[Elecraft] K3 Antenna static bleed
Phil & Debbie Salas
dpsalas at tx.rr.com
Fri Feb 25 07:52:06 EST 2011
"...While the K3 has static protective devices that have been mentioned by
others, I prefer to err on the side of caution. ...The UHF connector has
one problem for antenna/feedline static charge - if the antenna has built up
a static charge, when the feedline is connected to an SO-239 jack, the
center conductor makes contact first, followed by the shield. So the best
solution is a DC path provided within the antenna/feedline system itself
rather than relying on any protection in the K3... 73, Don W3FPR"
I completely agree with Don. For any of my antennas that aren't normally DC
grounded (like with a gamma match or a balun), I permanently mount a high
value resistor directly across the antenna feedpoint to keep the antenna
discharged. This will also help protect your SWR Analyzer when you hook-up
to the antenna to make measurements. I also have a MFJ-4726 antenna switch
in the shack that grounds unused inputs (and all inputs when not powered),
and ICE in-line arrestors at the feedline entrance.
Phil - AD5X
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