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Ha! Yeah, it probably would've been slightly more rewarding to finally get my first Klon clone or something like that working, but honestly, one of the reasons I ordered the Butt Head was because I'd read so many articles and watched so many videos about what a bizarre pedal the original Grunge...

PS--While I'm still interested in hearing any thoughts about the noisiness, my own research suggests this pedal is functioning as expected. The weird squeal went away once I fully assembled everything, and the noise, while still considerable, seems a bit more manageable now with some careful...

Okay, so it took a bit longer than I expected to get back to the work bench, but I've got some good news and some additional questions. First, though, here are a few answers I promised (in case anyone finds this thread down the road and wants to follow the bread crumbs): IC1 voltages are as...

I was originally going to go with red, but my wife said that Toothless's eyes are green, so the knobs should be green. As usual, she's the one who's correct!

You are definitely not wrong! :ROFLMAO:

So my third or fourth pedal build was a Stewmac Two Kings KoT clone build, and I loved everything about how it turned out. I've never played an actual KoT, but the clone sounded so good. Based on my daughter's love of How to Train Your Dragon, I decided to do a fun riff on the original KoT...

So I'm probably still a day or two away from finding some workbench time to get answers to the specific troubleshooting suggestions and questions some of you have offered, but I've got a lull at work at the moment, so I wanted to respond to a few questions/comments that don't require me to have...

This is really helpful! It might be a day or two at this point before I can get back to the workbench, but I'll start by working through your suggestions here and post some results soon.

No worries! I'm definitely aware that this thread is getting out of hand. :) But yeah, I've rechecked all of the resistor values and cap values, and I've also tested all of the ones that can be tested while soldered to the board. If there's an issue with a component at this point, it's a problem...

Another update in addition to my last two response posts: I spent the last few hours at the workbench with two goals: first, to explore what might be going on around C8 and IC1.1, and, second, to probe the full audio path. On the first front, I started by reflowing C8, but that didn't change...

Yep, both legs of R10 have strong tone. C7 has no tone, but R11 has tone on one side. I'm not sure what that info would show, but that's what I found.

I did reflow everything after posting the pic, so that doesn't seem to be the issue as far as I can tell...

Update: I reflowed the solder on the J201 and I'm getting tone from legs 2 and 3 now, as well as tone through C3 and legs 1, 2, and 3 on IC2.1. The tone on leg 1 of IC2.1 is much louder than the previous test points, which I assume means IC2.1 is doing its job. I'm getting good tone from R10 as...

I had swapped them temporarily last week to see if it made a difference, but I put them back when it didn't. They're currently in the correct place according to the silk screening on the PCB itself.

Finally some possible progress! I started working through the circuit following the image @Feral Feline posted, and I got as far as the J201 transistor before hitting an issue. I don't know if it's THE issue, but I got tone through R2 and C2, but when I touch the probe to any of the three leads...

Both posts are helpful! Honestly, I have no idea how people figured this stuff out before internet forums existed. At least not in any timely fashion!

Thanks for the info! So, just to double-check, I can feed a random tone generator signal from my phone into the pedal for testing with the audio probe?

I really appreciate the thorough once-over! I'll double-check all of these when I get home this evening!

So I'm going to put together a down-and-dirty audio probe over the next few days, hopefully, to try to pinpoint where the issue is with this pedal. Two quick questions: first, can anyone point to a good "audio probing an effects pedal for dummies" resource? I did a search in the forum, but...

Many thanks!