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RCA 12AX7 - long black plates

RCA 12AX7 - long black plates
Price: $97.00
1 in stock
Item Number: 176
Manufacturer: RCA

This 1953 RCA 12AX7 tube has long black plates and a slanted D getter. The white print on the glass has the RCA logo. These 1950s 12AX7 tubes are getting very hard to find—grab one while supplies last!

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 “preamp grade”
on our custom noise testing equipment.


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.
Photo is a sample from the lot.

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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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