I have two handhelds and an intercom which I use in an aircraft that does not have an electric system. All of the components work well with each other except that I have no way of switching the IC connections from one radio to another except for transfer of cables. This should be the simplest of problems except that I have been unable not to identify a switch part which will handle the two conductor EAR and three conductor MIC outputs of the IC with single actuation manual operation. The audio quality of the signals when cabled is fine. Thus no requirement for amplifiers/filters/sharing circuits etc. such as found in typical NAV/COM PANELS. Has anyone here solved this problem ? Any suggestions appreciated.