I'd bet that in most cases, the outside of the shield (if not buried) is a
lower impedance (unless it's just the right length) than anything in the soil,
though.
On Sat, 27 Sep 2025 00:31:01 -0700, Brian Beezley <k6sti@att.net> wrote:
"This one bothers me. Remember that there really is no such thing as
ground for RF - that ground rod is strictly for lightning / static
currents. Connecting the shield to a “grounding point” will simply
combine the inner and outer currents. That’s really not what we want to
do. You need instead to choke off the RF current on the outside of the
shield."
Jack, I do not assume that a ground connection has 0 ohms RF impedance.
All I was looking for was a low impedance to shunt off most of the coax
shield current. Shield current splits at a junction. If the impedance
looking toward the ground point is lower than that looking toward the
shack, it will carry most of the current. If it is much lower, it should
keep nearly all of it out of the shack.
Brian
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