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[TowerTalk] surge arrestors or good grounding?

To: Steve Maki <lists@oakcom.org>, towertalk <towertalk@contesting.com>
Subject: [TowerTalk] surge arrestors or good grounding?
From: Grant Saviers <grants2@pacbell.net>
Date: Wed, 05 Aug 2015 20:06:30 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I'm wondering what commercial practice is re surge arrestors?

I note the max power ratings for DIN connector arrestors is 250 watts at least at Tessco. Many are frequency selective. PolyPhasers claim 2500 watts 1.5MHz to UHF.
With top and bottom tower bonding to a ground rod grid and 125' to tower 
in a trench with the shack entry plate feedthrough grounded to a 200' 
perimeter footing Ufer, to center pin arrestors do anything useful?
Tower and trench coax is all DIN terminated hardline, so it would make 
sense to connect to a DIN connector arrestor (if useful), but no such 
QRO animal seems to exist.
Grant KZ1W

On 8/5/2015 17:35 PM, Steve Maki wrote:
Well yes, surge arrestors *usually* are M-F, but usually get attached directly to the main line, so functionally you end up in the same condition.
But point taken, there are exceptions to every rule. I find it easiest 
to go F-F on main lines, and do what I need to do on the ends.
-Steve K8LX


On 8/5/2015 8:27 PM, J. Hunt via TowerTalk wrote:

Sorry - not quite correct.

PolyPhasers have both M and F connections, not all " Peripherals and end devices (radios, wattmeters, switches, baluns,
  antennas, etc.) all have female panel connectors" - I have seen both.

So please plan ahead of your entire installation plan.

I have several runs of Andrews Heliax. Not all the runs are terminated the same...
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