The longwire in the attic is about 50 feet long, maybe 60, as it zig-zags back and forth all the way from the front of the attic to the back. It's a long house, but I'm not sure how long it is up there. I have a sloper outside, and it's still working OK, but the coax is starting to show it's age (about 10 years) and it will either get new coax, or it will be replaced entirely. I have a slinky dipole all set to go if I retire it. I had a slinky longwire years ago, with several soldered together (They solder really easy), and stretched out on a rope. I had to shorten it up, as it was so potent the nearby AM station was overloading all my receivers, even with a tuner and attenuation on. Once I got it cut down to about 2 slinkys, about 50', it was a great antenna, especially for the 5 bucks two slinkys cost back then. I fed it with RG6, and it lasted over 10 years before it finally came apart from old age. I tried out the slinky dipole inside the house and it seemed to work very well, and seems to be decently made.