RunoffGroove Matchbox Question

[RickL]

I'm putting the parts together to build this in the next couple of days and was wondering about the bottom 180p cap in the switched tone control. It's in parallel with a 10n cap and adds less than 2% to the 10n. Won't this just be swallowed up by the tolerance of the 10n?

I'll probably just leave it out but I wondered if anyone had experimented and found any noticable difference with or without this cap.

[B Tremblay]

You're correct.  The 180pF at the bottom can be omitted with no ill effects.  We left it on the schematic for the sake of authenticity.