[TowerTalk] Lexan and element linkage

[Guy Olinger, K2AV]

I note that this method is used to hold the C31XR's 15 and 20 DE's apart in the
single feedline configuration. We've only had one winter with any number of
these out here. Has anyone gone through significant ice with a C31 yet?

My own guess on the method used is that even if the hose clamps are tight, that
significant force could cause the 15 meter element to rotate below the 20
somewhat to equalize stress. Although this might look funny, the beam would
still function.

- - . . .   . . . - -     .   . . .     - - .   . - . .

73, Guy
k2av@contesting.com
Apex, NC, USA

----- Original Message -----
From: L. B. Cebik <cebik@utkux.utcc.utk.edu>
To: <towertalk@contesting.com>
Sent: Tuesday, October 19, 1999 10:33 PM
Subject: [TowerTalk] Lexan and element linkage



On a home improvement show, I saw/heard reference to the use of Lexan as a
window pane material in Florida as a shatter-resistant material for
hurricane-prone areas.

1.  I wonder if this application of the material would have the good RF
and physical properties of Lexan sheet in general.

2.  Is the material readily available--and, if so, through what sources?

As a side note following the discussion of holding C3 elements at a
constant spacing, I wonder if it would be better (or not) to use a system
that pinned the spacer only to the longer/larger element, letting the
smaller element slide in a slot or hole.  Locking both elements to the
spacer may create a rigid rectangle which would alter the element
flexibilities.  However, not sure that this would make a significant
difference in element durability for either or both.

-73-

LB, W4RNL



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