In article ,
says...

On Fri, 13 Feb 2004 10:41:01 -0500, Bob Schreibmaier
wrote:
It all depends how you tune the yagi. For example,
a two-element yagi with about 0.2 wavelength spacing,
with a reflector approximately 5% longer than the
driven element will offer a very good match to
50-ohm coax (according to EZNEC). Costs only a few
tenths of a dB in forward gain to get that match.
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Ok, maybe so, but a two-element yagi is a waste of time in my book. If
you're going to that much trouble to build one, add a third element and
get a little more pizzaz.

Perhaps, but this, too, may be tuned for a very good
match to 50-ohm coax at only a small sacrifice in
forward gain. You are probably aware that Force 12
does exactly this. And, of course, the Mosley TA-series
tribanders that have been on the market for some 45
years have direct 50-ohm feed with a very good match.

73,
Bob
K3PH

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