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Sylvania 12AX7WA - long gray plates, phono grade

Sylvania JAN 12AX7WA - long gray plates, halo getter
Sylvania JAN 12AX7WA - long gray plates, halo getterSylvania 12AX7WA - long gray plates, halo getter
Price: $69.00
2 in stock
Item Number: 312
Manufacturer: Sylvania

This 1971 military spec Sylvania 12AX7WA tube has long gray plates with copper grid posts and a halo getter. The green print on the glass reads "JAN 12AX7WA" and 12AX7WA is etched in the glass.

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. They are an excellent choice for sensitive applications such as V1, microphone preamps, DA converters, and phono stages.


This tube is sold individually. 
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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