Radio 5DN began operating as an experimental station in 1924 on a wavelength of "about 200 metres" (1500 kHz),[2] with official services beginning on 24 February 1925.

Hume bought his transmitter, and some other equipment from radio pioneer Lance C. Jones, who ran station 5BQ in Westbourne Park.

The origin of that call sign has been lost in the mists of time, but it may be the result of an early spelling alphabet (A for Arthur, C for Charlie, D for Don, etc.).

The transmitter and studios were set up in the Hume family mansion, Peltonga, on Park Terrace (now Greenhill Road), in the suburb of Parkside.

Hume installed landlines from the Elder Conservatorium and the University of Adelaide, allowing live broadcasts of concerts and lectures.

Big local names of 5DN in the 40s and 50s included long time Breakfast announcer, Mel Cameron, Vic Braham, Ron Sullivan, Phyllis Pullman, Alan Sanders and Barry Hall.

One of the station's most popular locally produced programs of the late 1940s and 50s was "Under the Stars", written for 20 years by 5DN's chief scriptwriter, Merv Hill.

In 1969, 5DN introduced Adelaide's first Open Line talkback programme, beginning the move to the News/Talk format that saw the station dominate the ratings in the 1970s and 80s.

Jeremy Cordeaux joined the station in 1976 to host the daytime show, with Neil Adcock moving to a Sunday night spot.

But for a long time 5DN's ratings record was held by late night Open Line host, Roger Mac.

Led by Paul Linkson as General Manager other broadcasters who featured on 5DN 972 from 1980 include Leigh Hatcher, Vincent Smith, Murray Nicoll, Gary Rivett, Kevin Crease, Ken Dickin, Judith Barr, Ken Cunningham, Gary Bau, David Hookes, Trevor Ford, Bob Byrne, Noel Yeates, Geoff Jay, Alex Zastera, Gerard Stone, Dave Waterman, Joan Hanger, Ray Fewings, Andrew Pearce, Chris Glenn, Dom Rinaldo, Murray "Buzzard" Olds, Terry Clark, Nan Witcomb and Jeff Medwell.

So Radio 1323 was launched with a format featuring old 5DN personalities and a mixture of talk and Easy Listening music in July 1993.

However the reincarnation failed to recapture the glory days of the late 1970s and '80s and ARN closed it down in December 2004, leasing the licence to Melbourne based broadcaster SEN, the Sports and Entertainment Network.