.....and how long can you keep it aloft? It can't be long enough to be worth the trouble.My question would be......if you take scanner with antenna attached up to a certain altitude....how are you going to hear it unless you broadcast it somehow (Bluetooth??) although that has limited range. If you take just the antenna up......need coax to feed from antenna to scanner on ground. The longer (read higher) the coax run...the greater the signal loss would be so you may reach a point of diminishing returns.