JB wrote:
There will be resonances in the entire line that
cause points of high voltage and high current.

Ideally, not if the SWR is 1:1 on the 50 ohm coax
in which case, the RMS voltage and current is constant.
Such a line is known as a "flat" line. At any point up
and down the line the ratio of voltage to current
is 50 ohms.
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73, Cecil http://www.w5dxp.com