Synthrotek Dirt Filter

[FUZZZZzzzz]

Some of you guys might know this company, but I found out that they share the schematic for their new Dirt Filter as well. Worth a try..
http://store.synthrotek.com/DIRT_Filter_Kit_9V_Version

and the schematic here:
http://www.synthrotek.com/products/modular-circuits/dirt-filter/dirt-filter-schematic/

[Mark Hammer]

Is that the MS-20 filter?

[slacker]

Yes, it's an MS-10/MS-20 style filter. Interesting how they're running the whole thing off 5 Volts and using a TL072, that probably explains why it's so dirty, the opamp's got very little headroom. Might have to give it a try, thanks for sharing.

[slacker]

I'm confused now, the schematic shows a 5 Volt regulator but the build instructions for either version don't populate this, running it off 12 Volts for the synth module and 9 Volts for the stand alone version.

[anotherjim]

Maybe closer to the Monotron filter. That only uses 5volt, but, IIRC, running on LM324's. That may explain the "original" 5volt on the scheme.
Nice & simple as filters go.

[slacker]

Yeah, that's probably it.

[yeahyeah]

Hmmm, I might try adding a sag control for more dirt options!