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Mullard 12AX7 / ECC83 - yellow badge, phono grade

Mullard 12AX7 / ECC83 - yellow badge, phono grade
Price: $124.00
1 in stock
Item Number: 554Y
Manufacturer: Mullard
Description

This 1964 military spec Mullard 12AX7A / ECC83 tube was made in Great Britain (I61 series).
It has a halo getter and short gray plates with copper grid posts. The yellow print on the glass has the Mullard shield logo with BVA insignia. The Blackburn, UK factory code etched in the glass.

Testing

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. See product options for current availability.
 
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, DA converters, and phono stages.


This tube is sold individually.
Matched pairs, when available, are listed as Item 685. Photo is of the actual tube. It ships in a new white box with test results for current draw (mA) and transconductance (Gm).

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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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