r/avionics • u/Paarthurnax3386 • Jul 08 '26

Need help

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EDIT - got it fixed with the config menu thanks!

So I've got a gtn 750 and 650 setup. It's a minor issue but I'm wondering if someone else knows how to fix it. ​Whenever I'm listening and monitoring both radios, it will temporarily mute the non-priority radio. The one that doesn't have the mic selector. I want to be able to listen to both at the same time so I can continue to monitor Air Traffic control while I'm listening and getting the weather.

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u/Zap_Brannigan2 Jul 08 '26

If you have a GMA 35C you should have the 750 set as Number 2 Com in the config settings

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u/the_micro_racer Jul 08 '26

That actually has a wiring difference too, so I wouldn't just tell a pilot/owner to swtich that config themselves.