[TowerTalk] Arrestor placement

[David Robbins]

Yes, it can make a big difference.  Lightning arresters are NOT just protecting you from a strike on your antenna.  They also protect you from a strike on the power line or even just to the ground nearby that causes the ground system voltage to rise while the voltage on the center of the coax doesn't... if the arrester is not very close to the radio it delays the arrester action which can make your radio the easiest path from ground to the center conductor... in hv engineering terms its called a backflashover, which is caused when lightning hits the ground system causing a flashover to a power conductor.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of David Gallatin via TowerTalk
Sent: Saturday, December 27, 2014 18:49
To: TowerTalk at contesting.com
Subject: [TowerTalk] Arrestor placement

Hello all,Somehow I have gotten the idea that one's lightning arrestors are best placed at the bottom of the tower. This seems logical to me. Then I came across another piece that said, no, arrestors are to be placed at the shack entrance panel. Which is it? Or does it matter?  73, David, AA9G

ex W5DCG and KC9EEV

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