RO SuperZog Real-Tube Fuzz PUBLIC

Richter Original "SuperZog" Real-Tube Fuzz for Guitar

Richter Original "SuperZog" real-tube fuzz circuit for electric guitar, with 5 tube-stages, shunt-diode array, and 3-band Fender-style tone. Controls Include: Input Level, Fuzz enable switch, Fuzz symmetry switches, Fuzz Depth, Drive, Intensity, Bright switch, Bass, Mid, Treble, Stack Sum, and Volume. Uses 3 different tubes; one 12U7 twin-triode (not 12AU7), one 12AL8 triode+tetrode, and one 12DZ6 pentode. All tubes are space-charge types designed to use single +12V DC supply-voltage on their heaters AND plates. Design is based on a combination of highly-modified versions of the Garnet "Herzog" distortion unit and the Supro model 1606 guitar-amplifier. V1 can be overdriven by a boost or other pedal on the input, while V1 can overdrive V2, which can overdrive V3, which can overdrive V4, but V5 will be difficult to overdrive. The diode clipping array uses Schottky diodes to obtain fuzz in addition to tube distortion. The symmetry switches set the harmonic content of the fuzz. Tubes all have sound profiles that provide vintage-type tube tone and highly pleasing distortion, emphasizing even-order harmonics. All tubes are available at The Tube Store. https://www.thetubestore.com . Experimental circuitry. Untested design. Build at own risk. Power-supply not shown. Requires a regulated single-polarity DC supply providing +12V @ 1A. Example: Triad WSU120-1000-R. DigiKey # 237-1456-ND. $8.45 each. Available at DigiKey. https://www.digikey.com . Rackmount implementation is recommended, with vibration damping on the mounts. And use pads on the tubes to help mitigate vibrational noise.