KTBC-TV aired its first television broadcast on Thursday, November 27, 1952, becoming the first television station in Austin and Central Texas. It was originally owned by the Texas Broadcasting Company (from whom the call letters are taken), which was in turn owned by then-Senator and future U.S. President Lyndon B. Johnson and his wife Lady Bird, alongside KTBC radio (590 AM and 93.7 FM). Lady Bird Johnson used the money from her family inheritance to purchase KTBC-TV, she remained active with her radio station until she was in her eighties which led her to become the first president's wife to have become a millionaire on her own. It carried all four major networks at the time: ABC, CBS, NBC and the now-defunct DuMont Television Network. However, it was a primary CBS affiliate. In its early history, it carried roughly 65% of CBS's schedule; NBC and ABC roughly split the remaining coverage in half.