What Happened to the Radio Stations You Could Only Hear at Night?

Why did America's 25 clear-channel AM stations, heard only after dark from hundreds of miles away, lose their night audience? The physics never changed. The rules, the programs and the radios did. In 1928 the Federal Radio Commission reserved 40 of the 96 AM channels for a single station each at night. By 1982, Arbitron credited Larry King's overnight show on Mutual with about 4 million listeners a night. Then the clear frequencies opened to new stations, satellites carried one host to every big signal, and electrical noise crept onto the band. What this video covers: • 1928: General Order 40 and the birth of the clear channels • 1978: Larry King, Mutual and the national overnight call-in show • 1980: The FCC decision that cut clear-channel protection to 750 miles • 1982: How satellite feeds put the same voice on the biggest stations • 1996-2023: Consolidation, electrical noise and carmakers dropping AM If you chased a faraway station across the dial at 2 in the morning, you may remember it fading under the static. Tell us which station you listened for. Subscribe for more patient histories of the radios, records and signals that slipped away. The clear channels still broadcast at 50,000 watts. The shared night they carried is over.