Initial SWR Graphs for a 2-element SteppIR Yagi mounted at 35′ pointing due North taken 10/23/2012 using a RigExpert AA-54 analyzer and AntScope software.
Element spacing is 72″. Antenna was tuned using CREATE/MODIFY in the controller. Graphs shown here are for 10, 15 & 20 meters. 12 & 17 meter graphs will be added at a later date. With the antenna pointing due North, there may be some interaction with 40M & 80M inverted vees off the other tower.