Tom Donaly wrote:
"You and Richard Harrison are beginning to sound lke Bishop Berkeley."

We are in good company. Terman says on page 84 of his 1955 opus:
"In these equations Zo = sq rt Z/Y is termed the "characteristic
impedance" of the line. In the case of radio-frequency lines, Zo can
nearly always be assumed to be a pure resistance, as discussed on page
88."

When Terman says SWR = Emax / Emin, it makes no difference whether you
use instantaneous values or rms values, so long as you are consistent,
the ratio is the same.

Some complained that nobody provided a trustworthy VSWR related to
power. Bird Electronic Corporation does:

VSWR = 1+sq rt (reflected pwr/forward pwr) over 1-sq rt (reflected
pwr/forward pwr).

Millions of conversions have proved this VSWR from measured powers
relation.

Best regards, Richard Harrison, KB5WZI