n4kg@juno.com wrote:
>Brad,
><SNIP>
>
>
>The alternatives are Phillystran or Fiberglass. Phillystran
>stretches more than steel or fiberglass which can cause
>greater stresses in the tower, especially with long lengths.
>
>Unfortunately, the fiberglass guy manufacturer requires 5000 ft
>minimum orders. They are willing to split orders for multiple buyers.
>
>Tom N4KG
>
>
>
>I use Phillystran on my 200 foot rotating Rohn 55. I have seven yagis for 6
>thru 40 meters on it. The longest lengths are 250 feet. I haven't noticed any
>stretching...although there may be some momentary flexing in the wind. I can't
>stretch it by hand and the tower seems to have no problems. The other thing
>that I like about Phillystran is its weight. I can carry a 250 foot length
>coiled over my shoulder and carry it around the antenna field Of course I
>wouldn't climb with it for safety reasons, but I could because it's so light.
>I couldn't handle a steel guy of that length do to weight.
>
73,
Dave, K4TO
>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|