In 1975, the station's format was changed to all talk, making WWDB become the first full-time talk station in the United States that was exclusively on the FM dial. On-air talk personalities included Irv Homer, Bernie McCain, Frank Ford, Phil Valentine, Tom Marr, and Bernie Herman. The station called itself "WWDB, The Talk Station." The station carried no syndicated shows, as is common today. Around the clock, all talk programming and news updates came from the WWDB staff. Meanwhile, the AM station, 1340 WHAT, continued as one of Philadelphia's leading stations aimed at the African-American community.