 It broadcasts on 1100 AM, a clear channel frequency reserved for Class A WTAM in Cleveland.Because radio waves travel farther at night, WHLI must be off the air at sunset to protect WTAM.WHLI first signed on the air on July 15, 1947 along with FM sister station WHNY, licensed to Paul and Elias Godofsky, the owners of WLIB in New York City from 1942 to 1944.