The Diamond SE50 Marine Antenna 2m/70cm is a commercial-grade, high-integrity vertical base station radiator precision-engineered to deliver secure, long-range voice and data synchronization over punishing maritime and coastal environments. Characterized by its specialized radial-free architecture, this premium dual-band stick antenna completely eliminates protruding side elements, ensuring that it will not snag or get in the way when handling lines, rigging, or ropes on a ship deck. It stands as an essential operational procurement asset for commercial cargo vessels, port authority infrastructure, offshore industrial platforms, and high-volume B2B radiocommunication hardware distribution networks looking to source authentic, marine-hardened telemetry instruments.
The internal RF architecture of the Diamond SE50 delivers exceptional broad-spectrum efficiency across core VHF and UHF frequencies. Operating natively on the 144 / 430MHz (2m / 70cm) bands, the antenna features an advanced phasing configuration: a 6/8 wave C-Load at 144MHz providing a crisp 4.5dB gain, and a triple-stacked 3×5/8 wave C-Load at 430MHz delivering an impressive 7.2dB gain to pierce through heavy maritime atmospheric attenuation. Engineered for high-integrity transmission cycles, it accommodates a maximum power rating of 100W FM (Total), maintaining a nominal system impedance of 50 ohms and an ultra-stable efficiency curve with a VSWR of less than 1.5:1 to safeguard connected transceivers from harmful reflected power loads.
Constructed to survive continuous saltwater spray and extreme multi-season marine environments, the structural framework features an ultra-rugged Fiber Reinforced Polymer (FRP outershell) glass fibre tube that protects the active inner brass elements from corrosion. The heavy-duty brass/chrome plated mounting tube is permanently attached to the main fiberglass radome body, eliminating weak mechanical joints. All mounting brackets are treated with a special protective anti-corrosion coating, while all remaining attachment hardware is made from premium, marine-grade stainless steel. Boasting a structural rated wind velocity of 60m/sec, this 2.0m length vertical antenna handles extreme maritime storms cleanly while registering a balanced, low-torque weight of just 0.8kg.
While engineered for maritime vessel deployment, the SE50 functions beautifully as an unobtrusive land-based station antenna for coastal ports, residential buildings, or industrial facilities where traditional grounding radials are structurally impractical or visually restrictive. The bottom feedpoint terminates in a high-retention MJ (PL-SO239 UHF Female) connector with deep-threaded engagement to prevent water ingress. Designed for immediate out-of-the-box system alignment and absolute field deployment readiness, the included heavy-duty mounting clamp hardware accommodates an accepted mast diameter ranging from 30mm to 62mm to guarantee a swift and stable fleet deployment pipeline.
| Technical Specification Parameter | Specifications |
|---|---|
| Product Brand Designation | Diamond Antenna (Original Genuine Japanese Factory Line) |
| Hardware Model Designation | SE50 / SE-50 Marine Class Series |
| Primary Component Classification | Dual-Band Radial-Free Marine & Base Station Vertical Antenna |
| Active Operational Frequencies | 144 MHz VHF Band & 430 MHz UHF Band (2m / 70cm Dual Alignment) |
| Antenna Phasing Element Type | VHF: 6/8 Wave C-Load | UHF: 3x 5/8 Wave C-Load Architecture |
| System Forward Radiated Gain | VHF (144MHz): 4.5 dB | UHF (430MHz): 7.2 dB Signal Focus |
| Maximum Input RF Power Capacity | 100 Watts (100W) Continuous FM Transmitter Output (Total Envelope) |
| Voltage Standing Wave Ratio Efficiency | VSWR < 1.5:1 Target Resonance Calibration |
| System Characteristic Impedance | 50 Ohms Nominal Transmission Line Standardization Path |
| Primary Structural Insulation | Fiber Reinforced Polymer (FRP Outershell) Glass Fibre Tube Radome |
| Hardware Metal Component Profile | Chrome-Plated Brass base tube, Coated brackets, Stainless Steel fittings |
| Maximum Rated Wind Velocity | Up to 60 Meters per Second (60 m/sec) Dynamic Load Survival |
| Primary Input Feed Connector | MJ Connection Type (Standard SO-239 PL UHF Female Jack Port) |
| Total Physical Assembly Length | 2.0 Meters (2.0m Continuous Unobtrusive Stick Profile) |
| Net Operational Antenna Mass | 0.8 kg (800 grams) Low-Torque Lightweight Mast Balance |
| Accepted Rigging Mast Diameters | 30 mm to 62 mm Flexible Clearance Bracket Anchoring |
| Verified Hardware Compatibility Scope | PL259 UHF male coaxial lines, marine VHF transceivers, dual-band base station transceivers, port infrastructure mounts, and vessel antenna brackets |
| Primary Fleet Utility Purpose | Turnkey maritime vessel outfitting, anti-snag port communication tracking, harsh saltwater environment deployment, and final-stage transmitter circuit reflection protection |
