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All of my yagi designs feature 50-Ohm direct feed for maximum efficiency.
The 144MHz designs detailed here require 5/8 Inch (15.8750mm) OD tube for the DE and 3/16 Inch (4.7625mm) OD rod for the parasitic elements.
ALL DIMENSIONS ARE FREE-SPACE SO ELEMENTS NEED TO BE INSULATED FROM AND RAISED SUFFICIENTLY HIGH ABOVE THE BOOM TO AVOID BOOM CORRECTION AS PER DL6WU MOUNTING DIRECTIVE! I.E. RAISED MORE THAN THE BOOM RADIUS (r) ABOVE THE BOOM...
LOW Q LONG YAGIS
FLOWA's
