John,
I work for a parking meter company and the domes in the parking meters are
Lexan. As I recall the injection molder adds UV inhibitor to the basic
material. After about 5 years they may start to turn a little yellow, but
hold up for a long time structurally. I would investigate to see whether
the particular stuff you have gotten has had anything added for UV
protection. I think if it has not, it may not hold up the way you would
want.
Stan, K5GO
----- Original Message -----
From: "W0UN--Signal Hill Ranch" <shr@ricc.net>
To: <towertalk@contesting.com>
Sent: Thursday, May 31, 2001 11:34 AM
Subject: [TowerTalk] Lexan
> My wife brought home some scrap sheets of Lexan
> from work for making antenna parts. (Love a woman
> who understands my NEEDS!)
>
> Hope to use this stuff for the insulated mountings for
> the matching networks and connectors for VHF and UHF
> Yagis.
>
> Just wonder what experience anyone has with the
> UV-resistance of Lexan. This is 3/16 inch sheet
> and is clear. Mechanically it will be fine--just don't
> want to have to replace it in a few years from UV
> degradation.
>
> BTW She also brought me a 12 x 12 inch by 1 inch
> thick sheet of Teflon. Have used Teflon before on some
> old W0EYE/Viezbicke/NBS688 Yagis and it has worked
> well for that design--but wanting to try some alternate
> mechanical designs and this Lexan looks promising.
>
> Appreciate any insights/experiences on clear Lexan.
>
> Thanks.
>
> 73--John W0UN
>
>
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