The RFI CD28-41-73 VHF Mopole Antenna is a ground-independent, broadband solution that delivers a genuine 3 dB gain across the full 148 - 175 MHz band. Supplied with a low-profile threaded stud mount and a factory-installed 5 m low-loss coaxial cable (unterminated), it can be fitted quickly on mirrors, gutters, trunk lips, or any other tight mounting location. A patented end-fed matching circuit sealed in a virtually indestructible thermoplastic housing, together with a flexible, black powder-coated stainless-steel whip, ensures dependable performance for fleet, public-safety, and industrial vehicles in the harshest environments.

Product Features:

• The Mopole architecture is ground-plane independent and offers a 3 dB improvement in signal levels over a conventional quarter-wave whip.
• Broadband coverage of 148 - 175 MHz with 4 MHz bandwidth at 1.5 : 1 VSWR (8 MHz at 2.0 : 1), field-tuneable with the supplied chart for optimal match.
• A patented end-fed matching circuit is encapsulated in a high-impact thermoplastic body, delivering a stable 50 Ω impedance and outstanding durability.
• The tapered 17-7 PH stainless-steel whip is finished with a tough black powder-coat, giving excellent resistance to corrosion, vibration, and low-clearance impacts.
• A threaded stud mount is pre-assembled to a 5 m low-loss coaxial cable (connector not included), allowing fast, custom termination during installation.
• Designed, manufactured, and patented in Australia (AU #596830 & #656793) for reliable service in extreme operating conditions.

Application Areas:

• It is ideal for fleet trucks, service vans, and logistics vehicles that need broadband VHF coverage but lack a large roof ground plane.
• It is suitable for public-safety, fire, and EMS units requiring a rugged antenna that can mount securely on mirrors, roof gutters, or trunk lips.
• It performs reliably on mining, construction, and agricultural machinery operating in environments with heavy vibration, dust, and physical impacts.
• It benefits urban delivery and rural logistics vehicles where overhead obstacles limit antenna height and ground-plane availability.
• It is perfect for marine and recreational off-road vehicles that require a corrosion-resistant, impact-tolerant whip and ground-independent performance.

In the Box:

• 1 x RFI CD28-41-73 VHF Mopole Antenna Whip (148 - 175 MHz, 3 dB gain, factory-tuned centre).
• Threaded stud mount pre-assembled to the whip.
• 5 m low-loss coaxial cable (unterminated, connector not included).

Documents:

RFI CD28 Antenna - Datasheet RFI CD28-41 Antenna - Installation Guide