VL-2901-D496, NMO, Low-Profile, Dual Band, VHF/UHF Mobile Antenna, Amateur Radio, 145-148 MHz (2m) & 420-450 MHz (70 cm)

Model VL-2901-D496 is a small Amateur Dual Band, VHF/UHF Antenna (145-148 MHz, 2m and 420-450 MHz, 70cm Amateur Radio Bands), designed for mobile platforms (vehicles) with height restrictions. Measuring only approximately 4" (10 cm) in diameter and 6" (15.3 cm) tall, this antenna is a very efficient Low Profile radiator. When installed properly on the metal chassis of a vehicle, the VL-2901-D496 will perform comparably with a full size 1/4 wave monopole antenna. For optimum operation, install near the center of a flat surface, such as the roof of a truck's cab or van with minimum approximately flat dimensions of 40" x 40" (1m x 1m). We do not recommend the use of a magnetic mount or a trunk bracket mount.

The VL-2901-D496 Amateur VHF Antenna features a DC shunt connection to the chassis to help protect its attached radio from limited Electro-Static Discharge (you will measure a short circuit when measuring across its terminals with a multimeter).

An electrically conductive chassis/ground plane is required for the proper operation of the VL-2901-D496 Antenna. If the intended mounting surface is non-conductive, such as a fiberglass roof, line the underside of the non-conducting surface with a thin foil of any convenient metal (Aluminum is widely used). Ensure that the NMO mount contacts the chassis/ground plane/foil securely.

• Frequency range: 144-148 MHz and 420-450 MHz
• Coverage: Omni-directional, low azimuthal ripple (1 dB)
• Polarization: Linear, Vertical
• Gain: +4 dBil (when mounted on a large ground plane - asymptotic gain)
• Nominal Impedance: 50 ohm
• Input Power: 50 Watts CW
• VSWR: under 3.0 (VHF), under 2.0 (UHF) (see typical VSWR measurement graph above)
• Connector: NMO, Female
• Dimensions: 10 cm (4") average OD x 15.3 cm (6") h -- [OD: 9.2 cm (3.6") at top/11.2 cm (4.4") at base]
• Mounting: NMO connector
• Operating Temperatures: -40C to +85C
• Weight: 300 g / 0.6 lbs
• Shipping Weight: 400 g / 0.9 lbs (shipped individually)

• Requires a ground plane (normally mounts on a metal body)
• Specifications and prices are subject to change without notice

This product is compatible with the following Antenna Accessories:

• NMO Mount and Cable Assembly for Mobile Radio Antennas