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A73A
Multi/Multi from the Desert of Qatar

Tobias Wellnitz, DH1TW   Friedrichshafen
     Tobias@dh1tw.de        June 2012
On my way to Qatar




                        FN
A73A CQ WW SSB 2011    2012   Slide 2
On the way to A73A campsite




                         FN
A73A CQ WW SSB 2011     2012    Slide 3
Arriving at the campsite




                              FN
A73A CQ WW SSB 2011          2012   Slide 4
A73A campsite




                       FN
A73A CQ WW SSB 2011   2012   Slide 5
So where is A73A campsite exactly?




                          FN
A73A CQ WW SSB 2011      2012   Slide 6
Satellite Image A73A campsite


                              360°
                      300°


                              A73A
                             Campsite


                                         FN
A73A CQ WW SSB 2011                     2012   Slide 7
Strategic Decissions

  Some Facts:
  • Temporary Activity
  • Directly on the beach (salt water)
  • Protected Lagoon
  • No high towers available
  • 85% QSOs come from direction 300-360º


                      Vertical Antennas
                                FN
A73A CQ WW SSB 2011            2012   Slide 8
N6BT Bravo Verticals
  •   2 el vertical parsitic array
  •   Elevated radials
  •   Switchable Reflector/Director
  •   3 Directions




                                  FN
A73A CQ WW SSB 2011              2012   Slide 9
A73A Vertical Antenna farm




                          FN
A73A CQ WW SSB 2011      2012   Slide 10
2el parasitic vertical array




                              FN
A73A CQ WW SSB 2011          2012   Slide 11
2el parasitic vertical array (Refelector)




                              FN
A73A CQ WW SSB 2011          2012   Slide 12
2el parasitic vertical array (Director)




                              FN
A73A CQ WW SSB 2011          2012   Slide 13
2x 2el vertical phased array




                            FN
A73A CQ WW SSB 2011        2012   Slide 14
2x 2el vertical phased array (BIP – 0º)




                             FN
A73A CQ WW SSB 2011         2012   Slide 15
2x 2el vertical phased array (BOP – 180º)




                            FN
A73A CQ WW SSB 2011        2012   Slide 16
2el vs phased 2x2el vertical array (BIP)




                             FN
A73A CQ WW SSB 2011         2012   Slide 17
A73A Antenna setup

  10m: 2x 2el N6BT verticals + A4S@15m
  15m: 2x 2el N6BT verticals
  20m: 2x 2el N6BT verticals
  40m: 2x 2el N6BT verticals
  80m: 4-Square
  160m: 20m high L-Antenna




                               FN
A73A CQ WW SSB 2011           2012   Slide 18
A73A antenna farm




                       FN
A73A CQ WW SSB 2011   2012   Slide 19
A73A Antenna farm (A4S)




                         FN
A73A CQ WW SSB 2011     2012   Slide 20
A73A Antenna farm 80m 4-Square




                         FN
A73A CQ WW SSB 2011     2012   Slide 21
A73A Antenna farm 160m L-Antenna




                         FN
A73A CQ WW SSB 2011     2012   Slide 22
Stackmatch II Plus (for BIP & BOP)




                            FN
A73A CQ WW SSB 2011        2012   Slide 23
Be aware about low & high tide




                           FN
A73A CQ WW SSB 2011       2012   Slide 24
Infrastructure is crucial




                               FN
A73A CQ WW SSB 2011           2012   Slide 25
And food as well 




                        FN
A73A CQ WW SSB 2011    2012   Slide 26
10m & 15m Shack




                       FN
A73A CQ WW SSB 2011   2012   Slide 27
20m, 40m, 80m, 160m Shack




                         FN
A73A CQ WW SSB 2011     2012   Slide 28
20m, 40m, 80m, 160m Shack




                         FN
A73A CQ WW SSB 2011     2012   Slide 29
Equipment & Results

  • 5x FT2000 + 1x IC746 Pro III
  • 4x ACOM2000A, OM3500, Emtron DX2
   Band               QSOs    Zones    Countries
   160m               340     13       62
   80m                1134    27       92
   40m                1081    27       101
   20m                2280    40       145
   15m                2815    40       147
   10m                3978    40       161
   Total:             11628   187      708

   Total score: 29,3 Mio
                                       FN
A73A CQ WW SSB 2011                   2012         Slide 30
Result analysis

                             Claimed Position

                             #1 Asia
                             #4 Outside US




                       FN
A73A CQ WW SSB 2011   2012      Slide 31
Thanks for all the QSOs!




                              FN
A73A CQ WW SSB 2011          2012   Slide 32
Follow me!

                             Twitter:
                             DH1TW
                             Website:
                             www.dh1tw.de

                             Pictures © by:
                             - A71BX
                             - HZ1DG
                             - K5GN
                       FN
A73A CQ WW SSB 2011   2012     Slide 33
FN
A73A CQ WW SSB 2011   2012   Slide 34

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A73A CQWW 2012 Contest operation from the Desert of Qatar

  • 1. A73A Multi/Multi from the Desert of Qatar Tobias Wellnitz, DH1TW Friedrichshafen Tobias@dh1tw.de June 2012
  • 2. On my way to Qatar FN A73A CQ WW SSB 2011 2012 Slide 2
  • 3. On the way to A73A campsite FN A73A CQ WW SSB 2011 2012 Slide 3
  • 4. Arriving at the campsite FN A73A CQ WW SSB 2011 2012 Slide 4
  • 5. A73A campsite FN A73A CQ WW SSB 2011 2012 Slide 5
  • 6. So where is A73A campsite exactly? FN A73A CQ WW SSB 2011 2012 Slide 6
  • 7. Satellite Image A73A campsite 360° 300° A73A Campsite FN A73A CQ WW SSB 2011 2012 Slide 7
  • 8. Strategic Decissions Some Facts: • Temporary Activity • Directly on the beach (salt water) • Protected Lagoon • No high towers available • 85% QSOs come from direction 300-360º Vertical Antennas FN A73A CQ WW SSB 2011 2012 Slide 8
  • 9. N6BT Bravo Verticals • 2 el vertical parsitic array • Elevated radials • Switchable Reflector/Director • 3 Directions FN A73A CQ WW SSB 2011 2012 Slide 9
  • 10. A73A Vertical Antenna farm FN A73A CQ WW SSB 2011 2012 Slide 10
  • 11. 2el parasitic vertical array FN A73A CQ WW SSB 2011 2012 Slide 11
  • 12. 2el parasitic vertical array (Refelector) FN A73A CQ WW SSB 2011 2012 Slide 12
  • 13. 2el parasitic vertical array (Director) FN A73A CQ WW SSB 2011 2012 Slide 13
  • 14. 2x 2el vertical phased array FN A73A CQ WW SSB 2011 2012 Slide 14
  • 15. 2x 2el vertical phased array (BIP – 0º) FN A73A CQ WW SSB 2011 2012 Slide 15
  • 16. 2x 2el vertical phased array (BOP – 180º) FN A73A CQ WW SSB 2011 2012 Slide 16
  • 17. 2el vs phased 2x2el vertical array (BIP) FN A73A CQ WW SSB 2011 2012 Slide 17
  • 18. A73A Antenna setup 10m: 2x 2el N6BT verticals + A4S@15m 15m: 2x 2el N6BT verticals 20m: 2x 2el N6BT verticals 40m: 2x 2el N6BT verticals 80m: 4-Square 160m: 20m high L-Antenna FN A73A CQ WW SSB 2011 2012 Slide 18
  • 19. A73A antenna farm FN A73A CQ WW SSB 2011 2012 Slide 19
  • 20. A73A Antenna farm (A4S) FN A73A CQ WW SSB 2011 2012 Slide 20
  • 21. A73A Antenna farm 80m 4-Square FN A73A CQ WW SSB 2011 2012 Slide 21
  • 22. A73A Antenna farm 160m L-Antenna FN A73A CQ WW SSB 2011 2012 Slide 22
  • 23. Stackmatch II Plus (for BIP & BOP) FN A73A CQ WW SSB 2011 2012 Slide 23
  • 24. Be aware about low & high tide FN A73A CQ WW SSB 2011 2012 Slide 24
  • 25. Infrastructure is crucial FN A73A CQ WW SSB 2011 2012 Slide 25
  • 26. And food as well  FN A73A CQ WW SSB 2011 2012 Slide 26
  • 27. 10m & 15m Shack FN A73A CQ WW SSB 2011 2012 Slide 27
  • 28. 20m, 40m, 80m, 160m Shack FN A73A CQ WW SSB 2011 2012 Slide 28
  • 29. 20m, 40m, 80m, 160m Shack FN A73A CQ WW SSB 2011 2012 Slide 29
  • 30. Equipment & Results • 5x FT2000 + 1x IC746 Pro III • 4x ACOM2000A, OM3500, Emtron DX2 Band QSOs Zones Countries 160m 340 13 62 80m 1134 27 92 40m 1081 27 101 20m 2280 40 145 15m 2815 40 147 10m 3978 40 161 Total: 11628 187 708 Total score: 29,3 Mio FN A73A CQ WW SSB 2011 2012 Slide 30
  • 31. Result analysis Claimed Position #1 Asia #4 Outside US FN A73A CQ WW SSB 2011 2012 Slide 31
  • 32. Thanks for all the QSOs! FN A73A CQ WW SSB 2011 2012 Slide 32
  • 33. Follow me! Twitter: DH1TW Website: www.dh1tw.de Pictures © by: - A71BX - HZ1DG - K5GN FN A73A CQ WW SSB 2011 2012 Slide 33
  • 34. FN A73A CQ WW SSB 2011 2012 Slide 34