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Amperex 12AX7 / ECC83 - early O getter, phono grade

Amperex 12AX7 / ECC83 - various labels, 1960s
Price: $84.00
1 in stock
Item Number: 219O
Manufacturer: Amperex

This 1959 Amperex ECC83 / 12AX7 tube has gray plates and a large halo getter (I61 series). The red print has the Hammond logo, and the Heerlen factory code is etched in the glass.

This tube tests as new with balanced sections. It has been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section. It was 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

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


This tube is sold individually. It ships in a new white box with test results for current draw (mA) and transconductance (Gm). Matched sets, when available, are listed as Item 734.
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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