[TowerTalk] Feedline (choke) question

[Brian Beezley]

"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