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5P5T Danish VHF contest group

Region 1 144 MHz September contest from JO64gx

Interested in visiting/operating from 5P5T in the 2016 September contest?

Contact OZ1FDH claus.felby (at) gmail.com



5P5T September contest 2015 – interesting weather and tough work

OZ1FDH, OZ1IKY, OZ1GER, AG6QV, PA5DD, OX5T (missing)

September is the month of late summer days, the smell of morning dew in the fields and the feeling of a summer almost gone. However, this was not exactly the experience for this years VHF contest. It was more like a collection of low-pressure ridges with high accompanying joyful winds and heavy rain. For the past 5 years we have been lucky with the weather during the VHF September contest, and just a week before the contest the weather forecast looked nice, but then it started to turn bad. At one point there was a storm warning, and if you are at the top of a hill right next to the ocean, that is not a very good combination. We had experienced the October contest 2008 with a full gale, and where considering canceling this years contest, but fortunately the weather forecast got slightly better and we decided to go all inn as usual.



As always we started preparations a little too late building, repairing and fixing equipment, but as the week before the contest arrived everything seemed to be in place and we could start loading the equipment. We try to keep the antenna setup and station as simple as possible, and every year we bring a little bit less equipment, but still it is quite a logistics operation to set up a full VHF station.

Figure 1. Loading the equipment.

For this years contest we had changed a few things; the 4x 6 el were replaced with 4x 3 el DK7ZB, the horse trailer operator room, and its smell of the other friendly users, is now of the past, and we have a nice big cargo trailer with plenty of room. Another addition was a new operator Kenneth OZ1IKY who joined us. Kenneth is a very serious HF contest operator and we persuaded him to try a major VHF contest, but could a HF operator really perform in a VHF contest?

We started Friday with the ritual dish of fried fish and potatoes at Klintholm harbor and made it to the top of Kongsbjerg with all the equipment in the first try – there is nothing like a good old Land Rover. Weather on Friday was all right and OZ1IKY, PA5DD and OZ1FDH started to assemble the antennas (24 individual yagis in total). OZ1GER arrived with the 2 tons generator and we continued putting it all together. In the evening we were 60% done and could sit down with a few bottles of red wine, just relax and enjoy the view. Friday evening is one of the highlights of the contest weekend, sitting at the southern tip of Moen, talking to old and new friends and looking at the light from the German cities more than 50 km away is just nice. Unfortunately the low pressure ridges where starting to arrive and wind was picking up so we had to make it for the cosy interior of the trailer. We all went to bad not too late, but winds where picking further up and some really heavy rains gave us all some unrestfull sleep.

Saturday morning arrived and everybody was a bit groggy after the nightly storm, as Kenneth put it “I better get some new rain gear”.Breakfast was buns a’la OZ1FDH, unfortunately we forgot the butter and milk, so we had to make with just buns and coffee, but we survived. AG6QV, Frank (OZ1GPI) arrived somewhat late Saturday, due to a marathon race; the police had sealed of a major part of the highway and Frank had to make quite a detour around the southern part of Denmark.



Saturday around noon all was fine, everything performed like a clockwork, only the 2nd operator receiver was missing. We had all 4 antenna systems up; 4x3 el at 90 deg, 8x3 el at 160 deg., 8x 3 el at 210 deg and 4x10 el on a rotor.  There was lots of time to relax and rest before the test started in the afternoon, but where we to be fooled ……

The PTT for the PA started to become a little “shaky”. Everything was reconnected and looked fine for a short while, but then things became really strange. The PTT worked on and off, or in the opposite mode. The sequencer for PA and antenna relays in the DB6NT transverter apparently was broken. But no, everything was OK in the transverter. Disconnecting and connecting cables, turning the 12V supply for the antenna relays on and off, all gave very confusing results.
Then, finally when double checking the cables we noticed something liquid was moving inside the connector box for the PTT and antenna relays cables stored below the trailer, in order too get the cables away form the operator room. The lid came off and low and behold, there was 2 cm of bluish water inside the box, and the bright blue color of copper in its Cu(III) oxidation state was all over the circuit board and solder joints. What had happened was that even tough we put the box well below the trailer; the high winds and heavy rains during the night had half way filled the box with water. Then as we turned on the power in the morning electrolysis kicked inn, and after a few hours it started to short circuit everything. Now this was all fine if it wasn’t because we were only 20 min away form the start of the contest, and the stress level and temper was way into the red level of the scale. OZ1FDH, Claus who build the station was somewhat stressed, and the rest of the crew knew that the best thing to do was to stay at least 10 m away. The main part of the blue copper look was removed, but relays and everything were still dripping water. The cables were connected and it seemed that it sort of worked again (figure 2). However, closing the connector box caused problems to return, so we opened the box and put a blower next to it in order to dry it, just like laundry.

Figure 2. OZ1FDH with a high pulse fixing the relays box 20 min before the contest


Contest start

30 seconds before kick off there was an operator with a red face and a high pulse rate (OZ1FDH) ready at the station and we could start. The first 15 min were really sluggish at our part, but the QSO rate started to pick up, however, we only made 59 QSO’s the first hour, it did not look promising at all. PA5DD, Uffe took over and boosted our bandwidth by simple will power. The QSO rate improved and stayed pretty high for this far north, we kept 60 qso’s/hour right until 20 GMT. No major DX, but we actually made quite a few QSO’s into JN59 and JN48 keeping the points coming. Then the effect of the new 6 hour class kicked in from one minute to the next and the QSO rate dropped with a big splash. Comparing the hourly QSO rate of 2015 to 2014, clearly shows the effect, see figure 3. The idea behind the 6 hour class was to increase activity, but whether or not it only concentrates the activity during the first 6 hours remains to be seen during the next years. The 6 hour effect may also have reduced the normal Sunday morning peak. However, we will have to see the trend for a few more years before anything can be concluded on the effect of the 6 hour class.

Figure 3. QSO’s vs time, compare 2015 (top) to 2014 (bottom)

Figure 4. OZ1IKY’s shoes drying on top of the power supply.

Figure 5. View from 8x3 el pointing 160 degrees

Figure 6. PA5DD and AG6QV operating Saturday evening

Figure 7. All antenna systems and the operating trailer



Conditions were definitely average, but distances were not that bad, we seemed to work more German stations at the 600-700 km range. Signals weren’t fantastic, but manageable.
Saturday evening the wind was quite strong and the trailer was sometimes rocking back and forth like a boat in the sea. Luckily enough we had put some extra wires on the antenna masts keeping them from blowing away. OZ1IKY just kept the QSO’s coming into the log, smoothly and faultless, - yes HF operators definitely know how to work VHF contests.      

Then just around midnight GMT tuning across the band there was YT4B with a steady 59 signal. A quick call gave a quick reply, and we finished the QSO in seconds, the ODX of 1305 km was in the log. He was clearly audible for more than 2 minutes, was it MS? Probably, but with very slow QSB and a steady signal.

The late hours and early morning brought some good DX just below or above 1000 km with UY5W (as always) and S59R, S59P, S59ABC together with TM0W during the dead zone in the night. We missed UR7D in the log this year.



OX5T (OZ5BD) joined us Sunday morning with breakfast and gave rest of the crew some time off from the radio. We were also visited by approximately 100 runners participating in a Danish “mountain race", some of them forgot running to in surprise of finding us on the top. The antenna relay for the 8x3 el got stuck in the TX position, but to take the system down would require that we also took the other systems down because the guy wires were in the way, so we decided to leave it and use the rotor mounted system as RX antenna. Sunday morning the activity picked up, but the level was quite low, and it was more a question if we would make 700 QSO’s than 800 QSO’s. We crossed the 700 mark in the last hour including HB9BA finishing off with 715 QSO’s and approximately 357000 points in 94 locators and 19 DXCCs.

The sun came out at the end of the contest and winds dropped. Making the disassembly and packing of equipment uneventful and without any problems, but boy do you feel tired….


In perspective

2015 was not a great contest, but all in all we were quite satisfied with the result. In many ways 2015 was a full radio sports event; rough weather, Murphy type equipment failures, hard work and good company. Next year 5P5T will be back and will then be QRV for the 10’th time in a row. Thanks for all the QSO’s and we do indeed look forward to next years contest.


Contest statisitics:

 Top 20 QSO-points                                  

  1 20150905 2348 YT4B           59   451 59   207        JN94SD     1305 155

  2 20150906 0039 TM0W           559  460 599  287        JN36BP     1030 208

  3 20150905 1948 UW5Y           51   337 59   196        KN18OO     1019 130

  4 20150906 0009 S59P           559  455 599  376        JN86AO      963 164

  5 20150906 0008 S59R           559  454 599  424        JN76OM      959 168

  6 20150906 0111 S59ABC         51   466 59   266        JN76TO      956 166

  7 20150906 0309 HG1Z           529  479 599  343        JN86KU      953 160

  8 20150905 2253 HA2R           539  435 59   276        JN87UE      938 155

  9 20150905 2030 HG6Z           53   368 59   075        JN97WV      937 144

 10 20150905 2036 HG7M           53   370 59   116        JN97WW      933 144

 11 20150905 2234 HB9RF          55   426 59   190        JN47FB      926 200

 12 20150906 1323 HB9BA          55   703 55   210        JN37SG      925 204

 13 20150906 0049 HB9CYF/P       559  461 599  175        JN37OJ      921 206

 14 20150906 0227 HG1W           539  474 599  381        JN87GF      906 160

 15 20150905 1929 HA1KYY         55   318 55   189        JN87FI      891 161

 16 20150905 1824 F1AZJ/P        59   256 59   136        JN28OK      885 218

 17 20150906 0222 HB9FAP         559  473 599  574        JN47PH      882 196

 18 20150905 2217 G3M            41   418 57   252        JO01NC      876 245

 19 20150906 0057 TM2W           59   463 59   470        JN37NV      872 208

 20 20150905 2345 OM3RM          53   450 59   476        JN87WV      870 153


Figure 8 QSO’s vs. QTF





5P5T Winner of the 2013 Region 1 VHF multioperator section

The full story about the contest can be found at www.5p5t.dk

From the DARC VHF UHF contest website:


About us
The 5P5T group consists at present of OZ1FDH, OZ1DJJ/OX3LX, OZ1GER, PA5DD/OZ1DOQ and OZ5BD/OX5T. We have participated in VHF contests for a number of years and back in the 80'es and 90'es the members were active with the callsigns OZ5UKW and OZ1DOQ/P. Then after more than a decade of doing other things (like raising kids and getting a job) we started again with our old passion for VHF contesting.

We are active on 144 MHz every year the first weekend of sepember from the island of Moen (JO64gx). The QTH is Kongsbjerg 134 m ASL at the southern part of the limestone cliff formation on Moen. Access to the site is through small and slippery trails in the forest, but it is a wonderful and scenic site.The take off from Kongsbjerg is almost perfect with a negative horison 360 deg. Another advantage is that the nearest QRO station (SK7MW) is more than 50 km away.


Contest site on Kongsbjerg in 2011. The operator room is in a horse trailer (we left the horse back home) and the PA's are in a separate trailer in order to keep the blower noise levels down


Take off to the south from Kongsbjerg

We started with the callsign 5P5T in the 2007 Region 1 VHF test and have been active every year since then. QSL responsible is OZ1FDH, we normally send out QSL for all contacts once a year in the fall. In 2011 we broke the old OZ5TE points record from 1981.The final results from DARC gave us a 2nd place in the multioperator section. 2013 was an even better year. For the first time since 1972 an OZ station has won the region 1 VHF contest! You can find more info by searching for 5P5T on the web or YOUTUBE.


Final results and trophy IARU VHF 2011

Antennas are everything for a good contest. During the years we have experimented with different setups. The main antenna systems are 8x3 el and 4x10 el vertically stacked. All the antennas we use are DK7ZB designs from NUXCOM. These antennas really made a difference for us. By their UFB performance and good value for money, they are truly contest winners. In 2013 we used 4 antenna systems on which we transmit and receive simoultaneoulsy, for receive each system can be used individually.

The station is an ICOM 7700 + a DB6NT transverter and for the 2nd operator RX we use an ICOM 756 Pro II. In general we use simplicity as the guiding principle for our station setup. The more simple the operator interface, the more the oprator can focus on the QSO's. The logging software has so far been Taclog developed by OZ2M. This software has the most simple and best user interface of all logging programs we have tested, unfortunately it is no longer compatible with the recent windows systems and we probably need to change to a more modern but also less user friendly logging software. Alternatively we may rewrite Taclog for windows, -stay tuned for more info on this.

An often forgotten part of the portable equipment is the mains supply. We are fortunate to have access to a 30 kw diesel generator, which delivers 240 V of pure sinus AC and keeps all the equipment in good health.

For decades it has been custom on the HF bands always to give a standard 59 report regardless what strength of the signal. Unfortunately this tendency has now also spread to VHF. Most contest programs simply has 59 as a standard report. But especially for VHF and UHF there is a lot of value in a correct signal report to help you accomplish a QSO. If you send out a 51 report you tell the other station that the signal is weak and they have to make an extra effort to get the contest exchange to you.
Often we have experienced that we actually receive e.g. a 55 report, but as the contest program put in 59 as a standard report, the QSO is not logged correctly. That is a silly way for everybody to waste points and QSO's. Therefore we highly reccomend that everybody stop using automatic 59 reports, instead use a correct signal report to improve the number of succesful QSO's for everybody. Likewize automatic 59 reports in contest log programs should automatically disqualify a logprogram for the serious contester.


5P5T Dream Team 2011

The 2011 Dream team from left to right PA5DD,OZ5BD,OZ1GER,OZ1FDH and OZ1DJJ


8x 3 elm DK7ZB 12.5 Ohm yagies, build from NUXCOM Kits Shack, horse trailer. (OZ1DJJ)

The 2011, 3 antenne systems for 144MHz system 1;8x3elm fixed at 160deg, system 2; 8x3elm fixed at 210 deg and system 3; 2x 18elm M2+rotor

Closer look at one of the 8x3elm -sorry for the small kink of one of the dipoles :)
The 2009 and 2010 antenne system Relay and preamp boxes
Diesel Generator PA trailer
Wildlife in JO64, OZ1FDH making new friends Wildlife OZ1FDH creates a pileup
4CX1500 repair in the open, nice there was no rain when working with 3KV Open contest dinner


Trophy for the 2nd place in the 2011 IARU VHF contest


Selfie of 5P5T team 2013; OZ1DJJ, OZ1FDH, PA5DD and OZ1GER


6719822 Last modified: 2015-09-18 14:57:37, 30679 bytes

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