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I recently got some 3/8" internal tooth lock washers thinking they should help with 1/4" jacks coming loose over time but it seems they actually perform worse when it comes to rotational forces. I use Rean NYS229 and Lumberg KLBM 3 jacks exclusively and both seem to have better grip without lock...

I just wanted to breadboard a Brian May treble booster. Now here I am over half a year later with my own treble booster design while still not having breadboarded a Brian May booster. Oh well. At its heart this is still just a Rangemaster. There's an aggressive bass cut followed by a single...

I know about those standard 6x3x3" boxes you guys in the US got, but those are pretty much not available in Europe. Any similar suggestions other than going completely custom? These aren't meant to be shipping boxes but for giving customers a box to go along with their pedal. I got some...

I'm working on pedal recreation of the preamp section of a solid state guitar amp. I want to stay true to the original and use the same or similarly spec'd op amps throughout. Due to the circuit design, I could either use two separate single op amps for the input and output sections, or use one...

I nicknamed this build the BSMSB – Buffer-Splitter-Mixer-Switcher-Boost. It does pretty much what the name suggests, although the splitter-mixer part doesn't really work particularly well. More on that later. A simple non-inverting op amp circuit provides adjustable gain from unity to +20 dB...

It's a RAT with a clean blend and some extra tonal options. I like it but I don't love it. Clean blends on distortion effects aren't really for me, neither on guitar nor on bass. I just find it always sounds like two separate signals - which they are - and it's hard to make them sound cohesive...

Most isolated DC-DC converters have a maximum capacitive load spec. Exceeding this limit can kill the converter or at least result in serious start-up problems from what I read. For capacitors directly across the converter outputs it's easy enough to figure out the load, just add up the values...

So far, I've been using RG174 for shielded I/O wiring when required, but would be interested in a solid core alternative. I generally like the RG174, but don't trust the solder joints to withstand more than one or two reboxings of an effect. It always feels like it's about to snap at any moment...

Bit of a cursed build. Soldering the components went fine, drilling at first also went fine, problems started to arise once I actually went to box up the thing. I soldered in the rotary switch first, which turned out to be a bad idea. The body is a little shallower than that of the pot with a...

I was working on some nice enclosure art for this, but it's been a while since my last pedal and I just wanted to build and play something new. So I sanded down a bare aluminum 125B by hand real quick (it wasn't quick at all...) for a brushed aluminum finish. Turned out okay-ish. I like this...

What is the purpose of R2, R3 and C2 in the input section?

I was experimenting with the below Rat circuit (Aion FX Helios). The mode switch is on-off-on. I took out the LEDs (D8, D9) in order to only hear the op amp clipping with the switch in the off position. Another mod was taking out the diodes D4, D6 and D7, leaving only a single 1N914 (D5)...

A couple of firsts for me with this build: -First time using a drill press. I love it. Should have gotten one sooner. -First time hand-finishing a bare aluminum enclosure. I wanted a brushed aluminum look, so I just went straight in wet sanding with 120 grit sandpaper, moving the enclosure back...

The original Sunn Beta Lead and Bass amps have two identical channels that can be run in parallel. I've never played these amps but built both lead and bass versions of the Aion FX Beta Preamp - a single channel pedal adaptation of the Sunn Beta's preamp section. I loved the sounds I was getting...

Smooth build for the most part, the board seems needlessly cramped though. Had to mount the 220n cap upside down due to clearance issues and could not get the charge pump socket completely flush with the board because of the neighboring diodes. Also, gotta be careful around the electrolytics...

Thought I'd post this here in case someone finds it useful. I know I do. It's pretty much just two 20K pots each in series with a 1K resistor to prevent burning out LEDs. Can be used to eyeball indicator LED brightness and find the corresponding CLR value. Just turn the pot until it looks right...

Well, what can I say. It sounds like a rat, looks like a rat, it's a rat! Similar to the PPCB Triad Distortion it's got a switch to toggle between different clipping diode arrangements. Left is one 1N914 in each direction, middle is one red LED in each direction, right is a 1N914 one way and a...

Finally got around to doing a playthrough of my Brown Betty build (https://forum.pedalpcb.com/threads/pedalpcb-brown-betty-with-voicing-switch-brown-betty-dirty-sanchez-thermionic.23755/). This one comes with a switch to toggle between Thermionic, Dirty Sanchez and Brown Betty specs. Vero layout...

So I built a Brown Betty and since I hate commitment I added a switch to toggle between Brown Betty, Dirty Sanchez and Thermionic Deluxe specs. I had some concerns that the wiring to the switch would add significant noise but it turned out fine. Two resistors (or trimpots if I can fit them) are...

I have a simple op amp buffer circuit and was wondering whether there would be any downsides to replacing the feedback resistor with a pot wired as a variable resistor in order to control op amp gain. As far as I can tell the below circuit should give me roughly 20 dB of gain with the pot fully...