On 11/10/2017 10:14 AM, David Robbins wrote:
At the
entrance to the shack you have lightning arresters that take some of that
high voltage from the shield and put it on the AC line and coax center
conductor so there is no voltage difference when it gets to the radio. No
voltage difference, no arcing to let out the magic smoke and everyone is
happy.
Important clarification, David. It is the BONDING of the coax shield to
the house ground system, AND The proper BONDING of everything in the
house that solves this problem, NOT the arrestor. The shield bond can be
provided by nothing more than a coax feedthrough on a panel that is
properly bonded to the house ground system. The arrestor minimizes the
DIFFERENTIAL voltage on the coax shield, which protects the front end of
the radio.
The arrestor, properly installed at the entry panel, does both.
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|