Hi guys, I want to fly my P4 in the winter, where I am in my basement. The problem is that the signal in the basement is extremely week and I cannot follow my FPV when my bird is far away more than 500m. So I am thinking to put a transmission line between my transmitter (controller) and the antennas. I can put the antennas upstairs. The distance between the stairs is around 25 meter. and my question is Have anyone done this before? What type of coaxial cable should I use? What are my options? Should I do it for both antennas or is it enough to do it with only one of the two antennas?