Jim Kelley wrote:
The amplitude term is a contant. It does not vary with time.

Uh Jim, please look at this web page and tell me again
that the amplitude is constant and doesn't vary with time.
The standing wave loop looks like a kid's jump rope. Note
that the amplitude of the standing wave is zero everywhere
two times per cycle. How can the amplitude be constant?
It's RF, for goodness sake.

http://einstein.byu.edu/~masong/HTMs...newave2EX.html
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73, Cecil, W5DXP