Jimmy wrote:
"Efficiency is based on how much of your signal your antenna turns into
heat compared to the amount radiated and nothing more."

With some reshuffle of terms, Terman seems to agree. On page 893 of his
1955 edition:

"The efficiency of the antenna as a radiator is the ratio: Rradiation
/ Rradiation + Rloss----."

Best regards, Richard Harrison, KB5WZI