The National Channel of All India Radio in radio's 3 tier system was originally conceived as the first stage i.e. National System with a broadcast of an 18 hrs. per day. But for various reasons the channel was limited to night time service taking the National Programmes and covering 65% of area and 76% of population of the country.
Presently it broadcasts programmes of entertainment and music with hourly News Bulletins for the entire country from 06.50 PM in the evening to 06.12 AM in the morning. This is the only channel available after most of the stations closed down.
The programmes of National Channel are radiated by One Megawatt Transmitter from centrally located place i.e. Nagpur(Mtrs. 191.6 M - 1566 Khz.), 500 KW, from Kolkata from 11.00 PM(Mtrs. 264.5 M - 1134 Khz.) and 20 KW Transmitter at Delhi (Mtrs.246.9 M - 1215 Khz.). Further FM support has been given from Lasauli (Himachal Pradesh) (Mtrs. 107.2 Mhz).
The languages of broadcast are Hindi, English and Urdu apart from some music from other Indian languages. National channel's office cum studios is situated at Todapur(West Delhi).
100% Andhra Pradesh, Bihar, Chhatisgah, Chandigarh, Delhi, Goa, Haryana, Jharkhand, Karnataka, Madhya Pradesh, Manipur, Meghalaya, Orissa, Pondicherry, Tripura, Uttar Pradesh, Uttaranchal.
50% & More Assam, Maharashtra, Rajasthan, Tamil Nadu.
30% FM - Himachal Pradesh
A national service planned, developed and operated by the Ministry of Information & Broadcasting under the Government of India. Sound broadcasting started in India in 1927 with the proliferation of private radio clubs.
The operations of All India Radio began formally in 1936, as a government organisation, with clear objectives to inform, educate and entertain the masses. When India attained Independence in 1947, AIR had a network of six stations and a complement of 18 transmitters.
The coverage was 2.5% of the area and just 11% of the population. Rapid expansion of the network took place post Independence. AIR today has a network of 214 broadcasting centres with 143 medium frequency(MW), 54 high frequency (SW) and 139 FM transmitters. The coverage is 91.37% of the area , serving 99.13% of the people in the largest democracy of the world.
AIR covers 24 Languages and 146 dialects in home services. In Externel services, it covers 27 languages; 17 national and 10 foreign languages.