How do I fix a hum problem?

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How do I fix a hum problem?

Postby travsbluz » 03 Jun 2009, 17:12

I've built ROG Umble pedal and it has knocked a few other Dirt boxes off my board. My only problem is it gets what I would call excessive hum. Is there any way to eliminate or tame it down some?

I did do a search and I found some info about using a 100 ohm resistor followed by a 100uf Electro to ground at the start of the +9v in?? Would something like that work? If so where can a learn a bit more about this type of thing?

To let you know I followed the Schematic and perfboard layout on ROG website for it.

Let me know if any pics of the build are needed as well, I can have them in a few days?

Thanks for your time and any help,
Travis
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Re: How do I fix a hum problem?

Postby Paul Marossy » 03 Jun 2009, 17:40

It may be that you have hum getting into your system elsewhere and any high gain pedal will pick it up and amplify it a lot. It's happened to me many times.

Once I had a patch cord running too close to a wall wart, and you couldn't hear any hum until you switched on a high gain distortion pedal. When I re-routed that patch cord, 90% of the problem went away.
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Re: How do I fix a hum problem?

Postby travsbluz » 03 Jun 2009, 21:15

I will look into that. I'll run the pedal alone and just with the battery tonight and see if that clears anything up.

Trav
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