Tor N4OGW Stated "Also note that the phasing for the cardioid array shown in that report is incorrect. You can't just add a "delay" line of 1/4 wavelength to get 90 degree phasing." and "Two verticals, 1/4 wave spacing, 90 degrees out of phase." withour any explanaiton. Please explain Tor. It has worked for me. Thanks Bill W7VP