Jon Patton's Blue Warbler

Continuing Jon Patton Week with a vibe/tremolo effect called the Blue Warbler. It features envelop control over the LFO and can be built with one or two LDR stages (layout below reflects the 2 stage version). Jon explains it best, so be sure to check out his build doc and demo below. It'll be a little tight in a 1590B because of the way the pots are board mounted, but should be doable.

Jon Patton's Clipper Ship

Jon has contributed a lot to the DIY pedal building community and I always learn something new when I layout one of his circuits. So I think we'll have a Jon Patton week, starting with the Clipper Ship. There's a good bit of flexibility with this one. Q1 can be pretty much any low gain transistor, germanium or silicon. If you're using a germanium transistor, use a germanium diode for D2 (if you're using a silicon transistor, omit D2). For D3-4 use anything with a low clipping threshold–1N60, 1N34, BAT41, etc. Q2-3 form a cascaded JFET stage (much like the AMZ Mini-Booster and a ton of other designs). Way more info on the circuit can be found here, including the schematic. I've laid it out for a typical 1590B with board mounted pots.

Oh, and D1 is a 1N5817 or similar for power protection. 

Keeler Kick

For Fuzz Friday we have another Keeler design. Nothing too complicated about it (and in my experience with fuzz simpler is better)–basically an Electra running into a Big Muff tone stack, into some germanium clipping, into a Fuzz Face. Schematic from FSB.

DeadAstronaut Chasm Reverb

Been a while since I did a reverb layout and this DeadAstronaut design does not disappoint. It's not a true-bypass effect, but uses some JFET switching so that tails are present when you turn the effect off. Coda Effects actually has a really good write up on the design. Ended up doing this one in Eagle and was able to squeeze it into a 125B. If you want a fabricated board, you can order some off OshPark.

Here's the build doc with the BOM, schematic, and drill template.

JHS Twin Twelve V1

Here's the original Twin Twelve from JHS. It's an emulator of the old Silvertone 1484 amp. Like a lot of amp emulators (including their Superbolt) it uses JFETs and an 18v charge pump. The schematic can be found here, and I added the charge pump from JHS's Superbolt. Set the trimmers to around 9v and the adjust as need be. Pots are board mounted as usual and it should fit in a 125B with top mounted jacks nicely.

Greaser Fuzz

Here's a cool little fuzz designed by Nocentelli over of FSB. It's based on the D*A*M GB-83, which is a silicon adaptation of the Tone Bender Mk. III (sans the tone control). Definitely worth building up. Here's the schematic for reference (you'll have to login to FSB to access).

Earthquaker Devices Chrysalis

Another oldie but goodie from EQD. The Chrysalis (now discontinued) is essentially a Speaker Cranker (with a pre-gain control instead of its normal gain control) into a Rat-style tone control, followed by a LPB-1 for gain recovery. Schematic can be found on FSB.