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DJ5MO Germany flag Germany

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DOK i43

I was first licensed in The Netherlands in 1996 at the age of 17 (class A), 6 months later I passed my CW exam, mandatory for Extra class at that time. Callsigns I owned are PE1RQT, PA3HHA, PA5RA and finally PA5R that I still have. In 2009 I moved to Germany and now live in Niedersachsen, DOK i43. In 2012 I applied for my German callsign DJ5MO.

I've always been interested in DX hunting (for DXCC) and DXpeditioning. In the year 2001 I went on my first expedition to Luxembourg with 6 other radio friends. In the following 10 years we undertook several expeditions to LX, GU and OJ0, in total making well over 150,000 QSOs. In the picture at the top right you can see me on Market Reef in front of the lighthouse that was our shack, and a special place on the earth for DXCC.

Next to this, I was active in the contestgroup PA6Z, starting out as a small group of enthousiasts, and growing into being one of the major contest stations in the Multi Operator Multi Transmitter category in the Netherlands. Some pictures of our antennas and the station setup are below.

Antennas @ PA6Z, ARRL 10m Contest

In the front: 5el / 15m @ 21m AGL, in the back: 7el / 10m @ 18m AGL

In the front: Phased vertical for 80m, in the back: 7el / 10m, 5el / 15m, 4el / 20m and 2el 40m quad.

By the way, all antennas used at PA6Z are designed and build by ourselves. Sadly, we were forced to give up our contest location in 2010, and never found a good alternative site for such a large station. So this story ended for us.

As an alternative, I set out to start contesting from my new home in Germany. The station is still under construction, and is being designed for Single Operator / 2 Radio contest operation. I always need technical and personal challenge, and for me that brings contesting with 2 radios (SO2R). This is an awesome way of increasing your rates while keeping you focussed, but it requires operating skill and a dedicated station setup that is not easy to achieve. The station setup currently consists of:

  • ICOM7700 + Kenwood TS950SDX
  • Microham u2r SO2R controller
  • Acom1000 amplifier (not used during contests)
  • 15 element log periodic dipole array @21m for 10 - 40m
  • Inverted L with automatic coupler for 10 - 160m
  • 2 element triband Yagi fixed east @12m for 10/15/20m
  • 2x20m dipole for 80m
  • 4O3A high power bandpass filters
  • WX0B Sixpack 2x6 antenna switch
  • N1MM+ logging SW

Below a block diagram of the current SO2R stations setup:

SO2R Stations Architecture











Both radios are connected through the bandpass filters to any of the available antennas via a remote 2x6 antenna switch. This allows the operator to select the optimum antenna for the running station on one band, while picking new ones on another band using the second radio on one of the other antennas. Works pretty well during the slow times, but is a challenge during busy runs. The bandfilters provide the ability to listen on one band while transmitting on another band, without interference. I've tried several options, the 4O3A filters are the best.

In the table below, my contest achievements so far are listed:

Contest Category Final Score Ranking DL Ranking EU
CQWPX SSB 2013 SA LP ALL 122.492 #15 #84
CQWPX CW 2013 SA LP ALL 484.380 #7 #57
WAG 2013 SO CW LP 425.440 #27 -
CQWW CW 2013 SO LP ALL 482.784 #10 #112
Russian DX 2014 SOAB-MIX-LP 664.912 #6 #30
CQWPX CW 2014 SA LP ALL 1.072.720 #5 #36
WAG 2014 SO CW LP 454.581 #8 -
Russian DX 2015 SOAB-CW-LP 1.367.028 #10 #41
CQWPX CW 2015 SA LP ALL 1.581.545 #6 #30
WAG 2015 SO CW LP 814.660 #7 -
CQWW CW 2015 SO LP ALL 789.976 #16 #66
Russian DX 2016 SOAB-CW-LP 1.860.812 #4 #25
WAG 2016 SO CW LP 801.042 #7 -
CQWPX CW 2017 SA LP ALL 915.200* #4* #43*

* = claimed

I have always preferred CW for contesting, but do work SSB as well. I hope to contact you in any contest, and I'm happy to QSL via buro, LOTW or direct.

Vy 73 Jelmer DJ5MO /PA5R







8362638 Last modified: 2017-10-01 15:06:01, 17866 bytes

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