My curiosity got the better of me so I had to find out what this amp is all about…. Geebus, it seems like this thing was built in someone’s basement or something…. 🥴🤪. It doesn’t look all that complicated.
Here is my 2 cents on the thing… first try Chris Johnson of Parts Connexion; he is the former Owner and creator of Sonic Frontiers, Anthem and Assemblage. He has an electronic parts biz, and he fixes and modifies gear. He is a smart dude. I recently bought some seriously suped-up and completely refurb’d Power 3 tube amps from him and the labor rate I seem to remember was right at $75/hour. Email him, and describe your problem to him. I’m fairly certain he can fix it up good for you and upgrade the caps, resistors and wiring to give you a better amp.. Good luck.