DD5LP/P – October 28th. 2017 – DL/AM-001 Peissenberg (antenna comparison action).


Following the previous weeks participation in the VK-EU S2S event where I made no contacts into VK/ZL at all, I wanted to compare my J-Pole vertical antenna that I was planning to use for the EU-NA S2S event in a few weeks time against my standard linked dipole antenna. So as to have band conditions not affect the test too much, it was important to do these tests quickly and from the same summit.

The predicted weather forecast for the summit said that up to lunch time the weather would be cold but no rain or high winds, with the start of Hurricane Herbert arriving around noon (local time). The bigger problem might be the CQWW SSB contest which was on at the same time and as you’ll see from my report, this indeed turn out to be an issue.

Rather than put up two masts (I packed a second just in case), I decided to run the J-Pole in a sloper configuration from the top of the same mast that would hold up the Inverted-V dipole. During the week before the activation, I tested out this configuration in my garden and found no issues shown on my antenna analyser either by having the J-pole in a sloper configuration rather than helically wound around the mast and there appeared to be no interaction between the two antennas. In fact I hoped that perhaps the dipole might act as a sort of reflector for the J-Pole. To be sure I didn’t have any “live” cables on the unused antenna, I packed a BNC 50 ohm dummy load which would be connected to the end of the antenna cable that was not in use.

The Location:

Same location as the previous weekend – that meant the seating banks alongside the church on the top of Peissenberg. I wonder if the fact that the Church is roughly in the direction needed for long path to Australia would affect the J-Pole – it certainly doesn’t affect the dipole as I have worked VK & ZL from here before using that antenna.

The Activation:

The drive down was in mist or low cloud all the way and it certainly was COLD on arrival and during the complete activation!

My first contact was with John, ZL1BYZ in New Zealand but after that there were no more VK/ZL contacts – most likely due to all the QRM from the CQWW contest stations. There was literally NO room left on the whole of the 20 metre band. Why these animals can’t be caged into just 3/4 of the band (or less as is done in the WAG contest) I don’t understand. I do realise the CQWW is the biggest contest of the year however smaller contests have the same lack of respect for other users. Even emergency frequencies were being used by contest stations, not to mention frequencies reserved for QRP and digital stations. Being in breach of the IARU band plan should get a station excluded from the contest and with SDR radios with recording capabilities it’s VERY EASY to prove the offense.

One UAE based (but not listed in qrz.com so perhaps a pirate) amateur took some kind of pleasure of calling CQ on my frequency (I had checked it was clear before starting and have been there a while) just as I ended my CQ calls, so blocking anyone calling me. He must have been able to hear me or the timing would not have been so exact.

With long skip within Europe however I was able to manage 5-9+ signals both ways between myself and stations in Sweden, Finland, Northern Ireland and Greece, despite DQRM from contest stations!! Some of these SOTA chaser stations helped me test my two antennas which is why I went out – the J-pole vertical is 3 to 4 S points down on the simple linked Dipole. I now need to investigate why that is. It could be that the location was not conducive to good operation of the vertical antenna (church building too close and hence in the way) or the antenna doesn’t work well as a sloper and would be better back as a helical vertical. For the time being, the linked dipole will remain the “safe option” for activations and probably the antenna I will take out for the EU-NA S2S event in November.
I rounded out this activation with two S2S contacts on 40 metres, which was a nice bonus.


This slideshow requires JavaScript.


Yaesu FT817ND.

SOTABeams Bandhopper linked dipole plus home made loaded J-Pole for 20m.

Lambdahalbe 6m fibreglass mast.

Modified QAMP amplifier (30-35W on 40m, 20-25W on 20m).



I HATE UNRULY UNTHINKING CONTEST OPERATORS – Those animals need putting back in their cages! To be clear not all contest operators are idiots but it seems the CQWW brings out the worst of them. Seeing a positive side to the activity, I suppose it also proves that the Amateur radio hobby is NOT short of operators but where are these people when there’s no contest on and when did they last read their licence about using only as much power as needed to make the contact??

On the positive side, I DID complete my antenna comparison with several stations and getting a contact into New Zealand – especially as the first contact of the day may the trip worthwhile.

73 ’til the next Summit!