Stefan Wolfe wrote:
I believe in the case at
hand (a transmission line far removed from the source) that it is possible
for there to be a plus power differential from the sum of the source powers
at any given segment as long as there is equal power subtracted at another
location.

Yes, at least someone understands. The "plus power" is
needed by constructive interference. The "power subtracted"
is given up by destructive interference somewhere else.
Apparently, none of the gurus on this newsgroup have ever
considered where the "plus power" comes from while
belittling anyone who wonders where it comes from.
--
73, Cecil http://www.w5dxp.com