I am setting up a balloon vertical (136 ft. radiator) with a feedpoint at 30
feet above ground and 4 radials about 60-foot long each. I'd like to do
something at the feedpoint to transform the 56-j115 impedance (modelled) for
50-ohm coax feed. Is there a simple L-network calculator anyone has used? Or
is there a better way alltogether to do it? I did notice in modelling if I
lengthen the radiator to 152 feet I can get a feedpoint Z around 75+j0, but
still needing some sort of matching device. Any tips? More and/or longer
radials? I could probably go out to 80 or 90 feet on the radials if I really
had to.
Steve, KK7UV
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