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- #21
I had a sneaking suspicion that the firmware would have to be changed by FlySky to activate the 2nd port.I just discovered that my second IPEX port is not sending a signal, or at least not the same signal. When I connect my booster to the second port, my range is unaffected. When I connect the booster to the first port, I get a >10db gain over the stock antenna. During this test, my FGr4S equipped K6S was across the garage. This wasn’t any long range setup. Signal on the display of the NB4 went from -60 to below -50, usually around -47 to -44. So if you are boosting your NB4, I would highly suggest using the first port and not the second.