does anyone know why the resistor would be jumpered ? Presumably to increase output volume. See the thread about the B&M Fuzz which is a similar circuit: https://www.freestompboxes.org/viewtopic.php?f=19&t=7055 A word of advice, that 220K resistor in series with the volume pot is completely...

Did they just use whatever came to hand? I suppose ultimately a 100K pot is a 100K pot.

sonicvi wrote:The pots are usually either all log taper or log for the volume and sustain and linear for the tone.

It might not be too easy to see in my pics above, but mine has a linear pot for volume and log pots for sustain and tone.

I've got one of these:
I love the sound but the low output means I can't play it live. Don't want to mod my original one so I have ordered one of peps1's PCBs. I'll leave out the 220K output resistor when I build it.