The fact that you can receive just fine. But, transmit is "1/5", makes me think its more than likely VSWR problem. When was the last time that radio transmitted good? And, did it ever work ok after you installed the GDL 82?
The GDL 82 has nothing to do with your com radio. But, is it possible you disconnected the coax from the com antenna and forgot to hook it up? Or, maybe the coax connecter was damaged while installing the GDL 82?
Mount Vernon, WA
2020 VAF Supporter
Last edited by N804RV : 02-16-2020 at 10:01 AM.