KATHREIN's CA5-400 400 – 512 MHz Yagi antenna. The five-element Yagi antenna is intended for use in professional fixed-station applications in the 400 – 512 MHz band. It features balanced feed systems with no capacitors for superior performance in icing conditions, internal balun, and dipole feedpoint sealed within the boom assembly, anodized aluminum construction, heavy cast aluminum, and stainless steel hardware, entire antenna at DC ground potential. Factory tuned: