WSDK (1550 kHz) is a commercial AM radio station licensed to Bloomfield, Connecticut, and serving the Hartford metropolitan area.

WSDK uses a brokered programming plan, where hosts pay for time on the station and they may use their shows to seek donations to their ministries.

At night, to avoid interfering with other stations on 1550 kHz (a Canadian clear channel frequency), WSDK reduces power to 2,400 watts.

Flood control work on Trout Brook adjacent to the transmitting tower resulted in damage to the ground system.

In 1977, the station changed ownership and the callsign was switched to WMLB, which was a combination of the first names of the three owners: Mary, Lou and Barry.

The Walt Disney Company purchased the station from Hibernia in 2000, and continued to operate from the Franklin Avenue location until 2004, when the studios were moved to 160 Chapel Road in Manchester, Connecticut.