Use the attached Excel spreadsheet to calculate what lengths to avoid when puting up a long wire. This spread sheet was made by W4TME for the Icom AH-4 tuner. Antenna theory is Antenna Theory so this will work for any antenna tuner. Just read the directions and DO NOT USE THE LENGHTS LISTED IN GREY WHITE AND RED THOSE ARE THE AVOIDED LENGTHS, USE THE "WIRE WINDOWS" ON THE CHART!