The Diamond BC103 is a professional-grade, high-performance VHF base station vertical antenna engineered for omnidirectional coverage across the critical 144 to 174 MHz frequency band. Protecting its active radiating elements within a heavy-duty, weather-sealed white fiberglass radome, this premium monoband antenna is designed to withstand the harshest outdoor conditions. It is the perfect solution for amateur radio operators (2m band), commercial land-mobile dispatch networks, marine communications, and public safety frequencies requiring reliable, long-distance communication links.
Standing at a compact and highly manageable physical length of 1.25 meters, the BC103 utilizes an efficient electrical design that functions as a 1/2-wave or 5/8-wave antenna depending on the chosen operating portion of the cut-to-frequency chart. This premium architecture yields an impressive signal gain ranging from 2.15 to 3.2 dBi, focusing your RF power toward the horizon to bypass regional obstructions. Built to support high-power base stations, the antenna boasts a maximum power handling capacity of up to 300 Watts PEP, preventing thermal overload during extended transmission cycles.
The mechanical construction of the Diamond BC103 is engineered to meet strict commercial standards. It is rated to survive extreme wind velocities of up to 60 meters per second (approx. 135 mph) with minimal physical deflection. The base section terminates in a heavy-duty M-J connector (SO-239 / UHF Female), designed to interface with standard PL-259 coax runs. Complete with an integrated mounting pipe and heavy-duty U-bolt hardware, the antenna clamps securely to standard support masts with a diameter of 30 to 62 mm, allowing for rapid, non-slip vertical installation.
Key Features
- Wide VHF Coverage: Tunable frequency range of 144 to 174 MHz, covering ham, marine, and commercial bands.
- Fiberglass Radome: High-strength, weather-proof fiberglass sleeve protects internal elements from corrosive environments.
- High Gain Performance: Delivers 2.15 to 3.2 dBi of omnidirectional gain for extended signal range.
- Robust Power Handling: Rated for up to 300 Watts of maximum power (continuous PEP).
- Severe Weather Rated: Heavy-duty mechanical structural integrity certified to withstand winds up to 60 m/s.
- Low-Loss Connector: Standard base M-J (UHF Female / SO-239) connector ensures clean impedance matching.
- Complete Mounting Kit: Includes premium aluminum brackets and U-bolts for masts from 30 mm to 62 mm.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Diamond Antenna |
| Model Designation | BC103 |
| Product Type | VHF Monoband Base Station Vertical Antenna |
| Frequency Range | 144 – 174 MHz (Tunable) |
| Antenna Electrical Type | 1/2 Wave or 5/8 Wave (depending on tuned frequency) |
| Signal Gain | 2.15 – 3.2 dBi |
| Maximum Power Rating | 300 Watts PEP |
| Nominal Impedance | 50 Ohms |
| Voltage Standing Wave Ratio (VSWR) | Less than 2.0:1 |
| Connector Type | M-J (SO-239 / UHF Female) |
| Max Wind Speed Resistance | 60 m/sec (approx. 216 km/h / 135 mph) |
| Accepted Mast Diameter | φ30 – φ62 mm |
| Physical Length | 1.25 m |
| Net Weight | 1.4 kg (including basic mounting brackets) |
Package Content
- 1x Diamond BC103 VHF Base Station Radome Antenna
- 1x Heavy-Duty Base Bracket Assembly Pipe
- 2x Heavy-Duty Stainless Steel Mounting U-Bolts & Clamps
- 1x Frequency Cutting / Tuning Chart
