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A 3D printed custom standoff would be one solution here... Easy to design with even the most basic CAD tool. Together with 2 pieces of double-stick tape, you're set.

This is a really old (2012) version of this Madbean PCB design, I don't even see the pdf for this version on Madbeans site (it has the 2019 design). You could make it easier for others to help you by either posting the pdf for this pedal, or equivalently show screenshots of the (1) PCB w/ part...

Right, e.g., search for "NKT275" or "NKT275 alternatives". You'll find several useful threads like this one: https://forum.pedalpcb.com/threads/ac176-nkt275-alternatives.24176/#post-306946 Exploring w/ the search engine will help you get more out of this great forum.

It's also an awesome PCB name... You could save it for a pedal clone from someone you/we dislike!

https://forum.pedalpcb.com/threads/low-tide-schematic.19436/post-239876

Then you may have to search European or Asian vendors. e.g., https://www.banzaimusic.com/9mm-dome-washer-for-audio-jacks.html (email them to confirm the thread specs)

Here's a 3/8-32 dress nut https://www.amplifiedparts.com/products/nut-switchcraft-dress-nut-sealing-nut-32-unef-2a

According to this datasheet, Switchcraft 1/4" phone jacks use a 3/8"-32 thread https://www.mouser.com/datasheet/2/393/110x_m110x_series_cd-2942927.pdf And you're right that the Lumberg KLBM uses an M9x0.75 thread https://www.taydaelectronics.com/datasheets/files/A-3577.pdf

There are good high-temperature anti-seize products out there, and I use them on my iron and have no issues. I bought a tube eons ago, and it lasts a lifetime. This is just the result from a quick search, it's way more than you need - I include it only to note that stuff like this exists...

Sure, please do, that's why I posted it!

@redclover7! - Just wait until you get to SMT/SMD devices & opamps - SOD vs SOT, SOIC vs VSSOP, etc, etc. Plenty of opportunities to f*** up there on sizes and dimensions as well. Yes, guilty as charged...

@PedalBuilder - thanks! Also @Chuck D. Bones keeps a fair sized diode data collection

OK, the SiGe diodes arrived, so here's the data taken by my Peak DCA-75. I show 2 plots: 1. I(ma) vs V(V) on a linear plot 2. I(ma) vs V(V) on a semilog plot Plus I attach the raw data as a text file, for folks that might want to plot it themselves or add it to their own data collection. Cheers!

And as @Mentaltossflycoon notes, we've all done this (hopefully just once...), so welcome to the club! The old 'live and learn' adage applies here.

You want a 5mm lead spacing, and a voltage rating of ≥25V for a 9V pedal, and maybe ≥35-50V for an 18V pedal. Odds are that giant cap is rated for high voltage (say 100s of V) and/or high capacitance (say >1µF) - both factors increase the size. Note added: I usually get film caps with voltage...

Wow, so J201 is definitely legit and trimpot is correct. Very strange then - I've got a Caboose PCB waiting on my workbench, I'll try to go to work on it in a few days and see what happens to mine.

Just curious - hence 2 questions: 1. You're sure that your Bias trimpot is 50K, and not something smaller? 2. Is your J201 from a quality vendor (PPCB, Mouser, Digikey, Stompbox Parts, etc), or is it from something like Amazon/eBay? I.e., any chance it is something different (aka, a 'fake')?

Definitely! E.g., Analog Devices's LTspice is 100% free and pretty easy to use (the GUI can be a bit painful/awkward at first putting down & connecting the components, but you get used to it pretty quickly). But it's very well documented, and they continue to regularly issuing software updates...

Another SiGe diode from Nexperia is the PMEG200G20ELRX, similar characteristics but 2 amp diode. When my PMEG150G10ELRX diodes arrive, I'll try to remember to measure them and post the I-V curves here.

FYI - I ran across a silicon-germanium (SiGe) SMD diode from Nexperia, whose forward voltage is similar to a higher Vf germanium diode - which looks like what you'd want in a Cornish G-2, etc. And it's reverse characteristics are excellent, it only conducts ~50pA at 25V reverse bias (i.e...