Photo by the CASS receiver group

The 21-cm multibeam receiver at the Parkes 64-m telescope was used to carry out the HI Parkes All Sky Survey (HIPASS) , the HI survey of the Zone of Avoidance (HIZOA) as well as 21-cm pulsar surveys of the Galactic Plane, The picture above shows cryogenics engineer Pat Sykes with the 13 horns of the 21-cm multibeam receiver frontend.