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[KitShunt]

Hey there.

I have put together a recreation of the boss ds-1 distortion pedal from the original schematic and it works great!

Only thing is, when i try to power it from the mains, it picks up a really annoying mains hum which i can't seem to get rid of...

Any ideas anyone? Would be much appreciated!

James.

[Circuitbenders]

It could be any number of things on a homemade pedal, the first thing i'd do is check the jack sockets and everything else is grounded properly, and then check again.

[KitShunt]

Yeh, that's what I thought, but having trouble tracking down the problem so far...

An electronics friend of mine suggested sticking a couple of caps across the power supply connections (de-coupling??), which has worked a bit, but the hum is still too loud for the circuit to be useful.

[noiseybeast]

You've probably tried this, but have you tried a different power supply?

[Dylan]

Sorry raise this topic from the grave, but if you're still having this problem, you may want to check this out http://beavisaudio.com/projects/Huminator/index.htm It's just a small little circuit that you can add to the DC jack on your pedal or build it stand alone (as in the article) that gets rid of hum.

[KitShunt]

Nice one Dylan!

I never got round to sorting it out, been busy with other things so just had it running off a battery.

I'll definitely try that out :-)

[Dylan]

No problem. I installed a bastardized version of that circuit into a pedal I made and it worked fairly well. Depending on the amount of buzz you're getting, try different cap values.