crxcte Posted February 7, 2016 Report Posted February 7, 2016 Needs some help checking an intermittent PTT failure. My configuration is a Narco CP 136 Audio panel, Com 1 is a 430W, Com 2 is a Garmin GNC 250 Nav/Com. My question is on the audio panel has one Mic Jack Key in, does both Coms feed the the same Mic Jack Key in? Com1 I have Mic Key In tied to Com2 Transmit Interlock then an isloation diode before connected to the Audio Mic Key In Com2, I have Mic Key In tied to Com1 Transmit Interlock then an isloation diode before connected to the Audio Mic Key In
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