Suggestions for this mod to a Maxon OD-880?

[greeny23]

so heres the schem-
http://analogguru.an.ohost.de/193/schematics/Maxon_OD-880_OverDrive.gif

i am currently running a 22uF electrolytic cap and a 10k resistor as a feedback loop between R7 and R10 and it boosts and tightens the gain really nicely.

any other suggestions for this combination or other things to do to the pedal?

[slideman82]

You could try a switch for a Si diode/LEDs combination, distortion opens up, becomes louder and crunchier! Also, if you want a bassier response, put a switch for C4, 47n/220n for example. A 68 - 100pF cap between lug 2 of Q2 and R10 - R11 point would roll off some high frecuencies (it will work in parallel with clipping diodes too). And if you want to work a little bit, try removing all IC's, installing sockets and trying different single op amps like TL071's, TL061's, TL081's, CA3140's, NE5534 (I think it's the single version of 5532) or a combination among them. Well, that's a start! You coud remove C6 and place a DPDT, with C6 at one side, and a external circuit for tone control, like a Baxandall, for example... but you'll have to make other PCB and place new pots for it (I would go for multiturn trimpots, the ones that have a 2mm screw).