Buck wrote:
I tried it again and got the picture. It appears that the 450 ohm
twin lead sections can match any impedance between 20 and 100 ohms
given the proper length.

Not only them, but *any* impedance that causes a 450 ohm
SWR between 4.5:1 and 18:1. That's an infinite number of
impedances (every impedance within the green area) and includes
virtually all the actual impedances encountered when the dipole
is 1/2WL on the lowest frequency of operation. For instance,
the feedpoint impedance of an 80m dipole usually falls into this
green range when used on 40m (and any other HF band) even though
the feedpoint impedance might be 5000 ohms on 40m.
--
73, Cecil http://www.qsl.net/w5dxp


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