The idea for this project is to stack three Fetzer (ROG) based circuits with the right combination of FETs , biased to perfection yeilding you a big Champ? style tone out of your amp without needing to crank the amp itself. It is easily moddable to taste, to suit your own rig.
Bias has to be adjusted for the 3 transistors, so this is not a beginner project.
You get full technical support at the GuitarPCB.com forum, membership is free of course! There is even more detailed build information available there:
Here is the direct link to the building docs, including layout and schematic: