bringing up the intersting question of how one could protect buried aluminum.
Coatings can crack or be scratched, although there might be some viable
techniques.
Jim Lux
-----Original Message-----
From: "Dan Hearn" <dhearn@air-pipe.com>
Subj: [TowerTalk] Aluminum wire radials
Date: Fri Nov 17, 2006 7:40 am
Size: 816 bytes
To: "T talk" <towertalk@contesting.com>
I used aluminum wire radials on a Hy Tower in Dallas TX. After a year or so
I pulled on the radial wires at the tower base and a short piece of wire
came out of the ground. They were severely corroded thru. The soil there is
alkaline and has very good conductivity. A 4square array installed later
using nr 16 solid bare copper wire worked for years with no such problems.
The ground conductivity map in the ARRL handbook shows a large band of
high conductivity running north/south through the central states. I wonder
if most highly conductive ground is alkaline. The 4 square worked great, Hi.
73, Dan, N5AR
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