[Towertalk] Lightning Protection

[Mark Beckwith]

Question to the experts.  I read this from Gene:

>I already have the three coax
>shields grounded just before they hit the suppressors out at the tower.
>(I'd rather keep the lightning in my back yard away from the house than
>conduct it closer to the shack before it's shunted by the suppressors.)

and wondered:

Let's say I DO put my Polyphasers at the tower bases.  My coax runs are
between 87 and 200 feet from there to the shack, above ground.  Isn't there
a chance lightning energy can still get on the coax after the Polyphasers?
Is that why Gene went on to do the following:

>I also have the shields grounded at a SPG plate
>in a steel box just outside the shack window.

?

Uh, what's a SPG plate?  Wouldn't that still leave your radios exposed to
the energy?  I have the chance to do this right, because I'm building
completely from scratch.  If I can't afford to to it right, I can at least
afford to remember to disconnect everything all the time.

What about alternatives when you have something like 16 or more incoming
feedlines?

Mark, N5OT