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Re: [TowerTalk] polyrod

To: "RICHARD BOYD" <ke3q@msn.com>, "Tom Rauch" <w8ji@contesting.com>,<towertalk@contesting.com>, "Ken Claerbout" <K4ZW@Staffnet.com>,"Jim Lux" <jimlux@earthlink.net>
Subject: Re: [TowerTalk] polyrod
From: "Roger K8RI on Tower" <k8ri-tower@charter.net>
Date: Sun, 1 May 2005 01:31:52 -0400
List-post: <mailto:towertalk@contesting.com>
I purchased the Phillystran  3 or 4 years ago (give or take) and it wasn't 
that expensive.  50 some cents a foot for the 4400# test and I don't seem to 
find the invoice for the 6600#, but as I recall it was around a $1 a foot. 
I'll probably find it when I go out to the shop.

As far as stretch, there is very little in Phillystran, *but* you have to 
compare the stretch along with the give in the catenary.  I think you will 
find 1/4" EHS has a relatively deep catenary and when tentioned to the same 
as the equivelant Phyllistran allows more tower movement.  At least it sure 
feels like it to me, but that is not a real measurement.

Still, even at 50% I'd go for the Kevlar.
Both Phyllistran and fiberglass are sensitive to UV and moisture unless 
protected and the Phyllystran is so much easier to work with.  OTOH I do 
like fiberglass and carbon fiber for airplanes. <:-))

Today's prices are 89 cents a foot for the 4000 and $1.29 for the 6700.  The 
ratings are a bit different than when I purchased mine, but I'm not sure 
about the item numbers.

I haven't been able to find anything referencing poly rod, polyrod, or 
polygon on the net except links back to TowerTalk.

73

Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
> Polygon was 33-50% the price of Phillystran at the time, as I recall.  I 
> think it was very non-stretchy.
> -- KE3Q
>  ----- Original Message ----- 
>  From: Jim Lux<mailto:jimlux@earthlink.net>
>  To: Roger K8RI on Tower<mailto:k8ri-tower@charter.net> ; Tom 
> Rauch<mailto:w8ji@contesting.com> ; RICHARD BOYD<mailto:ke3q@msn.com> ; 
> towertalk@contesting.com<mailto:towertalk@contesting.com> ; Ken 
> Claerbout<mailto:K4ZW@Staffnet.com>
>  Sent: Saturday, April 30, 2005 10:44 PM
>  Subject: Re: [TowerTalk] polyrod
>
>
>
>  ----- Original Message -----
>  From: "Roger K8RI on Tower" 
> <k8ri-tower@charter.net<mailto:k8ri-tower@charter.net>>
>  To: "Tom Rauch" <w8ji@contesting.com<mailto:w8ji@contesting.com>>; 
> "RICHARD BOYD" <ke3q@msn.com<mailto:ke3q@msn.com>>;
>  <towertalk@contesting.com<mailto:towertalk@contesting.com>>; "Ken 
> Claerbout" <K4ZW@Staffnet.com<mailto:K4ZW@Staffnet.com>>
>  Sent: Saturday, April 30, 2005 6:29 PM
>  Subject: Re: [TowerTalk] polyrod
>
>
>  > Why not just use one of the Kevlar cables such as Phylistran, or the 
> one
>  AES
>  > sells just called Kevlar guy line?
>  >
>  > Nothing is perfect, but so far I like the light weight and easy 
> handeling
>  of
>  > the Kevlar lines.  Does Polyrod have an advantage over this?
>
>  What's the stretchy-ness of Polyrod vs aramid (Phillystran, Kevlar, etc.) 
> vs
>  steel?  That has an effect on the overall performance.
>
>
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
> 


_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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