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Telefunken TR 4
Telefunken was a German radio and television apparatus company, founded in Berlin in 1903, as a joint venture of Siemens & Halske and the ''Allgemeine Elektrizitäts-Gesellschaft'' (AEG) ('General electricity company'). The name "Telefunken" appears in: * the product brand name "Telefunken"; * ''Gesellschaft für drahtlose Telegraphie m.b.H., System Telefunken'', founded 1903 in Berlin as a subsidiary of AEG and Siemens & Halske; * ''Telefunken, Gesellschaft für drahtlose Telegraphie m.b.H.'' (from 1923 to 1955 – since 1941 subsidiary of the AEG only); * ''Telefunken GmbH'' in 1955; * ''Telefunken Aktiengesellschaft (AG)'' in 1963; * Merger of AEG and Telefunken to form ''Allgemeine Elektrizitäts-Gesellschaft AEG-Telefunken'' (from 1967 to 1979); * AEG-TELEFUNKEN AG (from 1979 to 1985); * ''TELEFUNKEN Fernseh und Rundfunk GmbH'', Hanover (1972, subsidiary of AEG-TELEFUNKEN); * Telefunken electronic GmbH (a spin-off of AEG-Telefunken and DASA * the company (since 1992 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin
Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constituent states, Berlin is surrounded by the State of Brandenburg and contiguous with Potsdam, Brandenburg's capital. Berlin's urban area, which has a population of around 4.5 million, is the second most populous urban area in Germany after the Ruhr. The Berlin-Brandenburg capital region has around 6.2 million inhabitants and is Germany's third-largest metropolitan region after the Rhine-Ruhr and Rhine-Main regions. Berlin straddles the banks of the Spree, which flows into the Havel (a tributary of the Elbe) in the western borough of Spandau. Among the city's main topographical features are the many lakes in the western and southeastern boroughs formed by the Spree, Havel and Dahme, the largest of which is Lake Müggelsee. Due to its l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Ferdinand Braun
Karl Ferdinand Braun (; 6 June 1850 – 20 April 1918) was a German electrical engineer, inventor, physicist and Nobel laureate in physics. Braun contributed significantly to the development of radio and television technology: he shared the 1909 Nobel Prize in Physics with Guglielmo Marconi "for their contributions to the development of wireless telegraphy", was a founder of Telefunken, one of the pioneering communications and television companies, and has been both called the "father of television" (shared with inventors like Paul Gottlieb Nipkow) and the co-father of the radio telegraphy, together with Marconi. Biography Braun was born in Fulda, Germany, and educated at the University of Marburg and received a PhD from the University of Berlin in 1872. In 1874, he discovered that a point-contact metal–semiconductor junction rectifies alternating current. He became director of the Physical Institute and professor of physics at the University of Strassburg in 1895. In 189 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teldec
Teldec (Telefunken-Decca Schallplatten GmbH) is a German record label in Hamburg, Germany. Today the label is a property of Warner Music Group. History Teldec was a producer of (first) shellac and (later) vinyl records. The Teldec manufacturing facility was located in Nortorf near Kiel in Germany. The company was founded in 1950 as a co-operation between Telefunken and Decca Records. The name Teldec is the result of taking the first three letters of both labels: Telefunken and Decca. Records manufactured by Teldec mostly were released under the Telefunken or Decca label, but normally these records contained no hint that they were made by Teldec. In 1983, Telefunken and Decca pulled out of Teldec and in 1987 Teldec was sold to Time Warner. In 1997, the remaining compact-disc production facility in Nortorf was to be closed by Time Warner, but after a management buyout, the new company OK Media, continued CD production. In 2001, after the merger of AOL & Time Warner, Teldec closed. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplifier, amplification and current rectifier, rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. The simplest vacuum tube, the diode (i.e. Fleming valve), invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abbey Road Studios
Abbey Road Studios (formerly EMI Recording Studios) is a recording studio at 3 Abbey Road, St John's Wood, City of Westminster, London, England. It was established in November 1931 by the Gramophone Company, a predecessor of British music company EMI, which owned it until Universal Music Group (UMG) took control of part of it in 2013. It is ultimately owned by UMG subsidiary Virgin Records Limited (until 2013 by EMI Records Limited, nowadays known as Parlophone Records and owned by UMG's competitor Warner Music Group). The studio's most notable client was the Beatles, who used the studio – particularly its Studio Two room – as the venue for many of the innovative recording techniques that they adopted throughout the 1960s. In 1976, the studio was renamed from EMI in honour of their final recorded album, ''Abbey Road''. In 2009, Abbey Road came under threat of sale to property developers. In response, the British Government protected the site, granting it English Herita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Beatles
The Beatles were an English Rock music, rock band, formed in Liverpool in 1960, that comprised John Lennon, Paul McCartney, George Harrison and Ringo Starr. They are regarded as the Cultural impact of the Beatles, most influential band of all time and were integral to the development of counterculture of the 1960s, 1960s counterculture and popular music's recognition as an art form. Rooted in skiffle, beat music, beat and 1950s rock and roll, rock 'n' roll, their sound incorporated elements of classical music and traditional pop in innovative ways; the band also explored music styles ranging from folk music, folk and Music of India, Indian music to Psychedelic music, psychedelia and hard rock. As Recording practices of the Beatles, pioneers in recording, songwriting and artistic presentation, the Beatles revolutionised many aspects of the music industry and were often publicised as leaders of the era's Baby boomers, youth and sociocultural movements. Led by primary songwriter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than long and wide, covering . It hosts key north European shipping lanes and is a major fishery. The coast is a popular destination for recreation and tourism in bordering countries, and a rich source of energy resources, including wind and wave power. The North Sea has featured prominently in geopolitical and military affairs, particularly in Northern Europe, from the Middle Ages to the modern era. It was also important globally through the power northern Europeans projected worldwide during much of the Middle Ages and into the modern era. The North Sea was the centre of the Vikings' rise. The Hanseatic League, the Dutch Republic, and the British each sought to gain command of the North Sea and access t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telefunken Kompass Sender
The Telefunken Kompass Sender was one of the earliest radio navigation systems to be deployed. It was developed in 1908 by the German electronics firm Telefunken. It was used primarily for long-distance navigation by Zeppelins, and was taken out of service around 1918. The system consisted of a series of 32 individual 60 m long cables supported in the center by a single mast and reaching the ground at their ends, forming a sort of umbrella-shaped device. Pairs of cables were wired to each other to form a series of sixteen 120 m long dipole antennas, now known as inverted-V antennas. The transmitter was first connected to all sixteen antennas and sent the morse code identifier for the station. After the identifier was sent and a specific time interval had passed, the system started switching on individual dipoles in order around the station. An aircraft located at some distance from the station would first listen for the identifier, and then when the time delay expired, st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeppelin
A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, pp. 155–157. and developed in detail in 1893.Dooley 2004, p. A.187. They were patented in Germany in 1895 and in the United States in 1899. After the outstanding success of the Zeppelin design, the word ''zeppelin'' came to be commonly used to refer to all rigid airships. Zeppelins were first flown commercially in 1910 by Deutsche Luftschiffahrts-AG (DELAG), the world's first airline in revenue service. By mid-1914, DELAG had carried over 10,000 fare-paying passengers on over 1,500 flights. During World War I, the German military made extensive use of Zeppelins as bombers and as scouts, resulting in over 500 deaths in bombing raids in Britain. The defeat of Germany in 1918 temporarily slowed the airship business. Although DELAG establish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Navigation
Radio navigation or radionavigation is the application of radio frequencies to determine a position of an object on the Earth, either the vessel or an obstruction. Like radiolocation, it is a type of radiodetermination. The basic principles are measurements from/to electric beacons, especially * Angular directions, e.g. by bearing, radio phases or interferometry, * Distances, e.g. ranging by measurement of time of flight between one transmitter and multiple receivers or vice versa, * Distance ''differences'' by measurement of times of arrival of signals from one transmitter to multiple receivers or vice versa * Partly also velocity, e.g. by means of radio Doppler shift. Combinations of these measurement principles also are important—e.g., many radars measure range and azimuth of a target. Bearing-measurement systems These systems used some form of directional radio antenna to determine the location of a broadcast station on the ground. Conventional navigation techniques a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraphic Address
A telegraphic address or cable address was a unique identifier code for a recipient of telegraph messages. Operators of telegraph services regulated the use of telegraphic addresses to prevent duplication. Rather like a uniform resource locator (URL), the telegraphic address did not contain any routing information (aside from possibly a city name), but instead could be looked up by telegraph office personnel, who would then manually direct the message to the office nearest the destination or to an intermediate office. Since the destination address of a telegram counted as part of the message, using a short registered address code saved the expense of sending a complete street address. Telegraphic addresses were chosen either as versions of a company's name or as a memorable short word somehow associated with the recipient. Occasionally, an organization would come to be best known by its telegraphic address, for example Interflora, Interpol and Oxfam. A telegraphic address was a val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
