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I got this up in the Wish List. Vote and cross your fingers!

Thanks! It's a laser-etched acrylic material. Same stuff used for a lot of amp faceplates. I bought a little desktop laser cutter and buy that material.

You can give it an upvote on the wish list.

PNP board verified. WooHoo! I got a few more NPN Ge from Smallbear in case I need to make a another couple of these.

Sweetness! Exciting stuff. Any chance you could explain how you're doing the programming for those of us less digitally inclined?

Any issues using a dual opamp, with the second half as the buffer replacing the mosfet emitter follower at the output?

What about ditching R14 and R13, using a 27K for R17 and a 5K trimmer for R18 with the wiper going to R15 for biasing?

Phase 90 to 91? Leaving us with a cliffhanger! Great article, Chuck!

It's just a personal project with a lot of SMD parts and pretty uncommon tubes - not at all suited for a DIY project.

Thanks, bud. I didn't realize the pics weren't clickable til you said something, so I got some bigger versions.

So I was fumbling around with using an opamp servo to bias JFETs and Chuck followed with a killer servo design for a Fuzz Face-style Germanium fuzz. In short, it's the absolute BALLS. Easily among the favorite fuzz boxes I've ever built - or played, for that matter. You can see the schematic and...

OMG, you're right. I forgot all about his flanger project.

Not yet. I've got 3 or 4 of them sitting my desk that I haven't gotten around to messing with.

Would a uC StompLFO work in there?

Suggestion: Take a pic of the guts, mirror it and use that for a decal on top. Damn that's pure hawtness.

The first thing to do is get a digital multimeter and measure the voltages on the pins of all the 8-legged chips and report them here.

I think I'm going to have to quit my job so I can keep up with building all the cool circuits you come up with, Chuck. Love everything about this one. That breadboard setup is super slick, too. Are the aluminum rails glued to the board? Don't see any screws.

$6 and Limit 3? Gotta up your game, Electric Goldmine. Imagine the sheer elegance of your Fuzz Face in one of these $1 salad bowls from the Dollar Store:

Say, Chuck, where would you buy components back in those days?

I probably watched that demo 20 times when you finished that thing. One of my all time favorite amp builds.