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So I ended up using a MP38A with an hfe of 120 for the AC176 and CV7351's with hfe of 215 for the 2N1308. The reaper side sounds fantastic but I have an issue with the tone stack on the hoof side that I'm currently debugging. I'd think you could try out some silicon transistors with similar...

Incredible stuff as always! Would love to hear more about these mods if you feel like sharing.

Just ordered the Mini version and am wondering about the schematic as well. I'd like to add a trimmer for output volume but don't know which resistor to swap out. Thanks!

I just built one of these with the same issue. Ended up replacing R4 with a 20k trimmer to get the volume just right.

Awesome! Thanks so much. Still learning about how circuits work but it's starting to make sense.

Just wrapped up the Spirit Box and really like the sound, except it seems to be a bit quiet. Would increasing R4 or replacing it with a 25k trimmer help me get the output volume just right? I think that's how this circuit works but I'd like to check with the knowledgeable folks here before I...

Thank you! And yes, used a few layers of clear coat to keep the paint safe. Right? It's a very tight fit so you have to either drill really precise or get a little creative to make it all fit. It's definitely been taking practice to get it working right but I think I've got my system down...

So I've built a bunch of projects from here but am pretty new to the forum.... Figured it was time to show off some of my favorite ones so far! First up is the Mach 1 (Greer Lightspeed). I built one of these for a friend and liked it so much I had to build a 2nd for myself. It's pretty low...

Very nice! I just ordered one of these for myself as a klone alternative and am excited to build it. What's up with the 22n cap on the volume lugs though?

Been building tons of PCB based projects and decided it's time to try out breadboarding and experimenting with circuits. This ProtoBoard seems perfect but I can't seem to find the BOM or build documents for it. Also, any recommendations on some of the hardware pieces would be much appreciated...

I really love these! I've been playing around with aluminum black and alcohol inks or acrylic paints, which has been a lot of fun. Food coloring and enamel seems like a great idea to try next!