Grounding and bonding is NOT about an earth connection, but rather the
proper bonding together of all earth electrodes as required both by
Electrical Codes and good engineering practice, the proper bonding
together of all equipment within the station, and the bonding of the
common point of those bonds to the earth electrode system.
Proper grounding and bonding serves at least three important purposes.
Most important, lightning protection. Second, minimizing the extent to
which interconnecting cables connected to equipment act as antennas when
connected to equipment with Pin One Problems. Every rig I was able to
study in booths the last time I was in Dayton and later at Visalia had
Pin One Problems at every connector except those for transmitting
antennas. Third, it minimizes power system hum (60 Hz) and buzz (triplen
harmonics of 60 Hz) that results from leakage currents (line to green)
on power wiring, and another mechanism too complex to discuss here. If I
can find it on my computer, I can send a pdf of an AES Paper by Bill
Whitlock, like myself, a Fellow of the AES and a principal author of
nearly all AES Standards on EMC.
73, Jim K9YC
On 6/28/2021 10:45 AM, David Eckhardt wrote:
There is no true "ground" for RF fields. Only returns. The space
station doesn't require a "ground" for comms to/from earth stations.
The Crab Nebula does not require a "ground" to fill deep space with
copious amounts of RF energy. I disagree with your statement: " That
indicates a problem with grounding and bonding ".
There is absolutely no way I could establish an adequate "ground" in my
decaying upper Permian / lower Triassic mudstone. And, what's more, I
do NOT have "RF in the Shack". Any good installation should have a lot
of RF in the shack if the antenna is operating as intended, just not
experiencing RF 'bites'.
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