In 1946, shortly after World War II, the "Boston Herald-Traveler" newspaper purchased WHDH, by this time again an independent station. In 1948, the station moved its transmitter site from Saugus to Needham, west of Boston, where the station would be able to increase power to 50,000 watts with a directional signal aimed east to protect KOA and other stations on 850. The station also expanded into FM broadcasting on March 31, 1948 with the sign-on of WHDH-FM (94.5 FM, now WJMN).