Split-Supply Preamp 5 PUBLIC

Split-Supply Guitar Preamp with 3-Band Tone and Clean Boost

Split-supply guitar preamp with 3-band Fender-style tone-stack, Clean Boost, and auxiliary buffered output in addition to a normal output. Controls Include: Input Attenuation enable switch (Attenuate or Direct), Attenuation control, Boost enable switch, Boost Gain, Boost Tone, Boost Level, Drive, Bass, Mid, Treble, Stack-Sum, and Volume. No-Boost Range 30 Hz to 25 kHz, with emphasis on mids and highs. With-Boost Range 20 Hz to > 25 kHz. Suitable for 6/7/8-string electric guitar or 4/5/6-string bass. Maximum No-Boost Gain = +21 dBV @ 250 Hz with all controls at 50%. Maximum Boost Gain = +41 dBV @ 250 Hz with all controls at 50%. The circuit can be for stomp-box or rackmount applications. The batteries can be replaced by a regulated dual-polarity DC supply providing +-9VDC or +-12VDC or +-15VDC at >= 40 mA of current. And though simulator verified, treat the circuit as experimental. Breadboard test it before soldering.