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Re: [TowerTalk] Dismantling an old 40m beam

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Dismantling an old 40m beam
From: David Gilbert <xdavid@cis-broadband.com>
Date: Thu, 12 Mar 2020 00:37:24 -0700
List-post: <mailto:towertalk@contesting.com>

Since he said the elements were held together with screws I suspect that the problem is actually the hole deformation anyway.  Screws push material from one tube into the other tube, making a kind of pseudo rivet that remains even after the screw is removed.  Drilling out the hole might work.

73,
Dave  AB7E


On 3/11/2020 5:37 AM, john@kk9a.com wrote:
Since aluminum tubing is thin and it has very high thermal conductivity I question how effective this method is.

John KK9A


Tom Hellem K0SN

Ignacy-
Try heating the larger diameter tubing portion close to the joint while simultaneously cooling the smaller diameter portion which is telescoped inside of it.

Tom H
K0SN

On Mar 6, 2020, at 5:48 AM, Ignacy Misztal <no9e at arrl.net> wrote:

I bought a 40m old beam that needs to be dismantled. With screws out the
elements do not move. Any idea what to do?

Ignacy, NO9E

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