The rigging you describe is almost exactly what I am planning. I can replace broken 14 AWG THHN 3 times for the price diff... IF it breaks... and I will simply use a non-stretching down-line on the tension weight and monitor its descent toward the ground to determine if and when to trim the loop back and re-terminate.
I'd use that snazzy, 30% copper over steel stuff if I didn't have the system/access to maintain/replace the loop and I needed it to stay put for years and years... the insulation vs. bare wire has some measurable impact on radiation characteristics, but at this point, I'll just get a loop in the air so I can get on the air when I finish assembling and testing my K3s. Thank you and ALL of y'all for y'alls help and opinions, et al. I have lots of new information and docs to read/study. :-) ______________________ Clay Autery KG5LKV (318) 518-1389 On 2/10/2016 3:59 PM, Ron D'Eau Claire wrote: > That support rope Jim referenced has done a great job here for a number of > years supporting wire antennas over 100 feet long hung in tall fir trees. I > did provide strain relief - a pulley at one end attached to a weight so the > tree can move freely. We do get winds gusting over 60 mph here most winters > and the rope has handled the shock load of the tree whipping and jerking on > a 20 lb weight. > > The wire I use is hard drawn stranded copper. I purchased mine through Ham > Radio Outlet back when I lived near one of their stores. It is also on line > at: > http://www.hamradio.com/detail.cfm?pid=71-001462 > > 73, Ron AC7AC > > > > -----Original Message----- > Pulleys yes. Cord at a marine store will be expensive. Here's a link to the > company that makes great antenna rope that is resold by several large ham > vendors. 3/16-in is enough for strength, but 5/16-in is easier to grip if > you need to pull it to put a lot of tension on it. > > http://www.synthetictextilesinc.com/supportham.html > >> I would recommend using hard drawn copper for the wire rather than >> THHN. You can find THHN at your local DIY store. For hard drawn >> copper, look at The Wireman www.thewireman.com. > > 73, Jim K9YC > > > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
