Information
Nils Olof Carlin
I only made two or three of those (that I can recall!) and I still have one. It gives a rather weird effect - you could connect two instruments to get the "multiplied" output, or just connect one, to get the "square" of the signal - a kind of frequency-doubling.
Video
(2014-06-30) Carlin Ringmod with mods by Parasit Studio

