Reducing Jordan Bosstone Hum

[safd]

Hi,

My bosstone build sounds great, but I was wondering what could I do to eliminate some of its background hum. I read something about putting a 100pf from output to ground and a 22pf from input to ground; would doing this work without affecting the pedal's natural voice too much?

Thanks!

[Mark Hammer]

For anything that has a lot of gain, proper layout and shielding is a must.

[safd]

I've been quite meticulous about the grounding and wiring of the build. As it stands, my bosstone is about as noisy as a standard fuzzface (which isn't that bad at all). I was just seeing what other options there are to bring down the noise level in my fuzz builds

[brett]

Hi
small caps to ground will tame hiss, not hum.

Make sure you are using low(ish) hFE transistors.
The originals would have been around 120 to 150.
I used BD139s (hFE=150) and got a great result.
cheers

[LucifersTrip]

I usually can reduce many noises (hiss, hum, oscillation) with a small cap (50-200pf) across B-C.  but in some circuits it will tame (reduce treble, fuzz) too much. I'd try that on Q1 here.

btw, i finished the JB a short time ago. it was excellent stock, but I liked it even more when I increased either or both the in/out caps to .044 (I put a switch on both).

usually, I add major mods / pot(s) to control tones, but this was great stock

edit: schematic added for reference: