I'm searching for a schematic/layout for a *transparent boost-only circuit based around an op-amp. I tried a of couple transistors-based circuits, but they weren't performing as I was expecting. The last build had its guts ripped out and is now a passive attenuator with a 500k ohm pot, dimming LEDs and 3PDT wiring -- love it for guitar. I've got packs of TL0XX op-amps sitting around, so if I can chuck one on a board, that'd be swell. Know of any? I've searched around, but didn't find what I was looking for. *as transparent as possible.