12AU7WA 6189 ECC82 Sylvania, long black plates, triple mica, square getter

Description

Sylvania 12AU7WA/6189/ECC82 looks new, tests new but may have seen very minor use. Call it burned-in…

These were taken from military spare test equipment that was just sitting around and was never really used. These tubes are absolutely clean, look unused and test accordingly with at least 95% of a new tube in terms of transconductance/gm and emission. All tubes are super balanced in terms of gm!

Very small batch available!

These tubes feature long black plates, a triple mica construction for low microphonics and square getters. This is another super rare early version of the 12AU7WA/6189.

Tubes came in a bulk crate and will hence be supplied in a plain white box.

Each and every tube will carefully be tested before shipping to guarantee best performance.

We also do have other ECC82/12AU7 in stock from various manufacturers. Please ask…