Hi guys, I've been trying to debug this for weeks now. Everything works absolutely fine, except for the mid pot. It has no effect whatsoever on the tone. I've check my pot and it is not dead, I've run a hot iron and a hacksaw through my tracks, checked wiring, but no luck.
I'm tired and going slightly mad about this, but I'm pretty sure I count two 10nF capacitors and the vero but only one on the schematic, and only two 47nF cap on the vero instead of three on the schematic.
If I'm wrong the the vero layout is correct, any ideas what could be wrong ?
you're definitely correct that the 10nF cap off tone 1 should be 47nF, that's my mistake and surprised no one caught it sooner, so i'll update the layout as soon as i can.
now, as for the issue with your build. are you sure everything is working correctly? without some pictures of your build it's hard to say. assuming the tone pot is working correctly, just not the mids pot, my guess would be one of the mids wires is misplaced.
definately post some pictures of the top & bottom of you're build. will significantly help in trying to help you out.
To be a bit blunt, in my experience that is exactly how a Big Muff “mids pot mod” tends to work. I bought an EQD Hoof and I’ll be damned if there’s any difference when you adjust that knob. It may be very dependent on the amplifier or something.
In general I think this modification is a marketing gimmick to counteract the idea that Big Muffs are useless in a live mix. Slap that knob on there and people assume the pedal is more useable
The Skreddy type mids switch has a noticeable effect. Haven’t heard a mids pot actually make a noticeable difference on a Big Muff personally
In my opinion it is possible that there is a build error or it is possible that the pot is highly ineffective by design