910 am see kksf am . this article has multiple issues . please help improve it or discuss these issues on the talk page . learn how and when to remove these template messages this article needs additional citations for verification . please help improve this article by adding citations to reliable sources . unsourced material may be challenged and removed . march 2013 learn how and when to remove this template message this article may require cleanup to meet wikipedia s quality standards . no cleanup reason has been specified . please help improve this article if you can . january 2010 learn how and when to remove this template message learn how and when to remove this template message kosf city san francisco california broadcast area san francisco oakland san jose california branding iheart 80s 103.7 slogan 80s music for the bay area frequency 103.7 mhz also on hd radio repeater s 103.7 kosf fm2 pleasanton first air date november 3 1947 as kgo fm format analog hd1 all 80s hits hd2 business news knew simulcast erp 6 400 watts haat 403 meters 1 322 ft class b facility id 65484 callsign meaning k oldies san francisco former branding former callsigns kgo fm 1947 71 ksfx 1971 82 kgo fm 1982 84 klok fm 1984 87 kksf 1987 2012 owner iheartmedia amfm broadcasting licenses llc sister stations kioi kisq kksf kmel knew kyld webcast listen live website 80sradio . iheart.com kosf 103.7 mhz is an fm radio station in san francisco california . the station is owned and operated by iheartmedia . the station s studios are located in the soma district of san francisco while the transmitter is based atop san bruno mountains near daly city california . 1 kosf airs a 1980s based classic hits radio format . contents 1 history 2 technical facts 2.1 hd broadcasting 3 references 4 external links history edit the former abc radio owned station started on november 3 1947 as kgo fm . in earlier days it simulcast its sister station 810 kgo occasionally airing a stereo version of the lawrence welk show . by the late 1960s as fm stations were required to offer separate programming from that of their am counterparts kgo fm like other abc owned fm stations was an outlet for abc love an automated progressive rock format . kgo fm became ksfx in early 1971 and continued in a progressive rock format until may 1973 . then ksfx ran a top 40 musicradio approach similar to wabc in new york city . by late 1974 the station veered towards a dance soul flavored format . during the late 1970s ksfx had a brief run with a disco format . in late 1980 ksfx veered towards an album oriented rock format modeled after sister station klos in los angeles . this lasted until may 1982 when stiff competition from kmel now an urban formatted station and cbs owned krqr forced ksfx to drop aor for talk featuring the abc syndicated talkradio network again as kgo fm ; this complemented the primarily local talk programming of its am sister station . abc sold the station on january 1 1984 to weaver davis fowler wdf which owned klok in san jose ; accordingly the station was renamed klok fm . klok fm had an interactive adult contemporary format called yes no radio in which listeners would phone in their votes on whether songs should remain on the playlist . in 1987 the station was sold to brown broadcasting corporation the call sign was changed to kksf and under the direction of former kifm san diego programmer turned consultant bob o connor and associate michael fischer the format was switched to new adult contemporary nac which would later evolve to smooth jazz . kksf debuted on july 31 1987 at midnight ; the first song played was by steve winwood . the general manager from 1987 to 1997 was david a. kendrick . liner notes of the first kksf sampler for aids relief list the members of the group responsible for the development of the kksf concept as willet brown mike brown dave kendrick phil melrose bob o connor michael fischer and steve feinstein . steve feinstein who had previously been a format editor at trade magazine radio and records was chosen by consultant bob o connor and gm dave kendrick to be kksf s first program director . until his death in 1996 feinstein guided kksf to be one of the leading stations in the nac format . he was known for being open and responsive to listener comments and suggestions and constantly searched for new and interesting music that fit the kksf sound often gravitating to lesser known imports and hard to find out of print selections . in 1988 the station teamed with the san francisco aids foundation to produce their first kksf sampler for aids relief . songs were donated by their artists so that kksf could give all the net proceeds from the sale of the sampler albums to the san francisco aids foundation . often the sampler cds were the only way to find certain kksf listener favorites that had otherwise gone out of print . there were seven kksf samplers produced by dave kendrick and steve feinstein with sampler 7 being dedicated to feinstein s memory as he died in september 1996 during the album s creation . kksf was also the first commercial radio station to have a web presence putting up a web site in october 1993 as kksf.tbo.com and eventually www.kksf.com created by chief engineer tim pozar and morning host roger coryell . in 1993 brown broadcasting purchased classical station kdfc then at 102.1 fm . the two stations were co located at 455 market street until 1997 when both were sold to evergreen media . evergreen sold kdfc to bonneville that same year but kept kksf which eventually passed to chancellor broadcasting amfm broadcasting and finally clear channel communications which became iheartmedia in 2014 during a short period of rapid ownership changes in the late 1990s . studios were moved to their present location at 340 townsend street in 1998 . the sound of kksf changed with the new ownership . the smooth jazz consultancy broadcast architecture became more involved with the station at this time . gradually the station became more like other stations in the u.s. using the smooth jazz handle dropping some of its more eclectic music along the way in favor of mass appeal r & b songs . the 2000s brought many changes to kksf . during 2001 many announcers left a number of them going to former sister station kdfc . through the next eight years the number of live announcers on staff gradually decreased as kksf began airing syndicated shows in morning drive like the national wake up with whoopi show hosted by whoopi goldberg and later the ramsey lewis morning show featuring pianist ramsey lewis . in 2008 kksf added the syndicated dave koz show to afternoons . by the end of the smooth jazz era at kksf only midday personality miranda wilson was truly live in her time slot . logo as 103.7 the band used from may 18 2009 to april 8 2011 . on may 18 2009 at 3 p.m. kksf flipped to classic rock branded as 103.7 the band . owner clear channel cited economic considerations and the results of exhaustive market research . the first song on the band was everybody s everything by santana . 2 the demise of smooth jazz on kksf also ended one of the bay area s most spirited radio rivalries as kksf battled it out with urban ac kblx which often included smooth jazz in its quiet storm format . in its first few months as the band kksf gained listeners aged 25 54 considered a more desirable group by advertisers than kksf s previous audience which skewed considerably older . the station features mostly out of market personalities who voice track their shows and has a very small local staff . kosf logo 2015 16 kksf began shifting to more of a classic hits format in february 2011 after entercom added classic rock on kuzx using one time sister station kdfc s former frequency . the classic hits format had previously been heard on cbs radio s kfrc fm which became a simulcast of all news kcbs in october 2008 . the shift to classic hits was completed on april 8 2011 at 3 pm when the station rebranded as oldies 103.7 . the last song on the band was changes by david bowie while the first song on oldies was i got you i feel good by james brown . 3 4 the branding was changed to simply 103.7 fm that december ; on december 13 it added the fm suffix . on january 3 2012 kksf changed its call sign to kosf . 5 in november 2013 kosf changed its name on air to the bay s 103.7 with no other changes . on may 2 2014 at 5 pm kosf again rebranded this time to big 103.7 again with no programming changes . the first song on big was born to be wild by steppenwolf . 6 at noon on june 6 2016 after playing last dance by donna summer kosf flipped to all 80s hits as iheart 80s 103.7 . the change came after its namesake webstream was ranked the most listened to stream on the iheartradio streaming platform and mobile application for 2016 . the first song on iheart 80s was we built this city by san francisco band starship . kosf was commercial free for eight days to launch the format and legendary mtv vj martha quinn hosted the morning show . 7 8 9 this marks the second station in the san francisco market that has aired an all 80s hits format the first being sister station kioi from november 2000 to january 2002 . technical facts edit kosf is a class b fm station transmitting from mt. san bruno at an effective radiated power of 6 400 watts . a low powered booster in pleasanton california fills in east bay coverage gaps caused by topography issues . hd broadcasting edit the station broadcasts digitally using the hd radio system from ibiquity . kosf s hd broadcast also makes available a second channel that can only be received with an hd radio capable receiver . the format of the hd2 channel is bloomberg business news simulcast with knew am 960 . 10 from the time the station started its nac format in 1987 to mid 1996 the station used very light audio processing in order to create a signature sound . it was based on the schulke beautiful music approach of having a very light touch to the audio . kksf s chief engineer tim pozar who was also one of the co founders of san francisco s first isp tlgnet 11 installed an aphex systems audio chain of a compellor and dominator along with a digicoder which was one of the first digital stereo generators . tim pozar also put up the original 1993 web site through tlgnet . 12 references edit http radio locator.com cgi bin patg id kosf fm https radioinsight.com blog headlines netgnomes 990 kksf san francisco joining a band the band is playing oldies in san francisco . radioinsight . april 8 2011 . retrieved april 8 2011 . the band becomes oldies 103.7 call sign history . federal communications commission . retrieved 2012 01 03 . venta lance may 2 2014 . http radioinsight.com blog headlines 88544 kosf gets a big rebranding . radioinsight . retrieved may 3 2014 . external link in title help http www.radioinfo.com june 6 2016 kosf san francisco to become iheart 80s radio kosf becomes iheart 80s 103.7 http hdradio.com station guides widget.php id 4 hd radio guide for san