out newswire services in the region, the Minneapolis Tribune asked the station's operators to help retrieve the day's news through a roundabout series of amateur radio relays. From 1927 to 1933 the station operated with a secondary call sign of "WGMS", for "Gold Medal (Flour) Station", which was used when station WCCO employed WLB's transmitter. (At the time, WCCO was also using its own facilities at 720 kHz, 740 kHz and 810 kHz.) Station facilities were moved to Eddy Hall in 1936. On November 11, 1928 a major reassignment of station transmitting frequencies took place, under the provisions of the Federal Radio Commission's General Order 40. WLB began operating on 1250 kHz, but a shortage of available assignments meant it had to share this frequency with three other stations: St. Olaf College's WCAL in Northfield, Minnesota; Carlton College's KFMX; and the Rosedale Hospital's WRHM, which in 1934 changed its callsign to WTCN (now WWTC). WLB, WCAL and KFMX were operated by educational institutions, while WTCN was a commercial station which aggressively sought to expand its operating hours at the expense of the other three stations. KFMX surrendered its license in 1933, and in 1938 WLB and WCAL made peace with WTCN by agreeing to move to 760 kHz, where the stations were restricted to daytime-only transmissions, with WLB to receive rds of the available hours. In 1941, as part of the frequency shifts resulting from implementation of the North American Regional Broadcasting Agreement, WLB and WCAL moved from 760 to 770 kHz. In 1991, The University of Minnesota made an agreement with St. Olaf in which WCAL was provided land for an improved FM tower near Rosemount, Minnesota in exchange for fulltime use of the AM frequency. WLB's programming was expanded to include lectures, concerts, and football games. In the 1930s and 1940s, the station broadcast a considerable amount of educational material and was used for distance learning—a practice that continued into the 1990s. On June 1, 1945, WLB's call sign was changed to KUOM, to stand for University of Minnesota. A polio epidemic in 1946 that resulted in temporary school closings and the cancellation of the Minnesota State Fair led the station to create programming for children who were homebound. Those programs, along with others broadcast in the 1940s, were recognized for their importance and led to several awards being given to the station. Carrier current WMMR In 1948