Single-Battery Preamp 1 PUBLIC

2-Stage guitar preamp powered by a single 9-volt battery,

2-stage guitar preamp powered by a single 9V battery. Controls Include: Input Attenuation enable switch (Attenuate or Direct), Attenuation control, Input Gain, Drive, Output Gain, Volume. No tone controls. Frequency Range 80 Hz to 12.5 kHz. Maximum Gain +25 dBV @ 500 Hz. For 6-string guitar in standard tuning. As is, this is a medium-gain circuit for signal boosting. For increasing Gain sufficient to use as an overdrive, raise values of both Gain pots to 250k each, resulting in possible Maximum Gain of +39 dBV.