|Broadcast area||Portland, Oregon
|Branding||105.1 The Buzz|
|Slogan||"Today's Best Mix"|
|Frequency||105.1 MHz (also on HD Radio)|
|First air date||July 3, 1970 (as KSLM-FM)
August 28, 1998 (as KRSK)
|Format||Adult Top 40
HD2: Radio Disney (CHR)
|HAAT||470 meters (1,540 ft)|
|Callsign meaning||RoSie 105 (former branding)|
|Former callsigns||KSLM-FM (1970-1973)
(Entercom License, LLC)
|Sister stations||KGON, KNRK, KYCH-FM, KWJJ-FM, KMTT, KFXX|
KRSK is an American broadcast commercial radio station in Molalla, Oregon, broadcasting to the Portland, Oregon area on 105.1 FM, airing an adult top 40 music format branded as "The Buzz", playing current and 2000s hits. The station also broadcasts in HD Radio. The studios are located south of downtown Portland, and the transmitter site is in the city's west hills.
The station signed on the air on July 3, 1970 as KSLM-FM (licensed to Salem), then in 1973, changed their call letters to KORI. In 1978, KORI changed their call letters to KSKD and aired an automated top 40 format as "Cascade 105". On March 7, 1986, KSKD changed their call letters to KXYQ and aired a top 40 format as "Q-105", later switching to adult contemporary. On June 15, 1995, KXYQ-FM changed their format to classic rock, branded as "Earth 105" and changed their call letters to KKRH on July 17, 1995. On June 5, 1998, at 5 PM, KKRH began its current hot adult contemporary format as "Rosie 105" (changed its call letters to the current KRSK on August 28, 1998), later becoming "Rosey 105" before changing to its current "105.1 The Buzz" branding.
As of 2011, KRSK, whose playlist and direction had favored modern/alternative acts, began adding more contemporary pop currents, moving the station into a more broader Adult Top 40 direction. The move puts them in competition with Clear Channel's pairing of Mainstream Top 40 KKRZ, Rhythmic Top 40 KXJM and Adult Contemporary KKCW. At the same time they also have another Adult Top 40 to compete against in KBFF, who debuted their female-friendly, "Gen-X" direction in May 2011. In response to KBFF's slogan of "Today's Modern Mix for the Modern Woman," KRSK responded by countering with a similar-sounding slogan, "Today's Modern Mix." However, after a week of using that slogan, KRSK changed it to "Today's Best Mix", possibly to avoid a cease & desist from KBFF owner Alpha Broadcasting.
In 2006 KRSK added an HD2 subcarrier to its lineup, which aired a comedy format, until July 2011, when they switched to a blues format as "The Delta". On March 14, 2017 KRSK-HD2 switched to Radio Disney.
In June 2010 KRSK added an HD3 subcarrier to its lineup, which broadcast ESPN Deportes Radio until August, when they switched to ESPNews, which lasted until July 2011 when the HD3 subchannel was discontinued.