Small Stone Color Depth Mod Help

[eightsevenzero]

I have done lots of searching but can't find anything. I would like to add a color depth control to my Small Stone like in this video. I'm wondering if anyone knows what this guy does? Thanks!

[iainpunk]

theres a pair of resistors that determine the amount of feedback vs the amount of clean signal entering in to the allpass filters. this pot f*cks with that ratio.

i think its in series with the switch and one of those resistors. i have a trimmer in my green Russian small stone. just locate the side of the switch that has one of its connections going to ground, de-solder the middle connection and put a pot in between those points. i believe i did a 500k trimmer but im not really sure.

hope this helps, cheers

[Kevin Mitchell]

Sounds about right, iaianpunk!

So we know that it only works in "Color" mode. My guess would be that they replaced the 27K resistor between the 3.3K/4.7K & .1uF cap junction with a 25K pot. Less resistance = more "regen". Easy enough.

I'm actually waiting on someone's Small Stone to arrive so I can rehouse and heavily mod.

[iainpunk]

nice.

i did quite a few mods myself as well.
my favourite is the wet only mod, gives a whacky vibrato, especially when together with the univibe mod.

cheers