It has been mentioned that this may be a bit too low gain for some people, although there seemed to be plenty in the vid posted below, but if you want to give it a little more oomph then consider increasing the value of the Gain pot to taste. The original also uses an LT1054 charge pump IC but I have included the ICL7660S instead as it can be obtained more readily, cheaply and will perform the function of providing -9V perfectly well.
This pedal is currently unavailable, but Jack is a good guy in the DIY community and will always talk about his designs, even correcting schematics and posting his own. At $149.95 for an extremely well made pedal, consider supporting the builder with this or some of his other effects which also includes Mr Black Effects.
Info about the original:
Why do overdrive pedals sound and feel like overdrive pedals? I've struggled with this as long as I've played guitar, so I set out to solve this problem and I designed the Deuce Coupe-- a circuit that felt good, responded like an amp, and made me play things I hadn't before. Revving up clean boost, overdrive and even distortion was extremely satisfying and easy, but there was one last aspect missing: the ability to absolutely pummel the amp on the fly. And then came Ultra-Boost; the clean-up hitter.
Included are controls for Volume, Tone, and Gain, with an internal trim-pot for Ultra-Boost level.
Deuce Coupe consistently delivers, be the chips up or down, and it does it in spades.
-Light to medium overdrive
-Up to +56dB boost available to push tube amps
-18V internal operation for exceptional dynamic response
-+4 - +16 dB ultra boost