On Jan 26, 9:12*am, Cecil Moore wrote:
Keith Dysart wrote:
And that would seem to narrow the applicability
of the original assertion rather severely.

What do you know? It narrows it to amateur radio,
the subject of this newsgroup.

I was unaware that all Amateur transmission lines
were a multiple of 1 wavelength long. Are you sure?

To be entirely technically correct, since my assertion
was about average powers, the example transmission line
must be an integer multiple of 1/4 wavelength.

I would suggest 1/2 wavelength. For an intuitive proof,
consider a line with only forward power. Then think
of a quarter wave section with a voltage peak in the
middle. Then consider when the voltage 0 is in the
middle. Lots more energy in the former than the latter.
At 1/2 wavelength, the total energy in the line section
is constant.

...Keith

...Keith