[TowerTalk] another Lightning Protection Question
Jim Brown
jim at audiosystemsgroup.com
Tue Sep 14 09:57:39 PDT 2010
On Tue, 14 Sep 2010 08:29:33 -0400, Bill NY9H wrote:
>my question : at he house i have redundant polyphasers ( already own
>them )...on another set of 5 ground rods at the house...
Hi Bill,
You've got it backwards -- the polyphasers at the tower are the redundant
ones, the ones at the house are the critical ones. You want them as close to
the equipment as practical. Thinking of the "ground window" where all your
antenna cables enter the shack, you want them there. You want short beefy
copper to your ground rods (AND AC POWER grounds, AND CATV ground, AND telco
ground, AND operating desk) from that panel.
There are two parts to the equation. Part One is the bonding of the coax
connector shields (the Polyphaser body), and of all of the other cables that
enter your house, to that ground system, creates the shortest practical path
for the strike away from equipment inside the house. Part Two is the element
inside the Polyphasers, which shorts the center conductor to the shield,
which protects the equipment antenna input/output.
73, Jim K9YC
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