Description
Marine VHF Antenna CX3 5/8-1 Overview
The Marine VHF Antenna CX3 5/8-1 from AC Antennas is a professional 2.63m fibreglass VHF antenna designed for demanding marine and land-based communication systems. It provides 6dB marine gain across 156.0–162.5 MHz and is fitted with an N female connector for professional RF installations.
The CX3 5/8-1 is a heavy-duty collinear omnidirectional antenna designed for commercial vessels, offshore craft, workboats, harbour systems and professional marine communication networks where long-range VHF performance and installation reliability are important.
Marine VHF Antenna CX3 5/8-1 Applications
- Commercial vessel VHF radio systems
- Offshore support vessels and workboats
- Fishing vessels and pilot boats
- Long-range marine VHF communication systems
- Harbour, marina and fleet radio installations
- Land-based VHF communication systems
- Professional installations requiring an N female connector
High Gain 6dB Marine VHF Performance
The CX3 5/8-1 provides 3 dBd / 5.15 dBi gain, commonly expressed as 6dB marine gain. This makes it suitable for installations where increased VHF communication range is required from a high, stable mounting position.
Compared with compact 3dB antennas, a 6dB marine VHF antenna provides a flatter radiation pattern, which can help extend communication range when installed correctly on suitable vessels.
For more detail, read our 3dB vs 6dB Marine VHF Antennas Guide.
Built for Professional Marine Installations
The CX3 5/8-1 is manufactured using premium materials to help prevent galvanic corrosion. The radiating elements are made from brass, and AC Antennas crimping technology provides a stronger mechanical build-up for harsh marine and land-based environments.
The antenna has IP68 ingress protection, fibreglass construction, 150W power handling and a 200 km/h survival wind speed rating. The N239F swivel nut mount is included.
Marine VHF Antenna Height and Range
Marine VHF range is strongly affected by antenna height, cable quality, installation position and surrounding obstructions. A 6dB antenna such as the CX3 5/8-1 should be mounted as high and clear as practical for best line-of-sight communication performance.
For more detail, read our VHF Antenna Height vs Range Guide and Marine VHF Antenna Range Guide.
Technical Specifications
- Product: CX3 5/8-1
- Part Number: 130003-T
- Product Group: VHF
- Design: Collinear coaxial dipole
- Pattern: Omnidirectional
- Frequency Range: 156.0–162.5 MHz
- Bandwidth: 6.5 MHz
- Nominal Impedance: 50 Ohm
- Maximum Input Power: 150W
- Gain: 3 dBd / 5.15 dBi / 6dB marine gain
- VSWR: < 1.5:1
- Polarisation: Vertical
- DC Shorted: Yes
- DC Grounded: Yes
- Connector: N Female
- Length: 2.63m / 8.63ft
- Sections: 1
- Weight: 0.60kg / 1.32lbs
- Survival Wind Speed: 200 km/h / 55 m/s / 124 mph
- Wind Load at 160 km/h: 53N
- Material: Fibreglass
- Colour: White
- Operating Temperature Range: -40°C to +60°C
- Ingress Protection: IP68
- Thread: 1″ 14TPI male / ISO 228/1-G1 female
- Mounting: N239F swivel nut included
Mounting Compatibility
The CX3 5/8-1 uses a dual-thread mounting arrangement with a 1″ 14TPI male thread and ISO 228/1-G1 female thread. The N239F swivel nut mount is included, making it suitable for compatible marine antenna mounting systems.
For compatibility advice, see our Marine Antenna Thread Sizes Guide and Marine Antenna Mount Compatibility Guide.
Marine VHF Antenna Installation
For best performance, install the CX3 5/8-1 vertically and mount it as high and clear as practical. Because this is a 2.63m high-gain antenna, correct mounting position and secure installation are especially important.
- Mount vertically for correct polarisation
- Use suitable marine-grade coaxial cable
- Keep cable runs protected and correctly routed
- Avoid crushed, damaged or sharply bent cable
- Seal external RF connections correctly
- Ensure the mounting structure is suitable for a 2.63m antenna
- Inspect the antenna, mount and cable periodically
For more installation guidance, see our Marine VHF Antenna Mounting Guide.
Recommended Marine VHF Antenna Cable
Correct cable selection is important for VHF performance. Poor cable, water ingress and incorrectly fitted connectors can reduce communication range even when the antenna itself is correctly specified.
Read our Marine VHF Antenna Cable Guide for cable selection advice.
CX3 5/8-1 vs CX3 5/8
| Model | Connector | Gain | Length | Mounting |
|---|---|---|---|---|
| CX3 5/8 Marine VHF Antenna | UHF Female | 6dB marine gain | 2.63m | Dual-thread system |
| CX3 5/8-1 Marine VHF Antenna | N Female | 6dB marine gain | 2.63m | Dual-thread system with N239F included |
Shipping Information
Due to the antenna length exceeding 2 metres, additional courier charges may apply. Please contact our sales team before ordering for an accurate delivery quotation.
Related Marine Communication Guides
- Marine VHF Antenna Information Guide
- 3dB vs 6dB Marine VHF Antennas
- Marine VHF Antenna Range
- VHF Antenna Height vs Range
- Marine VHF Antenna Cable Guide
- Marine VHF Antenna Mounting Guide
- Marine Antennas Explained
Downloads
Download CX3 5/8-1 Datasheet PDF
Frequently Asked Questions
What is the Marine VHF Antenna CX3 5/8-1 used for?
The CX3 5/8-1 is designed for professional marine and land-based VHF communication systems requiring 6dB marine gain, an N female connector and long-range performance.
What frequency range does the CX3 5/8-1 cover?
The CX3 5/8-1 covers 156.0–162.5 MHz.
What connector does the CX3 5/8-1 use?
The CX3 5/8-1 uses an N female connector.
What gain is the CX3 5/8-1 antenna?
The antenna provides 3 dBd / 5.15 dBi gain, commonly expressed as 6dB marine gain.
How long is the CX3 5/8-1 antenna?
The CX3 5/8-1 is 2.63m / 8.63ft long.
Is the CX3 5/8-1 waterproof?
Yes. The CX3 5/8-1 has an IP68 ingress protection rating.
Is a mount included with the CX3 5/8-1?
Yes. The N239F swivel nut mount is included.
Does this antenna require special shipping?
Because the CX3 5/8-1 is over 2 metres long, courier surcharges may apply. Please contact sales before ordering for an accurate delivery quotation.
Manufacturer Information
Manufactured by AC Antennas.
Shop Marine Communication Products
For Marine VHF Antenna CX3 5/8-1 supply or replacement enquiries, confirm the exact model or part reference against the equipment already installed. Installation requirements for the Marine VHF Antenna CX3 5/8-1 should be checked against the vessel or shore-side system before ordering. F&C Marine can help confirm Marine VHF Antenna CX3 5/8-1 compatibility where existing equipment details are available.
For Marine VHF Antenna CX3 5/8-1 supply, compatibility or installation advice, contact F&C Marine.
Related F&C Marine guide
Reviews
There are no reviews yet.