Owlbear Overdrive

culturejam · Post by **culturejam** » 08 Dec 2009, 01:53

I started off with the first mu-amp stage of the BSIAB and followed it up with the last two stages of a typical transistor Big Muff. Then I tweaked it until it sounded good. (crappy) Sound clip here:

Thanks to RnFnR for some keen observations during the early development of this one.

I call it an overdrive, but some folks might think it's on the heavy side. It's a little heavy.

Verified schematic attached.

Notes:

I added a RF rejection cap at the input (marked "Cx"). This can be omitted if not needed.

If there is too much dirt for your tastes, you can omit C2 and/or C10 to take it down a notch.

Greg · Post by **Greg** » 08 Dec 2009, 05:10

Sounds really good mate.
Nice note decay !

SPeter · Post by **SPeter** » 08 Dec 2009, 13:47

Greg_G wrote:Sounds really good mate.
Nice note decay !

1+!

culturejam · Post by **culturejam** » 08 Dec 2009, 13:49

Greg_G wrote:Sounds really good mate.
Nice note decay !

Thanks!

And that clip was before I made one final tweak (adding the bypass cap on Q4). The dirt is now a bit crisper with more high-end definition. And there's just a touch more gain and some more output volume.

SPeter · Post by **SPeter** » 08 Dec 2009, 21:14

culturejam wrote:
Greg_G wrote:Sounds really good mate.
Nice note decay !
Thanks!

And that clip was before I made one final tweak (adding the bypass cap on Q4). The dirt is now a bit crisper with more high-end definition. And there's just a touch more gain and some more output volume.

RnFR · Post by **RnFR** » 09 Dec 2009, 08:06

right on! cool to see it turned out well. and it sounds great! that decay really is nice!