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RFI HPM-RM-075078 VHF Roof Mount Antenna, 75-77.3 MHz, -3 dBq

RFI HPM-RM-075078 VHF Roof Mount Antenna, 75-77.3 MHz, -3 dBq

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Item ID:
168015990
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Options/MPN:
HPM-RM-075078
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RFI HPM‑RM‑075078 VHF Roof Mount Antenna (75.0-77.3 MHz) is supplying factory tuned to cover 75 to 77 MHz at a VSWR of less than 1.8:1.
Regular price $48.45
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Product Description

The RFI HPM‑RM‑075078 VHF Roof Mount Antenna is a compact, factory‑tuned ¼‑wave antenna covering 75 – 77.3 MHz with a VSWR < 1.8:1 and a gain of ‑3 dBq. Measuring less than 440 mm in height and designed to fit the industry‑standard MB9 roof‑mount base, it solves clearance issues where a conventional quarter‑wave whip cannot be installed. A moulded lower section and helically wound stainless‑steel upper whip deliver exceptional flexibility and durability for harsh industrial and mining environments.

Product Features:

  • The helically loaded ¼-wave radiator provides full VHF performance in a low-profile form factor under 440 mm tall.
  • It is factory tuned for 75 – 77.3 MHz (other HPM-RM models cover 70 – 87 MHz and 148 – 174 MHz bands).
  • The moulded base section and flexible stainless-steel whip withstand impacts, constant vibration, and tight overhead clearances.
  • The standard MB9 roof-mount interface enables quick, secure installation on vehicles and fixed sites.
  • A typical gain of –3 dBq with a VSWR < 1.8:1 ensures dependable signal quality across the targeted band.

Application Areas:

  • It is ideal for mining trucks, loaders, and underground machinery operating beneath low ceilings or in tunnel networks.
  • It is suitable for fleet cars, utilities, and emergency-service vehicles requiring a low-profile VHF antenna without compromising performance.
  • It performs reliably in industrial plants and warehouses where cranes, pipes, or gantries limit antenna height.
  • It benefits rural and remote communications systems that need rugged, flexible antennas for VHF voice and data links.
  • It is perfect for any roof-mount installation restricted by overhead obstacles where a standard quarter-wave whip is impractical.

In the Box:

  • 1 × RFI HPM‑RM‑075078 VHF Roof Mount Antenna (75 – 77.3 MHz).

Documents:

RFI HPM-RM Series Antenna - Datasheet

Product Specifications

MPN HPM-RM-075078
Antenna application Vehicle Antenna
Antenna cable type No cable
Antenna features Omnidirectional
Antenna port connectors No connector
Antenna type Ground Dependent
Brands RFI
Cable and connector Not included, order separately
Coverage type Omni-directional
Frequency band VHF Mid Band 66-88 MHz
Frequency mhz 75-78
Height 3
Installation type External mounting
Length 40
Low pim No
Max frequency mhz 78
Max gain dbd dbi -3
Mimo support No
Min frequency mhz 75
Min gain dbd dbi -3
Mount supported Wall mount, Roof mount
Mount supported detailed MB9 base
No of antenna ports 1
Nominal gain dbq -3
Polarisation Vertical
Power w 25
Technologies supported VHF
Technology type VHF
Tuned bandwidth Full
Tuning Full Band
Vswr <1.8:1
Whip length mm 400mm
Whip material ABS, brass and stainless steel
Width 3