OKKO
OKKO Diablo Boost+ version
Several versions has been made of this great sounding overdrive and this version is called “Boost+.The layout is based on the schematic at FSB but I took the liberty to do some changes that could be useful. First, the J FETs remains to be unknown so I added a Bias trimpot to be able to … Read more
OKKO Diablo+
The Diablo is a modified BSIAB circuit and the Diablo+ version has an added boost at the output that’s independent from the main overdrive circuit. I’ve laid it out for a 125B with top mounted jacks for a nice small footprint. Originals have a switch to run at 9 or 18 volts which I’ve left … Read more
OKKO Dominator
Here’s a big one, and just so happens to be the 700th layout on the blog 😎—the OKKO Dominator distortion. It’s a couple of JFETs pushing an opamp with active EQ, with a charge pump. Originals use a switch to select the range of the mids control, but it’s easy to swap out for a … Read more
OKKO Dominator
Modded slightly to include a Mid Range pot instead of the switch in the original to give you complete variable control of the mids frequency rather than just 3 preset values. I’ve done the charge pump on a separate board in an attempt to keep it 1590B friendly by allowing you to tuck the charge … Read more
OKKO Diablo – Modded Monster Pot Edition
Request. A modded version of the Okko Diablo with pots replacing the onboard trimmers and scope for even more! This will give you an 8 knob version of the Diablo with the Presence and Bass controls external. If you’re feeling particularly brave you could even replace the trimmers on the booster to make an 11 … Read more