[TowerTalk] Exothermic Welding?

John Langdon jlangdon@outer.net
Sun, 24 Oct 1999 09:03:01 -0500


Doc it works great but it is expensive compared to clamps. You have to get
the surfaces really clean and follow instructions carefully - but if you do
the results are very good.  I went with the compression clamps and lots of
cleaning kits and goop before putting them together.  If your major purpose
is lightning protection, I think the clamps are okay.  If you are trying to
generate the perfect pattern, or you are a broadcast engineer in a marginal
"proof of performance" situation, or are just borderline OCD like many of
us, then go with the CADWELD.

73 John N5CQ


-----Original Message-----
From: owner-towertalk@contesting.com
[mailto:owner-towertalk@contesting.com]On Behalf Of Richard Spindler
Sent: Sunday, October 24, 1999 7:50 AM
To: TowerTalk Reflector
Subject: [TowerTalk] Exothermic Welding?


I am getting ready to install some ground rods for the tower.

The PolyPhaser literature and, I believe, the NFPA literature talks
about welding the ground wire to the rods with "exothermic welding."

It sounds a little like witchcraft starting with some aluminum oxide
powder and copper powder and an ignition powder with a form to put it
all in.

Anybody acquainted with exothermic welding?

Doc, N9AM


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