"Cecil Moore" wrote in message
. ..
Jeff wrote:
w5dxp wrote:
The Z0 of the transmission line has not changed to 100
ohms so normalizing the chart to 100 ohms is not valid.

It is just as valid as using 50 ohms, and the result is the same, a
changing vswr.

No, the center of the Smith Chart is the Z0 of the transmission
line (when used on a transmission line). One cannot willy nilly
change the reference Z0. The confusion from doing such is obvious.

You are mis-representing what I said; which was that you can plot the
problem using with the chart normalized to EITHER 50 or 100 ohms (the
impedance of the generator or that of the line) and the net result will be
the same answer.

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.

Jeff