MOSFET Fuzz Circuit I PUBLIC

MOSFET Fuzz Using A Dual Depletion-Mode MOSFET IC

MOSFET fuzz circuit using two dual JFET-input op-amps for gain, and two dual depletion-mode MOSFET ICs for the fuzz effect. Depletion-mode MOSFETs are reported to produce a more tube-like fuzz than do enhancement-mode MOSFETs.. Controls Include: Input Attenuation, Input Tone, Drive 1, Gain 1, Drive 2, Gain 2, and Volume. Range above 0 dBV is from 42 Hz to 24 kHz with all controls at 50%. Suitable for 6/7-string guitar or 4-string bass, or 5-string bass with high C (instead of low B), all in standard tuning (not for 8-string guitar, or 5-string bass with low B instead of high C, or for 6-string bass). Emphasizes highs. Maximum gain = +30.8 dBV @ 2.5 kHz with all controls at 50%, or +50.5 dBV @ 2.5 kHz with Atten 0% but all other controls 100% (which also greatly expands the bandwidth). Suitable for stomp-box or rack-mount applications. The battery can be replaced by a regulated single-polarity +9V DC power-supply providing >= 20 mA of current. Though simulator verified, treat the circuit as experimental. Breadboard test if before committing to a soldered build. And house in a grounded metal enclosure.