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Humming Power Supply?
Posted: 01 Oct 2018, 13:02
by cki69
Hallo,
I realize that my new Stage 3 88 humms when I switch it on. So that might be the Power Supply. The tone is always there and a bit annoying.
My Electro 5 does not make any noise here.
So is this normal? I read about interference problems with the Power Supplies here as well, so it would be interesting if others have the same problem.
Regards
Carsten.
Re: Humming Power Supply?
Posted: 01 Oct 2018, 17:52
by stringtapper
From what I’ve read here on the forum it’s normal. Mine does it too. I find I have to be in a very quiet environment or have my head right next to the back of the board to notice it anymore.
Re: Humming Power Supply?
Posted: 01 Oct 2018, 21:08
by NordNerd431
Mine does it too. Told it is the transistor, and that it’s normal. I don’t notice the noise bleeding into recordings or the PA, so it hasn’t bothered me.
Re: Humming Power Supply?
Posted: 01 Oct 2018, 21:54
by Hobster
I think you may mean transformer (as in, mains transformer)...

Re: Humming Power Supply?
Posted: 01 Oct 2018, 22:24
by cgrafx
Hobster wrote:I think you may mean transformer (as in, mains transformer)...

Actually I believe the noise is being generated by a DC voltage converter used in the OLED screen.
Re: Humming Power Supply?
Posted: 02 Oct 2018, 00:03
by Hobster
Ok, perhaps not mains, but a DC voltage converter is still a transformer of sorts...
I was basing it being mains on the fact that I was told by Nord (thru their distributor) that the hum in my old Electro 3 was generated by mechanical vibrations in the power supply transformer.
Re: Humming Power Supply?
Posted: 02 Oct 2018, 01:51
by aureliopenna
It's "normal" on Stage 3.
Re: Humming Power Supply?
Posted: 02 Oct 2018, 22:02
by cki69
Thanks for your answers.