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430-440 MHz Wideband...
70cm Wideband CROSS Antenna 70cmCROSS46W for...

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Base Antenna 380-480 MHz PMR446 TETRA Sirio GP 430 LB
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430-440 MHz Wideband 46 elements CROSS Antenna 18.1dBi 70cm46CROSS (AA)

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Manufacturer: Antennas Amplifiers

Reference: AA-1742-70cmCROSS46W-2367

Condition: New product

Country of origin:

Serbia

430-440 MHz Wideband 46 elements CROSS Antenna 18.1dBi 70cm46CROSS (AA)

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70cm Wideband CROSS Antenna 70cmCROSS46W for Super LEO, the best 46 elements full range 430 – 440 MHz 70cm Wideband CROSS Antenna 70cm46CROSS for any radio modes like CW, SSB, FM, Q65, FT8, and all kinds of communications like EME, DX-ing, Contesting, FM work, and LEO satellites.

This antenna with added RHCP Kit is part of our Super LEO Pack for Satellites LEO Antenna Set.

Antennas Amplifiers (AA) equipment is available in backorder only, and will be shipped within 10 to 15 days after the order.

More details

Data sheet

70cm Wideband CROSS Antenna 70cmCROSS46W for EME, DX-ing, Contesting, FM work, and part of Super LEO 430-440MHz :

70cm Wideband CROSS Antenna 70cm46CROSS Super LEO

What does 70cmCROSS46W mean?

70cm – 70cm band 430-440MHz
46 – 46 elements, 23 elements of horizontal polarization, and 23 elements of vertical polarization
CROSS – CROSS Yagi antenna has horizontal and vertical elements – separated on a single boom, the antenna is mounted in a “+” format.

This 70cm CROSS Antenna 70cmCROSS46W is used as part of the Super LEO Pack for Satellites LEO Antenna Set with added RHCP Kit.

LEO satellites – Low Earth orbit satellites in Ham Radio.

LEO satellites have a circular (or elliptical) orbit at the height of 250–2000 km from the Earth’s surface. The maximum time during which a satellite is above the local horizon for an observer on the Earth is up to 20 min. This time is used to transfer data, images, and photographs to selected ground stations positioned in strategic locations.

A number of Low Earth Orbit (LEO) OSCAR satellites use frequency modulation (FM). These are also commonly referred to as “FM LEOs” or the “FM Birds”. Such satellites act as FM amateur radio repeaters that can be communicated by using commonly available amateur radio equipment.

Electrical Specifications:

Frequency Range: 430 – 440 MHz
Free Space Forward Gain: 18.1 dBi
Front-to-Back Ratio: 30 dB
-3 dB Horizontal Beamwidth: 25.1°
-3 dB Vertical Beamwidth: 26°
Polarization: Horizontal and Vertical. RHCP and LHCP with phase shift
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
Matching Method: Direct feed through common mode choke (current balun)
Connectors: 2 x “N”

What about Orthogonality and related to that isolation between antennas (coupling) say SM5BSZ

“The NEC simulations above show that an isolation of 20 dB is sufficient. This means that the obvious way of checking a cross Yagi is to connect one of the feed lines to a transmitter with known output, and a power meter and a dummy load to the other. The attenuation is then measured directly through the power arriving at the dummy load. If it is below -20 dB compared to the transmitted power everything is fine. ”

Excellent results of isolation achieved -28 dB. Much better than SM5BSZ suggested:

Super LEO Azimuth Radiation Pattern

70cm Wideband CROSS Antenna 70cm46CROSS Azimuth Radiation Pattern

Mechanical Specifications:

Number of Elements: 46 (23 + 23)
Element Diameter: 4 mm Aluminum rod
Dipole Diameter: 8 mm Hard Copper tube plastic coated
Longest Element: 340 mm
Element Mounting Position: CROSS antenna – 2 Sides
Balun and Connectors: Included
Boom Length: 5.47 m
Single Antenna Length: 5.1 m
Boom Size: Tapered Boom 40×40 mm, 30×30 mm, 20×20 mm
Turning Radius: 3 m
Number of Boom Pieces: 5
Guy rope support: No, strong boom
Mounting Mast Diameter: 43 – 70 mm 1-11/16″ – 2-3/4″ OD
Clamp: Goliath
Survival Wind Speed: 150 km/h
Net Weight: 6 kg
Transportation Length: 119 cm

Everything is labeled, just put number to number. The antenna can be assembled with hand tools in a couple of minutes. Everything is included in the antenna box: Antenna, balun with connector, and bracket.

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