Op-Amp Big Muff W/ JHS & Aion Mods

[Ginsly]

This is the Dirtbox Layouts stripboard arrangement I modified to match Aion’s Corvus schematic. I also removed the Tone Bypass and added what is essentially the JHS gate toggle and Mids control. The yellow LED provides about the same Vf as three Si diodes in series, but feel free to cram those in here instead if you like!

 

[Chuck D. Bones]

Where can I find a schematic and/or description of the Pumpkin Patch mod?

 

[Ginsly]

Where can I find a schematic and/or description of the Pumpkin Patch mod?

This thread has a little info graphic in the first post, but I still haven't come across a schematic that integrates the specific Pumpkin Patch mods. It'd be easy to do, though.

I used the Aion Corvus as a starting point and then cut out D5, D6 & D7 (referencing Aion's schematic) and put them (or one yellow LED) on a switch with two green LEDs on the other side (on/off/on). Then I deleted R12 off of the Tone control and replaced it with a 25k pot + 300r resistor. I'd embed the Corvus schematic here but some people might think it has these mods on it already!