Early TV broadcasting, Brisbane by ABC Archives on Flickr.

Via Flickr:
Experiments with television broadcasting systems took place in Australia as early as the 1930s. Here Thomas M. B. Elliott, under the auspices of Dr. Valentine McDowall is pictured with his experimental equipment at the convict-built old Windmill in Brisbane in 1934

Thanks to “QldRadioTVPioneers” for the following additional info on this image

‘Newspapers (Telegraph 1930 July), indicate that the installation of the television apparatus commenced in July 1930. Experiments began in l931, with good results. The gentleman pictured is Thomas M. B. Elliott, under the auspices of Dr. Valentine McDowall. Both are accredited as being the pioneers of radio, television and radiography in Queensland. The station call sign was VK4CM, Observatory Tower, Wickham Terrace, Brisbane.’

ABC Reference ID: abc.net.au/photo/DP040080