WMMO signed on August 19, 1990 as one of only two radio stations in the world broadcasting from a fully-enclosed transmit antenna. The station broadcast from the top of Orlando's SunBank Center, a skyscraper with a pyramid-like spire atop the building. The station derives its call letters from WMMS in Cleveland, Ohio. The founding programmer and chief engineer, Cary Pall, was reported to have been a fan of WMMS, and secured the call letters to honor the longtime Cleveland rock station.[1] WMMS and WMMO, however, are owned by different companies, and have been owned by different companies throughout their histories despite several ownership changes for each station. The two stations also feature different radio formats.
