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Telefunken 12AX7 / ECC83 - ribbed plates, phono grade

Telefunken 12AX7 / ECC83 - ribbed plates
Price: $149.00
2 in stock
Item Number: 221
Manufacturer: Telefunken

This 1959 Telefunken ECC83 / 12AX7 has ribbed gray plates and a diamond imprint on the base. The white print on the glass has the Telefunken logo and says “Made in Western Germany.”

Don't miss this opportunity to hear one of the best sounding—and hardest to find—12AX7s ever made!

This tube tests as new with high gain and 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 V1 positions, 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 pairs, when available, are listed as Item 401.
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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