The Ultimate Guide to Tube Rolling: 12AU7
the ultimate guide to tube-rolling: 12AU7
A medium-gain small-signal tube
Small signal tubes: 12AU7 / ECC82
A medium-gain dual triode tube with many names for identical variants, or others that are designed for certain characteristics such as long life. They are still in production, made by New Sensor in Russia, Shuguang in China, and JJ Electronic in Slovakia.