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144 – 146 MHz CROSS 7+7 Elements Yagi Antenna. Excellent for EME MAP65 and Satellites. Used in “Big Leo Pack“
This CROSS antenna on about 3.5m boom is designed for a complete 2m band. Antenna covers 144 – 146 MHz.
Wide-band operation with low SWR. Could be used for any radio modes like CW, SSB, FM, JT65B etc.
All kind of communications like EME, DX-ing, Conesting, Repeater work, LEO satellite…
For satellite use in Big Leo Pack mount the antenna on fiberglass pipe 40mm with wall at least 8mm or full fiberglass rod 40 mm.
Electrical and mechanical specifications of PA144-CROSS-14-3.5AP
|Electrical Specifications PA144-CROSS-14-3.5AP|
|Frequency Range:||144 – 146 MHz|
|Free Space Forward Gain:||12.7 dBi|
|Front to Back Ratio:||32 dB|
|-3 dB Horizontal Beam width:||43.2°|
|-3 dB Vertical Beam width:||50.2°|
|Polarization||Horizontal and Vertical|
|Nominal Input Impedance:||50 Ohms|
|SWR Across Entire Band:||< 1.2|
|Maximum Power Input:||2 x 1500 W|
|Matching Method:||Direct feed through common mode choke (current balun)|
|Connectors:||2 x “N”|
2 meter CROSS Yagi Antenna with 7+7 elements PA144-CROSS-14-3.5AP for EME and part of Big Leo Kit-Pack Azimuth Radiation Pattern
2m CROSS Yagi Antenna 14 elements for MAP65 and Big Leo Kit – Pack PA144-CROSS-14-3.5AP Label View
|Mechanical Specifications PA144-CROSS-14-3.5AP|
|Number of Elements:||7 + 7 (14)
|Element Diameter:||8 mm Aluminum tube|
|Dipole Diameter:||8 mm Hard Copper tube plastic coated|
|Longest Element:||1040 mm|
|Element Mounting Position:||CROSS antenna – 2 Sides|
|Balun and Connectors:||Included|
|Boom Length:||3.5 m|
|Boom Size:||Tapered Boom 30×30, 20×20 mm|
|Turning Radius:||2 m|
|Number of Boom Pieces:||3|
|Guy rope support:||No, strong boom|
|Mounting Mast Diameter:||43 – 70 mm 1-11/16″ – 2-3/4″ OD|
|Survival Wind Speed:||150 km/h|
|Wind Load:||0.13 m2|
|Gross Weight:||6 kg|
|Transportation Length:||119 cm|
2 meter CROSS Yagi 14 elements PA144-CROSS-14-3.5AP-RHCP Big Leo Pack Measured Coupling Between Antennas (Orthogonality)
Excellent results achieved -30 dB. Much better than Leif SM5BSZ suggested:
“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. ”
2 meter CROSS Yagi 7+7 elements PA144-CROSS-14-3.5AP RHCP Big Leo Pack Elevation Radiation Pattern
All 2m CROSS antennas are here: 2m CROSS antennas
This antenna is used in Big LEO Pack
2m CROSS Antenna PA144-CROSS-14-3.5A at SM0TGU
This is the best antenna I have mounted so far when looking at material quality!
Initial test via RS-44 satellite is very good, more gain compared with my old 6 el Yagis. I also think the antenna has less noise.