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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