PERK This is SkullFXR PERK DeLuxe ready for sale!

A Unique Circuit and a Remarkable Tone

The Harmonic Percolator is a rare and highly sought-after, fuzz pedal produced by Interfax in small numbers in the 1970's. The Harmonic Percolator has a unique hybrid Ge/Si circuit design and because of its unique design features, the pedal's circuitry is designed to favor even-order harmonics. The even-order harmonics create the unique and captivating smooth musical sonic character of the Harmonic Percolator. Even though the Harmonic Percolator is capable of high levels of fuzz, it retains a surprising amount of clarity and definition, Dial up the volume and pull back the harmonic knob and you have a beautiful dynamic clean tone rich and blossoming with tone. Turn up both knobs and you have searing distortion. ..

With the Perk Deluxe I added a bias knob that lets this kitty purr or roar. Really opened up it's potential.

Spec sheet on this beautiful beast below:

NOS USSR MN40 germanium transistor

NOS National Semiconductor Gold-Pin 2n3565

ERO film caps

Siemens electrolytic cap

NOS USSR D211a's

Alpha 24mm potentiometers

Gorva Switches

Rean-Neutrik Jacks

1590XX