What is the legal distance from a communications tower in the US? If you are aware of the rules regarding drone clearance from a radio tower, I'd like to know. I found this on a DJI forum:
"Until you bump into it. Generally most radio towers, especially communications, broadcast radio or TV will have no effect on the Phantom until you bump into it or a guy wire. There are some terrestrial telephone repeater towers that operate in the microwave C-band which includes the 5.4-5.8 GHz band for IEEE 802.11a Wi-Fi. These are the ones with the antennas that look like big bass drums or strange horns and they could cause you a problem if you fly through the beam."
So the 600mw VTX mod is good to 1500 meters so far!