Clark Gainster

Here's a pretty simple drive that everyone says sounds amazing. Original units had mojo parts and point to point wiring. Should fit nicely in a 1590B.

Brunetti Taxi Drive

Here's a pretty interesting lower gain overdrive. There's a an opamp gain stage with soft clipping going into a JFET stage that pushes a modified BMP tone stack, followed by a BJT output buffer. One of the diodes in the opamp stage is unknown, so socket and experiment. I also took a few liberties from the original using a TL072 instead of a TL071 for layout purposes and using the second opamp to buffer the voltage reference. Should fit nicely in a 1590B. Schematic available on FSB.

Hornby Skewes Shatterbox

Got a request for this one for Fuzz Friday. Fairly simple fuzz + boost box. Originals used PNP silicon transistors, but you can use NPNs just as well. The perf side below reflects the original's positive ground and the etch side shows daisy-chain-able negative ground. If you want to put 2 footswitches in a 1590B you could, as the board is small enough for that. Schematic on FSB.

Steel Panther Pu55y M3lt3r

I've held off in laying this one out just for the name alone (it was banned from Reverb for this very reason), but the circuit is fairly interesting so it was time. It features a MOSFET buffer into a pretty standard opamp gain stage with LED clipping into a MOSFET gain stage. Schematic and discussion over on FSB. I took a few liberties with the power section simplify it and make it all fit in a 1590B.

BK Butler Tube Driver

Apparently it's tube week. Here's the Tube Driver made famous by David Gilmour. It uses a 12AX7 which is pushed by a dual opamp followed by a Fender-style tone stack. I kept the power section from John K's version of the Blue Tube. Fits easily in a 1590BB. Here's the schematic for reference.

Tube Works Blue Tube

Came across John K's vero of this circuit with a few mods (Mid pot, bipolar charge pump) and figured we needed a layout for it as well. Runs on 9-12v. Pots are all board mounted with the tube off board. Here's John's original layout.

Fulltone Ultimate Octave

Happy Fuzz Friday everyone! Had a request for this one. It's basically a Foxx Tone Machine with some value changes and a couple additions, namely a switch to shift the range of the tone control and the octave switch is a footswitch. Here's the schematic for reference.

DOD FX91 Bass Overdrive

Always need more bass effects, right? This was one of the first bass ODs to have a clean blend. Should be an easy fit in a 1590B. Here's the schematic for reference.