KCNC-TV (channel 4) is a television station in Denver, Colorado, United States, serving as the market's CBS outlet. It is owned and operated by the network's CBS News and Stations division, and maintains studios on Lincoln Street (between East 10th and 11th Avenues) in downtown Denver; its transmitter is based on Lookout Mountain, near Golden. History As an NBC affiliate (1953–1995) The station first signed on the air at 6:30 p.m. on December 24, 1953, as KOA-TV. KOA-TV brought NBC programming to the area which prior to the station's launch, was temporarily discontinued. The station aired an inaugural program followed by the Christmas feature The Lamb and the Manger. Founded by Metropolitan TV Company (partly owned by famed comedian Bob Hope, and not to be confused with a similarly-named company later known as Metromedia), owners of KOA radio (850 AM and 103.5 FM, now KRFX), channel 4 immediately assumed the NBC affiliation from KBTV (channel 9, now KUSA), due to KOA radio's longtime affiliation with and ownership by the NBC Red Network. In 1965, KOA-TV began carrying most of NBC's American Football League game telecasts as the network obtained the league's broadcast television rights (with play-by-play announcing duties handled by Curt Gowdy); however, Denver Broncos home games aired by the network had to be blacked out due to the team's inability to sell out tickets to the games (NFL blackout rules in effect at the time required teams to sell all tickets for home games in order to allow them to be broadcast in the team's primary market; the league later lowered the designated sales threshold to allow home game broadcasts to 75% of all tickets, and as of 2015, the blackout rules have been lifted indefinitely), this partnership continues to this day with CBS (with exception of a hiatus from the second week of the 1995 season to end of the 1997 season, when most games moved to KUSA in that interim period). In 1967, KOA-TV ran an award-winning documentary The Acid Test, LSD; hosted by news editor Bob Palmer, the film took five months to produce with more than 5,000 feet of film shot. Photographers involved included Bill Baker, Medill Barnes, Allan Bisset, Jerry Curran, Sam Houston and Barry Trader. In 1968, Metropolitan TV Company sold KOA-AM-TV to General Electric for $10 million. General Electric sold the KOA and KOAQ radio stations to A. H. Belo Corporation in