Tube Amp Archive

Hello all, I have done some more finagling of values. My test rig was initially a basswood bodied greco with Lace Deathbuckers tuned to E standard which does not really have a modern metal sound. After trying it with other instruments - I have an agile 8 string with duncan blackouts, and an alder ja...

OK so I've made my mods and I'm mostly pleased. I haven't bothered making the diagram for the "master" volume, just replaced the 1m resistor with an A1m pot. I used a 1nf bright cap. The audio taper pot isn't really sufficient to do much - attenuation only really occurs at about 1, after that it's p...

OK, spent some time looking into the lar/mar. It sounds like a good solution, but I have both a presence control as well as the Hasse "attitude" mod for the NFB circuit. From what I understand the Post PI MV will affect the NFB somewhat and I'm pretty happy overall with the voicing with the presence...

Ahhh now that's an interesting idea. I'll look into that! Many thanks for the help.

i mean, r26 could be replaced with a 1M pot but all the way up would be the same as just having the resistor there But then I could use the second pot as a master volume - turn it to 2 or 3, which would restrict output volume, and crank V2 up, which would increase preamp gain? so with drive and vol...

Yeah, of course, more distortion - the way I envisioned it V3a could act as another "gain" stage. There's not really room on the board to just add another valve :D The amp is basically stock with some finagling of the cathode bypass capacitors. I did start with Hasse's suggestions for coupling caps ...

Hello all! This forum is super cool, I have had a good look around and learned some interesting stuff, and I did search but unfortunately haven't been able to answer this one. I have a carvin VM100, and while I've already modified the gain channel as per the very helpful Mr Hasse, I need MORE gain. ...