This circuit was found in the September 1999 issue of Electronics Now magazine. The circuit is based on common operational circuits and produces various effects for the sound of guitars.
This circuit is from a 1969 General Electric manual. The SCR may be the TIC106. Similar circuits...
This circuit was found in a January 1981 Radio Electronics magazine. The transistors are the well...
We found this circuit in a 1991 publication. It is intended for low-impedance microphones,...