ABC Radio National
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| Broadcast area | Australia |
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| Frequency | Various (FM and AM), DAB+, online |
| First air date | 5 December 1923 |
| Format | News, talk |
| Language(s) | English |
| Callsign meaning | RN - Radio National |
| Owner | Australian Broadcasting Corporation |
| Sister stations | ABC Classic FM, ABC Local Radio, ABC NewsRadio, Triple J |
| Webcast | Live stream |
| Website | abc |
ABC Radio National, known on-air as RN, is an Australia-wide Public Service Broadcasting radio network run by the Australian Broadcasting Corporation.
Radio National broadcasts national programming in subjects that include news and current affairs, the arts, social issues, science, drama and comedy. Some programs are relayed on Radio Australia, the ABC's international free-to-air shortwave service.
Radio National currently has 327 transmitter sites and covers over 98% of the permanently inhabited areas of Australia. Remote areas are served by satellite service.
All radio programs are available for live streaming over the Internet, and most (excluding drama, poetry and music) as audio-on-demand, or for download as MP3s for at least four weeks after broadcast. Some programs are available as MP3s going back to 2005, when Radio National commenced podcasting. About 25% of shows, mainly the flagship weekly shows, have written transcripts archived back to 1996.
From 1928, the National Broadcasting Service, as part of the federal Postmaster-General's Department, gradually took over responsibility for all the existing stations that were sponsored by public licence fees ("A" Class licences). The outsourced Australian Broadcasting Company supplied programs from 1929. In 1932 a commission was established, merging the original ABC company and the National Broadcasting Service. It is from this time that Radio National dates as a distinct network within the ABC, in which a system of program relays was developed during the subsequent decades to link stations spread across the nation.
Radio National's Sydney station 2FC first test broadcast on 5 December 1923 and officially went to air on 9 January 1924. 2FC stood for Farmer and Company, the original owner of the station before the ABC took it over.
The origins of the other stations in the network were:
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