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CG3EXP Canada flag Canada

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QSL: eQSL to CG3EXP or direct email via cg3exp@gmail.com

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Page managed by VE3EFF Lookups: 2086

 

The photo of the Polar Prince (above right)  was taken by John Brebner,  john.brebner@pollymoth.com

Hans Summers at QRP-Labs has graciously provided  the U3S multi band kit for the Canada C3 project. 

 

Canada C3 QSL Card By Robert Mazur VA3ROM.

Note: QSL cards are exclusive of the above award and may be granted on reception confirmation of the C3 signal on each of the 20m, 30m, and 40m bands.

via cg3exp@gmail.com or CG3EXP eQSL

Shown below are  actual ve3eff  QSL cards for each of the bands the C3 is transmitting on.

The QRP-Labs U3S sends 12 minutes of WSPR,  a quantity of six,  two minute transmissions, which make up a  pair of WSPR transmissions on each band 40m, 30m and 20m. This scheme provides the 6 digit grid for finer resolution location and tracking of the C3 ship.

 

 

End Fed Antenna Top Mast connection at 46 FT 

Bottom of 46 FT end fed antenna.

QRP-Labs WSPR 20m/30m/40m beacon location in the Polar Prince equipment room.

Luc Pernot VE3JGL securing the 46 FT end fed antenna to the ship's mast.

 

C3 Antenna Analysis by David Conn VE3KL

 

C3 Endfed Antenna Radiation patterns

Antenna length = 14 m mounted at an angle of 62 degrees from the horizontal.

Located on the port side of the Polar Prince across the beam of the ship

 

 

I have analyzed the radiation pattern of the 46 foot (14m) end fed antenna used on the C3 2017 expedition using 4nec2 antenna simulator. This analysis is simple in that it does not include the large metal structures on the ship. Hence the results are only approximate but since the antenna is resonant, the results should be useful.

 

The asumptions used are:

 

  • The antenna  length is 46 feet (14 metres) and is mounted at an angle of 62 degrees from the horizontal and broadside to the ship.
  • The antenna is mounted over  sea water which has a high conductivity.

 

Summary:

 

The antenna exhibits an omnidirectional pattern at 14, 10 and 7 MHz with a couple of vertical lobes.  Because of the antenna will be used over sea water the gain is quite high; around 5 dBi at 14 MHz depending on the elevation angle. Since the radiation pattern is omnidirectional, the performance should not vary as the ship changes direction.  It will be interesting to see how the actual performance changes as the ship goes through all compas angles during the expedition.

 

The results of my analysis are given in Figures 1,2,3.

 

 

 

 

8223744 Last modified: 2017-07-18 14:08:59, 28135 bytes

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