VHF 1/4-Wave Roof-Mount Antenna, 136–144 MHz

The Motorola HAD4006A is a VHF mobile antenna engineered for reliable two-way radio communication across the 136–144 MHz frequency range.

Its 1/4-wave, unity-gain design provides dependable omnidirectional coverage, making it well suited for commercial fleets, public-safety vehicles, utilities and other mobile communication applications.

Designed for permanent roof or trunk installation, this genuine Motorola antenna is an excellent solution for compatible VHF mobile radios that do not require integrated GPS capability.

Key Features

• VHF operating range of 136–144 MHz

• 1/4-wave antenna design

• Unity gain (0 dBd)

• Through-hole roof or trunk installation

• Omnidirectional signal coverage

• Vertical radiation pattern

• Designed for non-GPS radio installations

• Genuine Motorola accessory

• Motorola part number HAD4006A

Reliable VHF Mobile Communications

The HAD4006A is optimized for radios operating within the 136–144 MHz portion of the VHF band. Its omnidirectional radiation pattern provides balanced coverage around the vehicle, supporting dependable communication during mobile fleet and field operations.

The vertical signal pattern is especially beneficial in urban environments where buildings and other structures may interfere with radio signals.

Permanent Through-Hole Installation

This antenna is intended for permanent installation through a suitable metal vehicle surface. Mounting it near the center of a metal roof generally provides the strongest available ground plane and the most consistent radiation pattern.

Professional installation is recommended to ensure proper mounting, weather sealing, cable routing and overall antenna performance.

Radio Compatibility

The HAD4006A is compatible with select Motorola VHF mobile radios, including appropriately configured MOTOTRBO, APX and legacy Motorola mobile radio models.

Compatibility depends on the radio’s exact frequency split and antenna connection. Confirm that the radio operates within the antenna’s supported VHF frequency range before ordering.

Important Frequency Notice

Motorola technical documentation identifies the HAD4006A for operation from 136–144 MHz. Some Motorola storefront listings show a broader upper limit, so customers requiring operation above 144 MHz should confirm compatibility before purchase.

For systems operating from 146–150.8 MHz, the Motorola HAD4007A may be the appropriate alternative. The HAD4008A covers 150.8–162 MHz, while the HAD4009A covers 162–174 MHz.

Non-GPS Antenna

The HAD4006A supports VHF radio-frequency operation only and does not include an integrated GPS antenna. Radios requiring GPS functionality need a compatible combination GPS/VHF antenna system.

Why Choose the Motorola HAD4006A?

The HAD4006A combines genuine Motorola quality with a frequency-specific 1/4-wave design and permanent vehicle installation. It is a practical choice for organizations that need reliable VHF mobile communications without integrated GPS functionality.

For assistance confirming radio compatibility or selecting the correct antenna frequency range, contact Delmarva Communications before ordering.