Fredric Effects Utility Perkolator 15th February 2009Beavis Audio site. As it turns out, very little needed to be changed and the margin of error for lots of components in this circuit is so big that I slotted in a GT313A and 2N3904 in place of the specified PNP germanium and NPN silicon transistors and the result is still discernably an HP, albiet slightly gainier and more unruly. The USSR parts used to make this effect also result in 15% more mojo arrows than a normal Harmonic Percolator. This is what I'm calling the Utility Perkolator.
L-R: Modified EA tremolo with pulsing blue LED and awesome tiki-style fabric finish, Utility Perkolator prototype (future ones will be khaki fabric), Green/white HP, Grumblier Wolf.