Jeff wrote:
The chart does not necessarily be normalized to the impedance of a
transmission line that you are trying add, otherwise you would never be able
to include a series line of an impedance other than that of the chart in a
matching network.

The point is that it is best to use one Smith Chart
for each Z0. Trying to plot multiple Z0's on the
same chart leads to the present confusion. The
fact that a piece of transmission line with an
SWR1 transforms impedances is NOT proof that
the SWR is changing. It is *only* proof the
the impedance is changing and that happens
with constant SWR.
--
73, Cecil, http://www.qsl.net/w5dxp