[TowerTalk] RF Ground is a Myth

[john at kk9a.com]

I did not noticed that the original post mentioned a 14' base section. I
would agree that on big tower bases with separate concrete foundations it
would be important to ground each leg. Perhaps this procedure was somehow
adopted to smaller ham towers.

John KK9A



To:	<towertalk at contesting.com>
Subject:	Re: [TowerTalk] RF Ground is a Myth
From:	"Jim Thomson" <jim.thom at telus.net>
Date:	Wed, 21 Jan 2015 19:38:03 -0800

Date: Wed, 21 Jan 2015 12:51:38 -0600
From: "john at kk9a.com" <john at kk9a.com>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: RF Ground is a Myth

What is the purpose of grounding each tower leg? I have not done this. My
towers have tapered pier pin bases and I have lines of ground rods
connected to two legs. Even with a straight base I find it hard to believe
that connecting one leg to a fantastic ground system would be
insufficient.

John KK9A

##  You folks all missed the point.  The fellow has a big mother tower
with 14 feet between legs !!

##  he said...
I have a triangular tower with legs on 14 ft centers, yes, 14 feet, not
inches.  I built it with three SEPARATE concrete foundations, one per
leg.  It is currently tilted over so one leg is not touching its
concrete embedded mechanical connection/mount.

##  On big towers like that, or even on smaller ones like my old trylon
which are 52 inch  corner to corner, on any of the 3 sides, you always use
at least 3 ground rods.    Besides, the new eia-RS-222-rev G spec sez  you
require a min of TWO ground rods for the base of the tower.   The 2nd one
is for redundancy.   The 2 x rod setup applies to small towers like 25G.

#
Jim   VE7RF