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I posted this in the workbench thread, and a few people wanted me to walkthrough my "super magic magic secrets to how I made this preamp and how I'm going to make more. Disclaimer: HIGH VOLTAGES HURT AND CAN KILL YOU. BE SAFE, YA GOOBERS. A few caveats: 1. I had access to 1U rack enclosures...

You know when you think something is going to look great after imagining what it could look like and then it's disappointing? That's this. Thanks JB weld!

Honestly, don't know. Flying leads, solid grounding, shielded cable, and grid stoppers?

Welcome. Let's see what we can figure out. We know that you have good voltage from the smps -- 250v. Good start so far. What will help is if you can SAFELY measure the pins of the tube. I'm not sure on the layout which is which, but we should see this: Pins 1 and 6: tube plates, probably...

It lives! It doesn't squeal, whine, or hum! 3+ days off and on over these snow days (education has plusses and minuses) and finally sussed it out. Sushibox SmPS for plates (220, which is lower but fine) and a separate 12vdc supply for filaments and the Arduino for switching and LCD screen 3...

You're convincing me more and more to order the board and LFO chips from ElectricDruid. Weird is good.

True, but I like the sloped look. Breaks up the Hammond monotony. :)

I meant 3 to 4 foot switches. Sorry for the 3/4 -- that's how I write 3 or 4 in my notes.

Where did you get the enclosure? I'm looking for something for a 3/4 button foot switch. Thanks.

Just curious if there is a project similar to the Zoom Pd-01. Not that I don't like mine: but maybe there's something similar in a bit smaller form or that I can tweak a bit. Thanks for the response.

Very cool and useful. Now I don't have to go digging into the bowels of the internet for the calculator (was it Analog Alchemy?). I used another one for a Ge/Si switchable one I have, which I need to go back and fix. :)

I got mine working with two separate boards, two separate on/off stomps, a six way toggle for clipping for the tube screamer, and series/parallel. BUT, the series/parallel works, cuts the gain, but isn't super blendable and oscillates in one setting - so if you can figure that out better than...

Groovy