Noise in Power Supplies

[GoldenVulture]

Power Supplies -as in Effects Pedal P.S's.Any mods /ideas on stemming AC noise.Been searching ,but i can't find much on pedals and P.S's.

[Sporky McGuffin]

Re: Noise in Power Supplies

D'you mean 50/60Hz hum?

[GoldenVulture]

Re: Noise in Power Supplies

That's what i figure it is.I am wondering if there's a DC hum there too!

[Bender]

Re: Noise in Power Supplies

most hum is going to be 50/60 hz . You can purchase a noise supressor to plug the PS into and helps eliminate a lot of the hum.
Make sure you have a good ground. Some PS's only have two conductor power cords with no ground and can cause problems with excess noise.
Also, check the output cords from the PS in some cases a nick in the wiring insulation can cause a pick up of outside noise. It's rare but has happened to me.
Some power supplies don't ground the transformer. You might check that as well.

[ArtieToo]

Re: Noise in Power Supplies

Here's a good read. Not too long either.

http://www.muzique.com/editor.htm

Be sure to click on the "Lab Notebook" link in that first paragraph for more info.

[GoldenVulture]

Re: Noise in Power Supplies

Thanks for your suggestions.

I have covered most of those areas,I was after something more about filtering?It's a DIY thing.