Tuesday, 26 May 2009
Vertical half-wave aerials for 4m
I have a Wouxun handheld for four metres which I use for Summits on the Air activations. While talking to Ros G6GVI on 23cms he pointed me to his design for a vertical half-wave aerial for 4m on the Four Metre Website. http://www.70mhz.org/halfwav.htm I have made one and it works at least as good as the half wave Watson I have up at home. Others have had success with J-Poles and Slim Jim antennas made from ribbon cable, but there seems to be a wide variation in the measurements dependent on the cable. I have made J-poles and Slim Jims for two metres successfully in the past but I had no luck with the one for 70mHz.