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Is there a typical spot in a PT2399 delay circuit responsible for the number of repeats? I built a Madbean Degenerator and everything works perfectly, except the feedback pot is unresponsive, only producing one repeat regardless of position. I tried replacing the pot, the PT2399 chip and...

Has anyone successfully done a Tayda UV print over one of their hammered enclosures? I'm thinking about trying it, but I'm worried that text over an uneven surface won't look right.

I'm working on the Fornicus and I'm a little confused by the LED configuration. On the PCB, there are three spots for LEDs, each unlabeled. In the doc, D1 is yellow, D2 is red, and I assume the third LED on the PCB is the bypass LED. From looking at the schematic, I believe the yellow is the...

This is probably something I should know by now, but I've never built a 2-in-1 and I'm having a hard time describing what I want in a search. How do I wire a footswitchable pre-boost? That is, I have two PCBs, a boost going into an OD, and I want one master footswitch that bypasses both, plus...

I’ve always wanted to build a Durham Crazy Horse, so after some googling I stumbled across Jed’s Peds, a U.K.-based seller that has the PCB, plus a few other rarities I’ve been looking for. My experience with them was not so great. From good to bad: Nu Glazer (Shoegazer) It works fine. No...

This is supposed to be a blackface-in-a-box, but I went with the much cooler silverface aesthetic. And instead of a Princeton or Harvard Reverb, I named it after a superior university. The finish is Tayda’s chromium. I bought one previously that arrived chipped out of the box (and got a...

I'm adding a dry-chorus-vibrato blend to a MBP Touchstone (EHX Small Clone). If you take out the 22K resistor, it turns into a vibrato, so I'm putting a pot in its place for the best of both worlds. With an A100K pot I'm getting a nice taper - vibrato fully clockwise, chorus at noon, and fully...

I just finished my last build from the stack of PCBGMs I bought on sale a while ago, and looking back, I built a lot more of them than I realized. I would advise against ordering from there if you can, but if you happen to already own some of their PCBs, this might help you decide what is worth...

I'm getting a high pitched whistle from this build, which increases with the treble and gain controls. I'd expect some noise from a high gain fuzz, but not like this. I thought maybe it was a bad opamp, but I tried six different JRC4558s and then a couple TL072s with no avail. Anyone else...

I built the XC Phase and it does a phased sound, but it's "fixed" and doesn't modulate, despite my attempts at biasing. I have the revision 2 board and I'm using a matched 2N5952 set from GPCB. I'm thinking maybe they are installed backwards, even though they match the orientation depicted on...

I just finished the Duocast, a.k.a. the copyright-infringing EHX Golden Nugget, which I named after the finest pancake house in the greater Chicago area. It is the latest installation in my “counterfeit” series. Like a pancake, this pedal falls flat. It’s a bit generic sounding, and the saggy...

Does the wattage of a zener diode matter for the purpose of building pedals? For example, if a build calls for a 9.1V 1/2W zener, is a 9.1V 1W an acceptable substitute? I am building the Narcissus, which calls for three of them, and from my limited knowledge it looks like they might be...

I have a couple socketed transistors that are loose and keep popping out. I don't really need to swap them anymore, so will it work if I solder them directly into the metal holes of the sockets? If anyone has tried this, is it a lasting solution that will keep them in place for good, or should...

Here’s another one I never got around to posting: the Son of Ben, complete with Fallout graphics and nuclear blast damage. In past J201 builds I had more success biasing by ear instead of a multimeter. I tried that here and was not impressed, so I used the technique in this thread and it sounds...

Last week I was browsing Craigslist and came across this oddity. The guy wanted $40 for it, but I haggled him down to $25. I didn’t know much about the pedal, but it turns out the MXR Power Amp Distortion had an extremely limited run in 1986 and is hard to come by these days. It’s beat up, but...

I built the Promethium and it works fine, but the LED doesn't light up. It switches on and off as expected, the continuity seems good on all of the off-board wiring, and the LED is getting 9V according to the multimeter. I tested a few different LEDs to see if I had a bad one, including...

I built an Acapulco Gold clone with an added gain knob. I realize the original is a one-knob power amp emulator, but I want mine to function as a more traditional two-knob distortion. Right now there is an A100K pot in the volume position, and unity gain comes early around 8 or 9 o’clock. Is...

Half of the screw head broke off. Now it won't twist and the knob is stuck to the pot shaft like glue. Any useful remedies? Bonus points if it preserves the rest of the knob.

I used SMD J201s from PedalPCB, all biased with a DMM to to 4.5V. The tone is set by ear. It sounds great and just like a JCM, but each of the four EQ pots do very little. The difference between max and min on each is no more than `15-20%. The drive is also unusably muddy past noon, if that...

I just built the Circulator and it worked on the first try, but it’s a lot subtler than expected. I am able to get a phase sound and each control does what it should, but I’m surprised by how dry it sounds compared to a good old Phase 90. The pots don’t respond through the whole range and...