I put up plenty of copper wire antennas that stayed for quite a few years with no noticeable sag, but they didn't have to support heavy coax either. Then if you want an 80M dipole that'll make a good perch for a family of condors you can do it for 60 buckaroos, 10ga CopperWeld (copper clad steel) from here: http://www.amateurradiosupplies.com/category-s/260.htm
So Kel, you pulled wire out of old transformers, I put wire into new transformers. Being a technician I hired on for testing, when I fouled everything up in winding they realized their mistake and put me where I belonged. (;->) Oh yeah, broadcasting IS a gold mine, I knew engineers for several stations who used me to clean out the shops and transmitter buildings. I used lots of really big inductors and air variable caps making 10KW ATUs among other impressive looking stuff, ALMOST used the 4-400As, 4X500s and some big-ass transformers for something I'd rather not talk about, and one engineer gave me this I used for a smaller version of the thing I'd rather not talk about. (;->)