B105 is an Australian commercial FM radio station on a frequency of 105.3 MHz which is licensed to Brisbane, Queensland


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About b105

This radio station is part of Southern Cross Austereo's Hit Network and has suffered quite a lot of branding changes over the years. 

When the radio station had its conversion from AM to FM it was branded as B105, but it only lasted this way until a co-branding as Hit 105.3 B105. After that it changed again as Hit B105, only to lose the "B" shortly after. In July 2020 it finally went back to B105.

B105 was actually born in 1930 as 4BK and started broadcasting on the AM band, firstly on the frequency 1290 kHz and then changing to 1300 kHz in 1935 according to the new Australian 10 kHz channel spacing raster. 

Australia implemented the 9 kHz channel spacing raster which was developed by the ITU. It was formalised in the 1975 Geneva Plan. This made 4BK move  to 1296 kHz in 1978.

The radio station was purchased in 1988 by the Austereo group from Hoyts (its then owner). The new owner wanted to use B105 as a vehicle to bid for an FM conversion licence. They won the FM licence so in 1990 the station changed its callsign to 4BBB and started airing on a frequency of 105.3 MHz with the on-air name B105. But, unlike the previous AM callsign, its 4BBB callsign was not used on-air except during test broadcasts.

The Austereo group transformed the premises of the 4BK studio complex when the FM conversion license was granted. This 4BK station was an AM radio whose facilities were located at 16 Campbell Street Bowen Hills. Those premises were converted to an FM facility and began broadcasting as B105 FM in 1990.

Until July 2000, the B105 studio complex remained at the Bowen Hills location. Then, B105 and sister station Triple M were relocated by Austereo into new combined premises at 309 North Quay, Brisbane. This new complex was the first in Australia to use the now defunct Klotz Digital audio system. This was revolutionary at the time, but still was changed during a 2016 studio upgrade with Axia Fusion.

B105 moved from North Quay studios in June 2019 into new studios at The Barracks on Petrie Terrace.

Going back to its history, from 1990 to 2006, B105  became the highest rating station in Brisbane. It got only beaten in one ratings survey in 1994 by AM station 4KQ.

Southern Cross Media purchased in April 2011 the Austereo Group for more than $700 million. Since then it has been operated under the name Southern Cross Austereo.

Again,in 2015, B105 was rebranded as Hit 105 and five years later, in 2020, Hit 105 rebranded back to B105.

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b105 is a radio station from Brisbane and belongs to the Australia radio network.

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