3SER Casey Radio is operated by the South Eastern Radio Association Incorporated and broadcasts at a frequency of 97.7 FM to the municipalities of Casey and Greater Dandenong, as well as parts of the Cities of Kingston, Frankston, and Bayside
The station commenced broadcasting more than 35 years ago with its first test transmission taking place between on May 6-12, 1984 as Market City Radio or 3MCR on 88.3FM.
The studio was originally located in the upper floor of the basketball stadium at JC Mills Reserve in Dandenong.
Test broadcasts were conducted for one week, four times a year, and continued until the station received its full-time license in May 1991.
Between its inception and gaining a full-time licence, the station moved from Dandenong to the Fountain Gate Regional Shopping Centre located in Narre Warren, in the late 1980s after being offered a $5000 grant and a rent-free site for five years by the centre’s then owner, Overland Construction Corporation. Additionally, a $10,000 loan was provided by the City of Berwick.
On March 19, 1990, a letter to the editor of the Dandenong Journal from the station’s founding president, Fred Harrison, asserted that the relocation from Dandenong to Narre Warren was mainly driven by the transmission and reception of our signal.
“With FM, signals are received basically by line of sight and because of this our transmitter site at the basketball stadium at Mills Reserve was in a depression and therefore our signal had no hope of getting to our prescribed broadcast areas, those being the Cities of Dandenong, Springvale, Berwick and the Shire of Cranbourne,” Mr Harrison said.
In 1996 the station relocated to self-funded premises in Webb Street, Narre Warren
In September 2002, the station relocated to Cranbourne East where it celebrated more than two decades on air.
In May 2026, the station relocated to Keysborough. The studio features state-of-the-art equipment and software.
3SER Casey Radio has a proud history of diversity in broadcasting and still has several current presenters involved with the organisation who were apart of early days during test transmissions.