Here in VK land, the sun shines pretty well as much as anywhere I think, and with plenty UV radiation too.
the various "Poly" ropes commonly sold, last only a few weeks when used as halliards etc. Nylon virtually lasts indefinitely - ten years in my experience and it still seems good. Dacron is the same stuff as Terylene to the best of my knowledge respectively USA/UK names. I have experience with Terylene boat sails, that seems to have a very long life. Not sure of it's relation to Nylon, but I suspect very close. I also have some WW2 antenna guys, made of I am sure some greenish colored natural fibres with a woven outer "tube" layer over the inner, these were available surplus in the 60's in a Can (opened by a tin opener!) Some have been in use here for several years and although showing deterioration, are still quite strong. David VK3DBD On Thu, May 13, 2010 at 9:03 AM, Tom W8JI <[email protected]> wrote: > The dissipation factor of Nylon is about two orders of > magnitude greater than polyethylene and the UV resistance is > horrible. > > Wes N7Ws>> > > None of that may matter because the electric field strength > in the insulator is probably low and almost all nylon has UV > inhibitors now. > > The rope I use for antennas is nylon and it lasts a very > long time in the Georgia sun. > > You have to look at the material characteristics of the > particular nylon material for UV life, and the end > application for dissipation factor problems. Even 100 times > nothing might still be considered nothing. > > 73 Tom > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
