Guyatone PS-021 Guitar Exciter / Compressor

A vintage pedal from the 80s.
I've removed the flip flop switching system and buffers (thanks Zach for the help).
Hopefully it will fit in a 125B box.
You can find original thread and schematic here.
Updated schematic is available in our Forum section. 
Thanks Dino for his explanatory video.
12/11 Layout Updated! Readded the input buffer as Aion's suggested.

... and the LM13700 version

Vox/Guyatone Zoom Distortion Box

This design is pretty close to OD250/Dist+, but i thought it should be added anyway, as there are some slight differences. Funny thing is that the same circuit was marketed and sold as both Vox Distortion and Guyatone Zoom Distortion Box. From what i can tell from the demo, it's really nice sounding thing. These both also seem to be pretty rare items with hefty price tags - if you can find one.

In my experience with 250 and Dist+, the pots may give better control with linear instead of original log taper.