16 August 1924
On 16 August 1924 the first radio licence in SA was issued to Dr J. van Rensburg of Carnarvon. The first station in South Africa was put up by the South African Railways in Johannesburg on December 29, 1923. The Scientific and Technical Club in Johannesburg took over on July 1, 1924. The Cape and Peninsula Broadcasting Association started a similar service in Cape Town, on September 15, 1924. The Durban organization began broadcasting on December 10, 1924. Financial support came from listener's licenses like the first one issued to Dr J. van Rensburg.  
References

Mishkind, B., "This is the International Section of The Broadcast Archive",from old radio,[Online],Available at www.oldradio.com [Accessed: 13 August 2013]| Potgieter, D.J. et al. (eds)(1970). Standard Encyclopaedia of Southern Africa, Cape Town: NASOU, v. 2, p.528.