Cecil Moore wrote:

Jim Kelley wrote:

There can exist no real point where the characteristic line impedance is
both 50 ohms and 150 ohms.

I agree, and using the same logic, there also can be no such thing as real
steady-state conditions. That doesn't keep us from using it as a real concept.

No, but it made it difficult for me to anticipate every possible
observation you might want to make about what goes on at such a point.

73, Jim