my choice is the pvc. i have had mine up for about four years now and it
hasn't broke yet. the kind you want to use is the schudule 80, it is
strong enough to hold it up even using alot of tension. if you want you
can tie a piece of rope from the end back to the tower. i have a length
of 6 feet i am using now with no end support and it has been fine.
73's to all Mike KE4LGL
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