Barcus-Berry 3000A

Stumbled across this schematic on FSB. It's a buffer/EQ/preamp for peizo pickups, specifically all Barcus-Berry electret microphone systems. I figured most would be building this into an instrument and not a pedal, so all the pots are off-board. If you're planning on running it only off a 9v battery, you cab get away without the power filter cap (47uF) or the polarity protection diode (1N4001).