I am building a 1/4 wave vertical for 30 and 40 meters with a coax trap. In order to do the initial measurements, can anyone tell me if the 30 meter length includes the trap or if the 30 meter length stops at the bottom of the trap or in the center of the trap? Dan Schaaf K3ZXL "In the Beginning there was Spark Gap" www.k3zxl.com