I have heard these arguments before about delta loops on the
low bands (one of my DXing buddies at work keeps telling me
the same thing about our 75M delta loop), but aren't we
forgetting that you don't get something for nothing? If the vertically
polarized delta loop is essentially equivalent to phase verticals, than
why should it function any better than a phase array of two low
ground planes with a few elevated radials? Seems to me that the
vertically polarized delta loop would benefit greatly from a conducting
ground screen underneath each of the vertical sections (e.g. radial
system). Also along these same lines wouldn't the vertically polarized
delta loop be subject to the same modeling errors as are alleged
to plague ground planes with a sparse number of low elevated
radials (measured vs modeled debate)?
If it were up to me, I would consider putting some radials underneath
the delta loop to improve efficiency.
Mike, W4EF.....................
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