station because of repeated willful violations of nighttime broadcast power restrictions on the AM band. KDWB and WDGY were fierce rivals throughout the 1960s and 1970s. During the 1970s, the two top 40 stations saw new competition as KSTP and WYOO (U100) picked up the format. In 1976, Fairchild Industries, owner of U100 (which operated as a simulcast at 980 AM and 101.3 FM), decided to divest the stations. KDWB owner Doubleday Broadcasting acquired the FM station. On September 16, 1976, with the sale closed, KDWB signed on its FM simulcast. Within the next three years, KDWB's Top 40 rivals gradually dropped out of the format: U100 was gone in the sale of its AM/FM combo, WDGY flipped to country music in September 1977, and KSTP began to lean adult top 40 during the late 1970s and slowly evolved into its longtime news/talk format by the early 1980s. By the end of the decade, KDWB was the only Top 40 station in the market. With the Top 40 competition gone, KDWB-FM split apart from its AM sister in September 1979 and became a pop/rock hybrid as "K101." K101 quickly morphed into "Stereo 101," an album oriented rock station designed to compete with KQRS-FM, which had recently dumped its free-form rock presentation and had adopted a stricter playlist. "Stereo 101" proved to be mildly successful, even topping KQRS in the ratings several times. During the four-year run of Stereo 101, new Top 40 stations began appearing on the FM dial, first with WLOL in December 1981, which quickly became one of the most successful stations in the market, and later an attempt by WCCO-FM, which was not nearly as successful. Both moves crippled 63 KDWB's longtime dominance of the format, since it was at a disadvantage with its limited AM signal compared to the more powerful and clearer FM signals. The massive top three ratings success of WLOL, combined with rapidly falling ratings for AM stations in general, resulted in Stereo 101 ditching album rock in early 1984 and returning KDWB-FM to Top 40 as "KDWB FM 101", this time as the dominant station in the AM/FM combo. Over the next two years, both stations aired similar formats and continued to simulcast from time to time, until the AM station split off on its own early in May 1986 with an automated syndicated oldies format from Unistar as "K63", meeting with