Ridiculous ! lolPut new preamp tubes in it and it sounds brand new. I forgot how powerful and snarly this beast is. Bought it new 35 years ago...never gigged with it, been in storage for 20 years. Mint condition. Thought people may enjoy because rarely do you see these in Mint.
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I didn't, my bad ........I think I will take it to a tech now but it all seems normal but all the original caps are in it from 1987. probably not good to run it like this. I'm a noob , I know. been out of the music business for 20 years.
I hope you used a Variac to bring it back from the dead.