That’s a catchy tune for sure but it’s odd to hear someone being nostalgic about it. It wasn’t unusual for someone to say “sorry but all I have is am jams” if they gave you a lift and their radio didn’t have FM (AM being pronounced phonetically so it rhymes with jams). AM radio was more known for oldies, pre 60’s music. Also the signal faded when you drove under a bridge. For reference I graduated in '84