Univox SuperFuzz (modded)

Here the Univox SuperFuzz with the mods done by FSB member derringer. It replaces the stock tone switch with a pot, as well as a few other useful mods. Socket the 2 ceramic caps going from the base to collector on Q1 and Q6 and try some different values (I'm guessing in the 100pf to 500pf range). This one's a little on the wide side, so you'd be hard pressed to fit it in a 1590B, but it should fit quite nicely in a 1590BB.

Mosrite Fuzzrite

Here another classic fuzz, the Mosrite Fuzzrite. This is the silicon version. The original transistors were marked "TZ82" so be sure to use sockets and try a few different ones out. The original pots were 350k and 33k, which are going to be difficult values to track down. You can either use 500k and 50k, or use 500k and 50k and add fixed resistors in parallel (between lugs 1 and 3) to try and recreate the original values. 

DOD Overdrive 250 Grey Spec

Here's the grey spec DOD Overdrive 250 that fits in a 1590a enclosure. You could also build a yellow spec 250 or the MXR Distortion + with this layout. Just compare the schematics and value swaps.

JFET Boost

Here's a quicky. It's an old Dragonfly design and was my first perf build.

Dirty Punk Repeater Delay

Here's another PT2399 delay by Allesz that might be worth trying out. 

Crap-Fi Delay

Here's a fairly simple PT2399 delay from Allesz over on FSB. Here's what he had to say about it:

It is a simple circuit and it works good but: the mix and repeats pot are a little interactive in quite a strange way (anyway they work different from a standard echo: to turn off the delay you don'use the mix pot, but you turn to zero the feedback pot) and the on off is a little bit noisy (the clip is recorded at low volume and you will hear kids (always noisy) and clicks so, mostly, the clicks are from the mechanical sound of the switch, but a little noise makes it to the amp too) in order to minimize the clicks the input is grounded on bypass.

The major differences between my schem and the others pt2399 projects I know are that I didn't use the opamp between pins 14 and 13 and I didn't put a cap between pin 2 and three (repeats sounded cleaner to me this way).

I put a small switch to select between long and short delay; the long delays are quite dirty.

Escobedo Octup!

Here's a clean octave up effect from Tim Escobedo. The Bias control offer subtle changes, which is why I have it as an external pot. He mentioned it might need a booster in front of it, just FYI.