Description
CX4 Marine VHF Antenna 1.2m

The CX4 Marine VHF Antenna 1.2m is a professional fibreglass VHF antenna manufactured by AC Antennas for reliable marine and land-based VHF communication. It is a compact 3 Marine dB omnidirectional antenna suitable for fishing vessels, workboats, RIBs, pilot boats, offshore support vessels and leisure craft.
With a 146–162.5 MHz frequency range, 150W power rating, UHF female connector and IP68 ingress protection, the CX4 is designed for dependable VHF performance in demanding marine environments.
CX4 Marine VHF Antenna Applications
The CX4 is suitable for primary VHF installations, replacement antenna upgrades and professional marine communication systems where a compact, durable and stable-performing antenna is required.
- Commercial fishing vessels
- Workboats and service vessels
- RIBs and small craft
- Leisure boats and yachts
- Pilot boats and harbour vessels
- Marine VHF radio installations
The CX4 is supplied with an N239F mounting nut and features a 1″-14 TPI male thread with ISO 228/1-G1 female interface. This allows the antenna to be used with suitable AC Antennas mounting hardware and adaptor combinations.
Common Mounting Configurations
N298F Mast Mount
Common option for rail, mast and wall-mounted installations.
N220F Mast Mount
May require an N280-04F thread adaptor depending on installation thread requirements.
N286F Four Way Ratchet Mount
Often used with an N280-04F adaptor where thread conversion is required.
Performance and Installation Notes
The CX4 is a 3 Marine dB omnidirectional antenna, making it a practical choice for vessels where reliable all-round VHF coverage is more important than maximum theoretical range. Its lower gain pattern is well suited to small and medium vessels that experience movement in real sea conditions.
For best performance, mount the antenna as high and as clear as practical, with good separation from other antennas, metal obstructions and high-power transmitting equipment.
Technical Specifications
| Frequency Range | 146–162.5 MHz |
| Design | Coaxial dipole |
| Pattern | Omnidirectional |
| Gain | 0 dBd / 2.15 dBi / 3 Marine dB |
| Max Input Power | 150W |
| VSWR | < 1.5:1 |
| Connector | UHF Female |
| Length | 1.26 m / 4.14 ft |
| Weight | 0.50 kg / 1.10 lbs |
| Material | Fibreglass |
| Ingress Protection | IP68 |
| Thread | 1″-14 TPI male / ISO 228/1-G1 female |
| Mounting | N239F mounting nut included |
Contact F&C Marine for advice on CX4 antenna installations, mounting hardware, thread adaptors and marine VHF antenna systems.
Helpful Resources
- 3dB vs 6dB Marine VHF Antennas
- Marine VHF Antenna Cable Guide
- VHF Antenna Height vs Range
- Marine VHF Antenna Mounting Guide
- Marine Antenna Thread Sizes Guide
- View Marine VHF Antennas
- AC Antennas Manufacturer Website
For CX4 Marine VHF Antenna 1.2m supply or replacement enquiries, confirm the exact model or part reference against the equipment already installed. Installation requirements for the CX4 Marine VHF Antenna 1.2m should be checked against the vessel or shore-side system before ordering.
























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