We have been using the MX-20 in several jets and giants here in Brazil, no issues so far at all, on FPV I got 4km range on the stock system (MX-20) in an urban area. One of the guys flying with us reported that his MX-20 lost about 80% signal when a Turnigy (cheap Hobbyking) 9X was turned on. He tried with several others of the same type and same result, I will test a few MX-20's we have here with those radios to check this out.

Has anyone experience similar issues?