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Wiederau Transmitter
The Wiederau transmitter is the oldest broadcasting facility in Saxony. It is located near Wiederau, a village which is part of the municipality of Pegau, and is used for medium-wave, FM and Television broadcasting. Wiederau transmitter went into service on October 28, 1932 as medium-wave transmitter for broadcasting supply of Saxony on 782 kHz. It had a transmission power of 120 kW and used a T-antenna, which was mounted on two 125-metre-tall wooden lattice towers. In spite of its high transmission power, reception of the Wiederau transmitter was not satisfactory at night times in areas more than 80 kilometres away from Wiederau, because the antenna radiated a great deal of skywave, resulting in fading. Therefore, in 1935 the T-antenna was replaced by a vertical wire antenna, which was hung up in a 150-metre-tall free-standing wooden lattice tower. In 1939, a second mediumwave transmitter was installed at Wiederau. This transmitter, which is still functional, was designe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Jamming
Radio jamming is the deliberate jamming, blocking or interference with wireless communications.https://apps.fcc.gov/edocs_public/attachmatch/DA-12-347A1.pdf Enforcement Advisory No. 2012-02 FCC Enforcement Advisory Cell Jammers, GPS Jammers, and Other Jamming Devices Consumer Alert: Using or Importing Jammers is Illegal In some cases, jammers work by the transmission of radio signals that disrupt communications by decreasing the signal-to-noise ratio. The concept can be used in wireless data networks to disrupt information flow. It is a common form of censorship in totalitarian countries, in order to prevent foreign radio stations in border areas from reaching the country. Jamming is usually distinguished from interference that can occur due to device malfunctions or other accidental circumstances. Devices that simply cause interference are regulated differently. Unintentional "jamming" occurs when an operator transmits on a busy frequency without first checking whether it is i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Reunification
German reunification (german: link=no, Deutsche Wiedervereinigung) was the process of re-establishing Germany as a united and fully sovereign state, which took place between 2 May 1989 and 15 March 1991. The day of 3 October 1990 when the German Reunification Treaty entered into force dissolving the German Democratic Republic (GDR; german: link=no, Deutsche Demokratische Republik, DDR, or East Germany) and integrating its recently re-established constituent federated states into the Federal Republic of Germany (FRG; german: link=no, Bundesrepublik Deutschland, BRD, or West Germany) to form present-day Germany, has been chosen as the customary '' German Unity Day'' () and has thereafter been celebrated each year from 1991 as a national holiday. East and West Berlin were united into a single city and eventually became the capital of reunited Germany. The East Germany's government led by the Socialist Unity Party of Germany (SED) (a communist party) started to falter on 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Programming
Radio programming is the process of organising a schedule of radio content for commercial broadcasting and public broadcasting by radio stations. History The original inventors of radio, from Guglielmo Marconi's time on, expected it to be used for one-on-one wireless communication tasks where telephones and telegraphs could not be used because of the problems involved in stringing copper wires from one point to another, such as in ship-to-shore communications. Those inventors had no expectations whatever that radio would become a major mass media entertainment and information medium earning many millions of dollars in revenues annually through radio advertising commercials or sponsorship. These latter uses were brought about after 1920 by business entrepreneurs such as David Sarnoff, who created the National Broadcasting Company (NBC), and William S. Paley, who built Columbia Broadcasting System (CBS). These broadcasting (as opposed to narrowcasting) business organizations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter Wachenbrunn
The Wachenbrunn transmitter was a large broadcasting facility for medium wave in Wachenbrunn near Themar, Thuringia, Germany, established in the 1950s. Until 1993 the main transmitter of this facility, the medium wave transmitter for 882 kHz was run with 250 kilowatts. In that year the transmission power of this transmitter, which was formerly used for transmitting the " Voice of DDR" and since the beginning of the 1990s for "MDR info" was reduced to 20 kilowatts. History Since 1988 the transmitter Wachenbrunn has also been the site of a medium wave transmitter of the Russian foreign radio service Voice of Russia (formerly Radio Moskau) on 1323 kHz. This transmitter is similar to the transmitter of "MDR info" run by Deutsche Telekom. In the afternoon and evening, a programme of the Voice of Russia was transmitted in German. With a power of 1000 kW, this transmitter was the third strongest in Germany. It used a directional aerial consisting of four 125.1 metre (407 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voice Of Russia
Voice of Russia ( rus, Голос России, r=Golos Rossii), commonly abbreviated VOR, was the Russian government's international radio broadcasting service from 1993 until 2014, when it was reorganised as Radio Sputnik. Its interval signal was a chime version of 'Majestic' chorus from the ''Great Gate of Kiev'' portion of '' Pictures at an Exhibition'' by Mussorgsky. History Russian President Boris Yeltsin issued a decree on 22 December 1993 which reorganised Radio Moscow under a new name: Voice of Russia. On 9 December 2013, Russian President Vladimir Putin issued a presidential decree dissolving the Voice of Russia as an agency, and merging it with RIA Novosti to form the '' Rossiya Segodnya'' international news agency. Margarita Simonyan, editor-in-chief of the Rossiya Segodnya, said in March 2014 that "We will stop using obsolete radio broadcasting models, when the signal is transmitted without any control and when it is impossible to calculate who listens to it a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blosenbergturm
The Blosenbergturm is a former radio transmission tower built for the German-language radio station DRS at Beromünster in the Canton of Lucerne, Switzerland, in 1937. It radiated first at 529 kHz and later at 531 kHZ, the lowest officially allocated frequency in the European medium-wave band. The Blosenbergturm is a self-radiating tower insulated against ground, i.e. the entire tower structure is used as an antenna. With a total height of it is currently the sixth tallest structure in Switzerland. It has a cabin at a height of , containing a coil for feeding the pinnacle, which is insulated against the rest of the tower, separately with high frequency power. Originally the tower was used as a dipole antenna, fed from the cabin. There was another, tall, freestanding lattice tower nearby, dismantled in 2011, which, like the Blosenbergturm, was a tower radiator insulated against ground. This tower, which was built in 1931, carried – together with a second tower, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wave Plan Of Geneva
The Geneva Frequency Plan of 1975 (Aka "The Final Acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975" or simply "GE75") is the internationally agreed frequency plan which was drawn up to implement the provisions of the Final Acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) held in Geneva, Switzerland, in 1975. It covers radio broadcasting in the long and medium wave bands outside the Americas ( separate agreements being in place for North and South America). The plan was drawn up under the auspices of the World Administrative Radio Conference (WARC) of the International Telecommunication Union (ITU) with the assistance of the European Broadcasting Union (EBU/UER). The Geneva plan replaced the 1948 Copenhagen plan. It became necessary because of the large number of broadcasting stations in these frequency ranges leading to ever more mutual interference (Many countries had refused to ratify the Copen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mühlacker Transmitter
Mühlacker is a town in the eastern part of the Enz district of Baden-Württemberg, Germany. Mühlacker station has direct rail connections with Stuttgart, Karlsruhe, Heidelberg, Pforzheim and the Northern Black Forest. Mühlhausen an der Enz where Spree killer Ernst August Wagner killed 13 people in 1913 has been a part of the city since 1972. The community of Ötisheim joined onto the city so as to act as a single municipality for certain tasks. History Thirty Years' War The Thirty Years' War brought hardship and misery. In 1648 only 50 inhabitants survived from originally 1242 inhabitants (1622). In the Nine Years' War (1688-1697) Dürrmenz was looted in 1692 by French troops. Eckenweiher was incorporated to Dürrmenz in 1832. Industrialisation With the opening of the Württemberg Western Railway Stuttgart - Bruchsal in 1853 the industrial age began in the Dürrmenz-Mühlacker area. As the Karlsruhe-Mühlacker railway was built in 1863, Mühlacker was at the sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundwave
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves. Gravity waves can also occur within liquids, at the interface between two fluids with different densities. Elastic surface waves can travel along the surface of solids, such as ''Rayleigh'' or ''Love'' waves. Electromagnetic waves can also propagate as "surface waves" in that they can be guided along with a refractive index gradient or along an interface between two media having different dielectric constants. In radio transmission, a ''ground wave'' is a guided wave that propagates close to the surface of the Earth. Mechanical waves In seismology, several types of surface waves are encountered. Surface waves, in this mechanical sense, are commonly known as either ''Love waves'' (L waves) or ''Rayleigh waves''. A seismic wave is a wave that ''travels through the Earth, often as the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explosive
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An explosive charge is a measured quantity of explosive material, which may either be composed solely of one ingredient or be a mixture containing at least two substances. The potential energy stored in an explosive material may, for example, be * chemical energy, such as nitroglycerin or grain dust * pressurized gas, such as a gas cylinder, aerosol can, or BLEVE * nuclear energy, such as in the fissile isotopes uranium-235 and plutonium-239 Explosive materials may be categorized by the speed at which they expand. Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives". Explosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demolition
Demolition (also known as razing, cartage, and wrecking) is the science and engineering in safely and efficiently tearing down of buildings and other artificial structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for reuse purposes. For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rock-breakers attached to excavators to cut or break through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
