November 13, 2017

The Aurora Beacon

Last edited:

The "Aurora Beacon" transmits on 3.579 and 10.144 MHz with the callsign DK0WCY and on 5.195 MHz with the callsign DRA5. The beacon is located at the QTH of Emil Johannsen DK4LI in northern Germany in grid locator JO44vq. In its CW identifier loop beside its callsign the beacon continuously also sends a data group of four elements consisting of numbers and letters containing the current K index and MUF and indicating if there are unusual propagation conditions in progress or forecasted, like for instance Radio Aurora. At specific times every hour there are also more detailed broadcasts with geophysical and solar-terrestrial data, warnings, and forecasts, in CW, PSK31, and RTTY.

A schedule and information on the format of the broadcasts can be found on the beacon's website. On the website you can also read the history of this fascinating beacon, and how in pre-internet times it was set up mainly to alert the radio amateur community of Aurora conditions being in progress, the only other way of being alerted at the time being part of a telephone network of interested radio amateurs.

The Aurora Beacon somewhere around 2003 with Emil DK4LI.

Blank DRA5 QSL card as found on
The Aurora Beacon is a project of the DARC Ortsverband Süderbrarup M15 and the beacon manager is Ulrich Mueller DK4VW. I haven't been able to find out who founded the Aurora Beacon, and in what year, but looking at the photo above of around 2003 with the "20 Jahre DK0WCY" sign, I guess it must have been at least somewhere in the early 1980s.

Below you can listen to a recording I made of the DRA5 beacon on 5.195 MHz today with a CW datagram. The complete datagram reads as follows:

VVV DE DRA5 2/13/N/N
VVV DE DRA5 2/13/N/N

CONDS 13 NOV 1534 UT =
MAG   KIEL K  2 2   KCUR  2.3 2.3 =
IONO   RUEGEN FOF2  4.2 4.2   MUF  13 13   MAXHOP  2263 2263   MUF 1K  7 7 =
SUN   WIND  374 374   DENSITY  5 5   BZ  0 0   XRAY  A7 A7   FLARE  NONE
= =
= =
R  0 0   SSNE  NA NA   FLUX  69 69   BOULDER A  6 6   KIEL A  9 9

VVV DE DRA5 2/12/N/N
VVV DE DRA5 2/12/N/N

If the third element in the CW identifier data group is an A instead of an N, Auroral propagation conditions are in progress. Below, beside links related to the Aurora Beacon, also some links to webpages about Radio Aurora. During Auroral conditions I've heard the eerie sounding CW and SSB signals on 2m, but I haven't managed to make a QSO yet, and it's still on my amateur radio bucket list. Keeping an eye on the DX cluster and regularly monitoring the Aurora Beacon will hopefully alert me in time to the next Aurora opening.

November 05, 2017

QSL card in the Spotlight: VO1/OZ1AA Thomas Andersen, Cycling the Globe

Last edited: 10.11.2017

In 2010, Dane Thomas Andersen left Copenhagen by bicycle for an epic journey, a cycle touring expedition around the world known as "Cycling the Globe". 6 years later Andersen was back in Denmark, he'd completed his adventurous journey around the world, and in 2200 days had covered a total of 58,201 km through 58 countries!

Thomas Andersen cycling in the Andes on the border of Argentina and Chile. In the background the Lanin vulcano (Photo from the Cycling the Globe Facebook page).
Thomas Andersen also happens to be an avid ham radio operator, holding callsign OZ1AA, and during the trip has been active on the ham bands from the shacks of fellow radio amateurs around the world, old friends as well as newly met along the way.

On  September 20th, 2015, Thomas had just (on September 18th, if I'm not mistaken) reached the easternmost point of North America at Cape Spear, Newfoundland, had been on the road for more than 1800 days, had covered 43,712 km, and was staying with fellow radio amateur Gus VO1MP at his home in St.John's, Newfoundland. St. John's is the easternmost city of North America and well known to radio aficionados for Signal Hill where in 1901 Guglielmo Marconi received the first transatlantic radio signal (the Morse Code transmission originating from his Poldhu Wireless Station in Cornwall, UK). And I was lucky that day to catch Thomas on the air operating from Gus VO1MP's QTH and to QSO him on 20m CW. It was one of my most memorable QSOs and it resulted in the wonderful QSL card shown in this blog post. The VO1 prefix was added ofcourse to denote the QTH in Newfoundland, Canada.

Thomas Andersen (middle) at Cape Spear. Gus VO1MP on the right (Photo from the Cycling the Globe Facebook page).
Cape Spear literally was the end of the road for Thomas on this part of the trip. Next destination would be Africa.

More information can be found on Thomas' page, or on, as well as Twitter and Facebook.

I learned that there's also an amateur radio station located inside Cabot Tower on Signal Hill with the callsign VO1AA, and I wonder if it could have also been this location where Thomas has been active from on 20m CW when I QSOed him (1).

Newfoundland is IOTA NA-027.

You can listen to a recording of my QSO with Thomas below.

Addendum 10.11.2017
(1) Thomas informed me by e-mail that the contact was indeed made from the QTH of Gus VO1MP, not from Cabot Tower.,_Newfoundland_and_Labrador,_St._John%27s

October 29, 2017

Canada C3 Expedition update

Last edited:

On June 5th I wrote a blog post about the Canada C3 Expedition. Yesterday in Victoria, British Columbia, the epic 150-day expedition came to an end. The expedition ship "Polar Prince" had sailed 23,000 km from Canada's east to west coast via the infamous Northwest Passage in the Arctic.
For the complete duration of the Canada C3 voyage the Polar Prince could be tracked by radio amateurs by monitoring for the ship's WSPR beacon with callsign CG3EXP. At PA7MDJ over the summer many CG3EXP listening sessions were done. During the first legs of the voyage, the 200 mW CG3EXP WSPR beacons on 40m could be received relatively easily, and most nights around midnight UTC I could count on the CG3EXP callsign to show up in the decode window of my WSPR program at least a couple of times.
As expected, whilst the Polar Prince got more northerly and westerly spots became more seldom. Spots already became scarce when the ship had reached the northern part of Newfoundland. From this point on during listening sessions if I could get one or two spots I was lucky.
Nevertheless I managed to receive the CG3EXP beacons from various locations in the Arctic. The northern and westernmost location of the Polar Prince I managed to receive a WSPR beacon from was Pond Inlet, Nunavut at approximately 73ºN 78ºW in grid locator FQ02xq. And I'm still amazed! Receiving a 200 mW signal on 40m from this far into the Canadian Arctic with just a simple wire antenna! The fact that the antenna of the CG3EXP beacon was located aboard a ship surrounded by salt water must have been of huge benefit.

The Polar Prince at Bylot Island in the Canadian Arctic (photo from the Canada C3 Facebook page)
Below you can find the Canada C3 WSPR logbook (click to enlarge) that I kept during the summer. It does not contain all received beacons as it was more or less a logbook for all the different ship locations I managed to hear the WSPR beacons from. It includes locations like the previously mentioned Pond Inlet and other locations in the Arctic, and also L'Anse aux Meadows, Newfoundland, famous for being an archeological site with the remains of a Viking settlement dating to around the year 1000. It's the only certain site of a Viking settlement in North America and is widely accepted as evidence for pre-Columbian trans-oceanic contact.

Canada C3 Expedition logbook. The original Excel logbook spreadsheet was provided by Radio Amateurs of Canada (RAC) to keep a log and to send in at the end of the expedition. Each received unique 6 character grid locator gives points for a Canada C3 Award certificate (more information on the CG3EXP page) . Unfortunately I didn't manage to obtain the required 150 points.
Electronic QSL card received for my reception of the CG3EXP WSPR beacon from Pond Inlet. Electronic QSL cards can be requested by e-mail (see CG3EXP page for more information)
Pond Inlet, Nunavut (source)
CG3EXP in Pond Inlet heard by PA7MDJ

October 01, 2017

QRP Labs U3B and an update on my U3S

Last edited:

This is Hans Summers G0UPL:

Photo taken by PA7MDJ at HAM RADIO 2017 in Friedrichshafen

Hans is the designer and developer of amateur radio kits like the already legendary standalone Ultimate3S (U3S) 200 mW WSPR transmitter. The kits are sold through his company QRP Labs. Previously I've already written some blog posts about the U3S, of which I've built one myself, and of which I'm an extremely happy user! I met Hans at the QRP Labs booth at HAM RADIO 2017 in Friedrichshafen, and had the pleasure to have a chat with him. We all have our ham radio heroes, Hans is definitely one of mine.

This is the QRP Labs U3S:

U3S as built by PA7MDJ

And this is a prototype of the new QRP Labs U3B:

Photo taken by PA7MDJ at HAM RADIO 2017 in Friedrichshafen

The U3B basically is a miniature version of the U3S and was designed by Hans mainly to be used as a HF WSPR tracker payload for High Altitude Balloons. The U3B currently is still in its test phase, and the past few months about 9 test flights have been done. Most of the test flights were launched by well known WSPR balloonist Dave VE3KCL from Canada. I managed to catch the WSPR signals of two of the balloon test flights, the U3B-2 and the U3B-8.
The miniature size and the almost weightless SMD components make this a very lightweight payload ideal for single "party balloon" WSPR flights. The power of the U3B will be in the range of 10-20 mW, and the current draw will be extremely little. During the test flights, the current draw was so little that the tiny solar powered WSPR tracker remained awake and transmitting well into darkness where most other solar powered WSPR trackers would have already gone to sleep with a depleted battery quickly after sunset. The U3B "slept" for only a couple of hours. Although the power of 10mW might look very little, with the wire antenna of a WSPR balloon hanging in free air at about 10 km height it's sufficient to be picked up by the worldwide network of WSPR monitoring stations.

Eventually the U3B will be taken in production and will be sold through QRP Labs. Contrary to most other QRP Labs products, the U3B will not be sold as kit but as an already finished product, as the SMD components will be impossible to work on for the average kit builder. In Friedrichshafen Hans told me he was aiming at having the U3B ready for production in about three months. I think however that the popularity of the new QRP Labs QCX 5W CW transceiver kit might have slowed things down on the U3B development side, although test flights are still being launched; the U3B-9 is over the Atlantic Ocean as we speak.

I'm really looking forward to the U3B being taken in production and to experimenting with the tiny WSPR transmitter myself. My goal eventually is to launch a WSPR balloon myself, but I still have a lot to learn, about solar cells, insulated casings, helium, balloon pressure, the ideal launching weather, wind conditions, trajectory predictions, and probably many more things still unforeseen at this moment. It will be an interesting, but relatively long-haul project. Stay tuned!

Meanwhile my 200 mW U3S is still going strong, and since it started sending WSPR beacons for the first time in February, its signals have been picked up all over the world. Some places I want to mention are Reunion, Australia, Brazil and Vladivostok on 20m, and South Africa on 40m, all with an EFHW wire antenna. Do a search on U3S for more of my blog posts on this wonderful little transmitter.

September 22, 2017

5T5OK Mauritania - How Third World power blackouts can benefit the Little Pistol DXer

Last edited:

Most of us in the "Western World" have gotten used to reliable electric power delivery every minute of the day. Not seldomly it's a different situation in many of the poor countries of the "Third World". It's not uncommon for DXpeditions to African countries for instance to be plagued by frequent power outages or power blackouts. It's recently that I've learned that such a blackout can benefit the Little Pistol DXer like me.

5T5OK DXpedition logo
On September 18th, I was trying to QSO the 5T5OK DXpedition in Mauritania in CW on 17m, but I just couldn't get through the pile-up. I was especially keen on making the contact as it would be an ATNO* for me. I'd been fighting the pile-up for quite some time already when, much to my dismay, suddenly the signal of 5T5OK disappeared.
"Power off" reported OK6DJ (one of the 5T5OK operators) on the DX Cluster. I decided to patiently wait on the same 17m band frequency, and then suddenly after about 15 minutes they were back: ".....5T5OK   BLACK OUT HI   QRZ 5T5OK UP"! I quickly started keying my call again, and this time I was the second station to be picked out! Contact made!
Apparently not everybody had managed to bring up the patience I did, and the pile-up must have had decimated considerably, giving me the chance to finally get through to the desert of Mauritania!

Smartphone screenshot of the DX Cluster notification
5T5OK is a Czech DXpedition oparating from Mauritania between September 15-29, 2017. Their QTH is Terjit Vacances Hotel and Grill located at the intersection of the great Mauritanian desert and the Atlantic Ocean near the capital Nouakchott. On the website of Terjit Vacances you can read how, before the road between Nouadhibou and Nouakchott was built, Terjit Vacances was traditionally the point where so called "overlanders" (people travelling in Africa in vehicles over land) would cross the sand dunes into Nouakchott. Before the construction of the road, overlanders used to drive the coastline during ocean low tide to traverse the long distance from Nouadhibou to Nouakchott. During high tide the overlanders had to stop their travels, as the ocean would temporarily eat up the "road".

Mauritania has a population of approximately 4.3 million, and it's estimated that about one-third is living in the capital. 90 percent of the country (the 11th in size in Africa) is within the Sahara.

In the log!
5T5OK uses 100 Watts only, as a power amplifier is not allowed.

Below some photos of the 5T5OK QTH and antennas. All photos from the Czech DXpediton (CDXP) Facebook page.

Below you can listen to the black out message and my contact with 5T5OK. Don't pay attention to the background noises, hi.

* Also read my blog entry ATNO explained

September 15, 2017

From Pole to Pole with the Poles

Last edited: 16.09.2017

Yesterday, I posted a blog entry about the Polish Antarctic Station Henryk Arctowski. But the Poles do not only have a research station in the Antarctic, but also in the Arctic, at Hornsund on the island of Spitsbergen in the Svalbard Archipelago, to be precise.

Polish Polar Station Hornsund (source)
Polish Polar Station Hornsund is located at 77º00'N 15º33'W, and especially during winter is extremely isolated. The station is manned year-round. It was established in 1957 as a winter base for the 3rd International Geophysical Year 1957/1958 (1). There's a permanent staff of about 10 persons. The station is frequently visited by polar bears.


Last April, on the 20m band I managed to make a PSK31 QSO with Kamil Palkowski SQ8KFH who at the time was operating from the Polish Polar Station on Spitsbergen with the callsign JW/SQ8KFH. I'm awaiting a QSL card confirmation via the QSL bureau, and I will post it on here as soon as I've received it.

Spitsbergen is IOTA EU-026.

Polar bear trying to get into the Polish Polar Station (source)

Addendum 16.09.2017
(1) Actually this was the first International Geophysical Year (IGY), but there had been two "International Polar Years" before, on which the IGY was largely modeled.,_Hornsund

September 14, 2017

Polish Antarctic Station Arctowski

Last edited:

Beautiful picture from the HF0ARC page.
In the evening of September 9th, 2017, I managed to make a JT65 QSO on 40m with HF0ARC. Amateur radio station HF0ARC is located at the Polish Antarctic Station Henryk Arctowski on King George Island, South Shetland Islands, Antarctica. It is operated by Sebastian Gleich SQ1SGB who is part of the current overwintering crew of the 41st Polish Antarctic Expedition (2016/2017) to Arctowski. Austral winter is coming to an end though, and at the end of October, Sebastian will be leaving the station and head back home for Poland. So I feel very lucky to have already managed to put HF0ARC in the log, as time will be running out soon.

I was running my Yaesu FT991 at 35 Watts and used my sloper HyEndFed 10/20/40 wire antenna. I was surprised when I managed to make the contact already on the first attempt! An eQSL for the contact followed the next day. This contact definitely is one of the most special and memorable moments of my ham radio career!

Location of King George Island in the South Shetland Islands (source)
HF0ARC replaces the old Arctowski callsign HF0POL. The old HF0POL call was associated with Arctowski Station up until March 2016, and had been in use at the station since the late 1970s. In 2015, the Polish licensing regulations changed, making it possible to have the HF0 prefix issued to any Polish ham operating from Poland as well. Previously, the HF0 prefix was assigned exclusively to Polish hams operating from the South Shetland Islands. HF0POL is now in use by ham SP9GMK for ham operations from Poland, and is not associated with Arctowski Station anymore.

Polish Antarctic Station Henryk Arctowski was established in February 1977. On the beaches near the station numerous whale bones can be found, remains from the time when the site was used by whalers to process whales killed nearby. Nearby the station are various colonies of three different types of penguins. The station is named for Henryk Arctowski (1871-1958) who as a meteorologist accompanied the 1897-1899 "Belgica" expedition, the first expedition to overwinter in Antarctica. According to Wikipedia, Arctowski proposed the original notion of a wind chill factor, arguing that wind could be as damaging to human flesh as cold in harsh climates.

The South Shetland Islands are IOTA AN-010.

Arctowski Station (source)
Penguins n front of Arctowski Station (source)
Whale bones at Arctowski. Photographer T. Janecki (source)
Winter at Arctowski. Photographer T. Janecki (source)
Arctowski Station. Photographer T. Janecki (source)
eQSL to PA7MDJ from HF0ARC

September 10, 2017

Schynige Platte

Last edited: 13.09.2017

View from Schynige Platte (photo by PA7MDJ)
This summer, I was up at the Schynige Platte in the Berner Oberland region of Switzerland. We took the mountain cog-railway up from Wilderswil to the nostalgic Schynige Platte alpine railway station at 1967 m a.s.l. The view from the Schynige Platte is breathtaking, with the famous majestic, 4 km high trio Eiger, Mönch and Jungfrau towering in the distance. But especially to the SOTA chaser / activator there's also another attraction drawing the attention; the Gumihorn. With 2099 m a.s.l., the Gumihorn is the highest peak of the Schynige Platte. It's also SOTA summit HB/BE-134. But the peak is difficult to climb and is only for the experienced mountaineer. In the past there have been some SOTA activations, but most were invalid, as it turned out afterwards that the activators might have operated close to the actual SOTA activation zone (a maximum of 25 m vertical from the actual summit), but not from within, the zone being not so easy to reach without some serious belayed climbing.

The Schynige Platte railway station (photo by PA7MDJ)
Some SOTA activations are just more epic than others. And one of the more epic ones definitely was the activation of the Gumihorn HB/BE-134 on September 8th, 2017 by Manuel HB9DQM, Matt HB9FVF, and Clemens HB9EWO. Unfortunately I was at work and had to miss the activation, but still I really felt the urge to do this blog entry about it.

The Gumihorn SOTA HB/BE-134 (source)
The three OM took up the challenge to ascend the extremely steep southeastern grass slope, and to climb the last 25 metres of vertical rock face to get to the actual summit of the Gumihorn. And with succes; signing HB9SOTA, they did a valid activation from the summit, and despite bad HF propagation conditions made a total of 56 QSO's (including 11 on VHF).

Matt HB9FVF leading the way to the Gumihorn summit (source)
There's one other activation remaining in the SOTA database, dating back to 2010, done from the peak's southern grass flank, but height measurements taken by the September 8 SOTA climbing party show this may well have been a couple of metres short to be within the SOTA activation zone. It seems the only way to do a valid activation of the Gumihorn is to climb the vertical rock face to the top.

The SOTA climbing party at the summit found a cairn with a summit book from 1970. The book only has a few entries per year, and only one in 2016, and one in 2017, again showing that the Gumihorn is not an easy climb and is rarely visited.

The summit book (source)
Congratulations to HB9DQM, HB9FVF, and HB9EWO for the excellent achievement, both in SOTA and mountaineering!

Succesful activation from the summit by HB9SOTA on September 8th, 2017
The full activation report can be found here on the SOTA Reflector.

Addendum 13.09.2017
A nice slide show / video of the September 8 activation, can be found here on YouTube

The last remaining activation of the Gumihorn, the one of 2010, recently has also been withdrawn from the SOTA database by the activator, as the new height measurements have shown that it most probably was done from outside the SOTA activation zone.

September 09, 2017

First WSPR report from Australia

Last edited:

Finally my 200 mW WSPR signals managed to reach Australia! VK2XN spotted me on the 20m band on August 30th at 1724 UTC.
I used my QRP Labs U3S transmitter and a sloper HyEndFed 10/20/40 wire antenna.

On September 4th, I again was spotted by VK2XN, for a total of 18 times. Best SNR was -21 dB.

VK2XN is located in Bullawa Creek at the edge of Mount Kaputar National Park. Distance to my QTH is 16309 km.

Mount Kaputar National Park (source)
Sawn Rocks, Mount Kaputar NP (source)

August 18, 2017

HAARP and Arecibo ionospheric HF heating research facilities

Last edited:

I've always been highly fascinated by the HAARP facility in Gakona, Alaska. I already was back in the 1990s, when the research station was still operated by the US military and I was still an SWL.
HAARP stands for High Frequency Active Auroral Research Program. At the facility ionospheric research is done. The most prominent instrument at HAARP is the so called "ionospheric heater", a high power HF radio transmitter and antenna array which is used to temporarily excite a limited area of the ionosphere. Wikipedia states that the HAARP facility is capable of transmitting with a power of up to 4 GW ERP.
In 2014, the US Air Force announced that, starting that same year, the HAARP facility would be completely shut down and dismantled. In 2015 however, the control of the facility and all its equipment was taken over by University of Alaska Fairbanks and continues to operate. In February 2017, the first UAF-led research campaign was done. The UAF is not new to HAARP, as they already participated in the program when it was still operated by the military.

Assistant Research Professor Chris Fallen KL3WX of the University of Alaska Fairbanks Geophysical Institute, nowadays is one of the researchers doing ionospheric experiments at the facility, and keeps us posted on the ones that might be of interest to radio amateurs and shortwave listeners. The last research campaign of interest done at the facilty was in February 2017, and the next one will be in September 2017. During the February campaign, the signals of HAARP were picked up by radio amateurs all over the world. For more information, follow @ctfallen on Twitter, or visit his blog at

The HAARP site from the beginning has always been subject to conspiracy theories. Read some more about it at

Another ionospheric HF heater recently was constructed at the famous Arecibo Radio Telescope in Puerto Rico. The heater at Arecibo has a nominal power of 600 kW, 100 to 200 MW ERP.
The first research campaign was done this summer, and the signals were received by radio amateurs worldwide, including at PA7MDJ in the Netherlands. A short video compilation of the Arecibo listening sessions done at PA7MDJ, including audio recordings of the signals received, can be found here:

Some more technical info about the Arecibo ionospheric heater can be found here.

Here are some more pictures of the HAARP facility:

HAARP QSL cards!