Re: P3 SVGA external monitor freezes - RFI?

Posted by Jim Brown-10 on Nov 05, 2014; 7:46pm
URL: http://elecraft.85.s1.nabble.com/P3-SVGA-external-monitor-freezes-RFI-tp7594411p7594416.html

On 11/5/2014 9:32 AM, 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.

Probably yes. Perhaps a bad cable between the monitor and the P3.

Beads on cables do not solve problems with HF RFI. Multiple turns
through a bead or core are needed. Study k9yc.com/FRI-Ham.pdf

A neighbor ham gave me a Samsung monitor that has very bad RFI
susceptibility, and it also generates RF trash. It runs on 12V, but
running from a 12V battery does not help, and I've not been able to
solve it with chokes. RF coupling is via internal wiring and poor
shielding.

73, Jim K9YC


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