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Greetings,
I'm curious to whom has experimented with the Sparkplug and some of its easily tweaked values. I've built 2 now, and have them before me to mess with this weekend. One has 2n7000s which sound a bit more biting/aggressive and the IRs are a bit more spongy/greasy to me. They have the stock opamp in them, but I think a mosfet opamp would match this better, or even a BurrBrown. I'm going to check these out in the morning as the kids are asleep---

Has anyone messed with these yet?

Ok, just curious if there are any ideas.... I've built several Sparkplug v1s, and loved them. This rev1 is my first time building the update. So it works great OUTSIDE the box (rock it before ya box it!) with the exception of picking up a radio station. I box it and it immediately starts feedbacking this "WEEEEEEEEEEEEE" noise that gets worse as you turn up vol and gain. You can hear the guitar signal through the noise, but the "WEEEE" is pretty overwhelming.

I've unboxed and reboxed 3x now, also double check ground, solder points etc.... This is far from my first build, and I'm perplexed. Any ideas?

****I hope I didn't double post this****

Ok, just curious if there are any ideas.... I've built several Sparkplug v1s, and loved them. This rev1 is my first time building the update. So it works great OUTSIDE the box (rock it before ya box it!) with the exception of picking up a radio station. I box it and it immediately starts feedbacking this "WEEEEEEEEEEEEE" noise that gets worse as you turn up vol and gain. You can hear the guitar signal through the noise, but the "WEEEE" is pretty overwhelming.

I've unboxed and reboxed 3x now, also double check ground, solder points etc.... This is far from my first build, and I'm perplexed. Any ideas?