On Jun 18, 7:00*pm, Keith Dysart wrote:
Reflected waves heat finals, no they
don't, yes they do, ... but eventually I learned.

Hopefully, you learned that rail arguments are rarely valid and the
truth usually lies somewhere in between. Sometimes reflected waves
heat finals and sometimes they don't. It all depends on what kind and
how much interference exists between the forward wave and reflected
wave at the source impedance and (apparently) how much of that
impedance is dissipative or non-dissipative. Roy's food-for-thought
article doesn't take interference into account at all and therefore
arrives at magic conclusions divorced from reality.

Anyhow, I suggest you read my examples and find the flaws, for that
is the surest way to convince me that I am wrong.

I have pointed out many of the flaws in your examples. The way you
parse the energy violates the laws of physics. Maxwell's equations
only work on a function that contains classic EM traveling waves.
Standing waves and DC steady-state examples don't meet the necessary
boundary conditions. In fact, it can be proved that EM waves do not
existent during DC steady-state. The fact that an instrument designed
to detect EM waves malfunctions during DC steady-state is not
unexpected. Even an SWR meter calibrated for a different Z0 than the
one being used will indicate false results.

You really need to learn to recognize when your experiment and your
math model are contradictory, when your concepts violate the laws of
physics, and when you have chosen the wrong measuring equipment. You
remind me of myself when I was 14 years old and tried to measure the
screen voltage on a vacuum tube using a Simpson multimeter. It wasn't
anywhere near the voltage specified in the manual so I wasted my money
by buying a new tube the next time my family made a trip to Houston.

You would report those same measurement results as proof of a strange,
magical happening.
--
73, Cecil, w5dxp.com