[TowerTalk] Lightning Protection Question

[Jim Brown]

On Sat, 11 Sep 2010 10:57:06 -0400, Gene Smar wrote:

>It depends.  I have my Polyphasers at the NEMA box at the tower base, 
>but I also have a remote coax switch there, too. 

I disagree (and agree with K1TTT) -- lightning protection devices are 
protecting you radios by short the voltage on the center conductor to 
the shield. They cannot do that at the tower -- voltage can be induced 
on the coax between the tower and the shack, and a protector at the 
tower is too far away to offer much protection at RF. The best place for 
them is at the entry  panel to the shack. 

The SHIELDS of coax SHOULD be bonded at top and bottom of the tower. 

73, Jim K9YC