Bulgaria: DX Program May 6,2011

 

DX Program May 6,2011

 

On the program:

-         Earth's atmosphere and radio waves

-         Radio transmission forecast

-         Radio calendar

-         Broadcast tips

-         DX Mix News by Ivo Ivanov

 

     Radio broadcast is achieved through radio waves. These waves can be ground waves, which are transmitted perpendicularly to the antenna and are easily affected by the topography of an area. For long distance radio transmissions people count on the types of radio waves, which are back scattered by layers of the atmosphere. At the bottom of the atmosphere, up to 11 kilometers in height, is the troposphere, which affects mainly long and medium waves. In extraordinary cases it can have effect on the FM waves too. The next layer is the stratosphere, which includes the ozone layer and the so-called cirrus clouds, which enable reception of far-away FM stations in the mid-latitudes during spring and summer. Some scientists believe that ozone itself also affects transmission but there are no sufficient evidence for this. 50 kilometers above the Earth starts the ionosphere. The upper border of this sphere is not strictly defined but it reaches 350 kilometers. There is also the layer of the upper ionosphere, which does not affect radio transmission. The ionosphere between 50 and 350 kilometers above the surface of the Earth has a major effect on radio transmission.  It can be divided into 4 layers. Layer D is located from 50 to 95 kilometers. Because of the strong ionization of this layer of the atmosphere due to solar activity, it absorbs long waves and such transmissions can reachonly local listeners.  The medium and tropical ranges of the short waves also disappear during the day in the E-layer of the ionosphere, situated between 95 and 110 kilometers above the Earth. In rare occasions FM waves can be reflected by this layer. Short waves are reflected by the F1 and F2 layers  - 110-250 km and 250-450 kilometers, respectively. The F layers also can sometimes reflect FM transmission. Otherwise, FM waves just vanish into space. There are other things that affect transmission, such as some clouds situated 80 kilometers above the ground where the zone where most asteroids burn up is also situated. The aurora takes place between 100and 400 kilometers above the Earth, and also has effect on transmission. Debris left by spacecraft also interfere with radio waves, although not much attention has been paid to this fact.

Radio Transmission Forecast 

Good propagation conditions are expected for frequencies above 9 megahertz, despite the strong solar wind stream. The electron conditions of the ionosphere will be improving due to the meteor shower from the Halley's Comet.

Radio calendar

On May 3, 1953 radio Deutsche Welle started transmission. May 7th is celebrated in Russia as Day of the Radio. May 10 marks the beginning of the transmissions of SouthgermanRadio in 1924 and FEBA (Far East Broadcasting Association) in 1970 . May 11 is when the first radio transmission in the UK took place in 1922 and is also the birthday of Radio Tashkent in 1927

 

Broadcast tips

EQUATORIAL GUINEA & PHILIPPINES : on 15190 kHz at 19.00 hours on April 25 Radio Africa in English and Radio Pilipinas in Philipino and English  were heard. Radio Inconfidencia from Brazil is often received on this frequency.

LIBYA: Radio Great Jamahiriya was heard with a programme in Arabic on 8500 kHz at 16.15hours on April 23..

ASCENCION : Radio BBC  West African Service in English was heard at 07.50 on 11765 , 13830 and 15400 kHz via a transmitter located on Ascension Island.

MIDDLE EAST: Two radio stations identifying themselves as the Voice of Justice were heard on April 23rd . One came from от Iran at 04.00 h on 9605 kHz in English and another one from Nagorno-Karabakh in Caucasus in Azeri from 05.00 h on 9677.5 kHz.

KOREA Republic: KBS World Radio was heard at 16.30 hours on 9515 kHz on April 22 with a programme in English and a Korean language lessons.

FRANCE : Radio France International  in the period April 21 to April 26 was heard in English between 04.00 and 08.00 hours under new schedule: at 04.00 on 9805 and 11995kHz , at 5 on Saturday and Sunday on 15160 , at 6 hours every day on 11615 and 17800 ,and at 7 hours on 15615 kHz

 Compiled by: Rumen Pankov

 

 

DX MIX

All times in Universal Time Coordinated (UTC), all frequencies in kHz.

 

Russia: We start with the schedule of radio The Voice of Russia in DRM mode:

-for Eastern Asia on 15735 Komsomolsk 90 kW / 213 deg.

0100-0300 in Russian 0300-0500 in English

 

-for Southern Asia on 9445 Irkutsk 35 kW / 235 deg.

1200-1600 in English, Hindi, Urdu

 

-for Western Europe

on 9880 Kaliningrad 15 kW / 220 deg.

1600-1700 in French 1700-1800 in Italian and 1800-2100 in French

on 9850 Kaliningrad 15 kW / 220 deg.

0800-1000 in Russian, 1000-1200 in German and 1200-1300 in Russian

on 9750 Moscow 35 kW / 265 deg.

1300-1400 in Russian, 1400-1500 in English and 1500-1800 in German

 

-for Northwestern Europe on 7225 Armavir 35 kW / 327 deg.

1400-1600 in English

 

-for Southeastern Europe on 6155 Kaliningrad 15 kW / 205 deg.

1500-1700 in Serbian and 1700-1800 in Italian

 

Here is the summer schedule of Radio Russia for Western Europe

0400-0800 on 12070, 0825-1300 on 13665, 1325-1700 on 9480 and 1725-2100 on 7215, all via a transmitter in Moscow 250 kW / 265 deg.

 

Here is the summer schedule of radio Tatarstan Wave in Tatar and Russian:

0410-0500 on 5110 Samara 250 kW / 60 deg. for the Far East

0610-0700 on 9690 Samara 250 kW / 60 deg. for Central Asia

0810-0900 on 15195 Samara 250 kW / 295 deg. for Russia and Eastern Europe

 

Germany: Here are the changes made through Media Broadcast MBR:

Hamada Radio International for Western Africa:

0530-0600 new 9610 Wertachtal 100 kW / 180 deg., replacing 9545 and parallel 11970

Voice of Ethiopian Unity in Amharic for Eastern Africa:

1700-1800 on Sunday and Wednesday. New frequency 13800 Issoudun 500 kW / 126 deg..Changed frequency is 11830

Radio Dardasha 7 in Arabic

1900-1930 new frequency 13740 Wertachtal 125 kW / 180 deg. for Western Africa.Changed frequency is 13640 due to strong interference from All India Radio, also in Arabic.

 

We continue with frequency changes made by Deutsche Welle:

0800-0900 in German for Australia new frequency 17860 Trincomalee 250 kW / 120 deg.,replacing 15650

1600-1700 in Amharic for Eastern Africa new frequencies 11835 Kigali 250 kW / 0 deg. and 17780 Sines 250 kW / 110 deg., replacing 11630 and 21840

2300-2400 in Chinese for China new frequencies 9865 Kranji 100 kW / 13 deg. and 11965Trincomalee 250 kW / 045 deg., replacing 11655 and 9865

Moldova: here are two station operating from 1530-1600 on 15540 Grigoriopol 300 kW / 160 deg.  for Eastern Africa

Radio Xoriyo Ogadenia on Monday and Friday in Somali and

Radio Hurriyal/SudaneseYouth Radio on Tuesday, Thursday and Saturday in Arabic

Myanmar: here is the schedule of the Democratic Voice of Burma radio in Burmese

1430-1530 new frequency 6225 Yerevan 300 kW / 100 deg., replacing 11515

2330-0030 new frequency 11595 Yerevan 300 kW / 100 deg., replacing 9490 Wertachtal

Libya: Currently LJBC Voice of Africa operates according to the following schedule: 

1200-1400 in Swahili, 1400-1600 in English and 1600-1800 in French on 17725 Sabratha500 kW / 180 deg. for Central and Eastern Africa

1800-2000 in Hausa on 11805 Sabratha 500 kW/230 deg. for Northwestern Africa with interference from Svoboda Radio in Russian. Changed frequency is 11800

USA: At the end here are the frequency changes made by the Voice of America in Arabic:1800-1830 Hello Darfur programme new frequency 11665 Sao Tome 100 kW / 052 deg.. Changed frequency is 11670, due to interference from All India Radio in English.

Compiled by: Ivo Ivanov, Frequency Manager of Radio Bulgaria

English: Alexander Markov

SOURCE:http://bnr.bg/sites/en/Lifestyle/DX/Pages/DXProgramMay6,2011.aspx

Via Yimber Gaviria, Colombia