PJS

OK, it looks like it is a FET switching setup, but the switching bit is mostly missing from the schematic. If you see the lower...

I don't know if that is the maximum gain you are supposed to get. I don't have one. I do know that I like the sound though. Will...

Before I went about removing a dual gang pot I would be measuring it. Power off. Multimeter on ohms setting connected to the wiper and...

Where does the design come from? A drop of 3.77V across that resistor would indicate that the circuit is drawing just under 40mA. It...

What are you using for a power supply? Try a battery clip soldered to a power jack and see if you still get squealing. Some power...

The wiring in the documentation is correct. You shouldn't be using a TRS cable, you need a regular mono guitar cable. Tip goes to the...

If you are looking at parts of the circuit that are unique to -1, then on the schematic you are basically looking at R11 through Q2, IC...

So, with level and drive all the way down you still get the tone? What happens with level down, drive down and then shift the mix from...

Also, where did you get your J201s? They are notorious for being faked in TO92 packaging

Don't go swapping out parts until there is some idea what the problem is. Does the oscillation occur at all settings of all controls or...

It sounds like a capacitor is charging up and when it gets to full charge it is stopping the power supply. I would be checking the...

I could be a bit wrong about my understanding, but my understanding of an op amp is that it works by sending a signal out the output...

I plug an old MP3 player into the input jack using a 3.5mm to 3.5mm cable (standard MP3 player or phone audio cable) and a 3.5mm to...