So I thought this might help out a few people.
I have a Contixo F24 pro (this model also is label by other manufacturers ) ie DEERC
This drone has a 2.4 ghz operating system but a 5 ghz video system.
The issue was that I would lose video wifi at about 275 to 300 YARDS. Without video at that distance, it is really hard to operate a drone.
plugged it to a usb power pack and mounted on a conduit pole.
It was easy to set up and even with the tall corn obstructing the view, I could push out to 425 to 450 yards. At that point I would lose the 2.4 operating system, but still had video.
Just thought I'd let you know about a solution that really works well.
First pic is in a drainage ditch at 525 meters from controller and about 2 meter from ground. The second pic is from the same location at 30 meters high. I am sitting on a deck at the house in the center of the picture.
After some more playing today, the limit seems to be at about 600 meters if I keep it off the ground about 5 meters.