KSJN (99.5 FM, "YourClassical MPR") is the flagship station of Minnesota Public Radio's classical music network, serving the Twin Cities region. KSJN's studios are located at the MPR Broadcast Center on Cedar Street in downtown St. Paul, while its transmitter is located on the KMSP Tower in Shoreview. The 99.5 frequency was established as commercial radio station WLOL-FM in 1957; the station achieved its most success as a top-rated Top 40/CHR station during the 1980s. It was purchased by MPR in 1991. Background KSJN intellectual unit Saint John's University in Collegeville, near St. Cloud, built and began operating the first station in the network, KSJR-FM (90.1), in January 1967. By 1968, however, it was obvious that there weren't enough listeners in the immediate St. Cloud area for the station to be viable. KSJR nearly tripled its power in hopes of reaching the Twin Cities, but even then it only provided grade B coverage of Minneapolis and completely missed St. Paul. To solve this problem, Saint John's signed on KSJN at 91.1 MHz, originally licensed to the northern Twin Cities suburb of New Brighton, as a full-time repeater of KSJR-FM. By 1969, Saint John's realized it was in over its head operating a full-service radio station, so it turned over KSJR and KSJN to a nonprofit corporation, Saint John's University Broadcasting. This organization later changed its name to Minnesota Educational Radio, and finally Minnesota Public Radio. In 1969 and 1970, MPR assisted in the formation of National Public Radio and was a founding member of the organization. Four years later, in 1974, the network began live broadcasting of Garrison Keillor's A Prairie Home Companion, one of the best-known programs on American public radio. MPR made plans to establish a dedicated news/talk service as NPR's programming became more popular. To that end, in 1980, it purchased WLOL (1330 AM) and changed its calls to KSJN. In 1989, the AM station changed its calls to KNOW, a call sign used by an AM station in Austin, Texas for 50 years. It began airing an expanded schedule of NPR programming, while the FM station continued to air a mix of NPR programming and classical music. 99.5 FM history On July 18, 1956, radio station WLOL (1330 AM) was granted a construction permit for a new radio station to broadcast on 99.5 MHz. The station, WLOL-FM, began broadcasting in February 1957, airing a classical music