[Elecraft] P3 SVGA external monitor freezes - RFI?

[Mike K2MK]

Hi Mike,

I think multiple ferrites will help but you might be surprised to find that
it works best when applied to a cable you haven't yet tried. Take off all of
the clamp-ons and get things set up to reliably cause RFI. Then put 4 or 5
clamp-ons on one cable at a time. Try this on every cable in and out of your
equipment. Such as the DC cable from your power supply to the K3. Then move
onto the various PC cables. 

One of those cables is bound to show a reduction in RFI. When that happens
just keep loading on the ferrites. For serious RFI one or two ferrites on a
cable is never enough.

73,
Mike K2MK


mike wrote
> When using KPA500 my external monitor (and the P3 display) often freezes,
> sometimes up to 5 seconds, after I transmit. With the external display
> disabled, the P3 does not freeze (and incidentally it refreshes much
> faster without the ext monitor enabled.) I also notice a slight flickering
> of the monitor screen while transmitting. I take this to be a RFI problem.
> I have added four snap on ferrite beads on each end of the VGA cable. The
> monitor is as far away from the amp and feedlines as I can get it and all
> equipment K3, P3, KPA500, KAT500 are bonded to a ground bus. This is not
> unique to this monitor as it happened with a different smaller monitor I
> used before.
> 
> This has always been a problem, and I would like to eliminate it as it is
> very disruptive to is usefulness in finding a clear spot to break through
> a pileup. Not sure what else to do. Has anyone else had this issue? 
> 
>  ..mike  AI6II





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