KTSB (1170 AM) is a commercial radio station in Tulsa, Oklahoma. It is owned by Griffin Communications and airs a sports radio format. The station carries local sports talk. KTSB studios and offices are located across from Guthrie Green in Downtown Tulsa, and it transmits from a three-tower facility located along East 11th Street (Route 66) in an undeveloped area of East Tulsa. KTSB is a clear channel Class A station broadcasting at 50,000 watts, the maximum power for American AM stations. The station uses a non-directional antenna by day, heard over much of Eastern Oklahoma and parts of Kansas, Arkansas and Missouri. It provides secondary coverage as far north as Wichita, as far east as Fayetteville, Arkansas and as far west as the fringes of the Oklahoma City area. Under the right conditions, it can be heard across nearly all of Oklahoma's densely populated area, as well as Springfield, Fort Smith and the outer suburbs of Kansas City. At night, power is fed to all three towers in a directional pattern to protect the other Class A station on 1170 AM, WWVA in Wheeling, West Virginia. Even with this restriction, KTSB's nighttime signal can be heard over much of the Central United States and well into the Rocky Mountains with a good radio. History Station founding Founded by E. H. Rollestone, KTSB first signed on the air on June 23, 1926, as KVOO, the "Voice Of Oklahoma." At the time, the 1,000-watt transmission facility was located in Bristow, Oklahoma. Rollestone, a young oil millionaire, had previously founded another station in Bristow known as KFRU, which had already been sold to Stephens College in Columbia, Missouri. KVOO was moved to Tulsa on September 13, 1927, after being partially purchased by William G. Skelly. Skelly later purchased the entire company on June 28, 1928. In 1933, radio legend Paul Harvey began his radio career at KVOO. Country music heritage From the 1970s until May 2002, the station was primarily known for its country music heritage, as well as being nationally famous for Western swing music. KVOO hosted such musicians as Bob Wills and his Texas Playboys, Johnnie Lee Wills and Billy Parker, who has won awards as country music disc jockey of the year. One of the places in Tulsa made famous by KVOO Radio was Cain's Ballroom, located on Main Street. Cain's Ballroom was the performing place for Bob Wills,