thats not your only problem....... a blown fuse means you had a short circuit some where, yes fuses can get old, but you probably had a short. a wire that comes loose is an open circuit. fuses dont protect opens. the only other possibility is reflective power from the loose antenna wire but to be on the safe side id call JR and see what circuit the fuse is on before i use the transmitter again. even if the loose wire touched something an antenna is a load just as a short would be