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Arcturus 12AX7 - black plates, phono grade

Arcturus 12AX7 - black plates, phono grade
Price: $79.00
1 in stock
Item Number: 302ARC
Manufacturer: Arcturus

This rare 1950s Arcturus 12AX7 tube has short black plates with copper grid posts and a D getter. The white print on the glass has the Arcturus logo.  

This tube appears new in box but it tests at about 80% for Gm on both 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 its original box with test results for current draw (mA) and transconductance (Gm) for each triode section.
Photo is of the actual tube.
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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