had a talk format during his tenure), documented some of the period at the Davern Street location, 1972–75, in this commentary. WLOL-FM dropped classical and changed to "beautiful music" in mid-1973. By 1977, WLOL was running country music, and switched to the WRRD call sign the following year, calling itself "The Big Red." In July 1979, the station flipped to a short-lived rock format branded as "13 Rock" This would be the station's final music format. In January 1980, Minnesota Public Radio (MPR) purchased the station and changed the call letters to KSJN to correspond with their FM property, KSJN-FM 91.1. Meanwhile, WLOL-FM transitioned to a pop music format before eventually being sold off to different company. The purchase of the AM station was a fallback plan for MPR, which wanted to acquire a second FM signal in order to split KSJN-FM into separate talk and classical music stations; MPR had tried to buy KBEM-FM 88.5 a year earlier to achieve that goal. On October 9, 1989, the call letters were changed to KNOW and the station became the flagship for MPR's new news and information network. WLOL-FM kept its call sign as it was sold off, and found another owner when it was purchased by Emmis Broadcasting in 1983. The call letters enjoyed their biggest success when the station aired a Top 40 format from 1981 to 1991. The station remained popular until Emmis ran into financial problems in the early 1990s as a result of its purchase of the Seattle Mariners baseball team. Many of Emmis' radio properties were sold off, and in 1991, in a somewhat ironic turn of events, they sold the 99.5 license to MPR for $12.5 million. MPR moved the KSJN calls and their classical music programming to 99.5 on March 11, 1991. MPR's existing 91.1 signal then became KNOW-FM, with talk and news programming full-time. With two FM frequencies in the Twin Cities, MPR pondered other uses for 1330 AM. After four years of simulcasting KNOW-FM, it became WMNN in September 1995, the flagship of the commercial Minnesota News Network. WMNN was sold in 2004 to Starboard Broadcasting, which turned it into "Relevant Radio," a Catholic religious format and soon restored the original WLOL call sign. Between 1991 and 2004, the WLOL call letters were used by several other stations, including 1470 (now KMNQ), 100.3 (KFXN-FM), and 105.3 (WLUP). The call sign returned