I have a re500 phantom vision. Originally getting about 600 ft video then added external antenna and get about 1200ft. When I try the sunhans amp I loose the connection. I think I am overdriving the amp.
are you positive that the sunhans amp you have is a 2.4ghz? and not a 5.8ghz?
have you tried switching which antenna on the extender that you have the external antennas plugged in to?
When I first moded my range extender I dint get any jump in range at first. useing just a 6dbi antenna. It was as if nothing changed at all.
But It turns out I was hooked to the wrong antenna jack inside. So I was just increasing the range from the extender to my phone thats only a few inches away and wasn't hooked to the receiving antenna that the camera sends to.. But Once I moved it over to the other connector inside the booster my range went a lot further then before.
I got the 5.8Ghz LHCP helical antenna from Taobao. That thing is so bad I had to take it off and replace it with TP-Link omdirection 6db antenna. Not sure if the 5.8Ghz 2W Sunhan is doing anything either.
is that 5.6 set up you are talking about on the control side of things and not the video 2.4ghz side of your set up?
I have not played around with any helicals yet but from what I understand about them is they can boost range but are very directional and you have to stay pointed right at the phantom for them to have long range.
So far the best flight range I have had has been with a cheapo $8 flat 5.8ghz directional antenna on the controller. That got me out to around 1.3 miles and I could of gotten farther if I didnt forget to go in the naza assistant and change my max limit of 2000m I was out at 2200m in atti mode but because I could not see it very well at that point I switched to gps and it backed right to the 2000m mark and just would not go any further. I also have to keep that antenna pointed pretty much right at the phantom to not lose my connection and have it go in to fail safe and start trying to come home.
The 2.4Ghz Sunhan 2.5w amplifier I got from Taobao says 2w on the box and instruction manual but the seller assure me it is 2.5w. Anyway with the clover leaf antenna and sunhan I couldn't see any improvement over the stock extender. My current max range is still less than 300m.
That sounds and looks like a heck of a lot of extra gear to have for no improvement.
Id try just using a 6dbi ommi directional on both the controller and your range extender.
So far thats been my best set up with balancing range but not being to directional. with about .6-.9 miles flight range and about 3500-3800 feet video range most of the time. Tho I have a few times gotten 4800 feet video but had to fly real high and was out in open county with out much to block me.
My flat panel antennas will give me more range but they get real hard to keep pointed right at the phantom to keep a connection so I went back to just mostly using the 6dbi ommi's which I dont have to keep directed right at it as much.
P.S. I blew out my 2.5W Sunhans. I just stop working today. I had an antenuator on (also bought from Taobao).