ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti, ɪt bɪkˌeɪm ðə flˈæɡʃɪp stˈeɪʃən fɚðə ʃˈɔːɹtlˈɪvd pɹəɡɹˈɛsɪv bɹˈɔːdkæstɪŋ sˈɪstəm ɹˈeɪdɪˌoʊ nˈɛtwɜːk.
In 1950, it became the flagship station for the short-lived Progressive Broadcasting System radio network.