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Stara Zagora Transmitter
The Stara Zagora Transmitter was a high power mediumwave broadcasting station near Stara Zagora in Bulgaria. It had at least 3 guyed masts. One of these masts was a Blaw-Knox Tower. It was one of the few Blaw-Knox towers in Europe, along with similar masts at Vakarel, Bulgaria, at Riga, Latvia, Lakihegy, Hungary and Lisnagarvey, Northern Ireland. The transmitter was shut down on April 7, 2013. The masts were dismantled and scrapped in November 2014. See also * List of tallest structures in Bulgaria An incomplete list of the tallest structures in Bulgaria. This list contains all types of structures. See also *List of tallest buildings in Sofia *List of tallest buildings in Bulgaria *List of tallest buildings in Europe *List of tallest bu ... External links Pictures and description in Bulgarian Towers in Bulgaria Buildings and structures in Stara Zagora {{bulgaria-struct-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediumwave
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime, reception is usually limited to more local stations, though this is dependent on the signal conditions and quality of radio receiver used. Improved signal propagation at night allows the reception of much longer distance signals (within a range of about 2,000 km or 1,200 miles). This can cause increased interference because on most channels multiple transmitters operate simultaneously worldwide. In addition, amplitude modulation (AM) is often more prone to interference by various electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy and longer antennas. Digital modes are possible but have not reached momentum yet. MW was the main radio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stara Zagora
Stara Zagora ( bg, Стара Загора, ) is the sixth-largest city in Bulgaria, and the administrative capital of the homonymous Stara Zagora Province. Name The name comes from the Slavic root ''star'' ("old") and the name of the medieval region of Zagore ("beyond the alkanmountains" in Slavic) The original name was Beroe, which was changed to Ulpia Augusta Traiana by the Romans. From the 6th century the city was called Vereja and, from 784, Irenopolis ( Greek: Ειρηνούπολις) in honour of the Byzantine empress Irene of Athens. In the Middle Ages it was called Boruj by the Bulgarians and later, Železnik. The Turks called it Eski Hisar (old fort) and Eski Zagra, from which its current name derives, assigned in 1871. History The original Thracian settlement dates from the 5-4th century BC when it was called Beroe or Beroia. The city was founded by Philip II of Macedon in 342 BC. Under the Roman Empire, the city was renamed ''Ulpia Augusta Traiana'' in h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulgaria
Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. Bulgaria covers a territory of , and is the sixteenth-largest country in Europe. Sofia is the nation's capital and largest city; other major cities are Plovdiv, Varna and Burgas. One of the earliest societies in the lands of modern-day Bulgaria was the Neolithic Karanovo culture, which dates back to 6,500 BC. In the 6th to 3rd century BC the region was a battleground for ancient Thracians, Persians, Celts and Macedonians; stability came when the Roman Empire conquered the region in AD 45. After the Roman state splintered, tribal invasions in the region resumed. Around the 6th century, these territories were settled by the early Slavs. The Bulgars, led ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blaw-Knox Tower
The Blaw-Knox company was an American manufacturer of steel structures and construction equipment based in Pittsburgh, Pennsylvania. The company is today best known for its radio towers, most of which were constructed during the 1930s in the United States. Although Blaw-Knox built many kinds of towers, the term Blaw-Knox tower (or radiator) usually refers to the company's unusual "diamond cantilever" design, which is stabilized by guy wires attached only at the vertical center of the mast, where its cross-section is widest. During the 1930s AM radio broadcasting stations adopted single mast radiator antennas, and the Blaw-Knox design was the first type used. A 1942 advertisement claims that 70% of all radio towers in the United States at the time were built by Blaw-Knox. The distinctive diamond-shaped towers became an icon of early radio. Several are listed on the United States National Register of Historic Places, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. Comprising the westernmost peninsulas of Eurasia, it shares the continental landmass of Afro-Eurasia with both Africa and Asia. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south and Asia to the east. Europe is commonly considered to be separated from Asia by the watershed of the Ural Mountains, the Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea and the waterways of the Turkish Straits. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vakarel Transmitter
The Vakarel Transmitter was a large broadcasting facility for long- and medium wave near Vakarel, Bulgaria. The Vakarel Transmitter was inaugurated in 1937. It had one directional antenna consisting of three guyed masts and another consisting of two masts. The most remarkable mast of the Vakarel Transmitter was the Blaw-Knox tower, built in 1937 by the company Telefunken. Along with Lakihegy Tower, Hungary, Riga LVRTC Transmitter, Latvia and Lisnagarvey Radio Mast, Northern Ireland it was one of the few Blaw-Knox towers in Europe until its demolition on 16 September 2020. The transmitter was shut down at 22:00 UTC on 31 December 2014. Transmitter internal structure The modulation method used by the transmitter in Vakarel is called a tube voltage modulation and was successfully used in all powerful AM transmitters at that time. The Vakarel transmitter is supplied with electricity from a substation in Samokov via a medium voltage transmission line. The transmitter uses six s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riga LVRTC Transmitter
The Riga LVRTC Transmitter was a mediumwave transmitter in Ulbroka near Riga, Latvia, which broadcast on 945 kHz a music program in Digital Radio Mondiale, DRM-simulcast mode, which was receivable at night time in wide parts of Europe. It used as an antenna two guyed mast radiators. One of them was a guyed lattice mast. The other smaller tower stays a Blaw-Knox Radiator. It is one of the few existing Blaw-Knox Radiators in Europe. Other towers of this type exist at Lisnagarvey transmitting station, Lisnagarvey, Northern Ireland, Lakihegy Tower, Lakihegy, Hungary, Vakarel Transmitter, Vakarel, Bulgaria and Stara Zagora Transmitter, Stara Zagora, Bulgaria. Several masts were razed on 16 May 2010. References External links * http://www.lvrtc.lv/tehres/popup.php?id=3 Towers in Latvia Radio masts and towers in Europe Buildings and structures in Riga {{Europe-mast-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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