lˈɪsənɪŋ tə ɹˈeɪdɪˌoʊ bɹˈɔːdkæsts fɹʌm ˈʌðɚ kˈʌntɹiz hˌævɪŋ bɪkˌʌm pˈɑːpjʊlɚɹ ɪn bʌlɡˈɛɹiə baɪ ðə lˈeɪt nˈaɪntiːnhˈʌndɹɪd twˈɛnti z, ɐ ɡɹˈuːp ʌv ˌɛndʒɪnˈɪɹz ænd ˌɪntəlˈɛktʃuːəlz fˈaʊndᵻd ɹˈɑːdnoʊ ɹˈeɪdɪˌoʊ"nˈeɪɾɪv, ɔːɹ hˈoʊmlənd, ɹˈeɪdɪˌoʊ"ˌɔn θˈɜːɾi mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi wɪððɪ ˈeɪm ʌv pɹəvˈaɪdɪŋ sˈoʊfiə wɪð ɪts ˈoʊn ɹˈeɪdɪˌoʊ stˈeɪʃən.
Listening to radio broadcasts from other countries having become popular in Bulgaria by the late 1920s, a group of engineers and intellectuals founded Rodno radio ("Native, or homeland, radio") on 30 March 1930 with the aim of providing Sofia with its own radio station.