Have not been in a SE so can't say about those .So dirkclod, the itelite's look good, I am curious though, with many of those I see 3 connectors (screw on type), I have a P3 SE and it only has one antenna.
itelite does have an option for mine and that also has the 3 connectors, but it also has the thinner wires to do a mod. I assume that is the only way on my model? I hesitate with that. And from what Ive read, as Rodger stated, they are directional (very much so), how has your experience been? Do they need to be pointed directly at the quad?
Parabolic antenna boosters, AKA Windsurfers are the cheapest easiest way to more than double your range. Yes, you have to be aware of how directional they are; point 'em where the bird flies. Sounds easy enough but when the bird is overhead you'll have to contort and get 'em aimed up - makes seeing the screen tricky and could necessitate a neck massage post flight.
Years ago on one of my first flights I lost connection to the drone and was freaking out. I thought DJI had sold me a lemon but found out it was pilot error. I was directly overhead with the antennas pointing forward instead of up. Another flight where I was mapping a property, the drone landed prematurely due to lost connection. Same problem, not pointing the antennas at the drone. I thought autonomous flight meant I could take a nap and the program would wake me up when it was completed
I use them and they do work. Mine appear to be copper and it is always better to focus the signal than waste half beaming back to and behind you.
While I do get better range, remember that these are simply parabolic and not signal booster / amplifiers. Temper expectations.
Never found anything that lasts as long or has outperformed the Intelite. Have them on my phantoms and yuneec. The mavic pro and inspire 2 don't need them.
Thanks everyone for all of your valuable input, I really appreciate it! I think Ill try a parabolic one first and go from there. The price is surely right.