PSN-L Email List Message

Subject: Re: noisy power supply
From: BOB BARNS roybar@........
Date: Fri, 07 Jul 2000 10:12:17 -0400


Al,
  Your mention of ferrite supperssors reminded me that I once reduced
high freq. noise from a computer by placing a (split) ferrite block
around the cable connecting the keyboard to the computer.
Bob



Al Allworth wrote:
> 
> Have you tried a large ferrite suppressor bead or
>  two on the power cord?  Some are split and
> clamped around the cord near the power supply.
> _______________________________
> 
>                      Al  Allworth
> 
> On the Beautiful Southern Oregon Coast
> 
> ________________________________
> ----- Original Message -----
> From: 
> To: 
> Sent: Thursday, July 06, 2000 6:18 PM
> Subject: Re: noisy power supply
> 
> > In a message dated 05/07/00 05:48:05 GMT Daylight Time, angel@............
> > writes:
> >
> > >  I just got me new computer and much to my chagrin now all four of the
> > >  traces on SDR are much noisier.  Little spikes, jus ta few counts.
> When I
> > > turn off the
> > >  new computer the noise goes away and when turn it on the noise comes
> > >  back.  Obviously one solution is to not turn on the computer.  Are
> there
> > >  any others?
> >
> >     Two quick thoughts. Have you checked that the Earth connection to your
> > power socket really IS Earth and it's resistance? Second, it's a new
> computer
> > and it is giving problems --- COMPLAIN and demand that the shop get it
> fixed.
> > Why should YOU have to solve the problem?
> >
> >     Regards,
> >
> >     Chris
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Larry Cochrane <cochrane@..............>