Hi Dick,
I experimented with "long" (well, in terms of wavelength still very
short) radials at the club station, to increase the antenna current
while keeping the transmitter power constant. Result:
When I *only* use the AC mains as ground, the antenna current was a bit
higher than when additional radials were connected (in parallel with the
AC earth line). So, in my case, the radials were not worth the effort.
But things may be different when the antenna is smaller : Read the
comments about the "footprint" theory mentioned earlier. If you have the
chance to use the electricity system, or even better a cold water pipe
as ground system, better put the wire up in the air to increase the
footprint.
My antenna (at DK4U / DF0WD, which is the same) has the footprint of a
football field :o) but it's only above 10 meters above ground in
average, and very lossy because it is steel wire ("NATO telephone
cable", cheap but very rigid) .
Best regards,
Wolf .
Dick schrieb:
Anyone knows if it makes sence to use some long radials 100-300m long
in combination with a spiral-coil toploaded vertical with 4x20m
toploading wires.
Or is this just wasting time and wire......
Dick, pa4vhf
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