[RFI] computer screen rfi

[Jim Brown]

Hi Kostas,

Two possibilities. 1) Direct radiation from the computer or the display. 
2) Radiation from the cables connected to the computer or the display or 
both.

Easy fix for #2 -- see k9yc.com/RFI-Ham.pdf and the applications note on 
k9yc.com about killing receive noise.  Multi-turn ferrite chokes on the 
cables. No easy fix for #1 -- it's a design defect of the 
noise-generating product. You've got to junk one or the other, depending 
on which is the culprit.

73, Jim K9YC

On Thu,12/22/2016 11:39 PM, Kostas SV1DPI wrote:
> Hello to all and Merry Christmas
>
> We have a problem in my club's station. When I turn on the computer's 
> screen everything is ok in our Kenwood 950. When I run VE7CC's cluster 
> program I can see 3 s-units noise. I thought that it was because of 
> the white colour but this does not happen if I open painting which has 
> also a white colour as background. Any ideas where is the problem?
>
> ...73 de Kostas SV1DPI
>   (One of SZ1A-EP6T)
>
>
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>