Booster w. Schottky-Fuzz & 7-Band Tone PUBLIC

Booster Circuit with Schottky-Fuzz and 7-Band Tone-Control

Booster circuit with Schottky-fuzz and 7-band tone-control. Capable of signal boost up to +45 dBV with all controls at 100%. Controls Include: Input Gain, Drive, Fuzz enable switch, Fuzz symmetry switches (two, with 2 settings each), Fuzz Depth, Tone-Controls (seven), Output Gain, and Volume. Range above 0 dBV with all controls at 50% is from 10 Hz to 6 kHz. Suitable for 6/7/8-string guitar or 4/5/6-string bass-guitar in standard tuning. The low 0 dBV reference is at 9.6 Hz with low -3 dB reference at 8.8 Hz. The high 0 dBV reference is at 6.3 kHz with high -3 dB reference at 10 kHz, while the 20 kHz audio limit is down from 0 dBV by -10 dBV. Maximum Gain = +21 dBV @ 300 Hz with all controls at 50%, or +45.2 dBV with all controls at 100%. The tone-controls provide an average +-3 dBV of adjustment each, regardless of the settings of other controls, though adjacent tone-controls slightly affect one another. The tone-control's approximate passband center-frequencies are; 12 kHz, 6 kHz, 3 kHz, 1 kHz, 400 Hz, 160 Hz, and 40 Hz. Fuzz is from Schottky diodes but can be enabled or disabled as desired, with either setting having no effect on gain (including the Fuzz Depth control). Symmetry switches set the harmonic content of the fuzz; symmetry between the two legs of the diode array gives emphasis on odd-order harmonics, for raspier fuzz, while assymetry gives more even-order harmonics, for a sweeter fuzz tone. Power-supply not shown. Requires a regulated dual-polarity supply providing +-9VDC or +-12VDC or +-15VDC at >= 15 mA of current. While circuit is simulator verified, treat as experimental. Breadboard test before committing to a soldered build.