Channel 6 became WDMJ-TV, the Upper Peninsula's first television station, on April 28, 1956. The station broadcast programs from all three networks available at the time, but it was mostly a CBS affiliate. The Daily Mining Journal owned both WDMJ and WDMJ radio (1320 AM). Its headquarters were located on the top floor of the Mining Journal building on Washington Street in downtown Marquette. The station's facilities were rapidly outgrown. The station relocated to its new studios in Negaunee Township in 1959. In 1964, it was sold to Post Corporation, proprietors of WLUK-TV in Green Bay, Wisconsin, who changed the calls to WLUC-TV to match its moniker at the time "Lucky 6". In 1963, WLUC began transmitting network programs in color, and in 1969, with the purchase of color video tape technology, it began showing all locally produced programming in color. In 1980, the station relocated its transmitter to the southeast of Republic and decommissioned the previous one near its new studios in Negaunee.