Single-Battery Preamp 3 PUBLIC

Guitar preamp powered by a single 9-volt battery, with 2-band tone, two Gain controls, and hard-clipping silicon-diode fuzz.

Guitar preamp powered by a single 9V battery. Controls Include: Input Attenuation enable switch (Attenuate or Direct), Attenuation control, Input Gain, Direct Send, Fuzz enable switch, Fuzz Drive, Fuzz Clip, Fuzz symmetry switches (two with 2 settings each), Fuzz Depth control, Bass, Treble, Output Gain, and Volume. Range is 20 Hz to 20 kHz. Maximum Gain +7.3 dBV @ 1.3 kHz with all controls at 50%. Maximum gain +16.7 dBV @ 5 kHz with all controls at 100%. Suitable for 6/7/8-string guitar and 4/5/6-string bass-guitar, with emphasis on mids between 500 Hz and 3.2 kHz. For more gain, allowing use as overdrive, increase Output Gain control, R26, up to 10M, but no larger. Do not alter other components except during breadboard testing, if needed or desired to change overall response.