DAM Buzzotron

For Fuzz Friday, here's the D*A*M Buzzotron with a few modifications (based on H.A.'s suggestions).The Buzzotron is a tweaked Burns Buzzaround, which can also be built on this layout. What I've added is a master volume control and a ICL7660-based voltage inverter. This allows you to power the effect with a standard +9v supply and use PNP germanium transistors like the originals. Here's the Buzzotron and Buzzaround schematics for reference.

And if you're interested in building the original Buzzaround populate the board like this:

Burns Buzzaround

Here's an interesting take on the Tone Bender Mk III. Original units were positive ground, so the perf side of the layout reflects that, while the PCB side is set up for daisy-chainable negative ground.