2m-70cm 12/25elm Dual Band Antenna 6.87m

Electrical Specifications 2m

Frequency Range: 144 – 145 MHz
Free Space Forward Gain: 15.6 dBi
Front-to-Back Ratio: 33 dB
3 dB Horizontal Beamwidth: 32.4°
Polarization: Horizontal
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.2
Maximum Power Input: 1500 W
Matching Method: Direct feed through common mode balun
Connector: “N”
Coupling to 70cm: -40 dB

Mechanical Specifications 2 m

Number of Elements: 12
Element Diameter: 8 mm Aluminum tube
Dipole Diameter: 8 mm Hard Copper tube
Longest Element: 1035 mm
Element Mounting Position: Below the Boom
Balun and Connector: Included

Electrical Specifications 70 cm

Frequency Range: 432 – 434 MHz
Free Space Forward Gain: 18.4 dBi
Front-to-Back Ratio: 27 dB
3 dB Horizontal Beamwidth: 20.6°
Polarization: Horizontal
Nominal Input Impedance: 50 Ohms
Maximum Power Input: 850 W
Matching Method: Direct feed through common mode balun
Connector: “N”
Coupling to 2m: -30 dB

Mechanical Specifications 70 cm

Number of Elements: 25
Element Diameter: 4 mm Aluminum rod
Dipole Diameter: 8 mm Hard Copper tube
Longest Element: 340 mm
Element Mounting Position: Above the Boom
Balun and Connector: Included

Common Mechanical Specifications

Boom Length: 6.87 m
Boom Size: Tapered Boom 20x20mm, 30x30mm, 40x40mm
Number of Boom Pieces: 5
Guy Rope Support: Yes, Included
Mounting Mast Diameter: 43 – 70 mm 1-11/16″ – 2-3/4″ OD
Survival Wind Speed: 150 km/h
Transportation Length: 1.49 m
Net Weight: 9 kg
Gross Weight: 11 kg

144 and 432 MHz Two Band Yagi Antenna 2m70DX37-2Conn. Long Boom and Extreme Gain Appearance

Vertical Stacking Distance 2750 mm

Two Antennas Gain on 2 m 18.1 dBi (+2.5 dB)
Two Antennas Gain on 70 cm 21.5 dBi (+3.1 dB)

Horizontal Stacking Distance 2950 mm

Two Antennas Gain on 2 m 18.1 dBi (+2.5 dB)
Two Antennas Gain on 70 cm 21.45 dBi (+3.05 dB)

The best 2 meters and 70 cm dual-band low noise Yagi antenna 2m70DX37-2Conn, bracket, and guy rope view

Four Antennas in “H” configuration 2750 x 2950 mm

Gain on 2 m  20.6 dBi (+5 dB)
Gain on 70 cm 24.5 dBi (+6.1 dB)

Radiation Patterns:

The Best Long Boom Low Noise 2m and 70cm Dual Band Yagi Antenna 2m70DX37-2Conn 2m Azimuth Radiation Pattern

70 cm Extreme Gain Low Noise 144 MHz and 432 MHz Dual Band Yagi Antenna 2m70DX37-2Conn 70cm Azimuth Radiation Pattern.