The Diamond Original X50NA Dualband Base/Repeater Antenna is a high-performance vertical antenna designed to support amateur radio operators, repeater builders, and fixed station installations that require reliable communications on both 2 meters (144–148 MHz) and 70 centimeters (435–450 MHz). Featuring a durable fiberglass radome and corrosion-resistant stainless-steel hardware, this antenna is built for long-term outdoor deployment and outdoor weather resistance. With gain figures of approximately 4.5 dB on the 2 m band and 7.2 dB on the 70 cm band, the X50NA delivers medium-gain performance that enhances both signal transmission and reception compared with basic VHF/UHF base antennas. These gain characteristics make it an excellent choice for applications such as local repeater coverage, base station communication, fixed mount installations, and general VHF/UHF communications where strong consistent performance is required. Rated for up to 200 W of RF power and designed with a VSWR typically below 1.5:1 across both operating bands, the X50NA maintains efficient power transfer and minimal signal reflection for clean operation under moderate power loads. Its factory-adjusted design eliminates the need for onsite tuning, simplifying setup on masts, rooftops, or tower installations. The antenna's Type-N female connector interfaces smoothly with low-loss coax feed lines and compatible mast mounts, and its rugged construction and DC-grounded design protect connected equipment from static and environmental electrical events. Accepting mast diameters from approximately 30 mm to 62 mm, the X50NA supports a wide range of mounting configurations while delivering reliable dual-band performance. Compact yet capable, with a total height of around 5.6 ft (1.7 m) and wind resistance up to 135 mph (no ice), the Diamond X50NA represents a versatile and dependable choice for amateur radio base stations, repeater systems, and other fixed RF communications installations where durability and consistent performance are key.