In the middle 1960's, The Army trained me as a cook and sent me to Fort Riley, Kansas. (By the way, the very best cook there was a former helicopter pilot.)
I managed to talk my way into electronics and ended up at the receiver site. My first experience there was tuning in a RTTY signal. ( I had already spent a couple years
at home
copying RTTY off the air.) I had a heck of a time tuning in the other station with an unfamiliar receiver. Eventually I realized our own transmitter was still operating on the simplex frequency. I told the guy at the com center he needed to turn our transmitter off to receive. His response was the he had copied a little bit (Without a clue that what he copied came from the receiver site.)
He did start unkeying the transmitter. I guess things worked better. But that was almost 60 years ago.The only thing I remember clearly was that guy's stupidity.
Tom N3CRK