Interesting Project on Russian Forum about Arduino controller for  a tube amplifier – Индикатор лампового УМ на Arduino nano 3 и LCD 2004

That Arduino development done with versions for tetrode and triode tube amplifiers.

G3SEK  triode control board I have inside my Amplifier built for GS-35B triode  triode-manual

I plan to integrate Arduino control with existing G3SEK triode board and share my results on this webpage.

G3SEK canceled his projects as many parts (by his explanation) are hard to find today. It is a time to switch to a newer technology to control amplifiers. Despite the fact that Solid State transistor amplifiers get more and more popular, the tube amplifiers are still popular and very reliable for a contesting activity.