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Mullard 7025 / 12AX7 / ECC83 - phono grade

Mullard 7025 / 12AX7 / ECC83
Price: $109.00
Item Number: 256OEM
Manufacturer: Mullard

This 1962 Mullard 7025 is a low noise 12AX7 / ECC83 tube type. It has short gray plates with copper grid posts and a halo getter (I61 series). The red print on the glass has the Webcor logo and reads "Made in Great Britain."


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

This tube tests as “phono grade”—
the quietest range for noise and microphonics—on our custom noise testing equipment. It is an excellent choice for sensitive applications such as microphone preamps, V1 position in guitar amps, 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) for each triode section. 
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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