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Ok here goes, I'll try answering all the questions: 1) Pull the tube, take the amp off stand by...any hum? -----I pulled V1 and no hiss or hum whatsoever, I put V1 back in and pulled V2 and got hiss, I put V2 back in and pulled V4 and go no hiss or hum whatsoever. 2)if you have all the pots at...

Here's the problem: After a first observation of the pre-amp tubes which were all very used, I replaced all 6 of them with new ones but the problem on the rhythm channel is the same, I also tried changing out the power tubes with new ones but still the same problem. When I turn output volume to...

Hi well maybe I'm drifting off the topic a little, and mine is certainly not a criticism to mesa boogie, more of a "why did they choose to do it that way??" I've recently taken in a Mesa Boogie caliber DC-3 for repairs so what I'm asking is plainly dedicated to this series as I have no idea of...

Hi thankyou very much for your help.... just another technical question, I need to know how to test the DC resistance on both halves of the OT?

Hi thankyou very much for the help, does that German distributer only sell single EL84's?

Hi I'm a newbie to this board so please forgive me for any errors in posting my questions. I'm an amp tech here in Italy and one of my clients has bought in a Mesa Boogie DC-3 which he says after a few minutes playing it starts to crackle, I took a look at it while he was playing and the...