Am I addicted or what. You guys are all enablers. I was browsing through the shockzone and responded to a question about which amp to build, blah blah blah. I remembered that the valco site had a bunch of schematics and stuff. Well after posting the link I returned to it and started clicking on them myself. Then it showed up. The perfect amp to build inside the 5C3 chassis I screwed up a few years ago. An Ampeg J-12B. I don't think I'll need to purchase very many components either. PT - I got a few that will work tubes - 6SL7, 6V6, 5Y3 - got all those octal sockets - got a bunch big caps - 20uf 450volt - i think i have some. speaker - 12 inch - in shed, i think pots - i might have some pot with a switch - I'll need one of these resisters - got a bag of these somewhere. schematic - at the bottom I do have a question about the bypass cap on V1 pin 3 it says 100uf - thats it, no voltage. what might be the correct voltage on this cap? Oh one more thing. I've read that the tremelo misbehaves in many of these amps. any proactive ideas?