Tube Amp Archive

Yeah good point. I will get it working then will mess with resistors. By the way, I checked voltages on the tubes. Seems like everything looks pretty normal to me. Any thing look off you to you? POWER TUBES (4 Ruby 6L6GC tubes) Pin# #1 #2 #3 #4 1 0 0 0 0 2 0 0 0 0 3 497V 493V 495V 495V 4 492V 489V 4...

Drew - thanks for the comment. No, I haven't done that and looking at the amp that could definitely be an issue. I will work on that tonight. Hopefully that helps. Haven't used deoxit. xtian - what is the board in the center of your amp? Mine doesn't have that board and judging from the schematic it...

Looking at the inside of your amp I don't see a bias resistor(s) in parallel with the 50/70 Ecap? Am I missing it?

Thanks, xtian! I uploaded a jpeg of the insides on this post, but it looks like it looses the comments I had; but hopefully everyone can see what I'm looking at. Sounds, good. I'm going to follow your schematic. you must have put in a variable bias as well? BTW, I pulled the tubes and measure 6.9Vol...

I bought an old Mitchell Pro-100 a couple days ago for 60 bucks. Felt like it is probably a pretty good deal if I can get it working. Right now the amp turns on and works but in general produces a very quiet signal that is distorted and kind of cuts out (for example if I turn it to 10 it sounds like...