Article is by Craig Anderton. Issue J of the sought after Small Stone. This is a compressor. The same one used in the sustain section of a Deluxe Big Muff. Circuit used to bring out clarity in sound.
Basic modulation uses transistors, has rate and depth controls.
Uses real tube, 12AU7A to be exact. Parts list and descriptive text. Produces an octaving effect. Similar to the Fuzzface. Vintage fuzz from the days of Paul Revere and the Raiders.