George, W5YR wrote:
"This is some times referred to as reflection gain and results from the
presence of more power in the load than absence of the tuner would
permit."

Words work best when their meanings are agreed. It is generally agreed
that the decibel (abreviated db) is a logarithmic unit used in
communication work to express power ratios. (The definition is
Terman`s.) The Bell System used the abreviation db, not dB.

An audio output transformer is used with a low-impedance speaker to
better match a high-impedance source for a louder signal than the
voice-coil in series with a tube would produce. Still, a good
transformer is usually said to have low loss, not give more gain .

I have no problem with "reflection gain", but I would have looked for a
definition.

Best regards, Richard Harrison, KB5WZI