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>X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) >Date: Tue, 24 Oct 2000 08:44:48 -0400 >To: "tower talk" <towertalk@contesting.com> >From: Pete Smith <n4zr@contesting.com> >Subject: Re: [TowerTalk] Florida Ham fights UV - uses tape??????????? >Sender: owner-towertalk@contesting.com >X-Sponsor: W4AN, KM3T, N5KO & AD1C > >At 08:15 AM 10/24/00 -0400, James White wrote: >...>I have seen gray pvc used for electrical conduit versus the white used for >>plumbing applications...the gray stuff in Home Depot is marked UV >>resistant...would it be better to go with UV resistant PVC or use F12's >>suggestion of simply quenching the UV by taping over the PVC? >> >>Taping over is easy enough to do but not very "professional" - I try to >>design our antennas so they can stay up for a sunspot cycle if at all >>possible...even if I coat the tape with scotchcoat this is crude at best and >>if the same results could be obtained by switching out the PVC I would >>prefer that... > >I'm a little skeptical of the gray stuff, if it is chemically similar to >the gray insulation used on UF-B electrical wire. After 3 years in my >decidedly less-fierce UV environment, exposed UF-B is definitely changing >chemically -- the color has yellowed and there are minute blisters all over >the surface. I'm suspicious that the insulation is getting brittle, and >may start to crack where flexed, in a year or two more. Same thing has >happened to a gray PVC electrical box that I use to switch my tower-mounted >80-meter array. > >By contrast, taped PVC insulators on one of my C-3s show no signs of >deterioration over 6 years' time, so I'd say tape 'em neatly, forget the >Scotch-kote (which isn't UV-resistant anyway), and enjoy. > >73, Pete Smith N4ZR > >Contesting is ... Extreme Radio > >The World Contest Station Database >is back up and running at >http://www.qsl.net/n4zr > > > >-- >FAQ on WWW: http://www.contesting.com/FAQ/towertalk >Submissions: towertalk@contesting.com >Administrative requests: towertalk-REQUEST@contesting.com >Problems: owner-towertalk@contesting.com > > 73, Pete Smith N4ZR Contesting is ... Extreme Radio The World Contest Station Database is back up and running at http://www.qsl.net/n4zr -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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