Richard Clark wrote:
"An antenna is not in "equilibrium" so says Marx (of Hart, Shaffner &
Marx)."

How about Chico, Harpo, and Groucho?

Art Unwin hopes to stump us by not defining what he means if anything by
"equilibrium". A synonym, "balance" is often used in radio. Terman
defines "balance" on page 901 of his 1955 opus:
"It is sometimes desirable to deliver power to a grounded antenna
through a two-wire transmission line or, conversely, to use a coaxial
cable line to deliver power to an ungrounded antenna system that is
symmetrical with respect to ground. In either case, it is necessary to
convert between a balanced system that is symmetrical with respect to
ground, and an unbalanced system in which one side is grounded."

That seems to capture a problem we had here. Art is unbalanced and we
are well grounded. None of us is in equilibrium.

Best regards, Richard Harrison, KB5WZI