Hi, I enjoyed listening to ATC many years ago until other interests took over, I have now retired so have more time to get back into this hobby, I still have an old Realistic 2006 scanner and would like to construct an simple airband antenna, the one I used and made some years ago measured around 3feet two pieces of copper pipe into a plastic T-piece and connected together with coax cable and erected vertical, problem is I have mislaid the drawing, can anyone help with correct lengths for each of the two copper lengths. I have seen the Q Re: J/pole but feel this antenna is far to big. I have good line of sight and hight of local airport 10 miles.