Klon Centaur - True Bypass

Here's the Klon again. I wanted one with board mounted pots and for a smaller enclosure. You might be able to fit this in a 1590B with low profile jacks, but it will easily fit in a 125B. It's designed for 9mm PCB mount pots, though it might be difficult to find the dual-gang Gain pot. Look for Alpha part number RD902F-40-00. I've removed a few components that were apart of the stock bypass switching for the sake of space, so you'll want to use your true bypass method of choice with this one.

Dual Klon Buffer

In an effort to make my own personal pedal board better, I'm building buffers at the input and output of my signal chain. As space and DC jacks are always a premium, I thought to build a dual buffer in a 1590A enclosure. The Klon Buffer is great and since it only uses half of a TL072, I figured I could just use the other half for the second buffer. It's a little tight depending on the jacks you use, but the board is small enough to mount vertically to an inside wall of a 1590A while the wall opposite can mount the 4 input/output jacks. Here's my drilling template to better illustrate.

And here are a few pics of my build.

Klon Centaur - Bare Bones

This layout is the legendary Klon Centaur, but without the charge pump. The charge pump is present in the original to keep the 2nd opamp from clipping. But since there are diodes before signal even reaches that IC, it may not matter. Check out this thread on FSB for more info and schematic. Without the charge pump, the circuit was much easier to layout for a smaller footprint. Still a fairly large board, but should still fit in a 1590B.

Klon Centaur

Don't want to spend two grand on an original? Yeah, me neither. Regarded as one of the best overdrives of all time, the Klon Centaur seems to be something that every guitarist wants on their board. This one's not going to fit in a 1590B (if you want that, check out Madbean's Kingslayer), but you might have enough room in a 125B if you turn the board sideways. This layout follows the original Centaur with buffered bypass (using a DPDT footswitch). If you want to wire it for true bypass, ignore the footswitch wiring pads, and eliminate the 4.7µ cap, 560Ω and 100k resistors on the lower right side of the board near the input. Schematic and more info can be found here.

UPDATE:

For those confused by the footswitch wiring for non-true bypass, here's a wiring diagram for reference.

Klon Buffer

Who doesn't love a Klon, right? Here's the buffer stage of the Centaur. The original Klon uses one side of a TL072 for the buffer and the other for gain stage. If you're building the just the buffer, you can get away with a TL071. I've laid out a perf and PCB for each.