Cornish SS-3 Soft Sustain

This just got traced by Aion and he was kind enough to share the schematic along with a cool tracing journal on his blog. As to what the SS-3 is, it's like a beefed up Cornish G-2, which is his take on the Distortion+. The original uses 2, single op amps, but for the sake of space and simplicity I've used a single dual op amp. It'll be tight, but it should fit in a 1590B. Like all Cornish pedals, it's designed with buffered bypass so the FSw labels on the layout refer to a DPDT footswitch. If wiring for true bypass, ignore those labels (and the 51k and 91Ω resistors at the bottom right corner of the board). But if you want to build it like the original, wire the in/out jacks to the in/out pads, one side of a DPDT footswitch to the FSw pads, and the other side for the on/off LED indicator.

Cornish P2 (probably)

For Fuzz Friday here's what most people think is the Cornish P2. It's a slightly modified Ram's Head Big Muff with flat mids and the Cornish buffer up front. If you want to use the Cornish bypass like the original check out the Cornish G2 layout for the bypass board.

Also, this will be the last layout of the year. Taking some time to rest up over the holidays. See you in the New Year and Happy Holidays everyone!

Cornish SS-2

With the G-2 fresh in our minds, I thought I'd draw up the SS-2 as well. This is set up for a 125B like the G-2 due to the footswitch board. The circuit itself is like an MXR Distortion + with a tone control and a gain recovery stage. Originals utilize 2, LM741 chips, but I've drawn it up for a LM1458 (which is a dual version of the 741) to make things a little easier and save space.

Cornish G-2

Happy Fuzz Friday, everyone! As promised, here's my layout for the Pete Cornish G-2. The circuit is essentially a Big Muff (with a few different component values) with a simplified tone stack and input buffers. It's not quite as fuzzy or distorted as a typical BMP but more of a heavy overdrive. Though it can get fuzzy at higher Sustain levels. There is a bit of uncertainty over the type of diodes used in the clipping stages, so socketing is a good idea here. 1N34s or 1N60s are a good place to start.

As I mentioned earlier this week, I've also laid out the bypass buffer with a board mounted footswitch. It's a little too wide for a 1590B, but this and main circuit layout will fit very nicely in a 125B enclosure. 

If you're building on perf and want to include the bypass buffer of the original you can use the Cornish Buffer layout and wire it like this:

Cornish Buffer

Got a request for the Pete Cornish Buffer in dual form like the one I did with the Klon Buffer. So here's both a single and a dual Cornish Buffer. The original uses a 1N5401 for polarity protection, but a 4001 or similar will work too. And you can probably get away with a small value on the power filter cap (220µ).