In 1924, a financial crunch meant that the station might be forced to close down. The St. Olaf senior class and local newspaper, The Northfield News, campaigned for donations. Money came in from across Minnesota and several nearby states. This made WCAL the first listener-supported station in the United States. From 1928-circa 1954, WCAL was entirely listener-supported and received no direct financial support from St. Olaf College. In 1949, the station's card file held the names and addresses of over 60,000 donors. The station's AM signal was heard as far as the western United States, Mexico, Florida, Alaska and Canada.