Tools, Tones and Toys for Guitarists
This is a slightly modded Interfax Harmonic Percolator that I made today. It’s an odd little circuit – it can run from clean, a bit overdriven, then into distortion, and finally to overly compressed fuzz madness. The range of sounds are so broad, it’s almost worth setting it up as a dual pedal (which I … Read more
The earliest version of the infamous HP was actually a dual silicon transistor circuit. It also had a few addons and a few big cap fifferncies compared to the later Ge/Si version. Not sure how it sounds but I guess some of might be interested to to try this one out. The 2N3565 transistors had … Read more
Since I’ve been on a bit of a Harmonic Percolator thing lately, I thought I might do some 0.15″ mojo layouts using Albini / Mad Bean Pepper Spray values. Here’s one built by Sean of Spiller Instruments. Looks great, as do his other builds. INTERFAX HARMONIC PERCOLATOR, ALBINI VALUES – VERO LAYOUTS
Haven’t done a tag board build for a while – so here’s a classic. INTERFAX HARMONIC PERCOLATOR HP-1 – TAGBOARD LAYOUT Being tag board, I’ve used 1/2w resistors and axial caps. You could use something more practical (smaller), but if that’s what you want to do, I would recommend using a different layout, as this is … Read more
I would recommend breadboarding this prior to committing to solder. The Interfax Harmonic Percolator is very tweakable, and sometimes takes some adjusting to get it right. There’s pages on the Harmonic Percolator on DIY Stompboxes. INTERFAX HARMONIC PERCOLATOR – POINT TO POINT LAYOUT
