The year1973 saw a number of significant events inradio broadcasting history.

• 4 June –KFMH ofDavenport, Iowa, flips from itsbeautiful music format toalternative rock, using the slogan "99 Plus." The first song is reportedly "I've Seen All Good People" byYes. The new station quickly gains a cult following and a reputation for playing music and showcasing genres and local artists ignored by other stations.
• 15 October – Dutchpublic-broadcasting stationHilversum 3 begins round-the-clock transmission.

• KWNT-FM (106.5 FM) ofDavenport, Iowa, switches from country music tobeautiful music and lighteasy listening, with the new call letters KRVR (with the slogan "K-River"). The new format will become the signature of the frequency for the next 22 years, but leaves theQuad-Cities market without a full-time FM country music station for most of the next five years. KWNT's AM station (1580 AM) remains country.
• André Baruch and his wife move toPalm Beach, Florida, to do a top-rated daily four-hourtalk show for five years before relocating toBeverly Hills, California.

• Unknown date –DWFM 92.3, owned byNation Broadcasting Corporation inManila, Philippines signs on the air, becoming the third FM station in the nation's capital.
• February 5 –WABB-FM inMobile, Alabama, signs on, initially simulcastingits sister AM station and maintaining atop 40/CHR format until March 1, 2012. The first song played is "Stuck Inside of Mobile with the Memphis Blues Again" byBob Dylan, which will be repeated upon WABB-FM's 2012 signoff.
• February 23 –DWLL in Manila, Philippines signs on the air asWLL 94.7 orMellow Touch 94.7 one of the pioneer FM stations that does not have live announcers or music DJs in their programming.
• May 16 –URB 963, a student radio station at theUniversity of Bath (England) begins broadcasting
• August 27 –WCCO-FM (laterKMNB) relaunches with new 100,000 watt signal.
• October 6 –American Country Countdown, a country music-oriented version ofAmerican Top 40 featuring the top 40 songs of the week based onBillboard magazine'sHot Country Singles chart. Created by Don Bustany andCasey Kasem and distributed byWatermark Inc., the host is Don Bowman, who will remain with the program for 4½ years.
• October 8 –LBC (laterLondon News 97.3,News Direct 97.3FM andLBC 97.3), the firstIndependent Local Radio station in theUnited Kingdom, begins broadcasting to theLondon area.^[1]
• October 16 –Capital Radio (laterCapital FM andCapital 95.8) begins broadcasting to theLondon area.^[1]
• December 31 -Radio Clyde (laterClyde 1 and102.5 Clyde 1), the first UK independent local radio station outside London, and the first inScotland, begins broadcasting to theGlasgow area.^[1]

• TheFeminine Forum concept dropped byKGBS, becoming theBill Ballance Show

• March 9 –Uribe DJ, Colombian radio personality and television host
• April 18 –Jad Abumrad, American radio host, co-founder ofRadiolab on public radio
• June 22 –Carson Daly, American radio and television personality, host ofLast Call with Carson Daly onNBC

• January 11 –Isabel Randolph, 83,Americancharacter actress inradio andfilm from the 1940s through the 1960s and in television from the early 1950s to the middle 1960s^[2]
• January 24 –J. Carroll Naish, 76, Americancharacter actor^[2]
• June 1 –Walter Greaza, 76, American actor^[3]
• June 6 –Jimmy Clitheroe, 51, English comic entertainer
• July 25 –Edgar Stehli, 89, American actor^[4]
• October 27 –Howard Marshall, 73, English radio commentator

• 1973 in radio
• Radio by year

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