DX ENGINEERING

Amateur radio antennas, namely, high performance, long distance antennas using HF, VHF or UHF frequency bands to obtain optimum gain through control of take-off angle, voltage standing wave ratio and antenna pattern; antenna parts therefor, namely, parasitic and all-driven arrays, Yagi stacking switches and vertical antenna array combinations which allow instant directional switching and simultaneous coverage of two paths; and antenna peripherals, namely, Yagi phase boxes, vertical phase boxes, side mount phase boxes and remote coaxial antenna switches; time variable sequence units; active receive antennas with internal antenna disconnect relays; current baluns and feedline current chokes; reversible beverage antennas, and noise canceling controllers