You keep adding to it Regardless, as I noted the mike drives several transmitters through a switch box. Total mike cable length can approach 10 feet, depending on the radio. The board serves several purposes, First, it provides a 6 meg load for the element, and a buffer to driver lower impedance loads. I do not know how much simpler I can explain things to you?? Regardless, there were issues with that product that others have also experienced.