A
Avid Listener
Guest
What you are describing is typical of AM/FM combos with a daytime AM. The FCC 1967 order that forced larger market combos to cease simulcasting did not apply in some special cases, and among them was the FM simulcasting of a daytime AM.
This was not an AM daytimer. Both AM and FM were on the air 24/7.
As for the technical details, I am both ignorant and apathetic. I don't know, and I don't care. Whatever technical wizardry is done by the guys wearing pocket protectors doesn't mean diddlysquat to me. I turn the radio on. I tune in a station. I listen. If if sounds good, good. If it sounds like crap, it's AM.