Diamond F22 144-174MHz, 6.7 dB

The Diamond F22 is a commercial-grade, high-performance VHF monoband base station antenna engineered to provide exceptional long-range signal propagation and robust voice modulation across professional marine, land mobile, and amateur VHF networks. Utilizing a high-efficiency 2 x 7/8-wave (2 x 7/8λ) phased electrical configuration, this premium vertical base antenna focuses radiation toward the horizon to yield an impressive 6.7 dB gain rating. It serves as a vital infrastructure asset for command centers, maritime port authorities, emergency dispatch operations, and high-volume B2B telecommunication supply networks across Europe.

The structural framework is built to withstand severe environmental and atmospheric exposure over years of continuous outdoor deployment. Encased in a heavy-duty, randomized Fiber Reinforced Polymer (FRP) fiberglass radome sleeve, the antenna isolates its internal silver-plated radiating elements from moisture, UV degradation, and corrosion. Measuring 3.2 meters in length and weighing 1.3 kg, the aerodynamic mechanical profile supports extreme wind velocity ratings up to 50 m/sec, ensuring absolute operational readiness and signal stability during severe storm fronts or high-altitude coastal exposures.

To establish a stable, vibration-proof electrical path, the base section is equipped with a heavy-duty MJ (UHF-Female / SO-239) precision mechanical connector, maintaining a nominal characteristic impedance of 50 Ohms and a low Voltage Standing Wave Ratio (VSWR) of less than 1.5:1 to safe-keep transmitter output stages. The system supports high continuous power thresholds up to 200 Watts and is supplied with strong-retention mounting hardware engineered to clamp securely onto standard industrial antenna masts ranging from 30 mm to 62 mm (φ) in diameter, supplemented by integrated structural ground-plane radials for optimal matching.