for my next antenna project I'm doing 5/8 wave ground plane , my design uses aproximatly 21 foot driven element with four 1/4 wave 102" radials set at 45° , unlike my current homebrew 1/4 wave ground plane the new one will require some kind of matching transformer, I have seen some balancers made with coils of wire and some using a capacitor along with coils of wire, buying a balun is not out of the question, I would like to be able to make my own if I could understand it better.
