[TowerTalk] Lexan - Element to mast plate

[TexasRF at aol.com]

A Google search for Lexan specifications will return plenty of info.
 
Lexan is a GE brand name for polycarbonate material. There are a number of  
manufacturers of the polycarbonate stuff today and readily available 
through  plastics supply companies.
 
Great stuff, just wish it was less expensive. I need a couple of 4ft square 
 by 1/2" thick pieces for a project and the best price I can find is around 
$400,  ouch!
 
73,
Gerald K5GW
 
 
 
 
 
In a message dated 5/18/2011 9:29:58 P.M. Central Daylight Time,  
akozak at hourglass.com writes:

It's  SABIC now.  GE sold the Plastics business in 2007.  The bulletproof  
Lexan was made by the Structured Products Group in Mt. Vernon IN, where the  
original Lexan resin plant was  located.

Al
AB2ZY

-----Original Message-----
From:  towertalk-bounces at contesting.com 
[mailto:towertalk-bounces at contesting.com] On  Behalf Of Gene Fuller
Sent: Wednesday, May 18, 2011 9:42 PM
To: Mickey  Baker; dave arruzza
Cc: towertalk at contesting.com
Subject: Re:  [TowerTalk] Lexan - Element to mast plate

I use 1/8" clear lexan as  spacers for linear loading and for the boom 
feedline on my 7-60 MHz log  periodic. It's been up for about 8 years now with 
no problems.
If you want  real engineering/technical info I suggest you contact GE. 
Their Lexan labs  used to be in western MA.
Gene / W2LU

----- Original Message  -----
From: "Mickey Baker" <fishflorida at gmail.com>
To: "dave  arruzza" <w1ctn at yahoo.com>
Cc:  <towertalk at contesting.com>
Sent: Wednesday, May 18, 2011 7:21  PM
Subject: Re: [TowerTalk] Lexan - Element to mast plate


Hi,  Dave,

The power of the sun over time is incredibly more powerful than a  bullet.

UV degradation occurs to Lexan, degrading optical properties  over time,
however I know of no studies concerning structural integrity due  to UV
exposure, something that makes some acrylics brittle. Beware using  dark
colors, or anything that could raise the temperature. Acrylics tend  to
deteriorate with heat, and Lexan will be deformable at 100 degrees C  -
heating is how they're shaped.
How hot will it be in the hottest day  of the summer in the sunshine where
you live?

Why wouldn't you use  fiberglass, steel or aluminum?

Best of luck whatever you  do!

73,

Mickey N4MB

On Wed, May 18, 2011 at 12:28 PM,  dave arruzza <w1ctn at yahoo.com> wrote:

> To all:
> I have  a good supply of 1/2" bullet resistant Lexan.
>
> Would this  material be suitable for a element to mast plate for a linear
> loaded  shortened 40 meter rotary dipole?
>
> Element length is 24' per  side and the element is constructed from 1-1/4"
> double walled aluminum  for the first piece from the center of the dipole.
> Phillystrand truss  from element midpoint to mast above the dipole center.
>
>  73
> Dave
> W1CTN
> Radio Ansonia
>
>
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--  
Mickey Baker
Fort Lauderdale, FL
"Tell me, and I will listen. Show  me, and I will understand. Involve me, 
and
I will learn." Teton Lakota,  American Indian  Saying.
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