Cecil, W5DXP wrote:
"What ? "Cancellation of the two reflected waves"??? Some of the gurus
here say that cannot happen, that there is never any interaction between
waves."

I was quoting Terman word for word. In more than 60 years of studying
him I have never found him mistaken. Terman uses words like
cancellation, waves, and power. These words make me comfortable even
when I don`t understand what was said upon first reading.

On the subject of the Flagpole J, Kraus has some words on matching with
a short-circuited 1/4-wave stub on pages 719 and 720 of his 3rd edition.
These reminded me of a conversation with Charlie Wright of A.D. Ring &
Associates I had over 50 years ago. Although Kraus had already
published, we didn`t have his book.

Kraus writes:
"A modification of this antenna is shown at (e) in which a
short-circuited 1/4-wave section of coaxial line is connected in
parallel with the antenna terminals. This widens the impedance bandwidth
and also places the stub antenna at ground potential. This is desirable
to protect the transmission line from lightning surges."

From experience, Kraus has proved to be correct and you can bank on what
he says. Frequency agile amateurs find resonant lengths of transmission
line troublesome at times, but more bandwidth over a narrow range and
protection from lightning are big assets where needed.

Best regards, Richard Harrison, KB5WZI