I have a blind friend who can't put anything outside, and is restricted to antennas near the window in his apartment. Luckily he lives closer to the top, which helps with range a little bit. He has a VoIP linked repeater at his apartment and while I was range testing, I had little success getting in to it from anywhere greater than a mile from the apartment.
Currently, he has a 5/8*5/8 magmount 70cm antenna on some copper strips on the windowsill but I wouldn't think that is a very good ground plane. I am thinking of building an antenna for him to attempt to improve performance for his apartment repeater, I am thinking about wire antennas I could hang up or something. Does anybody have any suggestions?