All, Here are a couple of more tech notes on the topics of Antenna Control and Traming large antennas. Go to www.ab5k.net and click on the following links in the left nav-bar. Ant Controller and/or Dual Tram. 73 Terry - AB5K Web: www.ab5k.net AR-Cluster: dxc.ab5k.net and dxc-us.ab5k.net