Bob, you will get tons of opinions.. From my experiments in investigating 160
radials, do not mix elevated and grounded radials... If one radial is up, keep
em all up - or all down as the case may be...
The other point on elevated radials is that the coax should not be grounded
either, including back at the radio - and this point is missed by the published
authors I have read...... When Christman, and others have done an analysis by
NEC engine they 'apparently' have overlooked the fact that their engine assumes
an ungrounded antenna is ungrounded everywhere - I have not discussed this with
Christman or with Cebik, or others who actually understand the NEC engine <I
don't>, so it may be a bad assumption on my part but is a thought I have
carried around in my head...
For my later elevated radial tests I went to a link coupled tuner at one point
<which left that antenna/radials isolated from ground> and thought I could see
a small difference in favor of the antenna with the tuner versus the one
without... How much of a contribution the extra tuned circuit played in that
small difference, I don't know... I didn't carry forward with that in a
rigorous comparison test, and it is an item on the project list in my head for
the future - if I live long enough to work my way down the list to it...
denny / k8do
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