August 2016: extreme VHF tropo (F, HRV, BIH, I) – part II

This is the continuation of the article: August 2016: extreme VHF tropo (F, HRV, BIH, I) – part I.

mapAugust 26, 2016 was definitely a remarkable day for the European long-range tropospheric propagation. Zagreb was logged in Finland by several DX-ers, up to 1691 km, however in Poland the best conditions occurred one day later, on August 27th.

But first, let’s go back in time to the year 2014 when I wrote an article titled Autumn Tropo 2014 (D, HRV, SVN…), especially to the last paragraph:

Italy was very close this time, as the tropo ducting would have to cross only the Adriatic Sea. Unfortunately, all interesting frequencies were overtaken by closer stations here in Płock. The closest Italian locations are blocked by the Alps, but maybe someday we could receive it in Poland across Croatia and Adriatic Sea instead…?

The described path, across Adriatic Sea, was just a wishful thinking and actually I have never expected it to occur. Well, guess what happened…

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August 2016: extreme VHF tropo (F, HRV, BIH, I) – part I

August 2016 started with a cold and rainy weather, which continued for more than half of the month. It had some advantages though, as the radio band was clear of tropo signals during peak of the Perseids. Thankfully, the end of August was much more exciting and brought a superior tropospheric ducting propagation conditions. It started with distant Germany, Denmark, Sweden, AustriaFrance and then, after three days, moved more into central Europe, to a completely unexpected set of countries: Slovenia, CroatiaBosnia and Herzegovina and… ITALY!

Long range tropospheric ducting was lasting this time for 6 days – starting from August 23 until Sunday, August 28. Because of a very high amount of notable DX receptions, this article describes only the first three days of this awesome tropo opening.

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June 2016: D/SUI/AUT tropo ducting

The weather in first days of summer brought a widespread high pressure system that has settled down over Eastern and Central Europe. Very good tropospheric conditions were forecasted between Germany, Switzerland, Czech Republic and partially Poland. 

In the evening on June 23, I quickly checked the signals before sleep. There was nothing interesting on the 87.5-108 MHz band… except one low modulated station on 107.3. I have already received hr4 from Germany on this frequency twice before, but with weak signal levels. I was quite busy, so I kept the 107.3 tuned for any upcoming identification. In a moment I saw a PI code: D704. Well, that was odd, because I thought that hr4 carries a different PI code. And I was right, shortly I heard an ID – SWR4 verkehr! So, this time I got Raichberg @ 898 km on this frequency.

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XDR-GTK v1.0

I am pleased to announce that the long-awaited 1.0 version of XDR-GTK has just been released. As usually, XDR-I2C upgrade to the latest version (2016-04-20) is also required.


The main window contains new interference detectors: CCI (co-channel) and ACI (adjacent channel) which make the antenna pointing easier for the best signal to interference and noise ratio.

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December 2015: elevated SUI ducting

The beginning of December brought an unexpected tropospheric propagation. The weather was influenced by high pressure and it was rainy. In the evening on December 2nd, 2015 I noticed some distant signals. When I checked my tuner remotely, FM4 from Salzburg was already at stereo + RDS level. In just a hour I also heard Wendelstein, Hornisgrinde, Bregenz, Grünten, Säntis and the furthest location – Rigi @ 1015km, which I logged for the first time.

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