Radio National celebrates 100 years
Sydney radio station 2FC aired its first test broadcast on December 5 1923, before officially going to air on January 9, 1924. 2FC stood for Farmer and Company. It held its name for the first few years while 2SB (now ABC Radio Sydney) changed to 2BL, as the two were thought to be too similar in sound.
Source: radiotoday.com.au