Keith wrote:
"And do remember, we are discussing the GENERAL case here which includes
transmission lines with complex impedances."

This is a radio amateur antenna newsgroup. The lines used with these
antennas is a special case in which losses in feedlines are usually so
low that Zo does not differ from Ro.

Great simplification results from a surge impedance which equals sq. rt.
L/C.

Many still question what happens in the simplified equivalent circuit of
a lossless line. Once the simplified line action is understood it will
be rewarding to discuss the general case. Keith has repeatedly
demenstrated a desire to treat r-f feedlines as d-c wires. That won`t
work.

Best regards, Richard Harrison, KB5WZI