By day, KATZ is powered at 6,000 watts. But at night, to protect other stations on 1600 AM from interference, power is reduced to 3,500 watts. It also uses a directional antenna with an eight-tower array. Its transmitter is on Rock Springs Road at McKinley Avenue in Washington Park, Illinois.[2] Programming is also heard on 25-watt FM translatorK227DS at 93.3 MHz. KATZ is licensed by the FCC to broadcast a HD digital (hybrid) signal.[3]
In 1957, KATZ's ownership was transferred from the original owner, Bernice Schwartz, to Rollins Broadcasting. In 1960, Laclede Radio Inc. purchased the station. Laclede maintained control of the station until 1986. Inter Urban Broadcasting, a minority-owned and local company, purchased KATZ 1600 and its sister station KATZ-FM.[5]