Richard Clark wrote:

Cecil Moore wrote:
According to Dave's calculations, 1" of 50 ohm coax will
result in a negligible error in the SWR on that 1" of coax.

Negligible for you, is brighter than the sun for everyone else.

When reflections are completely canceled, appear to have
disappeared from everyone else's sight, and you say they are
brighter than the sun (for you), who am I to argue? You have
created your own unreality and everyone who understands the
physics of 1/4WL thin-films in this universe laughs at you
every time you post that "brighter than the sun" nonsense.
In your calculations, you superposed powers which is not
a valid thing to do and you apparently haven't even
comprehended the error of superposing powers.

No numbers, hmm?

Dave provided the numbers. Check his posting. Simply stated:
The unwanted mode is attenuated by 1/e with each increment
of length equal to the spacing between the two conductors.
If the conductor spacing is 0.1", the unwanted mode is down
to 0.00000001% in one inch. That's a big surprise to me but
I don't see any reason not to believe it.
--
73, Cecil http://www.qsl.net/w5dxp