Highly-Modified Muff Fuzz Circuit 1 PUBLIC

Highly Modified Electro-Harmonix "Muff Fuzz" Circuit with Selectable 2-Voice Fuzz and Fender-Style Tone-Stack

Highly modified Electro-Harmonix Muff Fuzz circuit, featuring two fuzz voices and a Fender-style 3-band tone-stack with customized part-values. Main modifications include addition of the tone-stack, use of two soft-clipping diode arrays for obtaining fuzz, and specification of a dual JFET-input op-amp IC, ideal for accepting passive guitar signals directly. Controls Include: Input Gain, Drive 1, Fuzz enable switch, Fuzz Type switch (Deep or Normal), Fuzz Symmetry Switches (SSW), Fuzz Trim, Output Gain, Drive 2, Bass, Mid, Treble, and Volume. Suitable for stomp-box or rack-mount applications. Battery can be replaced by a regulated single-polarity +9V DC power-supply providing >= 20 mA of current. Though verified, treat as experimental. Breadboard test before committing to a soldered build. Range: 20 Hz to > 20 kHz. Caution! Extreme high-gain circuit. Maximum gain = +52.7 dBV (Vo/Vi = 431.5) @ 6.3 kHz with all controls at 50%, or +60.8 dBV *Vo/Vi = 1096) with Gain controls at 100% but all other controls at 50%. Avoid using all controls at 100% except as a brief worst-case test during breadboarding.