RFI CD28-37-73 138-163MHz Ground Independent Mopole - MBC Base c/w 5m Cable
RFI CD28-37-73 138-163MHz Ground Independent Mopole - MBC Base c/w 5m Cable
VHF Ground Independent Mopole Antenna, 138–163MHz, 3dB, MBC Base with 5m Cable
The RFI CD28-37-73 is a broadband VHF Mopole antenna delivering a genuine 3dB improvement over a standard 1/4-wave whip. Supplied with MBC base and a 5m RG58C/U cable already fitted.
Overview
The CD28-37-73 is a Ground Independent Mopole antenna covering 138–163MHz, ideal for "alternative" mounting positions such as gutter, mirror, or trunk mounts where a full ground plane isn't available.
Using a patented matching circuit, it's an end-fed dipole combining a durable thermoplastic housing with a flexible tapered stainless steel whip resistant to knocks and bends. Field testing shows a 3dB improvement in received signal level compared with a 1/4-wave whip (pattern testing shows 1.5-2dB, equivalent to 1.5-2dBi), thanks to a lower radiation angle from the ground independent design.
This version comes pre-terminated with a 5m length of 8058 RG58C/U cable, so there's no separate cable to source.
Key Features
- 3dB gain Mopole design means stronger signal than a standard unity-gain whip, without needing a ground plane.
- Ground independent design means reliable performance from gutter, mirror, or trunk mounts, for vehicles where a full ground plane isn't practical.
- Supplied with 5m RG58C/U cable means no separate cable to source, for a faster, simpler install.
- Flexible tapered stainless steel whip means resistance to knocks and bends without permanent damage.
- Rugged thermoplastic housing means the matching circuit is virtually indestructible in daily fleet use.
- Unique termination method means simplified installation and re-cabling in the field.
Applications
- Commercial and government fleet vehicles
- Emergency service vehicles
- Utility and transport communications
- Alternative mounting positions where a full ground plane isn't available (gutter, mirror, trunk mounts)
What's in the Box
- 1 x RFI CD28-37-73 Mopole antenna
- MBC base with 5m RG58C/U cable fitted
Key Specifications
| Brand | RFI |
| Model | CD28-37-73 |
| Frequency range | 138–163MHz |
| Gain | 3dB over a 1/4 wave whip |
| Construction | Flexible tapered stainless steel whip, thermoplastic housing |
| Mounting | MBC base, included |
| Cable | 5m 8058 RG58C/U, fitted |
Download the RFI CD28 Series specifications (PDF)
Download the RFI CD28-37-5x installation sheet (PDF)
Other Options in This Series
Need this band without the cable? See CD28-37-50 (138-163MHz, MBC base, no cable).
Video
No product video currently available for this model.
Why Buy From Mobile Systems Limited?
Mobile Systems Limited supplies professional two-way radio systems and antenna solutions throughout New Zealand from our base in Mt Maunganui, Bay of Plenty. Our team provides:
- Fleet communication system design
- Vehicle antenna selection
- Professional installations
- Antenna testing and optimisation
- Ongoing servicing and technical support
Whether you're fitting out one vehicle or an entire fleet, we'll help you select the right antenna solution for dependable long-term performance.
Frequently Asked Questions
Does this antenna include a cable?
Yes, this version comes with a 5m RG58C/U cable already fitted, saving you sourcing one separately.
Does this need a large ground plane to work?
No, the ground independent design means it performs reliably without a large metal ground plane, useful for alternative mounting positions like gutters, mirrors, and trunk mounts.
What is the benefit of the 3dB Mopole design?
Field testing shows a 3dB improvement in received signal level over a standard 1/4-wave whip, thanks to the antenna's lower radiation angle.
Can Mobile Systems Limited install this antenna?
Yes. We supply, install, test, and support RFI antennas and complete two-way radio systems throughout New Zealand.