Dan Armstrong Green Ringer

Here's a more unusual effect.  Playing chords it has a ring mod-ish quality to it, but played higher up the fretboard and using the neck pick up with tone control down gives a very prominent octave effect which sounds great.  You'll notice I shared holes for the diodes and a couple of the resistors, this was just to keep the final width down so it will comfortably fit in a 1590B box.  It should be easy enough to do unless you're using components with very thick leads.  The resistors I used are Dale metal film and are quite thick but I still managed it fine in my build.  I'd recommend socketing the transistors and diodes because you can get slightly different sounds by swapping them, Q2 is the transistor to experiment with and try germanium and silicon diodes to see which you prefer.

It is recommended that for the clearest octave effect you match the diodes as closely as possible for forward voltage, and some people have suggested that it is also worth matching the 47nF caps and the 10K and 22K resistors, although if you use 1% metal film they're probably going to be extremely close anyway. 

The layout is verified.

Merry Christmas and a Happy New Year to everyone!

Effector 13 / Devi Soda Meiser

Clark Gainster - compact version

Here's a version of the Clark Gainster for those who don't want to use the massive paper-in-oil caps in the version posted previously.  I only put in the large axial 100u cap because there was a bit of space in the bottom right of the layout and I had some that size.  You can obviously use a smaller radial cap here but there's no scope to further compact the layout because of the other components around it.  Still this will easily fit in a 1590B and so gives an option for a "Small Box" Gainster.

Geiri's demo vid of his supercool build:

 
Kit is the 3 knob version 

JFET Parallel Looper

This is one of those versatile builds that could be useful for a number of different tasks.  Effects and dry signal in parallel, 3 channel splitter/mixer, 1 input 3 outputs for using multiple amps, 3 inputs into one output to use multiple instruments, convert serial effects loop into parallel ... and so on.  I made it 3 channel so I could put two mono effects in parallel and then have the third channel to pass the dry signal via a patch lead if I was using digital effects and wanted them wet only, so as not to digitise the main dry signal.  It can be easily adapted for more or less channels depending on what would suit you.

Based on the AMZ splitter and a generic JFET mixer circuit.

Fuzz Face PNP negative ground with simple bipolar power supply

This one will let you continue to use the more consistent PNP germanium transistors, but the charge pump will provide a -9V supply, so the ground at 0V can be daisy chained with all your negative ground effects.  The same structure could be used with any circuit that is usually PNP like the Rangemaster or Tonebender.