Well, all credits for this one go to Aron Nelson for the layout and Analogguru for the schematic! I just condensed the layout a little bit, DIY-Layout style ;)
I built it and it sounds really good! Nice and grainy, lots of gain on tap and massive volume!
Lower C4 to about 10nF to raise the frequency the tone filter can boost/cut. There are reports on the internet about removing C4 but I strongly advise against that since it will turn the tone-knob into a high-shelf with massive amounts of high frequencies.
R6 is the minimum gain resistor, raise it for more distortion.
As with any overdrive, you may want to tinker with the D1 and D2 for other sounds. I settled on replacing D1 with a 1N60 and a 1N4148 in series and D2 with a 1N60.
Click here to see the bill-of-materials as a list or download it as a comma separated values file (.csv).
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