Hi,
I fly DJI 550 with 35 Mhz Futaba transmitter and a 5.8 GHz FPV setup. I tested the video range this weekend and could only go as far as 450m before the 550 went into fail-safe. So it wasn't the video that went out first it was the Futaba. I tested it a couple of times and every time around the 450m mark.
The FPV setup is a gorpo connected to the DJI 500mW Tx. The seniors at het flying club said that the "strong" 500mW Tx would block out the signals to the Futuba Rx.
Any info would be a great help.
Greetings,
Chris