WZUM (1590 AM)

During the 1970s, WZUM was a freeform AOR outlet, operating from 10:00 a.m. until sunset, (broadcasting polkas in the morning from sunrise).

Returned to the WZUM call letters, the station changed its format to smooth jazz, but went dark after just one year.

Upon purchase of the station, Starboard converted it entirely to Catholic programming under the Relevant Radio branding.

In recent years, WZUM applied for an upgrade to its signal, which would have given the station minimal night power.

By May 23, 2009, the station dropped its easy listening format for Gospel and picked up the branding "1590 WZUM, The Promise".