Zvex Fuzzolo

The Fuzzolo is one of the newer Zvex designs in a 1590a box. It's a stripped down Woolly Mammoth with a SHO added to the end, so it's got a huge fuzz sound. In production versions, there's a moveable jumper internally to go between active and passive pickups. You could use a SPDT switch to accomplish this, and make it easier to switch between the 2 modes, or you could eliminate the 2 input resistors (750Ω and 39k) and use a 50k pot as a pre-gain control. The PW (pulse width) pot pans between a square wave and a wide/narrow pulse width. Like the original, this should fit nicely in a 1590a enclosure.

One-Knob Fat Fuzz

Here's another quicky for your weekend. This is based on Tim Escobedo's LoFoMoFo, but tweaked for more bass frequencies. This circuit was actually my first build and it sounds great. Although, I made the n00b mistake of using a 10n cap on the input instead of the 100n because I misread the capacitor code. So I guess I should say it sounds good with a 10n input cap. Can't really speak to the stock sound, but it's apparently very fat. Should fit easily in a 1590a.

Crowther Audio Prunes & Custard

The Crowther Prunes & Custard is a unique distortion box good for both guitar and bass. It's a two-stage circuit, built around a TL072 dual-opamp. The first stage acts as a preamp, and the second stage generates the distortion, with harmonic overtones. I've laid this out for on board pots (long leg PCB-mount pots will probably work best mounted from the component side) and it should fit nicely in a 1590B enclosure. The 2 switches are SPST.

Devi Ever Torn's Peaker

The Devi Ever Torn's Peaker is a versatile dirt box, ranging from smooth and crunchy at low gain settings, to thick distortion/fuzz tones as the texture control is increased. The Torn's Peaker is very close to a couple other Devi circuits (Aenima, US, and Never Drive) and it only takes a few modifications to get the Torn's Peaker to the other circuit specs. Here's the schematic from Freestompboxes.org showing the differences between the 4 circuits, and the modifications are listed in the layout image below.

Ersatz Verben

The Ersatz Verben is a pseudo-reverb circuit using a PT2399 for short slapback delay. It was designed by FSB member CultureJam and refined by EarthTones, and based on the Crap-Fi Delay by Allesz. Delay time ranges from 40-140ms. I've laid it out for onboard pots and added polarity protection and an onboard LED resistor. Here's a demo:

Vemuram Jan Ray

Got a request for this one. It's another Timmy knockoff with a couple extra low value caps and a weird resistor array leading to the Bass control.

JHS Superbolt

Here's a popular JHS pedal that emulates old Supro/Valco amps: the Superbolt. It has a remarkable similarity to the Run Off Groove Supreaux and Supreaux Deux. It seems to be a slightly modded Supreaux, with the high/low switch and 18 volt supply of the Supreaux Deux. A charge pump is also added so the pedal can run off a typical 9v supply. You can use an ICL7660 or MAX1044 in place of the LT1054 (though, if you use the MAX1044, be sure to ground pin 5). This one's laid out for on board pots as well as the SPDT switch. Be sure to bias the JFETs to around 9v, then adjust to taste.