Five days after the assassination of John Lennon, radio engineer Rob Grayson compiled a montage of every Beatles song in alphabetical order and aired it following a ten minute period of silence.
• MP3: Rob Grayson's "Beatles A-Z" (16 minutes, 9.1MB), from December 13, 1980.
The Lennon tribute is a small part of Reel Radio, a massive archive of pre-1989 Top 40 Radio audio clips. Many are hour-long unedited radio broadcasts, like this Alan Freed broadcast from March 23, 1955, or these two Don Steele broadcasts from a couple months after I was born. Try using the search engine to find a clip from your year of birth.