The purpose of grounding both ends was to try and duplicate some of the
"Earth Bipole" experiments conducted earlier (and good results obtained)
by John Taylor G0AKN.
Both ends grounded means that there is no huge voltage gradient on the
line, something to watch for as we have hung the line from one tree to
another, through a forest.
We have enough space at that location to try all sorts of other antenna
configurations; this is just the first one we have tried, and since we
were heard (loud and clear) in London Ontario, that is probably proof that
whatever happens in that antenna is pretty good :-) (see for instance
http://www.armrad.org/projects/lf )
73
Andre' N4ICK
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James Moritz wrote:
I was interested in the AMRAD beacon WA2TXF/12 and it's 1600ft
"earth bipole" antenna - what is the benefit of grounding both ends
of the antenna, rather than tuning it up as a 1/4 wave, as OH1TN
seems to be doing rather successfully?
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