By 1927, Chicago investor Samuel Insull had purchased both stations, through his company Great Lakes Broadcasting. On September 1, 1928, WBCN was discontinued, and WENR began full-time operations on the frequency. In November 1928, the station once more changed frequencies, this time to 870 kHz, sharing time with WLS, and it became the first Chicago radio station operating 50,000 watts of power from a new transmitter in Downers Grove, Illinois. Insull moved his stations first into Chicago's Strauss Building, and then to his own Civic Opera Building.