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Re: Topband: Insulated Tower

To: "Joe Wilkowski" <k8fc@k8fc.com>, <topband@contesting.com>
Subject: Re: Topband: Insulated Tower
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Tue, 9 Dec 2003 07:30:28 -0500
List-post: <mailto:topband@contesting.com>
> Thanks in advance, please feel free to load up the flame throwers.

I don't know the electrical characteristics of concrete at 1.8MHz, but I
wouldn't trust it. It will almost certainly stay very damp and almost
certainly be very conductive, unless you live in a desert. If it didn't work
you could always ground the tower and shunt feed it.

I have a more important concern. How will the water drain out of the tower
legs if you set the base that way? I've seen at least a half dozen towers
fail at least partially because people set the legs in mud or concrete with
no drainage. My neighbor has one (Rohn 25)that will eventually fall, because
the legs are already split and rotting and no one will take it down.

The two most common flaws in tower constriction are clamps on the wrong way
(U bolt against load-bearing wire) and leg drainage.

73 Tom


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