Turnigy 9x Range Booster

This is designed for Turnigy 9x, but it can be used also on other transmitters where is round antenna.
Bottom hole is ø9,5mm and top hole is ø8mm.

Cover the front side of booster with aluminum or copper foil tape.
I used 0.5mm thick polished aluminum plate.

I have not tested how much this improves the range, but I have flown with this a 500-1000m distance without any problems. Without this booster, when flying at 1000 meters distance, need to be perfect conditions.

Range testing at yo