Elite Class DualBand 2m 70cm Antenna 2m70cm57DX-2C

Exceptional gain, F/B, and G/T on both bands are achieved with DualBand 2m 70cm Antenna 2m70cm57DX-2C. Super-weak contest, DX or EME signals won’t be a problem with 17 elements on 2m and 40 elements on 70cm on a 12m boom antenna. Ultimate design with full 3D Electromagnetic Simulation Software.

 

DualBand 2m 70cm Antenna 2m70cm57DX-2C Appearance:

 

What does 2m70cm57DX-2C mean?

• 2m – 2m band – 144-145 MHz with low SWR and exceptional gain and G/T
• 70cm – 70cm band – frequency range 432 to 434 MHz with low SWR and super gain.
• 57 – 57 elements on the antenna. 17 elements on 2 meters and 40 elements on 70cm. Comparable with two monoband antennas on a 12m boom.
• DX – Intended for use in DX hunting or catching super weak EME signals.
• 2C – 2Connectors. Each band has its own connector.

With less than 50 W with this 2m70cm57DX-2C antenna, you can work many EME stations.

 

2m Electrical Specifications of DualBand 2m 70cm Antenna 2m70cm57DX-2C

Frequency Range: 144 – 145 MHz
Free Space Forward Gain: 17.4 dBi
Front-to-Back Ratio: 31 dB
3 dB Horizontal Beamwidth: 26.7°
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 choke (current balun)
Connector: “N”
Coupling to 70cm: -40dB

 

Dipoles View on DualBand 2m 70cm Antenna 2m70cm57DX-2C

 

Mechanical Specifications 2m70DX57-2Conn on 2m band

Number of Elements: 17
Element Diameter: 8 mm Aluminum tube
Dipole Diameter: 8 mm Hard Copper tube plastic coated
Longest Element: 1035 mm
Element Mounting Position: Below the boom
Balun and Connector: Included

 

DualBand 2m 70cm Antenna 2m70cm57DX-2C 2m azimuth radiation pattern

 

70cm Electrical Specifications of DualBand 2m 70cm Antenna 2m70cm57DX-2C

Frequency Range: 432 – 434 MHz
Free Space Forward Gain: 20.05 dBi
Front-to-Back Ratio: 36 dB
3 dB Horizontal Beamwidth: 15.6°
Polarization: Horizontal
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.2
Maximum Power Input: 850 W
Matching Method: Direct feed through common mode choke (current balun)
Connector: “N”
Coupling to 2m: -30dB

 

DualBand 2m 70cm Antenna 2m70DX57-2Conn 70cm Azimuth Radiation Pattern

 

70cm Mechanical Specifications of DualBand 2m 70cm Antenna 2m70cm57DX-2C

Number of Elements: 40
Element Diameter: 4 mm Aluminum rod
Dipole Diameter: 8 mm Hard Copper tube, plastic coated
Longest Element: 340 mm
Element Mounting Position: Above the boom
Balun and Connector: Included 

 

Common Mechanical Specifications

Boom Length: 11.52 m
The overall number of elements: 57
Boom Size: Tapered Boom 20x20mm, 30x30mm, 40x40mm different wall thickness
Number of Boom Pieces: 8
Guy Rope Support: Yes, Included. Four ropes
Mounting Mast Diameter: 43 – 70 mm 1-11/16″ – 2-3/4″ OD
Survival Wind Speed: 150 km/h
Transportation Length: 1.82 m
Net Weight: 17kg
Gross Weight: 19kg

The old name of the antenna was 2m70DX57-2Conn

 

Antennas-Amplifiers Product Benefits. A Major advance in antenna design.

• F/B and G/T superiority.

All antennas have been calculated using state-of-the-art full 3D EM modeling software, including the influence of the boom, bracket, baluns, and connectors. The performance of antennas designed using these techniques is exceptional, far better than antennas designed using the EZNEC program.

• No tuning antennas. 

Before dispatch, we assemble and test each antenna’s characteristics. No need to tune any element to get a perfect SWR on the intended frequency range. Everything is pre-tuned.

• Easy to set up. 

Everything is labeled, just put a number to a number. Everything is included in the box: Antenna, balun, bracket, and guy rope support if needed. Yours is to assemble and have fun!

• Mechanical properties.

We believe that our antennas are the world’s strongest and are mechanically constructed much better than any antennas from other manufacturers.

 

Similar dual-band 2m and 70cm antennas are here