After three months of research and asking questions, all I have found out about my radio problems is that it is a common problem with evidently no concrete solution. No help from Vertex Standard or I-Com. They sell handheld radios with headset adaptors and VOR navigation but they are useless in regards to transmitting (therefore useless in flight) if you are using an headset , intercom and external PTT switch. There is RF feedback so terrible no one can understand you. No amount of ferrite beads, loops in the coax, or external antennas has helped.
I know there must be fellow Aeronca Chief/Champ pilots out there with usable radios. I would like to know what those radios are. I can't complete my flight training if I can't communicate. Any help would be greatly appreciated. I have an earlier post under my name explaining the problem with the radios, so I won't go into it here. HELP