Leo C. Young
   HOME
*





Leo C. Young
Leo C. Young (12 January 1891 – 16 January 1981) was an American radio engineer who had many accomplishments during a long career at the U.S. Naval Research Laboratory. Although self-educated, he was a member of a small, creative team which some attributed to the developing the world's first true radar system. Background and career Leo Crawford Young grew up on a farm near Van Wert, Ohio. Although his formal education stopped with high-school, he was self-educated in early radio technology. He built his first crystal radio when he was 14 years old. To receive stations, he learned the Morse code, and soon built his own spark-gap transmitter, joining the ranks of amateur radio enthusiasts in the pre-license days. (Young was later issued the call sign W3WV). After high school, he used his ability with Morse code to gain employment as a railroad telegrapher. In 1913, he joined the Naval Communications Reserves and set up the central control station for the Navy-Amateur Network. The ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Van Wert, Ohio
Van Wert is a city in and the county seat of Van Wert County, Ohio, United States. The municipality is located in northwestern Ohio approximately 77 mi (123 km) SW of Toledo and 34 mi (54 km) SE of Fort Wayne, Indiana. The population was 10,846 at the 2010 census. It is the principal city of and is included in the Van Wert Micropolitan Statistical Area, which is included in the Lima-Van Wert-Wapakoneta, Ohio Combined Statistical Area. Van Wert is named for Isaac Van Wart, one of the captors of Major John André in the American Revolutionary War. A center of peony cultivation, Van Wert has hosted the annual Van Wert Peony Festival on and off since 1902. Van Wert is home to the first county library in the United States, the Brumback Library. It also has a thriving community art center, the Wassenburg Art Center, and the award-winning Van Wert Civic Theatre. The home office of Central Insurance Companies is located in Van Wert. History Van Wert was surveyed ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

NAA (Arlington, Virginia)
NAA was a major radio facility located at 701 Courthouse Road in Arlington, Virginia. It was operated by the U.S. Navy from 1913 until 1941. The station was originally constructed as the Navy's first high-powered transmitter for communicating with its bases across the U.S. and the Caribbean. During its years of operation NAA was best known for broadcasting daily time signals, however, it also provided a variety of additional services, using multiple transmitters operating on frequencies ranging from longwave to shortwave. The station also conducted extensive experimental work, including, in 1915, the Navy's first transatlantic transmission of speech. History The establishment of NAA was the first step of an ambitious U.S. military project to establish reliable long distance radio communication. (At this time radio was commonly known as "wireless telegraphy".) The site chosen for the NAA installation, which became known as "Radio, Virginia", was across the Potomac River from Wash ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Oscilloscope
An oscilloscope (informally a scope) is a type of electronic test instrument that graphically displays varying electrical voltages as a two-dimensional plot of one or more signals as a function of time. The main purposes are to display repetitive or single waveforms on the screen that would otherwise occur too briefly to be perceived by the human eye. The displayed waveform can then be analyzed for properties such as amplitude, frequency, rise time, time interval, distortion, and others. Originally, calculation of these values required manually measuring the waveform against the scales built into the screen of the instrument. Modern digital instruments may calculate and display these properties directly. Oscilloscopes are used in the sciences, medicine, engineering, automotive and the telecommunications industry. General-purpose instruments are used for maintenance of electronic equipment and laboratory work. Special-purpose oscilloscopes may be used to analyze an automotive ign ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Robert Morris Page
Robert Morris Page (2 June 1903 – 15 May 1992) was an American physicist who was a leading figure in the development of radar technology. Later, Page served as the Director of Research for the U.S. Naval Research Laboratory. Life and career Page was born in Saint Paul, Minnesota, the son of a Methodist minister. He attended Hamline University, a small Methodist-supported school in St. Paul. Originally intending to become a minister, he changed his studies to physics and in 1927 received his B.S. degree in this field. Page immediately joined the U.S. Naval Research Laboratory (NRL) in Washington, D.C. as a junior physicist. Somewhat later he started part-time studies at George Washington University, eventually earning a M.S. degree. Although Page had no formal education in electrical engineering, building radios had been his hobby since childhood. Assigned to the NRL Radio Division, he quickly gained the confidence of the Division Superintendent, A. Hoyt Taylor, by providing ve ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Signal Corps Laboratories
Signal Corps Laboratories (SCL) was formed on June 30, 1930, as part of the U.S. Army Signal Corps at Fort Monmouth, New Jersey. Through the years, the SCL had a number of changes in name, but remained the operation providing research and development services for the Signal Corps. Background At the beginning of World War I in 1917, the U.S. Army Signal Corps opened a training facility named Camp Vail in east-central New Jersey. This facility was named after Alfred Vail, an inventor associated with Samuel F. B. Morse. Later that year, the Army established the Signal Corps Radio Laboratories at Camp Vail, devoted to research in radio and electronics. The overall installation was upgraded and became Fort Vail. Under the direction of Col. (Dr.) George Owen Squier, the Radio Laboratories centered on the standardization of vacuum tubes and the testing of equipment manufactured for the Army by commercial firms. Experimentation was also being done on radio communications with aircraft, det ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Lawrence A
Lawrence may refer to: Education Colleges and universities * Lawrence Technological University, a university in Southfield, Michigan, United States * Lawrence University, a liberal arts university in Appleton, Wisconsin, United States Preparatory & high schools * Lawrence Academy at Groton, a preparatory school in Groton, Massachusetts, United States * Lawrence College, Ghora Gali, a high school in Pakistan * Lawrence School, Lovedale, a high school in India * The Lawrence School, Sanawar, a high school in India Research laboratories * Lawrence Berkeley National Laboratory, United States * Lawrence Livermore National Laboratory, United States People * Lawrence (given name), including a list of people with the name * Lawrence (surname), including a list of people with the name * Lawrence (band), an American soul-pop group * Lawrence (judge royal) (died after 1180), Hungarian nobleman, Judge royal 1164–1172 * Lawrence (musician), Lawrence Hayward (born 1961), British musician * ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Kennelly–Heaviside Layer
The Heaviside layer, sometimes called the Kennelly–Heaviside layer, named after Arthur E. Kennelly and Oliver Heaviside, is a layer of ionised gas occurring roughly between 90km and 150 km (56 and 93 mi) above the ground — one of several layers in the Earth's ionosphere. It is also known as the E region. It reflects medium-frequency radio waves. Because of this reflective layer, radio waves radiated into the sky can return to Earth beyond the horizon. This "skywave" or "skip" propagation technique has been used since the 1920s for radio communication at long distances, up to transcontinental distances. Propagation is affected by the time of day. During the daytime the solar wind presses this layer closer to the Earth, thereby limiting how far it can reflect radio waves. Conversely, on the night ( lee) side of the Earth, the solar wind drags the ionosphere further away, thereby greatly increasing the range which radio waves can travel by reflection. The exten ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Ionosphere
The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical importance because, among other functions, it influences radio propagation to distant places on Earth. History of discovery As early as 1839, the German mathematician and physicist Carl Friedrich Gauss postulated that an electrically conducting region of the atmosphere could account for observed variations of Earth's magnetic field. Sixty years later, Guglielmo Marconi received the first trans-Atlantic radio signal on December 12, 1901, in St. John's, Newfoundland (now in Canada) using a kite-supported antenna for reception. The transmitting station in Poldhu, Cornwall, used a spark-gap transmitter to produce a signal with a freq ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Carnegie Institution Of Washington
The Carnegie Institution of Washington (the organization's legal name), known also for public purposes as the Carnegie Institution for Science (CIS), is an organization in the United States established to fund and perform scientific research. The institution is headquartered in Washington, D.C. , the Institution's endowment was valued at $926.9 million. In 2018 the expenses for scientific programs and administration were $96.6 million. Eric Isaacs is president of the institution. Name More than 20 independent organizations were established through the philanthropy of Andrew Carnegie and now feature his surname. They perform work involving topics as diverse as art, education, international affairs, world peace, and scientific research. In 2007, the Carnegie Institution of Washington adopted the public name "Carnegie Institution for Science" to distinguish itself from other organizations established by and named for Andrew Carnegie. The Institution remains officially and legall ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Merle A
Merle may refer to: People *Merle (given name), a given name used by both men and women *Merle (surname), a surname of French origin Others *Merle (dog coat), a pattern in dogs’ coats *Merle (grape), another name for the wine grape Merlot *Akaflieg München Mü17 Merle, a German glider originally built in 1938 for the 1940 Olympics gliding competition * MS ''Phocine'', a ferry formerly named MS ''Merle'' *Merle's Tune, a hymn tune composed by Hal Hopson in 1983 *A Crusader fort near Tantura on the coast of Israel *The French name for the common blackbird See also *Merl (other) *Merles Merles (; oc, Mèrles) is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France. See also *Communes of the Tarn-et-Garonne department The following is a list of the 195 communes of the Tarn-et-Garonne depar ...
, a commune in southern France {{disambiguation ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  




Gregory Breit
Gregory Breit (russian: Григорий Альфредович Брейт-Шнайдер, ''Grigory Alfredovich Breit-Shneider''; July 14, 1899, Mykolaiv, Kherson Governorate – September 13, 1981, Salem, Oregon) was a Russian-born Jewish American physicist and professor at New York University (1929–1934), University of Wisconsin–Madison (1934–1947), Yale University (1947–1968), and University at Buffalo (1968–1973). In 1921, he was Paul Ehrenfest's assistant in Leiden University. Biography After completing his Ph.D. at age 22, he was from 1923 to 1924 an assistant professor at the University of Minnesota. In 1925, while at the Carnegie Institution of Washington, Breit joined with Merle Tuve in using a pulsed radio transmitter to determine the height of the ionosphere, a technique important later in radar development. Together with Eugene Wigner, Breit gave a description of particle resonant states with the relativistic Breit–Wigner distribution in 1929, and wit ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

High-frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or "skywave" propagation – these frequencies are suitable for long-distance communication across intercontinental distances and for mountainous terrains which prevent line-of-sight communications. The band is used by international shortwave broadcasting stations (3 ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]