Tuesday, December 29, 2009

Arctic Radio 1584

Arctic Radio was monitored during the tests and the official broadcasts at home with a IQ and an ALA100 antenna. Although the noise level is high and there were interference from the co-channel stations it was heard several times at night and in the afternoon of Dec. 28th. Fortunately on Dec 28th they were transmitting after 14 utc of their afternoon broadcast and the signal level starting (Arctic R. is the black line) to increase then as can been seen in the graph. The levels were recorded afterwards using SpecLab´s Plotter window and the data was transfered to Excel for the graph.
Below is also a small clip of the transmission with heavy noise containing a part of the programme before 15 utc (with Iran coming quite strong as well) and an announcement in Swedish later on. The picture shows a SpecrtaVue screen with resolution of about 0.1 Hz.
Keep up the good work in b´casting all the staff of Arctic Radio Morokulien.

I wish also my best wishes to Arctic Radio Club now 50 years old

Monday, December 28, 2009


I have had some time after all to check a bit what is happening in the field of new software and receivers in the fascinating world of SDR-technology.

Finally tested a bit the latest release of Perseus software 2.1h. I was of course waiting for something from the big wish list which is easy to do but the implementation of the list is in the hand of the software designers. It is like waiting for presents from Santa Claus, you do not always get all you are dreaming of.

Well, the most important new features for me has been so far:

Multiple receivers attached to a single PC.

- for me not a big issue as I have currently not enaugh powerfull PC to run two Perseus at the same time. This feature is really good during DX-peditions. I wonder how many Perseus you can put into a same PC- they say you should not go more tahan totally 2000 kHz sample rate alltogether on one machine.

Waterfall Time Ticks

- this could be a usefull addition when checking what is happening on a certain SPAN especially hunting some carriers. However it seems SpecLab can do this more accurately and with many nice options.

Markers Log (file)

– this feature seems interesting, but of course not for a "normal" dx hunter, but for a more "scientivical" approarch what is happening on a certain SPAN. For instance when you try to find out certain fade in times of weak stations. However, the format is not a table if you log several markers (like a carrier and a noise marker) so you have to make some tricks with softwares (like Excel) to make graphs. Maybe someone could make a simple 3rd party software to do the graphs. As it seems the marker is locked into the peak of carrier, the lock can be loosed when the signal fades out ? And if you want to log markers before the fade in it seems hard as the marker is not locked to the exact frequency as far as I can understand. So making frequency locked logs of relative signal strengths one should use SpecLab instead. With SpecLab Plotterwindow you can trace the data of many carriers not only the signal level but the frequency drift as well.
The picture shows an example of a typical frequency with known offsets (Korea 1566.003 and Hubei China 1566.030).

Fully featured demonstration version

This version is nice to those who want to just test the software using some example files or files from friends. So now you do not need to have a Perseus RX plugged at least once to your hardware. This seems to be as a marketing tool for the Perseus. Money Talks.

WinUSB drivers and control DLL. Windows Vista and Windows 7 support.

Now the support of Vista 64bit and Win7 with own drivers, which is good. For me not a reality until I have to go for a new operating systems. I am still having a good worksing enviroment with an old XP. What I would like to see is a working system with Apple Macintosh OS or Linux environment!

Not all that good..

But what was a disappointment for me was that you still has to listen on AM or SAM when trying to read the exact carrier frequency! As you can see in an example here (AM-window behind the LSBdemod window) – a TA channel 1510 kHz, which also has very usual (and good indicators) of US stations: Boston, Denver and Seattle on 1510.018, 1510.000 and 1509.987 resp. (+- 1 Hz). If you look at the Perseus using lower sideband to avoid Euro QRM 1510 you are lost !

The same situation using the latest SpectraVue (now 3.03 with RBW 0.1Hz) – software shows using the LSB the carriers well and also automatically gives you the frequency reading on the upper left corner of the window. Maybe Perseus software could have one more button "show the center frequency of SPAN" which is independent of demodulation.

However, all in all the software runs OK and there are many good additions, it seems also there will be in a near future a version of Perseus software with easy connection over the internet. Let´s see. And last but not least: Perseus is the best receiver I have ever had. period.

Tuesday, December 22, 2009


When visiting my cottage I found a mystery around December 23rd at the cottage - now with a lot of snow around everything - also covering my antennas. Fortunately I had my video camcorder with me - a short video shows what is happening in the darkness of King´s Village...

So it is time to wish you all the best for the Holiday Season 2009!
73 TK

Monday, December 21, 2009

The Sun is Standing !


In the meantime when we also are in the middle of snow and ice in Europe we can enjoy the best medium wave conditions towards the Northern Dimensions!

The photo shows the scene at Abborsfors 10 kms South of the Kungsboele QTH, three days before the solstice, the weather was still fine with sun and - 19 centigrades (18 Dec 10 UTC).

More about latest DX soon.

73 TK

Friday, December 4, 2009

Ecos de Naranjito - revisited

After a nice email and also a postcard from the station (Licdo. Leoncio Delgado Hermida Gerente Propietario) I also got a link (Thank you Henrik Klemetz!) to Valter Comuzzi, Italy, who kindly send us some photos (originally from 2004 - grazie Valter!) of the station. The photo here shows the front door of the station.
Hopefully Ecos de Naranjito´s project of the new transmitter is going well and we wish the situation with electric power is better also soon.

Muchas gracias y saludos cordiales a Licdo. Leoncio Delgado Hermida!