Interference 433mhz SiK Radio and FrSky R9

Hi guys,

i am currently running the FrSky R9 and a R9MX receiver (868mhz EU frequency) paired with a 433mhz SiK Radio for telemetry on my Skywalker X5. However, I get a very short range on both devices and a “rssi low” warning when the distance between radio and receiver is farther than about 20 meters. When I only test one unit at a time, the range is normal. Is this a known issue?


433x2=866 almost 868, so harmonics are a pain…

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That’s what I was thinking of as well. Looks like I need to use a 2.4ghz receiver.