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Please don't interpret any of this as a substitute for real regulatory or legal advice, but here's my $0.02. RoHS is trivially easy to self-declare. If every part you source has a document that says its RoHS, you're fine. If you want to be extra careful, you can retain your own copies for each...

It certainly wasn’t four years of continuous work. I wasn’t even involved for much of that time. 🤷🏼‍♂️ Matt Hoopes, owner of 1981 inventions.

Kind of a necrobump but I recently came across this thread. Since this was my design I figured I'd chime in. The input buffer convergently ends up resmbling the Cornish buffer, though this circuit topology was not invented by Cornish. You see bootstrapping in a wide variety of high impedance...

Here's what it should look like on an analyzer at both extremes of the Bass control, all other tone controls at noon. The FMV doesn't have a whole lot of bass range, especially the way it's tuned, but that's the Model T for you. You can see why a lot of "amp in a box" pedals graft active...