Colorsound Overdriver
From S.Castledine's site
The Overdriver was introduced in the early '70s. I believe it was originally sold under the name "Power Boost". This pedal has been rereleased by Macaris, who manufactured the original Sola Sound and Colorsound effects. Prescription Electronics also sell a copy, which they call the Rx Overdriver. There is a sound sample on their site.
The original Overdriver didn't have a volume control, so the output level was determined purely by the gain control. The reissues have a volume control as well, so I included one on my version. Up to a point, this circuit acts as a clean boost, but adds an edgy distortion when pushed.
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Built by slacker
