ɪts fɹˈiːkwənsi wʌz tʃˈeɪndʒd tə wˈʌn θˈaʊzənd θɹˈiːhˈʌndɹɪd nˈaɪnti kˈeɪ ˌeɪtʃzˈiː ɪn mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wˈʌn, æz ɐ ɹɪzˈʌlt ʌvðə nˈɔːɹθ ɐmˈɛɹɪkən ɹˈiːdʒənəl bɹˈɔːdkæstɪŋ ɐɡɹˈiːmənt.
Its frequency was changed to 1390 kHz in March 1941, as a result of the North American Regional Broadcasting Agreement.