wrote:
In an earlier post I stated that it looked like the real part of the
antenna impedance needed to be less than 50 ohms to get a perfect
match, using this method.

EZNEC comes with VERT1.EZ, a 40m vertical. I just ran it
at 19 MHz and EZNEC reports a 50-j160 ohm feedpoint impedance
with a maximum gain of 2.23 dBi and a TOA of 16 deg. Seems all
that is needed for matching to 50 ohms is a series base coil.
--
73, Cecil http://www.qsl.net/w5dxp

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Cecil Moore wrote:
wrote:
In an earlier post I stated that it looked like the real part of
the
antenna impedance needed to be less than 50 ohms to get a perfect
match, using this method.

Maybe it's the same as the parallel tuning coil installed
at the base of a 75m mobile antenna which has a real part
equal to 12-25 ohms (depending on the quality of the antenna).
--
73, Cecil http://www.qsl.net/w5dxp

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If you use an "L" network consisting of two inductors as a matching
device, the R must be less than 50 ohms. I was incorrectly modeling
the tapped coil as a two inductor "L" network.
Gary N4AST