps.


These tubes are sold as a matched pair.
They ship in new white boxes with test results for each triode section. Photo is a sample pair form the lot. Singles, when available, are listed as Item 219.
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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