Browse Categories

Sylvania 7025 / 12AX7 - long gray plates, phono grade

Sylvania 7025 / 12AX7 - long gray plates, phono grade
Price: $77.00
2 in stock
Item Number: 192
Manufacturer: Sylvania

This 1960s Sylvania 7025 is a low noise 12AX7 tube type. It has long gray plates with copper grid posts and a halo getter. The yellow print on the glass has the Sylvania logo.

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

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.
It ships in its original box with test results for current draw (mA) and transconductance (Gm). Matched pairs, when available, are listed as Item 100. Photo is a sample from the lot.
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.

Shopping Cart
Your cart is empty.