Rojo, sorry for the zombie post ... I have a very similar amp and it works. It is the Earth Sound Revival 4x10. At first glance, it looks like a decent Bassman copy, but then, if you look closer, it looks like a kinda-cool but cheap Bassman copy. The questions are, were you happy with the results? Do you still play it or have you sold it? Do you think, I should be putting the time into overhauling it or should I just get rid of it? I mean, it's sort of special and a nice piece of vintage gear. I do not know much about how to deal with the transistor preamp and whether I should put any time in servicing / changing the transistors neither. So I am afraid of wasting my time and money on trying to overhaul it. Any feedback most welcome! Thanks a lot.