My antenna is a hexagon single loop, 530 feet long. That is 88 feet on each (of the six) sides. I do have a little more room than most - and when I get a chance I will add a second loop in another direction. Oh and I do have the 1965 foot "L" long wire, 1350 feet North to South and 615 feet from West to East: the upper wire of my fence. I do not have it insulated from the posts. But I do not yet have the SDR, although that should be long enough for AM band reception.