Do the external antennas on the H help increase the range if you have the fpvlr
One can easy install better antennae on the H and the ST-16, many vids about that.
Trying to fly as far out as possible will result in you posing yourself outside the law and insurance because you willingly put people and property in danger. You only know you can not go further if communication is getting lost. Thus you have no idea what you or the H are doing. Besides, if you have installed the best antenna in the world the H will probably not carry enough power to get back home.
Cheers!