I have been using balanced line for years to feed various antenna configurations here at the station. Originally, with lighter power handling requirements, I used the 450 Ohm #14 "window line" which sort of works but at a tremendous cost due to the marginal dielectric and its cross section to conductor ratio. That resulted in tremendous swings in matching because of rain, whipping around in the wind, and even heating in the sun. I started to construct and experiment with the construction of open-wire line using various insulators. The BEST (and traditional) of course would be of the ceramic spacer variety, and in a situation where rigid supports (like towers) are used with minimal sway in wind, that would be ideal. The ceramic insulators I used are HEAVY coupled with the weight of the wire itself and can significantly pull on the center support of an antenna. In my case, (using #10 wire) with VERY tall trees used as antenna supports, weight and antenna sway was indeed an issue. In researching various workarounds online, 8 years ago or so I discovered this video: https://www.youtube.com/watch?v=qzFKGB6qkXs Ok, "PENS" ??? Hammy Hambone at it's finest! Interesting.. BUT.. They are NOT UV resistant! Those pen "insulators" will crumble after one season and look like a play toy your dog Rufus used to CHEW. (just ask THIS Hambone how I know). The other and equally important caveat is the type of cable ties used to affix the wire. The run of the mill Home Depot or Lowes Chinese-made variety are rated at "80 Lbs". In truth, the quality and composition of the wraps are suspect. So I did some tie-wrap-research "TWR" online and it seems as though the ONLY way to go isn't for tensile strength but for AMERICAN made UV stabilized "NYLON 6/6, ISO9002 CERTIFIED". What was happening with the Home Depot type was that every other one would break because of the inability to make the severe bends around the wire itself (securing it against the insulator). Flexibility and real UV ratings are KEY here, and US made cable ties are the only way to go. The "pen insulator" video IDEA has merits if different insulators and cable ties are used. The trend for replacement insulators has been "Fi Shock Fence insulators" (4" spacing): http://www.zarebasystems.com/zareba-4-inch-fin-tube-insulator-ht4fti200 You will notice that they are 4" spacing, and have what appears to be "ribs" of plastic that could catch snow, water, etc. Here is a great link to constructing open wire utilizing the "Fi Shock" (but with slotted ends and hot glue minus the cable ties): http://www.w1aex.com/owl/owl.html Several years ago, I decided to use the US made cable tie and fence insulator approach using these: http://www.rammfence.com/fence/horse-fencing-accessories/electric-fence-accessories/insulators/5-inch-insulator-tubing These are 5" spaced, rigid, UV resistant, and EXCELLENT for open wire insulators! The 5" spacing using #10 wire = characteristic (Zo) 560 ohms. I constructed about 175 FT of open wire using just the cable ties and these insulators. So far, there are absolutely NO signs of degradation of either the cable ties or the insulators. The antenna I am feeding is up at 95 FT and certainly has some sway in the wind.. It seems as though I can expect some good longevity from this feed line! Rolling your OWN open wire line is one of the best ways to improve the consistency of any balanced antenna installation. I'm interested how you folks have rolled your own!