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I had mentioned those previously. I’d rather find the culprit. Seems to me, if I had built a handful of these successfully prior to the five, with the same batch of components (not to mention dozens of other pedals) it should be something we could narrow down. It doesn’t make sense to me why...

At this point, I’m open to any further suggestions. This is really a weird one. Dozens of pedals built between these five, all with the same component batches -not a hint of a pop on any of them. Not to mention the few successful SB’s I built before these 5. Although, those were purchased...

Oh, it’s definitely related to the LED. Problem is, doesn’t matter which color or brand. Not too mention the same LED’s, as well as other components/switches/jacks etc have been used in numerous other builds without issue.

Whelp, I ordered two more of these. Now I have five Skeptical Buffers that pop when activated…. I don’t get it. I must’ve built a few dozen pedals between them without issue, not to mention the plethora of others before. I’ve built a handful of Skeptical Buffers, that didn’t pop, before...

I actually received my order! Had a couple extra pcbs as well. For anyone considering Moonn, he does have great stuff and while it may take a while, I think it’s worth the wait. Just plan on the delivery taking a month or two, if it comes earlier, that’s a plus. They always eventually arrive.

You ever get your order delivered? Man, I don’t know what’s going on with that dude. Sent him a couple messages and nothing. Mine never showed up.

Awesome! If only he’d ship my order from early April! I’ve tried messaging him a couple times to no avail. Too bad, he had some neat designs. Edit: Just got a message that the order was shipped! Glad everything seems to be ok with him. Edit again: still hasn’t shown up….. no answers to...

Heads up: https://www.amplifiedparts.com/products/transistor-2n169-germanium-oval-case-npn

Very cool! Do we know what the FETs are?

Oh my lord! I didn’t even notice the pedal at first! Nice job 😂

Yeah, this is at least a few years old, but only found mention of it on this post. Surprised EL hasn’t caught it yet. I was going to do him a courtesy and send a message, but they don’t have any info outside of social media and the PedalPCB forums is about as social as I get online. :) While...

Just built a couple of these and had the same issue of the Balance knob acting as a 2nd volume knob, turning both fuzz and clean up going CW and down going CCW. Comparing the EL schematic with the GGG schematic, it looks like the EL balance knob is traced wrong. The GGG one is correct. On the...

Yeah, the others I built all had 10R there with no issue. It does. The Harmonics and Bright make it a lot worse. The other, not nearly as bad, if any difference. Although, it does it when all three toggles are removed as well.

I’ll give it a shot. I did use a couple TL072’s, and definitely have used others (in other builds) from this same batch I got from Mouser, but it’s worth a try. I’ll let you know.

Thats a great suggestion, thank you! Although, the one I’m testing is out of the enclosure and the other handful of these I built have the same wire route, without issue. Perhaps I’ll use shielded wire, just to give it a shot. Thanks again!

Update, tried 1M, 100k and 10k in place of the 3M3’s on input and output. Once again, the output side didn’t change much. With a 10k in the input side, the pop noticeably decreased. Although, it also introduced a bit of noise when the circuit was activated. I’ve built a handful of other...

Tried replacing the 3M3 resistor on output to 100k, still have loud pop. Tonight I’ll try the same on the 3M3 at input

Yeah, I’ve built a couple before with no issues, using the same batch of parts. I’ll try the 100k in place of the 3M3 on bottom right of pcb. The cap is a 100v 3pf. I thought that may be an issue as well and put a 10pf Mlcc just to check. Still a pop. Thank you for your help with this.

Yup. Correct polarity for the tantalum’s. The blue caps are part of a batch of 500. They’re Nichicon UKT’s from Mouser. I’ve used approx 200 of them on other builds without issue. They’re audio grade and read less than 1 ohm ESR. One on of the skeptical buffers, I pulled all the...

The pulldown resistor added to the 3pdt on the input side did help the pop, but it also sucked the life out of the pedal…. So that’s not an option. Here is a picture of the back of one of the pcbs. I don’t see any cold solder joints, nor any debris that could cause an issue. Anyone else?