The RBC operated two main services, the English-language General Service (or National Network), aimed at the white audience, and the African Service, broadcasting in English, Shona and Ndebele, aimed at black listeners. The RBC also established three community stations with a multi-racial audience, Radio Jacaranda (Salisbury), Radio Matopos (Bulawayo) and Radio Manica (Umtali). In 1975, an Ndebele language service operating out of Bulawayo, known as Radio Mthwakazi, was established, using the "Big Bertha" transmitter previously used to jam the BBC's broadcasts from Francistown.