B105 (call sign 4BBB) is a commercial FM radio station broadcasting in Brisbane, Queensland, Australia, on a frequency of 105.3 MHz, and is part of Southern Cross Austereo's Hit Network. The station has undergone numerous branding changes over the years; it was branded as B105 following its conversion from AM to FM. This lasted until a co-branding as Hit 105.3 B105, then as Hit B105 (dropping the "B" shortly after) and finally back to B105 in July 2020. The station began life as 4BK, commencing transmission in 1930 on the AM band, initially on the frequency 1290 kHz before changing to 1300 kHz on 1 Sep 1935 (to accord with the new Australian 10 kHz channel spacing raster). Again the implementation by Australia of the 9 kHz channel spacing raster developed by the ITU and formalised in the 1975 Geneva Plan necessitated 4BK moving to 1296 kHz on 23 November 1978. More information...
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