At 12:47 PM 11/26/2006, Bill Turner wrote:
>I've read the PolyPhaser document on protection for ham stations but
>it is vague on how to protect rotator cables. First, I wonder how much
>protection, if any, is needed in the first place? In my tower, the
>rotator is inside the tower and the control lines run down inside the
>tower as well. Coming out from the tower at the bottom, they run
>underground to the shack, about 70 feet away. It seems to me that
>neither the rotator nor the lines
``~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interesting thoughts. I NEVER ran any Polyphasers etc on my rotor cables.
Everything was disconnected at the bulkhead by Cinch-Jones plugs. Amazingly
even though I had lots of rotors on the 200 foot towers, I never had a rotor
failure from a lightning hit...mechanical damage from wind etc, but no
electrical problems. My gut feeling is there are few direct hits on the rotor
cables and most of the damage from non-disconnected stems from the induced
voltage of the hit and perhaps providing a great ground for the main lighting
charge to travel to ground through the house mains by way of a short, jumping
from
the tower or coax to the cable.
Bill K4XS/KH6
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