Harmonic Percolator
A fuzz circuit based on the rare 1970’s Harmonic Percolator (HP-1). This circuit is a texture machine with a wide range of sounds. The harmonics knob is an effective gain control and the circuit interacts with the guitar’s volume with a similar “clean-up” to the germanium Fuzz Face. Rolling back the guitar volume will provide a range of gain levels and an articulate clean tone.
At the heart of this circuit is a 60’s Mullard germanium transistor and Mullard black glass germanium diodes. The circuit is true to spec with the addition of a diode switch (germanium, silicon, and clipping bypass). The stock germanium setting included on the original is warmer and softer. The silicon setting is a bit more immediate, aggressive, and bright. The center toggle position engages the clipping bypass setting and has more output and less gain.
A fuzz circuit based on the rare 1970’s Harmonic Percolator (HP-1). This circuit is a texture machine with a wide range of sounds. The harmonics knob is an effective gain control and the circuit interacts with the guitar’s volume with a similar “clean-up” to the germanium Fuzz Face. Rolling back the guitar volume will provide a range of gain levels and an articulate clean tone.
At the heart of this circuit is a 60’s Mullard germanium transistor and Mullard black glass germanium diodes. The circuit is true to spec with the addition of a diode switch (germanium, silicon, and clipping bypass). The stock germanium setting included on the original is warmer and softer. The silicon setting is a bit more immediate, aggressive, and bright. The center toggle position engages the clipping bypass setting and has more output and less gain.
A fuzz circuit based on the rare 1970’s Harmonic Percolator (HP-1). This circuit is a texture machine with a wide range of sounds. The harmonics knob is an effective gain control and the circuit interacts with the guitar’s volume with a similar “clean-up” to the germanium Fuzz Face. Rolling back the guitar volume will provide a range of gain levels and an articulate clean tone.
At the heart of this circuit is a 60’s Mullard germanium transistor and Mullard black glass germanium diodes. The circuit is true to spec with the addition of a diode switch (germanium, silicon, and clipping bypass). The stock germanium setting included on the original is warmer and softer. The silicon setting is a bit more immediate, aggressive, and bright. The center toggle position engages the clipping bypass setting and has more output and less gain.