Fuzz Foundry but without the fuzz...

[ericsinsideout]

I just wrapped up 2 Fuzz Foundry PCBs, one for me and one for a bandmate, but neither of them seem to be working right. The controls all seem to do something, but sound is very weak, there's next to no fuzz and everything has to be cranked to max just to get a little breakup and reach unity. Overall, the build is simple and everything on there is exactly what the doc called for with the only exception of the germanium transistors (swapped the AC128 for BC109).

Any tips on how I can get this thing blowing out some windows?

 

[Big Monk]

I just wrapped up 2 Fuzz Foundry PCBs, one for me and one for a bandmate, but neither of them seem to be working right. The controls all seem to do something, but sound is very weak, there's next to no fuzz and everything has to be cranked to max just to get a little breakup and reach unity. Overall, the build is simple and everything on there is exactly what the doc called for with the only exception of the germanium transistors (swapped the AC128 for BC109).

Any tips on how I can get this thing blowing out some windows?

The BC109 is an NPN transistor. Try swapping in a 2N3906 in each of those slots.

 

[BuddytheReow]

AC128 is PNP and BC109 is NPN. You can try flipping the emitter/collector pins and it should work better, but not perfect. From what I've heard, nearly any Ge PNP will work.

 

[ericsinsideout]

I tried flipping the BC109s around and pretty much had the same results. Plugged in a couple 2N3906s and now I'm getting some real fuzz!

I appreciate the tips from you both!