"Richard Fry" wrote in message
...
"Roy Lewallen" wrote:

All the power produced by the transmitter arrives at the antenna
less whatever is lost as heat in the transmission line. There are no
waves of average power bouncing back and forth on a
transmission line. Mathematically separating the power moving
down the line into "forward" and "reverse" components doesn't mean that
waves of average power actually exist.
____________

Roy, I have been involved with the evaluation and repair of FM and TV
broadcast antenna systems where the initial problem was a failure in the
antenna, which then produced a high mismatch between it and the main
transmission line.

The allegedly non-existent nodes along the transmission line for this
condition did a fine job of melting holes in the inner conductor and
Teflon insulators of 3-1/8" OD (and larger) rigid transmission line, at
1/2-wavelength intervals over a considerable length of that line.

What other phenomenon do you believe caused such a result?

RF

Hi Richard

I recognize that you address your question to Roy, so forgive me for
breaking in.
It seems clear that the power is generated at the "source" and disipated
at the "load" and that between the source and the load, only disipative
components will exist.
I would ask "what component along the transmission line between the source
and load can *inrease* power?".

As for the melting of condutors at 1/2 wave intervals, I attribute that to
high current density related to a low impedance at that point. The damage
may actually be related to the high impedance on the line which caused the
voltage to rise too high.

Jerry