Hi Tom,
Here's an even more possible explanation from this web site by an amateur ham:
http://www.amwindow.org/tech/htm/aircheck.htm
"The term "aircheck" is borrowed from broadcasting, where disc jockeys and newspeople can hear
their on-air performance with a sense of realism not possible by simply recording from the studio
microphone.
The realism comes from how someone's voice is changed by the audible characteristics of the
station's transmitter, audio chain and processing equipment. For broadcasting, it's an absolute
way to judge "loudness" against a competitor."
I've always understood it also was used by engineers to check the quality of radio broadcasts and
transmitters "over the air".
Rod Stephens
Tom Fine wrote:
What is the genesis of the term "aircheck" and how did it come to mean "off-air recording", or
did it mean something different at another time?
-- Tom Fine