The biggest 70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX

The ultimate design and features to satisfy all EME and DX fans. 70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX. Maximum Gain and maximum G/T will allow you to hear even the weakest DX and EME signals. And with a good configuration, to win any EME and DX contest. Super gain and low noise characteristics, and high suppression of all side lobes. Devoted to EME and DX hunting. The ability to change the polarization is an added advantage over competitors with only one polarization. A single H/V coaxial relay is sufficient, but consider using a Polarization Switch H-V-RHCP instead.

 

70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX Appearance:

 

What does 70cmCROSS50DX mean?

• 70cm – 70cm DX band – 432-434 MHz
• CROSS – CROSS Yagi antenna has horizontal and vertical elements – separated on a single boom, the antenna is mounted in a “+” format
• 50 – 50 elements, 25 elements for horizontal polarization, and 25 elements for vertical polarization
• DX – For use in the DX part of the band 432-434MHz for EME and DXing

 

Electrical Specifications of 70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX

Frequency Range: 432-434 for DX and low noise EME
Free Space Forward Gain: 19.7 dBi
Front-to-Back Ratio: 36 dB
-3 dB Horizontal Beamwidth: 20.5°
-3 dB Vertical Beamwidth: 21°
Polarization: Horizontal, Vertical, and RHCP with Polarization Switch H-V-RHCP
Distance Between Dipoles: 173mm
Degrees: 90°
Isolation Between Antennas: More than 28dB
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.2
Maximum Power Input: 2 x 850W for Hpol and Vpol, and 1700W for RHCP
Matching Method: Direct feed through common mode choke (current balun)
Connectors: 2 x “N”

 

70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX Azimuth Radiation Pattern

 

Mechanical Specifications of 70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX

Number of Elements: 50 (25+25 elements)
Element Diameter: 4mm Aluminum rod
Dipole Diameter: 8 mm Hard Copper tube, plastic-coated. Hairpin match
Longest Element: 340mm
Balun and Connectors: Included
Single antenna length: 6542mm
Boom Length: 6.76m
Boom Size: Tapered Boom 40×40 mm, 30×30 mm, 20×20 mm
Turning Radius: 3.9m
Number of Boom Pieces: 5
Guy rope support: Yes, included
Fiberglass mounting mast diameter: 40 – 50mm
Clamp: 2 x M8 Stainless Steel
Survival Wind Speed: 150km/h
Net Weight: 8.2kg
Gross Weight: 9.9kg
Transportation Length: 2m

 

Stacking distances for 70cm 50elements CROSS UltimateDX EME Antenna 70cmCROSS50DX

Horizontal and vertical stacking distances are identical.

Distance,  Gain,  Gain benefit,  Front/Side lobe gain Horizontal/Vertical

1650mm, G=25 dBi, (+5.3dB), -16.8dB H / -16dB V, Maximum suppression of all side lobes
1700mm, G=25.15dBi (+5.45dB), -15.4dB H / -15dB V, More gain, very solid F/S
1740mm, G=25.25dBi (+5.55dB), -14.6dB H / -14.2dB V, Solid F/S, Solid gain
1780mm, G=25.35dBi (+5.65dB), -13.9dB H / -13.5dB V
1830mm, G=25.45dBi (+5.75dB), -13.1dB H / -12.7dB V
1890mm, G=25.55dBi (+5.85dB), -12.1dB H / -11.75dB V Maximum gain regardless of side lobes

Above are 6 possible stacking variants in “H” configuration. You can choose any one.

 

To change the polarization in a system with CROSS antennas, it is best to use the 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP. Horizontal, Vertical, or RHCP.

For maximum reception quality and reception of the weakest DX and EME signals, install the EME2-432 70cm low noise preamplifier with T/R Relay Switches.

 

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 antennas and are mechanically constructed much better than any antennas from other manufacturers.

 

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