KTNF (950 kHz, AM 950) is a commercial AM radio station licensed to St. Louis Park, Minnesota that serves the Minneapolis-St. Paul metropolitan area. The station brands itself as "The Progressive Voice of Minnesota," and offers a combination of locally produced and nationally syndicated progressive talk programming. It is owned by JR Broadcasting. KTNF's studios and transmitter are located on Valley View Road in Eden Prairie. It operates with 1,000 watts around the clock, using a directional antenna, with a two-tower pattern by day and a three-tower pattern at night. Syndicated hosts heard on KTNF include Stephanie Miller, Thom Hartmann, Amy Goodman and Mike Papantonio. Westwood One News and AP Radio News provides news broadcasts at the top of the hour. History On May 13, 1958, the station signed on as KRSI. It was owned by Radio Suburbia and its studios were located at 4500 Excelsior Blvd. in St. Louis Park. On July 1, 1962, it started an FM sister station at 104.1 MHz, which, following many format changes, is now KZJK. At one point, both stations were owned by Red Owl Stores. In October 1972, the two stations moved to what is now the AM station's current studio and transmitter facility in Eden Prairie. The 950 AM frequency has been home to many formats. KRSI was one of the first Top-40 stations in the Twin Cities in the late 1950s. While it was owned by Roy H. Park, KRSI carried one of its most popular formats, simulcasting with 104.1 KRSI-FM as Top 40 "All Request Radio," between 1968 and 1972. Over the years the station has been through many formats, including: MOR format "Music You Remember" (1958-1968) Top 40 as "Request Radio" (1968-1973) (began 24-hour operation) Country music (Automated Drake-Chenault "Great American Country") (1973-1979) Rock/new wave ("Musicradio I-95") (1979-1980) Adult standards (Music of Your Life, simulcast with KRSI-FM) (February 1980 – 1982) Country music (SMN "County Coast To Coast") (1982-1984) CHR (SMN "Rock America") "Hot Rock 950 KRSI" (1984-1985) Oldies "Request Radio" (1985-1986) Simulcast with FM as KJJO (1986-1988) Urban AC (SMN "Heart And Soul") (1988) Hard rock (Satellite Music Networks' "Z-Rock") as KZOW (1988-1990) Business Radio Network (KJJO) (1990-1992) Simulcast with FM (KJJO/KMJZ) (1992-1995) R&B oldies as KSGS ("ABC Solid Gold Soul" w/Local AM Drive) ("9-5-0 Solid Gold Soul") (1995-1999) Urban Adult Contemporary (ABC "The Touch" w/Local AM Drive) (1999-2001) Business Radio as KDOW, then KCCO ("Business 9-5-0")