Tube Amp Archive

sluckey wrote: ↑Wed Jun 27, 2018 10:09 pm 6G3 is a fixed bias amp. I would expect the tube to self destruct if you ground the grid.

yikes!!

I have a Fender 6g3 Deluxe build where I added a switch to ground one of the power tube grids. It actually works pretty well and the tone of the amp did not change very drastically. It does knock a few decibels of the sound in this psuedo single ended mode. It's not an ideal solution for running si...

Hello All, I’m wanting make some modifications to the classic fender AB763 circuit for a new build I’m doing. I want to make it cathode biased for the power tubes and am planning on using an existing power transformer that I have. I’ve worked out the bias resistors for each power tube, works out to...

What is the optimal p2p impedance in triode mode? Also, it seems that your master volume won't work all that well with the PP/SE knob. 85% plate dissipation is awfully bold for a PP while still cold for an SE, you won't like the sound once you turn off one of the valves I bet. I played an amp a few...

Hello All, I’m wanting make some modifications to the classic fender AB763 circuit for a new build I’m doing. I want to make it cathode biased for the power tubes and am planning on using an existing power transformer that I have. I’ve worked out the bias resistors for each power tube, works out to ...