ZNB began broadcasting in 1936 on 5900 kHz with 250 watts and operated as a communication facility for the government of Bechuanaland. Test transmissions of station announcements and music recordings resulted in requests for regular programming from Africa, the U.S.A., Europe and Japan.
However programming had to be discontinued due to copyright infringements. After the positive response from local listeners, broadcasting was reintroduced with programming by the South African Broadcasting Corporation.
ZNB operated with communication traffic in addition to broadcasting entertainment and information programs. The regular frequency of 5900 kHz was used in addition to 8230 kHz at times.
The station ended the broadcasting of entertainment programs on the 30th September 1963.
The above QSL card verified the distant reception on the 1st December 1949 from a dxer in Stockholm, Sweden.