anders wrote

Here is a verified layout of Basic Audio Zippy Fuzz drawn from schematic of

PedalPCB ZipperMPS6513's seems to be hard to come by but any low gain NPN Si works fine. I settled on a couple MPSA06's.

Excellent!

You don't happen to have a recording you could share... do you?

And looking at that schematic, am I right in thinking that 1k on the switch changes the resistance of the collector from 47k to 2ohms (1/Rt = 1/R1 + 1/R2; or 1 divided by 47,000 + 1,000 = 2.08)?

**Edit: **In case anyone cares, it's actually 979.16ohms. My first mistake was to not correctly use the formula I posted (it should be 1 divided by 47,0000 + 1 divided by 1,000, then divide that total by 1). My second was to use the wrong formula: since they are only two resistors in parallel the formula is R1 x R2, then R1 + R2, and divided the totals.