May I?

Got a request for this one. Another AC30/Rangemaster emulator to try and get Brian May's tone. Here's the schematic for reference. It calls for "BC245/256" JFETs for Q3-4, but I think that's a typo and should have the BF prefix. Should work with other JFETs as well. So socket and experiment with the usuals—J201, 2N5457, etc.

Korg DST-1/Yamaha DI-01 Distortion

I stumbled across the schematic for this effect and thought it was another variation of the Marshall Bluesbreaker circuit. But realized it actually predates the Marshall circuit by several years. Korg made a re-labeled version for Yamaha, the DI-01, and both still fetch decent prices. Apparently they were built like tanks. Sounds pretty decent too. Not sure what clipping diodes were used, but 1N4148s are probably a good place to start. Easy fit in a 1590B.

Pink Jimi Photon 'Weetie Pi

Here's a really cool and versatile dirt pedal design by Pink Jimi Photon. He's made a lot of contributions to the DIY community and whips up some cool stuff. Check this thread on FSB for the schematic and Jimi's description of the circuit.

BJF Bone Bender

Happy Fuzz Friday! As requested, here's Bjorn's Bone Bender. Lots of great info and schematic in this doc. Should fit nicely in a 1590B.

Menatone Ms. Foxy Brown

Another Marshall-in-a-box, the Ms. Foxy Brown uses 3 J201s and feels a lot like an older Run Off Groove design (though it's not). As per usual, you'll need to bias the J201s to about 4.5v and then fine tune as needed. Should fit easily in a 1590B. Schematic for reference.

Square Wave Oscillator

Came across this Instructable the other day and thought it would be a good addition to the library. Would be a good first step into the synth world and apparently plays nice with guitar pedals. Already built it myself and it works great, and fits nicely in a 1590G.

 

Lovepedal Zendrive 2

The Zendrive 2 is a big box version of the Zendrive, using a 12AX7 internally. Sadly the tube is only being used for clipping, replacing the BAT41 and 1N34a diodes in the small box Zendrive. But according to reliable sources, it sound very good, with some harmonic mojo happening. Other than the tube clipping, there's only a few value changes from the small box version. Schematic for reference.