SparkPlug FuzzDrive

This circuit is a very slight mod on Dragonfly's excellent JFET boost called the Sparkle Boost. Basically, all I did was add some clipping diodes to ground right at the output. It turns an otherwise relatively clean boost into a low-to-moderate overdrive.

Omit the diodes and you're right back at a cleanish boost. You could also wire the diodes on a switch to alternate between drive and boost. Or, you could use a pot to blend the diodes in and out of the circuit.

Here's the layout:

And here's the PCB transfer:

Print this at 200 dpi

Here's a shot of the completed board from the top side: