"RF ground"
OK - I get your point. When I say "RF ground" I mean a place for
antenna return currents to flow
Back to my original question:
"Why did the installation of a 1/4 wave wire attached to ground, at/near
the coupler, cure my 30 meter noise problem?"
My guess: It provided a low-Z ground at that frequency, not unlike a
"tuned ground"
as for:
http://www.k9yc.com/GroundingAndAudio.pdf
I see I have a "pin 1" problem (Elecraft K2) and probably numerous other
grounding/bonding things I need to look at. I will do that in the weeks
ahead, but right now, I'm clean as a whistle.
Jerry
KI4IO
Warrenton, VA
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