On Thu,2/18/2016 4:42 PM, Gerald Wolczanski wrote:
QUESTION: The tuner settings didn't change much. I surmise that my
ground on 30 meters is now a low-Z...and the RF-in-the-shack problem
went away. Is that right? What happened here?
You are confused about the difference between "grounding" and "bonding."
I suggest that you study this tutorial on the subject. A year or two
ago, N0AX used it as the jumping off point for a series of QST columns.
http://k9yc.com/GroundingAndAudio.pdf
In short, that wire you're using to "ground" your computer is acting as
an antenna to radiate the RF trash that's on it's chassis. What you need
is bonding. A connection to the earth is NOT part of a solution to hum,
buzz, or RFI, and, as you have seen, can often be a cause of problems.
It is needed only for lightning safety.
73, Jim K9YC
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