Warm cartridges of ALMA band 1 receivers

In this image, several of the warm cartridges of the band 1 receivers are lined up at the Front-end Testing Lab in Taichung, Taiwan, ready to be taken to Chile and installed on the Atacama Large Millimetre/submillimetre Array (ALMA). The band 1 receivers pick up radio waves between 6 and 8.5 mm in length, the longest wavelength that ALMA is able to measure.