Tube Amp Archive

I am in the process of building a #124 clone. I notice there is some debate about the resistor coming off the 350K OD trimmer. Most layouts and discussions say it is 220K. The schematic by odurboy(?), and his comments, are inclined toward a 120K resistor. What are people's opinion on this? Has anyon...

Does Mouser sell any dpdt push-button switches suitable for a dumble type foot switch? Also, the leds, are they the 1.7v types?

well, for what its worth, I did some reading in TUT 1 regarding the long tail inverter, and, as some here have mentioned, the output of that inverter circuit is inherently unbalanced. This is corrected by applying different voltages to the plates, giving a balanced signal output from both sides. Twe...

How does one figure out where to adjust the 5K trimmer feeding the PI plate resistors? Is it a voltage reading? A resistance? Something I need to use a scope to measure?

Hi all, I am new here. Recently decided I need a dumble like amp. I have several fender tweeds, , fender browns, and blackfaces, both big and small. I have big and small Marshall types, vox types, and a few assorted other types. Most, but not all, of my amps are clones. I asked myself, what don't I ...