Amateur radio repeaters may even use commercially packaged repeater systems that have been adjusted to operate within amateur radio frequency bands, but more often amateur repeaters are assembled from receivers, transmitters, controllers, power supplies, antennas, and other components, from various sources.
Amateur radio repeaters can utilize pre-packaged repeater systems designed for commercial use, but these are frequently assembled from individual components like receivers, transmitters, controllers, power supplies, antennas, and more, obtained from different suppliers.