[Elecraft] Computer Noise ruining 20 & 30m

[Tom Childers, N5GE]

On Fri, 11 Jan 2008 10:03:27 -0500, W3DVX wrote:

>Hello,
>I gave away the feeble old PC I had by my radio equipment and replaced 
>it with a newer one ...
>
>Now I have S9+ noise wiping out 20 and 30 meters.
>
>Using same keyboard, mouse, monitor; just the PC in a new case. 
>Evidently it has a
>noisy switcher supply in it. Tried 110V in-line filter, also different 
>110V house circuit,
>but still have noise. Grounds don't help. Don't happen to have a box of 
>toroids for chokes.
>
>I've got an old PC supply or two in the junk box, but hoping something 
>else might fix.


Does anyone have a sample recording of a switching power supply noise they could
post somewhere?

I don't use a switching power supply for running the rigs here, but I'm using a
new style dual core power supply in my computer.  Trouble is I don't know what
the switching noise sounds like.

Thanks,

Tom, N5GE - SWOT 3537 - Grid EM12jq

They that can give up essential liberty
to obtain a little temporary safety
deserve neither liberty nor safety.

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