On Wed,6/29/2016 8:43 AM, Gary Smith wrote:
That said, I do think better control wires are needed and I can
convert the existing CAT6 wires into 4 more radials for 160.
It's always useful to think about the mechanism by which RF induced onto
those control wires might cause difficulty. They're driving relays, so
no RF susceptibility there, and you've observed no issues in the control
electronics that drives them. So -- I wouldn't worry about anything more
than physical properties and Ohm's law in choosing those cables. And
since CAT5/6 is working, conductors of modest size appear to be sufficient.
What I WOULD do is choke them well at the frequencies of interest, not
only in the shack, but at intermediate points, so that they receive and
re-radiate RF noise. Since they're not carrying TX RF, turns around a
single toroid or clamp-on should be sufficient.
73, Jim K9YC
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