Percolator
FUZZ
OVERDRIVE
DISTORTION
Description
Drawing deep inspiration from the rare 1970s Interfax HP-1 Harmonic Percolator circuit originating out of a Milwaukee audio repair shop, this analog overdrive and fuzz pedal generates heavily textured saturation. The core schematic relies on asymmetrical clipping to intentionally emphasize even-order harmonics, preserving strict note definition and touch-sensitive string response even during dense high-gain chord passages. Top-panel modifications expand on the original layout by introducing a dedicated bias control knob to unlock gated, sputtering, or pseudo-octave tracking responses. A multi-position toggle switch alternates between a raw, unclipped transistor drive and a heavily compressed, diode-engaged fuzz profile, complemented by an internal trim pot capable of boosting overall gain and lower sub-octave rumble. The layout includes mechanical relay true bypass switching integrated alongside a dual-action footswitch that handles both standard latching operation and temporary momentary bursts of high-gain feedback.Media
Technical data
Width
000.00 mm
Depth
000.00 mm
Height
000.00 mm
Circuit type
analog
Voltage
9V DC, center negative
Current
10mA
