Jim Kelley wrote:
Cecil Moore wrote:
I suspect that all necessary reflections take place
at the impedance discontinuity and the characteristic impedance
is established immediately.

Cecil - you might like this. What I got out of Feynman's QED was
that the probability for a reflection to take place would be
highest at the discontinuity.

Even better. It is known to take a few radii to clearly
establish the characteristic impedance. The effect apparently
can be measured and there exists an equation for it. I just
had a flashback that it might be in Chipman.
--
73, Cecil http://www.w5dxp.com
"According to the general theory of relativity,
space without ether is unthinkable." Albert Einstein