TopBand: Balloon suspended 1/2 wave vertical on 160

[Earl W Cunningham]

On Fri, 10 Apr 1998 12:39:16 -0700 (PDT) David Feldman <dgf@netcom.com>
writes:
>Would this be re-inventing the wheel? I'm interested in 80 and 160M
>vertical solutions that would not depend on radials; it seems 1/2
>wave would work at first blush. Any thoughts?
>73 Dave WB0GAZ dgf@netcom.com
=============
Any elevated or ground-mounted vertical will require radials unless it is
a half-wave center fed vertical.  Of course, there are other
vertically-polarized antennas for 160 or 80m that don't require as high
of a support nor radials -- such as the delta loop, quad loop, etc.

Another idea is the elevated "T" (1/4-wave vertical section attached at
the top to the center of a 1/2-wave horizontal section) fed at the top of
the vertical section.  This, of course, is an upside-down vertical with
two radials which has the advantage of having the high current part the
antenna at the top, but still needs a pretty tall support.

Another thought is the K5RP so-called "magnetic radiator" (which actually
radiates predominently electric fields like just about all other
antennas) described in the ARRL Antenna Compendium, Volume 2.  This
actually a two-wavelength rectangular loop folded back on itself.  A
one-wavelength loop of the same length/height dimensions would radiate
equally well (with 1/4 of the feed point R).

73, de Earl, K6SE


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