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KOST Los Angeles Radio History
by Alex Cosper

see also American Radio History

Introduction 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s


Los Angeles Radio History


STATION HISTORY: KABC KBBQ KBIG KBLA KDAY KEZY KFAC KFOX KFWB KGBS KGFJ KGIL KHJ KIEV KIIS KIQQ KKBT KKDJ KLAC KLOS KLSX KMET KMPC KNAC KNX KOST KPOL KPPC KPWR KQLZ KRLA KROQ KRTH KSRF KTNQ KTWV KUTE KWST KZLA XPRS

KOST has been a popular adult music station for decades. Like most dial positions in any market, the call letters, formats and personalities have changed periodically. The 103.5 frequency in LA was originally held by KGLA, which launched on October 9, 1956.

The station was purchased by top 40 radio programming pioneer Gordon McLendon, who changed the call letters to KADS in November 1966. With permission from the FCC, KADS stood for "ads" as the station experimented with a new format of all advertising. The FCC had just passed a ruling that FM stations had to originate at least half of their programming instead of being full-time simulcasts of sister AM stations. The concept of all ads was similar to the classified ad section of a newspaper.

After the KADS experiment failed to catch on, the call letters changed to KOST in March 1968 with a beautiful music format consisting mainly of instrumentals. Aside from meeting FCC requirements to broadcast occasional news, the programming was mostly non-stop music and commercial breaks. Cox Communications, which had just bought AM 640 KFI, purchased KOST in 1973. The station maintained an easy listening sound throughout the decade, sprinkling in vocals.

The format flipped to soft adult contemporary on November 15, 1982, introduced by Bryan Simmons, who became one KOST's long-time personalities, working for the station through 2011. Mark Wallengren and Kim Amidon became the new KOST morning team on February 3, 1986. The team continued the show through 2007. Midday host Mike Sakellaride left shortly afterward after many years. Cox sold KOST and sister AM station KFI in 1999 to AMFM, which merged into Clear Channel the following year. In 2014 Clear Channel changed its name to iHeartMedia.

KOST Personnel

1968-1973 Norm Epstein
1970-1977 Rob Edwards
1972-1974 Rod Roddy
1977-1977 Johnny Rabbitt
1982-2001 Bryan Simmons, also 2004-2011
1985-1991 Laurie Sanders
1985-1985 "Machine Gun" Kelly


Introduction 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s


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