Rhythm & Detonation

The 4 Horsemen of the Apocolypse, Rat.

This is a 4 knob rat featuring Albrecht Dürer's artwork from his woodcuts of the book of Revelation. The artwork is a cropped portion of The 4 Horsemen of the Apocalypse.

The circuit is a 4 knob rat distortion made with the LM308N opamp and 2x 1n914 clipping diodes. The 4th knob on a 4 knob rat replaces the 47 ohm resistor with a 500 ohm pot so you can adjust this part of the circuit. Fully counter-clockwise the rat gets very trebly and squeaky with huge upper harmonics and a propensity to feedback. Turned up about a quarter turn it is in the sweet spot of a stock rat, but as you turn it further clockwise the bass tightens up and gets less fizzed out and more punchy.

The pedal is housed in a horizontal hammond 1590BB enclosure is painted in Almond colored enamel. The knobs are black davies 1510 with a water clear red led.