3AW's original broadcast frequency was 1425 kHz and changed to 1280 kHz on 1 September 1935 as part of a national reshuffle of the radio broadcasting spectrum. On 23 November 1978 the station changed to 1278 kHz with the introduction of 9 kHz spacing on the AM band. Due to poor reception problems, at 7:15 a.m. on 1 May 2006, 3AW swapped with its sister station Magic to its present frequency of 693 kHz. The station's broadcast signal originates from a transmitter in Werribee.