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Old October 1st 07, 06:47 PM posted to rec.radio.amateur.antenna
Richard Fry Richard Fry is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 440
Default what homebrew HF antenna produces the most groundwave?

"K7ITM" wrote
I suppose that MW AM broadcasters are unlikely to use a
vertical collinear, but maybe one of the other contributors
with lots of broadcast antenna experience could comment
on that.

___________

Almost all US AM broadcast stations use non-sectionalized vertical
monopoles, but a few use a form of the Franklin antenna comprised
of two collinear, end-fed verticals.

The current thought on this in broadcast circles is that the additional
h-plane gain that provides over a 195-degree non-sectionalized
monopole isn't worth the initial cost and the continuing need to check
and adjust the power division and phasing between the sections of
a Franklin.

RF