Play Tested: All controls function as they should without any scratchy noises.
From Fantail Audio:
Originally released in 1978, the Rat was designed by Scott Burnham and Steve Kiraly, who at the time, were repairing and modifying existing distortion pedals for ProCo Sound based in Kalamazoo, Michigan.
Not satisfied with what was already on the market, they decided that they themselves could design a far superior product; which, of course, become the very first version of the Rat.
The Rat is a relatively simple design, utilising a variable gain stage powered by a single op-amp with a pair of diodes clipping the waveform at the output in order to create the distortion. This is followed by a passive tone control (a variable low pass filter), and finally, a JFET buffer to ensure signal integrity.
