Ground humming

Stompboxes circuits published in magazines, books or on DIY electronics websites.

Ground humming

Postby mingorius » 25 Mar 2017, 15:12

Hi, I am new in building DIY guitar pedals.

I own a project studio and started to build some pedals to experiment while mixing tracks with them.

I built a simple overdrive first. It works well, but there is a humming, which is kind of loud.

If I touch the output-cable it goes away.

Does anybody know a "trick" to kill the humming by wire the ground to the chassis or anything like that?

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Re: Ground humming

Postby phatt » 27 Mar 2017, 08:56

Yes Ground the chassis!!!
In some cases with a lot of interconnections you may need to do the opposite. Some DI boxes have a switch to lift the ground.
Jensen transformer site used to have a whole list of PDF files relating to grounding issues and how to solve them,,have a search of their site,,
it may still be there.
HTH,, Phil.
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