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Next version... I was able to squeeze it down into a 125B, using a double stacked set of boards, 9mm pots, headers. No hookup wires! I designed it using SMDA with the intention of being able to assemble them in under an hour. I had one major problem to solve, @Robert & @joulupukki helped me...

Here's chatgpt's answer: Why electrolytics pop more than film caps 1. Electrolytic leakage current is orders of magnitude higher A typical small electrolytic (like your 10 µF): • Leakage: 1–10 µA is normal • That leakage charges the node feeding the 3PDT • When you stomp → the charged node...

Also so what is it about electrolytics that makes them cause pops and film doesn't.

Tagging @joulupukki

Well, that worked! 2.2u and 10k to ground. Interesting, if I click it a few times in a row I hear a thin click. But give it 5s and there's no click. So that means it's bleeding off but not fast enough if I click a few times in a row? That's a cutoff of 7 Hz. I could lower the 10k down to 2k...

I've got some 2.2u's

Maybe swap C10 for a 1u ?

Lasted about 30 seconds, but eventually the charge built up.

Please elaborate. Wouldn't R2 serve as a PDR for C1? It would be easy to add a 1M across the tip and ground of the jack. Should R2 go BEFORE C1? I guess I don't understand the difference for a non-polarized cap.

I fixed the schematic above to show pin 6 of the 3PDT is grounded in bypass/mute. I'm using a PPCB breakout board for the switch.

Hi, I have a circuit I've been working on. Newest iteration has switch pop that I didn't have before - this is usually considered DC offset across the switch hitting the audio path. I've simplified the circuit to just the below, a JFET and buffer. The switch is simply wired as a test case, to...

Here is a *terrible* demo. I thought my iphone would do better, but it doesn't capture what I was hearing at all. When I was demonstrating the notch, it was really feeding back hard, but you don't get that in the video. You can kinda hear the variation in the low end, but the variation in the...

Pricey as hell is right, that's why I started this whole thing. Felix is amazing, but wow, not worth that price. After years of experimenting with dual-source, I have moved away from that and simply use IR on my piezo pickups. Sounds better, simpler, no feedback issues, etc. Back then I always...

Sure I could do a simple walk through video, in True Bypass to hear with it on/off (should sound the same), play with some of the knobs, etc. Maybe later this week.

Theoretically, sure. But it wouldn't be simple. The set HPF could easily be removed to allow full range into the first gain stage. But most/all the EQ stages would need to have the frequency range adjusted. At the very least, the HPF/Notch range would obviously need to be lowered since right now...

Boards came in a few days ago, assembled one and it tested as expected. Web site as a LOT of details and documentation to dig through. I'm happy to answer any questions here, or hit the contact button. I started this project in fall of 2023... because I was annoyed at how expensive a Grace...

I finally got REW, and realized that my very old Presonus Audiobox kinda sucks from a noise (THD) perspective. So I upgraded to a Motu M4, much lower THD. Then I measured my Gamma Acoustic Preamp, it has a THD of 0.013%. I need to borrow some other acoustic preamps to compare. Grace Designs...

Just had $44 worth of stuff shipped GDS, delivered 10 days after order👍

What on earth are you putting on those “5” prototypes that add up to $330?!?