W1XPW's conversion to FM was reported to have been completed as of May 13, 1939, with the station now operating with 1,000 watts on 43.4 MHz. Following an irregular series of test transmissions, the station inaugurated regular programming on October 2,  with an initial schedule of 2 to 10 p.m. daily.
W1XPW's conversion to medium wave was completed by May 13, 1939, with the station now broadcasting at 1,000 watts on 43.4 MHz. Following a series of test transmissions, the station began its regular programming schedule on October 2,  with an initial daily broadcast period from 2 to 10 p.m.