On 3/27/2019 1:37 PM, k7lxc--- via TowerTalk wrote:
In a vertical xmit antenna, is there a compelling reason to use ground rods
near the antenna (vis-a-vis tower lightning grounding) in addition to radials?
Only if you put an arrestor with a GDT there, and doing so is worth it,
because it provides additional lightning protection by giving the strike
current a path to ground before the ground system for your home/shack.
The logic is the same as for multiple rods surrounding a tower and
bonded to it.
If you have a number of radials going out from the tower, do close ground rods
add anything signal/efficiency-wise?
NO! Except for some RX antennas, ground rods do NOT make antennas work
better. Other than for RX antennas that need them, their only reason for
existence is lightning protection.
73, Jim K9YC
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