Telefunken 12AX7 / ECC83 - ribbed plates, phono grade

Price: $129.00

1 in stock

Item Number: 221

Manufacturer: Telefunken

Quantity:

Description

This 1950s 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!

Testing

This tube tests as new. 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. It is an excellent choice for sensitive applications such as V1 positions, microphone preamps, DA converters, and phono stages.

Pricing

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.

Related Products

Telefunken 12AX7 / ECC83 - smooth plates, matched pair

Price: $269.00

The 1962 Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have smooth plates. The white labels have Telefunken logos (partial) with matching date codes. Both tubes test as new with phono grade noise levels.