The Ultimate Guide to Tube Rolling: 12AX7

the ultimate guide to tube-rolling: 12AX7

A high-gain small signal tube

The 12ax7 / ecc83

These are miniature dual triodes with a high voltage gain, commonly used in preamplifiers. They are still in production, made by New Sensor in Russia, Shuguang and Quanzhen in China, and JJ Electronic in Slovakia.

Tung-Sol 12AX7