[TowerTalk] EHS or Philly?

Tue May 16 11:38:22 EDT 2006

Jon

I echo the experience of other Philly users. Stretch is NOT a problem. I've
had some up for about 8-9 yrs. with no trouble at all. I think the Grape
software had a few too many (hi).

Bill WR8K

-----Original Message-----
From: Jon M. Knodel [mailto:jknodel at msn.com] 
Sent: Monday, May 15, 2006 4:42 AM
To: towertalk at contesting.com
Subject: [TowerTalk] EHS or Philly?

Hello all,

Thank you everyone for the help so far.  I am back with another question
though.

It has actually worked out that Phillystran would be cheaper for me to use
than EHS broken up into +/-11' lengths.  I am leaning toward using it but am
concerned about it's stretch.  On K7NV's site (great info on tower design
and loading), he runs one scenario (using Grape software) where the tower
actually failed due to the Phillystran stretching too much.  Granted, this
was on a 100' R45 and my installation would be a 60' R25 but it still
concerns me.  Do you think it would be possible for the Philly to cause a
failure?  If so, would it be solved by increased initial tensioning (say 15%
or maybe even 20% as compared to 10%)?  Any help would definitely be
appreciated.  Thanks.

73 es gud DX!,

Jon, N7XW

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