Mortimer found a close ally in Nils Granlund, who managed WHN radio and broadcast live jazz performances from NYC nightclubs, and by 1939, Mortimer had his own radio program on WMCA, a station owned by Flamm.
Mortimer teamed up with Nils Granlund, who ran WHN radio and presented live jazz performances from NYC clubs, and by 1939, Mortimer had secured his own airtime on WMCA, a station controlled by Flamm.