RFI - CD28-41-50 148-175MHz Ground Independent Mopole - MBC Base (Tapered S/S Radiator)
$225.71
GST Inclusive. Discounts and Shipping calculated at checkout.
Quantity
Pickup available from the Mobile Systems Showroom: 1/14 Portside Drive, Mount Maunganui. We will notify you when your order is ready for collection.
In stock, ready to be shipped
RFI CD28-41-50 148–174MHz Ground Independent Mopole Antenna – MBC Base
The RFI CD28-41-50 Ground Independent Mopole Antenna is a premium VHF mobile antenna engineered for reliable performance across the 148–174MHz frequency range, delivering a genuine 3dB improvement over a standard 1/4-wave whip. Designed for professional two-way radio systems, it delivers consistent communications for transport, utilities, emergency services, local government, agriculture, forestry, mining, and industrial fleets.
Featuring RFI's patented Ground Independent Mopole technology, this antenna provides dependable omnidirectional performance without relying on a vehicle's metal body as a ground plane. This makes it an ideal solution for installations where traditional roof-mounted antennas are impractical, including bull bars, mirror brackets, roof racks, canopies, and specialist vehicles.
Why Choose the RFI CD28-41-50?
Built to withstand demanding working environments, the CD28-41-50 combines proven RF performance with exceptional durability.
Key Features
- Covers the full 148–174MHz VHF band means one antenna serves the whole range, for installers working across multiple licensed channels.
- Patented Ground Independent Mopole technology means reliable performance from bull bars, mirror brackets, canopies, and other non-standard mounting positions.
- 3dB gain over a 1/4 wave whip means stronger signal for fleet vehicles without needing a ground plane.
- Tapered stainless steel whip means excellent flexibility and resistance to knocks and bends.
- Rugged thermoplastic base assembly means the matching circuit is virtually indestructible in daily fleet use.
- Field-tuneable with supplied chart means you can dial in the best VSWR for your exact operating frequency within the band.
Applications
- Commercial fleet communications
- Transport and logistics
- Utilities and civil construction
- Forestry, agriculture, and mining
- Emergency services and local government
- Security operations
What's in the Box
- 1 x RFI CD28-41-50 Mopole antenna with MBC base
- Not included: coaxial cable and connector, sold separately
Complete Your Setup
This antenna's MBC base doesn't include a cable or connector. Talk to us and we'll help you choose the right cable length and connector for your installation.
Key Specifications
| Brand | RFI |
| Model | CD28-41-50 |
| Frequency range | 148–174MHz |
| Gain | 3dB over a 1/4 wave whip |
| Tuned bandwidth / VSWR | 4MHz at <1.5:1 (8MHz at <2.0:1), field-tuneable |
| Power handling | 50W |
| Whip length | 1340mm |
| Whip material | 17-7PH tapered stainless steel, moulded base coil assembly |
| Mounting | MBC base, included |
| Cable and connector | Not included, sold separately |
Download the RFI CD28 Series specifications (PDF)
Other Options in This Series
Need a different mount type? See CD28-41-70 (threaded stud mount, no cable, same band).
Video
No product video currently available for this model.
Ground Independent Performance
Unlike conventional quarter-wave antennas, the CD28-41-50 does not require a conductive vehicle roof to achieve excellent performance. This allows installation on bull bars, mirror brackets, gutter mounts, roof racks, canopies, toolboxes, fibreglass bodies, and specialist service vehicles.
Why Buy From Mobile Systems Limited?
Mobile Systems Limited supplies and installs professional radio communication systems throughout New Zealand. Our experienced team provides:
- Vehicle antenna selection
- Mobile radio installations
- Fleet communication solutions
- Antenna tuning and VSWR testing
- Radio programming
- System upgrades
- Ongoing servicing and technical support
Whether you're fitting out a single vehicle or managing a nationwide fleet, we'll ensure your communications system delivers dependable performance in the field.
Frequently Asked Questions
What frequencies does the CD28-41-50 support?
The antenna is designed for licensed VHF radio systems operating between 148MHz and 174MHz.
What is a Ground Independent Mopole antenna?
Ground Independent Mopole technology allows the antenna to perform effectively without relying on the vehicle body as a ground plane, making it ideal for non-traditional mounting locations.
Is this antenna suitable for heavy vehicles?
Yes. Its rugged construction makes it ideal for trucks, agricultural machinery, construction equipment, utilities, and commercial fleets.
Does the antenna need tuning?
Yes. The antenna is field tuneable to optimise performance for your operating frequency and installation.
Is this suitable for New Zealand licensed radio networks?
Yes. The 148–174MHz frequency range covers many licensed VHF land mobile radio systems used throughout New Zealand.
Can Mobile Systems Limited install and tune this antenna?
Yes. We supply, install, tune, and test RFI antennas and complete two-way radio systems for commercial, industrial, and government customers throughout New Zealand.
Specifications
RFI - CD28-41-50 148-175MHz Ground Independent Mopole - MBC Base (Tapered S/S Radiator)
$225.71