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searching for Spark gap 184 found (263 total)

alternate case: spark gap

Seismic source (2,268 words) [view diff] exact match in snippet view article find links to article

higher frequency signals. A plasma sound source (PSS), otherwise called a spark gap sound source, or simply a sparker, is a means of making a very low frequency

CRC Handbook of Chemistry and Physics (570 words) [view diff] no match in snippet view article find links to article

Tension of Fused Salts", "Percent Composition of Anti-Freeze Solutions", "Spark-gap Voltages", "Greek Alphabet", "Musical Scales", "Pigments and Dyes", "Comparison

Etheric force (878 words) [view diff] exact match in snippet view article find links to article

with the Acoustic Telegraph when they noticed that a rapidly vibrating spark gap produced a spark in an adjacent relay. Subsequent investigation showed

Induction coil (3,089 words) [view diff] no match in snippet view article find links to article

the first type of transformer. It was widely used in x-ray machines, spark-gap radio transmitters, arc lighting and quack medical electrotherapy devices

Transmitter (2,455 words) [view diff] exact match in snippet view article find links to article

type-approved before sale. The first primitive radio transmitters (called spark gap transmitters) were built by German physicist Heinrich Hertz in 1887 during

Max Wien (477 words) [view diff] exact match in snippet view article find links to article

did research into the efficiency of early radio transmitters, called spark gap transmitters, which used an electric spark to generate radio waves. In

Julie Bertagna (702 words) [view diff] case mismatch in snippet view article find links to article

journalist for various publications. She published her first book, The Spark Gap, when she was 25 years old. She currently writes full-time and lives in

Interrupter (684 words) [view diff] exact match in snippet view article find links to article

high voltage pulses in scientific experiments and to power arc lamps, spark gap radio transmitters, and the first X-ray tubes, around the turn of the

History of the Tesla coil (9,140 words) [view diff] exact match in snippet view article find links to article

elements of the Tesla coil: high voltage primary transformer, capacitor, spark gap, and air core "oscillation transformer". . During the Industrial Revolution

Cyril Frank Elwell (575 words) [view diff] exact match in snippet view article find links to article

communication after investigating a system for voice transmission by spark gap transmitter invented by Francis Joseph McCarty (1888-1906) in 1902. After

Arc converter (2,036 words) [view diff] exact match in snippet view article find links to article

spark gap and produces damped oscillations. Continuous or ‘undamped’ waves (CW) were an important feature, since the use of damped waves from spark-gap

Electrical discharge machining (5,255 words) [view diff] no match in snippet view article find links to article

vary with time. The inter-electrode distance, often also referred to as spark-gap, is the result of the control algorithms of the specific machine used

Edward Bennett (physicist) (126 words) [view diff] no match in snippet view article

known as the Western University of Pennsylvania) in 1897. The work was on spark-gap transmitters, jointly with William Bradshaw and supervised by Reginald

Massie Wireless Station (1,679 words) [view diff] no match in snippet view article find links to article

new building, the one that is preserved today, on the same site. The spark-gap transmitter operated at up to 2 kW power and was connected to an antenna

Coherer (3,064 words) [view diff] no match in snippet view article find links to article

tin-plate toy manufacturer Matsudaya Toy Co. who beginning 1957 used a spark-gap transmitter and coherer-based receiver in a range of radio-controlled

Damped wave (radio transmission) (373 words) [view diff] exact match in snippet view article

method of radio transmission produced by the first radio transmitters (spark gap transmitters) which consisted of a series of damped radio waves. Information

Reginald Fessenden (7,254 words) [view diff] no match in snippet view article find links to article

conclusion that he could develop a far more efficient system than the spark-gap transmitter and coherer-receiver combination which had been created by

Transmission-line pulse (547 words) [view diff] exact match in snippet view article find links to article

Higgins, M. Key, and S. Majumdar realized a TLP-based laser-triggered spark gap for kilovolt pulses of accurately variable timing in 1969. For investigation

History of radio (8,484 words) [view diff] no match in snippet view article find links to article

conclusion that he could develop a far more efficient system than the spark-gap transmitter and coherer receiver combination. To this end he worked on

Wireless telegraphy (3,603 words) [view diff] no match in snippet view article find links to article

several different modulation methods during its history. The primitive spark-gap transmitters used until 1920 transmitted damped waves, which had very

X-ray (12,432 words) [view diff] exact match in snippet view article find links to article

X-ray tube. A spark gap was typically connected to the high voltage side in parallel to the tube and used for diagnostic purposes. The spark gap allowed detecting

TEA laser (1,371 words) [view diff] exact match in snippet view article find links to article

discharge capacitor rapidly switched across the laser electrodes using a spark gap or thyratron provided the high voltage pulses. These first "Pin-Bar" TEA

Invention of radio (12,792 words) [view diff] exact match in snippet view article find links to article

test apparatus. Using a Ruhmkorff coil to create sparks across a gap (a spark gap transmitter) and observing the sparks created between the gap in a nearby

Radio stations in German South West Africa (578 words) [view diff] no match in snippet view article find links to article

Africa territory and with German boats at sea. The stations utilized spark-gap transmitters. The introduction of wireless telegraphy was a significant

Trembler coil (1,661 words) [view diff] no match in snippet view article find links to article

widely used around the turn of the century to produce high voltage for spark-gap radio transmitters, x-ray machines, arc lights, and medical electrotherapy

Thunder house (244 words) [view diff] exact match in snippet view article find links to article

runs along a piece of wood placed on the façade. Inside the house is a spark gap housed in a small brass cylinder containing a small quantity of gunpowder

Demarcation point (1,430 words) [view diff] no match in snippet view article find links to article

divestiture usually do not contain a test jack. They only contained a spark-gap surge protector, a grounding post and mount point to connect a single

Spark micrometer (294 words) [view diff] exact match in snippet view article find links to article

Hertz found that a spark in a nearby apparatus could induce a spark in a spark gap between the ends of a loop of wire not attached to any source of electricity

Alexanderson alternator (2,562 words) [view diff] exact match in snippet view article find links to article

were discovered in 1887, the first generation of radio transmitters, the spark gap transmitters, produced strings of damped waves, pulses of radio waves

CQ (call) (1,013 words) [view diff] no match in snippet view article

Marconi Company in 1904 for use in wireless telegraphy, at that time via spark-gap transmitters, and was adopted internationally at the London 1912 International

Capacitor discharge ignition (2,627 words) [view diff] exact match in snippet view article find links to article

when discussing CDI spark energy is the actual energy provided to the spark gap versus the energy applied to the primary side of the coil. As a simple

Radio shack (329 words) [view diff] exact match in snippet view article find links to article

experimental and often home-built. The first radio transmitters used a loud spark gap to generate radio waves, and so were often housed in a separate outbuilding

August Toepler (1,408 words) [view diff] no match in snippet view article find links to article

contact with the inner shields of two Leiden jars, and with the arms of the spark-gap, two brass bars equipped with spherules and insulation handles, into which

Georges Lakhovsky (555 words) [view diff] exact match in snippet view article find links to article

high voltage and high frequency impulses from a generator, usually a spark gap Tesla coil or Oudin coil. If set up correctly, the unit is supposed to

Hiram Percy Maxim (1,567 words) [view diff] no match in snippet view article find links to article

which is now the ARRL Headquarters club station call sign. His rotary spark-gap transmitter "Old Betsy" has a place of honor at the ARRL Headquarters

Microwave (6,963 words) [view diff] exact match in snippet view article find links to article

existence of electromagnetic waves, generating radio waves using a primitive spark gap radio transmitter. Hertz and the other early radio researchers were interested

LC circuit (5,471 words) [view diff] no match in snippet view article find links to article

discovery of radio waves, showing the length of spark obtainable from his spark-gap LC resonator detectors as a function of frequency. One of the first demonstrations

Umbrella antenna (2,476 words) [view diff] no match in snippet view article find links to article

during the wireless telegraphy era, about 1900 to 1920, and used with spark-gap transmitters on longwave bands to transmit information by Morse code.

Ignition coil (884 words) [view diff] exact match in snippet view article find links to article

premature sparking at the start of the primary pulse, a diode or secondary spark gap is installed in the coil to block the reverse pulse that would otherwise

Creed & Company (367 words) [view diff] no match in snippet view article find links to article

limited at that time in the UK. Among the items produced were amplifiers, spark-gap transmitters, aircraft compasses, high-voltage generators, bomb release

RLC circuit (6,606 words) [view diff] no match in snippet view article find links to article

discovery of radio waves, showing the length of spark obtainable from his spark-gap LC resonator detectors as a function of frequency. One of the first demonstrations

Telenor Kystradio (3,853 words) [view diff] no match in snippet view article find links to article

World War I (1914–1918), and Stavanger Radio did not open until 1919. The spark-gap transmitter created interference with other American radio stations and

Air-gap flash (651 words) [view diff] exact match in snippet view article find links to article

Eugene Edgerton, though the earlier scientist Ernst Mach also used a spark gap as a fast photographic lighting system. William Henry Fox Talbot is said

AM broadcasting (9,169 words) [view diff] no match in snippet view article find links to article

originally known as "Hertzian radiation" and "wireless telegraphy", used spark-gap transmitters that could only transmit the dots-and-dashes of Morse code

Amplitude modulation (4,576 words) [view diff] exact match in snippet view article find links to article

send audio signals by radio waves. The first radio transmitters, called spark gap transmitters, transmitted information by wireless telegraphy, using pulses

Hillsboro wireless tower (895 words) [view diff] exact match in snippet view article find links to article

steel, the station cost $300,000 to build. KGH used synchronous rotary spark gap transmitters. A 3 kW set for close ships and a 5 kW transmitter for ships

Ultra-wideband (3,558 words) [view diff] no match in snippet view article find links to article

same spectrum. Earlier, the only radio technology that used pulses was spark-gap transmitters, which international treaties banned because they interfere

Eudiometer (1,282 words) [view diff] exact match in snippet view article find links to article

a eudiometer. Two electrodes were fed through the tube and produced a spark gap inside the tube. Volta's initial use of this instrument concerned the

Electronic countermeasure (1,445 words) [view diff] no match in snippet view article find links to article

interrupted wireless communication between a group of Japanese battleships. The spark-gap transmitters in the Russian stations generated senseless noise while the

Edward S. Rogers Sr. (986 words) [view diff] no match in snippet view article find links to article

in 1919. Two years later, Rogers operated the only Canadian (and only spark-gap) station to successfully compete in the first amateur trans-Atlantic radio

Index of wave articles (37 words) [view diff] no match in snippet view article find links to article

Sneaker wave Solitary wave Soliton Sonar Sonic anemometers Sound wave Spark-gap transmitter Spectroscopy Speed of gravity Speed of light Speed of sound

Superheterodyne receiver (6,598 words) [view diff] exact match in snippet view article find links to article

higher power and much higher efficiency than the older spark gap systems. In contrast to the spark gap, however, the output from the alternator was a pure

Artie Moore (920 words) [view diff] no match in snippet view article find links to article

rudimentary radio station consisting of a coherer-based receiver and a spark-gap transmitter, also powered by batteries charged from the mill wheel. He

Spark plug (1,635 words) [view diff] exact match in snippet view article find links to article

Multiple side electrodes generally provide longer life, as when the spark gap widens due to electric discharge wear, the spark moves to another closer

Outline of radio (402 words) [view diff] no match in snippet view article find links to article

Radio programming History of radio Invention of radio Wireless telegraphy Spark-gap transmitter Alexanderson alternator Antique radio Coherer Continuous wave

Leyden jar (3,734 words) [view diff] no match in snippet view article find links to article

electrostatics experiments, and later in high-voltage equipment such as spark-gap radio transmitters and electrotherapy machines. Originally, the amount

Relay league (171 words) [view diff] no match in snippet view article find links to article

conducted in the first two decades of the 20th century using Morse code via spark-gap transmitters. As vacuum tubes became affordable, operations shifted to

Electrolytic detector (1,053 words) [view diff] no match in snippet view article find links to article

evaporate. Electronics portal Hot-wire barretter Coherer Crystal Radio Spark-gap transmitter Radio receiver Antique radio Camille Papin Tissot Sarkar,

Vacuum tube (15,318 words) [view diff] exact match in snippet view article find links to article

Although some applications had used earlier technologies such as the spark gap transmitter for radio or mechanical computers for computing, it was the

Quench (disambiguation) (287 words) [view diff] no match in snippet view article

oscillation the process of stopping an electrical arc, for example in a fuse or Spark-gap transmitter in an internal combustion engine, the rapid cooling of fuel

SSTC (107 words) [view diff] exact match in snippet view article find links to article

coil, a Tesla coil that uses semiconductors in place of the traditional spark gap Silver Strand Training Complex, near San Diego, California, U.S. Starship

Title 47 CFR Part 15 (1,569 words) [view diff] no match in snippet view article find links to article

47 CFR 15.5 prohibits intentional damped wave transmissions such as spark-gap transmitters which were common before the 1920s but occupy a needlessly

Colorado Springs Notes, 1899–1900 (606 words) [view diff] exact match in snippet view article find links to article

Nikola Tesla envisaged a world wide communication system using a huge spark gap transmitter located in Colorado Springs in 1899. A few years later he

Survival radio (1,652 words) [view diff] exact match in snippet view article find links to article

the sinking of the RMS Titanic in 1912. Lifeboats were equipped with spark gap transmitters such as the Marconi Type 241, c. 1920. These operated using

Magnetic detector (1,718 words) [view diff] exact match in snippet view article find links to article

to summon help during its famous 15 April 1912 sinking. The primitive spark gap radio transmitters used during the first three decades of radio (1886-1916)

Nauen Transmitter Station (2,379 words) [view diff] exact match in snippet view article find links to article

August 1906, and operational service began on 16 August 1906 using a 25 kW spark gap transmitter designed by von Arco, which fed an umbrella antenna supported

Jar (unit) (141 words) [view diff] no match in snippet view article

that one farad is 9×108 jars and one jar is 1111 picofarads. With early spark-gap transmitters, changing the transmission frequency was most easily accomplished

Inductive output tube (1,363 words) [view diff] exact match in snippet view article find links to article

trigger a crowbar circuit based on a hydrogen thyratron or a triggered spark gap in the high-voltage supply. The purpose of the crowbar circuit is to instantly

Gladys Kathleen Parkin (658 words) [view diff] no match in snippet view article find links to article

California. Parkin designed all her own instruments, including a ¼ kilowatt spark-gap transmitter. Parkin was featured on the cover of the October 1916 issue

Morse code (9,760 words) [view diff] exact match in snippet view article find links to article

and radio circuits. Although previous transmitters were bulky and the spark gap system of transmission was dangerous and difficult to use, there had been

WSUI (1,584 words) [view diff] exact match in snippet view article find links to article

university electrical engineering students were operating a 2,000 watt spark gap transmitter at a 750-meter wavelength that could be heard 1000 miles away

Angus Book Award (129 words) [view diff] case mismatch in snippet view article find links to article

Unbeliever Winner Lynne Reid Banks Broken Bridge Finalist Julie Bertagna The Spark Gap Finalist Ann Halam The Powerhouse Finalist Ian Strachan Which Way Is Home

Fogo Island (Newfoundland and Labrador) (2,297 words) [view diff] no match in snippet view article

once operational atop a hill near the town of Fogo; operating with a spark-gap transmitter to establish maritime communications, the station was forced

Self-oscillation (943 words) [view diff] no match in snippet view article find links to article

stimulated by the work of Heinrich Hertz, starting in 1887, in which he used a spark-gap transmitter to generate radio waves that he showed correspond to electrical

Walter G. Roman (571 words) [view diff] case mismatch in snippet view article find links to article

Electrical Apparatus US Patent 2,279,249 — 1939, Spark Gap Device US Patent 2,365,595 — 1939, Spark Gap Device US Patent 2,376,815 — 1942, Molded Lightning

Marconi and Marconi Wireless Station National Historic Sites (622 words) [view diff] exact match in snippet view article find links to article

message was sent across the Atlantic Ocean to England from this site. A spark gap transmitter with 75 kilowatts of power fed four tall antennas on the 2-hectare

Pirate radio (2,837 words) [view diff] no match in snippet view article find links to article

tube technology, early radio enthusiasts used (electronically) noisy spark-gap transmitters. The navy soon began complaining to a sympathetic press that

List of plasma physics articles (195 words) [view diff] no match in snippet view article find links to article

Shuttle Space Shuttle thermal protection system Space tether missions Spark-gap transmitter Spark plasma sintering Spaser Spectral imaging Spectral line

Karl Ferdinand Braun (1,323 words) [view diff] exact match in snippet view article find links to article

of distance they could cover. Connecting the antenna directly to the spark gap produced only a heavily damped pulse train. There were only a few cycles

Lens antenna (1,739 words) [view diff] exact match in snippet view article find links to article

Bose, Lodge, and Righi. A spark gap transmitter (A), consisting of a dipole antenna made of two brass rods with a spark gap between them inside an open

Overheating (electricity) (907 words) [view diff] no match in snippet view article

caused from any accidental fault of the circuit (such as short-circuit or spark-gap), or may be caused from a wrong design or manufacture (such as the lack

KWSU (AM) (1,088 words) [view diff] no match in snippet view article

in radio communication, initially with Morse code transmissions using spark-gap transmitters, reportedly began in 1908. In early 1916, the college was

Alfred Matthew Hubbard (942 words) [view diff] exact match in snippet view article find links to article

supposed "ionizing effect" of polonium 210 upon the combustion gases in the spark gap was purported to "improve engine efficiency". Motion was said to be among

Shunt (electrical) (1,637 words) [view diff] exact match in snippet view article

equipment. Another older form of lightning arrester employs a simple narrow spark gap, over which an arc will jump when a high voltage is present. While this

Augusto Righi (675 words) [view diff] exact match in snippet view article find links to article

metal ball spark oscillator, and detecting them with a dipole antenna and spark gap. He used his spark transmitter and detector at wavelengths of 20, 7.5

PIN diode (2,178 words) [view diff] exact match in snippet view article find links to article

recovery time of gas molecules that permits the creation of the higher power spark gap input protection device ultimately relies on similar physics in a gas

Valdemar Poulsen (1,390 words) [view diff] no match in snippet view article find links to article

made it a generator of continuous radio waves, which, unlike earlier spark-gap transmisssins, could be used for audio transmissions. The most important

Radar (11,751 words) [view diff] no match in snippet view article find links to article

tube for detecting distant lightning strikes. The next year, he added a spark-gap transmitter. In 1897, while testing this equipment for communicating between

Somerset, New Jersey (2,611 words) [view diff] no match in snippet view article find links to article

facility in Belmar, New Jersey. During World War I, the original Marconi spark-gap transmitter was replaced with an Alexanderson alternator, the invention

Frederick G. Creed (988 words) [view diff] no match in snippet view article find links to article

were very limited in the UK. Among the items produced were amplifiers, spark-gap transmitters, aircraft compasses, high-voltage generators, bomb release

Birkeland–Eyde process (1,100 words) [view diff] exact match in snippet view article find links to article

disc of sparks by placing the ends of a U-shaped electromagnet around a spark gap so that the gap between them was perpendicular to the gap between the

Plasma cutting (1,920 words) [view diff] exact match in snippet view article find links to article

disadvantages, including risk of electrocution, difficulty of repair, spark gap maintenance, and the large amount of radio frequency emissions. Plasma

Detonator (3,061 words) [view diff] exact match in snippet view article find links to article

In 1868, Henry Julius Smith of Boston introduced a cap that combined a spark gap ignitor and mercury fulminate, the first electric cap able to detonate

500 kHz (1,568 words) [view diff] no match in snippet view article find links to article

Communication was generally conducted in Morse code, initially using spark-gap transmitters. Most two-way radio contacts were to be initiated on this

Charles F. Brush (1,719 words) [view diff] exact match in snippet view article find links to article

Electric Machine) 1877 U.S. patent 189,997 Arc light (automatic control of spark gap) 1878 U.S. patent 203,411 Arc light (double-carbon lamp regulation system)

Radio (14,997 words) [view diff] exact match in snippet view article find links to article

Maxwell's theory, first observed radio waves he generated using a primitive spark gap transmitter. Experiments by Hertz and physicists Jagadish Chandra Bose

Rounder Records (3,968 words) [view diff] case mismatch in snippet view article find links to article

became Rounder's first release, Rounder 0001. Rounder 0002 was by the Spark Gap Wonder Boys; a local band, the album was recorded at the Harvard and MIT

Single-wire earth return (2,914 words) [view diff] exact match in snippet view article find links to article

capacity (HRC) fuse or low voltage circuit breaker. A surge arrestor (spark gap) on the high voltage side is common, especially in lightning-prone areas

Grimeton Radio Station (2,570 words) [view diff] exact match in snippet view article find links to article

at longer range than the damped waves which were used by the earlier spark gap transmitters. The alternator was chosen because it was already used in

Museum of Radio and Technology (592 words) [view diff] exact match in snippet view article find links to article

wireless communication began, with a working "crystal radio" and a rotary spark gap demonstrator. 1940s-1950s show room: Visit a typical radio and television

Swedish Army Signal Troops (1,112 words) [view diff] no match in snippet view article find links to article

Stockholm, but already two years earlier, experiments began not only with spark-gap transmitter but also with military ballooning and aviation equipment:

Ion reactor (350 words) [view diff] exact match in snippet view article find links to article

when I isolated the reactor from the exciter, this power remained. The spark gap regulator became active, keeping the power at this level. I only allowed

Aleksandr Popov (physicist) (3,179 words) [view diff] no match in snippet view article

wireless telegraphy system based on "Hertzian" (radio) waves, developing a spark-gap transmitter and a much improved automatically reset coherer receiver.

WRUC (3,110 words) [view diff] no match in snippet view article find links to article

the summer of 1916, Dr. E. J. Berg and Dr. Alex Stevenson installed a spark-gap transmitter at the College, which could only transmit the dots-and-dashes

KGFX (AM) (1,540 words) [view diff] no match in snippet view article

with virtually all amateur stations of this era, 9ZP was equipped with a spark-gap transmitter which was only capable of transmitting the dots-and-dashes

Fifty Foot Hose (688 words) [view diff] exact match in snippet view article find links to article

twin audio generators, squeaky stick, white noise generator, theremin, spark gap, and saw blades), Walter Funk III (jokers Ulysses and Cupid constructed

Reginald A. Fessenden House (458 words) [view diff] no match in snippet view article find links to article

and produced a stream of inventions. In 1904 he invented the rotary spark-gap transmitter, and in 1906 he built a large transmitter in Massachusetts

Electromagnetic compatibility (3,264 words) [view diff] no match in snippet view article find links to article

said that radio interference and its correction arose with the first spark-gap experiment of Marconi in the late 1800s. As radio communications developed

Titanic (22,582 words) [view diff] no match in snippet view article find links to article

office. The ship was equipped with a 'state of the art' 5-kilowatt rotary spark-gap transmitter, with the wireless telegraph call sign MGY, and communication

List of Marconi wireless stations (6,227 words) [view diff] exact match in snippet view article find links to article

serve as a coast guard marine radio station. As the original, powerful spark gap transmitters would create large quantities of electrical interference

List of experiments (2,419 words) [view diff] exact match in snippet view article find links to article

waves, predicted by Maxwell's equations, with a simple dipole antenna and spark gap oscillator. Thomson's experiments with cathode rays (1897): J. J. Thomson's

Jack Phillips (wireless officer) (2,210 words) [view diff] exact match in snippet view article

relative proximity (and the fact that both Evans and Phillips were using spark gap wireless sets whose signals bled across the spectrum and were impossible

Autodyne (1,165 words) [view diff] exact match in snippet view article find links to article

result of the available technologies to generate radio frequencies. See spark gap transmitter. The transmitters could be keyed on and off to send Morse

Triode (3,670 words) [view diff] no match in snippet view article find links to article

radio transmitters replaced the cumbersome inefficient "damped wave" spark-gap transmitters, allowing the transmission of sound by amplitude modulation

Tom Swift and His Wireless Message (215 words) [view diff] no match in snippet view article find links to article

and working together, they are able to survive as Tom Swift builds a spark-gap transmitter radio from salvaged parts. Tom Swift used the older and more

Gas-filled tube (3,373 words) [view diff] exact match in snippet view article find links to article

cathode switching tube Trigatron, a high-current switch similar to a spark gap Alphatron, a form of ionization tube for measuring vacuum Dekatron, a

Electrical engineering (8,262 words) [view diff] no match in snippet view article find links to article

Heinrich Hertz proved Maxwell's theory by transmitting radio waves with a spark-gap transmitter, and detected them by using simple electrical devices. Other

WHA (AM) (3,512 words) [view diff] exact match in snippet view article

Electrical Engineering department professor Edward Bennett constructed a spark gap transmitter, which was only capable of transmitting the dots-and-dashes

Ionosphere (6,455 words) [view diff] no match in snippet view article find links to article

antenna for reception. The transmitting station in Poldhu, Cornwall, used a spark-gap transmitter to produce a signal with a frequency of approximately 500 kHz

Heterodyne (3,837 words) [view diff] exact match in snippet view article find links to article

transmitters with the technology of the day. Early transmitters were spark gap transmitters. A mechanical device would make sparks at a fixed but audible

Rudolf Goldschmidt (966 words) [view diff] no match in snippet view article find links to article

new continuous wave signals. The first type of radio transmitter, the spark-gap transmitter, produced strings of damped waves that were heard as a buzz

Crystal detector (8,404 words) [view diff] exact match in snippet view article find links to article

wireless telegraphy or "spark" era, primitive radio transmitters called spark gap transmitters were used, which generated radio waves by an electric spark

American Radio Relay League (3,598 words) [view diff] exact match in snippet view article find links to article

growing commercialization of radio, equipment rapidly improved. The use of spark gap technology quickly disappeared as the more efficient continuous wave system

KCBS (AM) (4,371 words) [view diff] no match in snippet view article

antenna was constructed atop the building. The earliest transmissions used spark-gap transmitters which could only transmit the dots-and-dashes of Morse code

Leo C. Young (1,356 words) [view diff] no match in snippet view article find links to article

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

Telecommunications (9,255 words) [view diff] exact match in snippet view article find links to article

computers. While some applications had used earlier technologies such as the spark gap transmitter for radio or mechanical computers for computing, it was the

British telephone socket (3,921 words) [view diff] exact match in snippet view article find links to article

in 600 ohms. Until recently,[when?] this socket contained an enclosed spark gap, SP1, that could safely flash over internally to provide high voltage

WGI (radio station) (2,859 words) [view diff] no match in snippet view article

two decades of radio development, transmissions were primarily made by spark-gap transmitters, which were only capable of sending Morse code dots-and-dashes

Linear particle accelerator (5,040 words) [view diff] exact match in snippet view article find links to article

88-inch long, two gap version of the device. Where Ising had proposed a spark gap as the voltage source, Wideroe used a 25kV vacuum tube oscillator. He

Parabolic antenna (4,880 words) [view diff] no match in snippet view article find links to article

reflector made of zinc sheet metal supported by a wooden frame, and had a spark-gap excited 26 cm dipole as a feed antenna along the focal line. Its aperture

Joseph Bethenod (1,018 words) [view diff] no match in snippet view article find links to article

the application of resonant transformers to charging the capacitors of spark-gap transmitters. He became a friend of the officers Émile Girardeau and Paul

Hiram Maxim (3,688 words) [view diff] exact match in snippet view article find links to article

veteran experimenters of pre-war days by the musical tone of his quench spark gap which spelled out the call letters of his pioneer station. Maxim, Hiram

Edwin Beer (559 words) [view diff] no match in snippet view article find links to article

Reinhold Wappler (American inventor of the electrical apparatus used for spark-gap electrocautery) whether his technique might be used for urology. Beer

Jonathan Nash Hearder (1,555 words) [view diff] exact match in snippet view article find links to article

procedures included steadily moving a paper strip through an induction coil's spark gap, enabling him to feel perforation holes and thus estimate the coil's frequency

Jeløy Radio (696 words) [view diff] no match in snippet view article find links to article

in 1910. This resulted in the opening of Stavanger Radio in 1919. The spark-gap transmitter created interference with other American radio stations and

Guglielmo Marconi (8,927 words) [view diff] exact match in snippet view article find links to article

It consisted of an elevated copper sheet (top) connected to a Righi spark gap (left) powered by an induction coil (center) with a telegraph key (right)

Christian Hülsmeyer (1,933 words) [view diff] no match in snippet view article find links to article

in a British technical magazine. The Telemobiloscope was primarily a spark-gap transmitter connected to an array of dipole antennas, and a coherer receiver

Charles Herrold (2,613 words) [view diff] no match in snippet view article find links to article

signals to distribute the programming more efficiently. The original spark-gap transmitters used for radio signalling could only transmit Morse code

Jan Mayen (4,963 words) [view diff] no match in snippet view article find links to article

eastern side of the Island. The radiostation consisted of a 3 kW Telefunken spark-gap transmitter and a 55 m (180 ft) wooden radiomast. The station was destroyed

List of fantasy authors (6,546 words) [view diff] case mismatch in snippet view article find links to article

of queer speculative fiction Julie Bertagna, (born 1962) author of the Spark Gap series Anne Bishop, author of the Black Jewels Trilogy Holly Black, (born

John Stone Stone (2,950 words) [view diff] exact match in snippet view article find links to article

current General bolometer, Lloyd Espenschied, Boston Navy Yard Radio spark gap transmitter, break key, wireless telegraph, antenna "Stone, John Stone"

Norddeich radio station (1,177 words) [view diff] no match in snippet view article find links to article

Channel. In 1907 Norddeich Radio started its operation with a Telefunken spark-gap transmitter and an antenna suspended from four masts 65 m high as

RCA (9,437 words) [view diff] no match in snippet view article find links to article

Jersey. It proved to be superior for transatlantic transmissions to the Spark-gap transmitters that had been traditionally used by the Marconi companies

Oliver Lodge (5,020 words) [view diff] exact match in snippet view article find links to article

found the charge would take a shorter high resistance route jumping a spark gap, instead of taking a longer low resistance route through a loop of copper

Eugène Adrien Ducretet (528 words) [view diff] no match in snippet view article find links to article

Ducretet's spark-gap transmitter apparatus.

Timeline of physical chemistry (270 words) [view diff] exact match in snippet view article find links to article

consisted of a coil with a spark gap, where a spark would be seen upon detection of EM waves transmitted from another spark gap source. 1888 Johannes Rydberg

Technology during World War I (6,702 words) [view diff] no match in snippet view article find links to article

communication during World War I. The stations utilized at that time were spark-gap transmitters. As an example, the information of the start of World War I

Lecher line (2,015 words) [view diff] no match in snippet view article find links to article

Ernst Lecher's original 1888 apparatus. Waves generated by the Hertzian spark-gap oscillator at right are coupled into the wires by the two metal plate

List of Reginald Fessenden patents (1,785 words) [view diff] exact match in snippet view article find links to article

patent 706,741, "Apparatus for Wireless Telegraphy" (compressed air spark gap transmitter) – 12 August 1902 U.S. patent 706,742, "Wireless Signaling"

Aktiv Grizzly (356 words) [view diff] exact match in snippet view article find links to article

Ignition/Generator CDI 12V/140W Spark Plug NGK B7ES, B8ES or similar Spark gap 0,5 mm Carburettor 1x Mikuni VM 32 Fuel Unleaded Petrol, 90 Oc. or better

Theodore J. Williams (1,410 words) [view diff] case mismatch in snippet view article find links to article

Distillation. Ohio State University 1959. The Theory and Design of the Triggered Spark Gap. U.S. Atomic Energy Commission, Division of Technical Information. 1960s

Harry Shoemaker (1,780 words) [view diff] no match in snippet view article find links to article

fascinated Shoemaker conducted further experiments at his home, using a spark-gap transmitter, plus a coherer receiver of his own design, which used a galvanometer's

Lee de Forest (8,948 words) [view diff] no match in snippet view article find links to article

signals. He traced its inspiration to 1900, when, experimenting with a spark-gap transmitter, he briefly thought that the flickering of a nearby gas flame

History of electronic engineering (2,674 words) [view diff] no match in snippet view article find links to article

enable wireless telegraphy were invented before 1900. These include the spark-gap transmitter and the coherer with early demonstrations and published findings

Robert Goldschmidt (1,845 words) [view diff] no match in snippet view article find links to article

The Congo stations and the high-powered Laeken station had standard spark-gap transmitters which were only capable of transmitting the dots-and-dashes

Waverley Amateur Radio Society (743 words) [view diff] no match in snippet view article find links to article

foundation, the club obtained its first licence for a one valve receiver and spark-gap transmitter on a wavelength of 200 meters. Meetings until 1954 were held

1900s (10,085 words) [view diff] no match in snippet view article find links to article

broadcast daily time signals and weather reports, but these employed spark-gap transmitters, transmitting in Morse code). On the evening of December

Warsaw radio mast (3,989 words) [view diff] exact match in snippet view article find links to article

this technique provides better lightning protection than using just a spark gap at the mast base, as it is standard at most mast radiators insulated against

Timeline of electromagnetism and classical optics (6,112 words) [view diff] exact match in snippet view article find links to article

electromagnetic (EM) radio waves. His receiver consists of a coil with a spark gap. 1888 – Introduction of the induction motor, an electric motor that harnesses

Wireless Hill Park (2,056 words) [view diff] no match in snippet view article find links to article

road in Perth. When the station opened in 1912 it used a 25 kW quenched spark-gap transmitter manufactured by Telefunken, and a receiver with a locally

Max I. Silber (1,642 words) [view diff] case mismatch in snippet view article find links to article

2007-09-30. Retrieved 2007-09-12. "Special Event Station N1S Announced". The Spark Gap. Meridian Amateur Radio Club. 2004. Retrieved 2007-09-12. "Search Call

Q code (2,703 words) [view diff] no match in snippet view article find links to article

"Shall I increase / decrease my spark frequency?", but in the 1920s spark-gap transmitters were gradually being banned from land stations, making that

Technological and industrial history of the United States (12,370 words) [view diff] no match in snippet view article find links to article

April 1899 by Professor Jerome Green at the University of Notre Dame. The spark-gap transmitters initially employed could only transmit the dots-and-dashes

Radio in the United States (14,190 words) [view diff] no match in snippet view article find links to article

April 1899 by Professor Jerome Green at the University of Notre Dame. The spark-gap transmitters initially employed could only transmit the dots-and-dashes

Index of electrical engineering articles (3,721 words) [view diff] no match in snippet view article find links to article

Sound recording – Space flight – Space vector modulation – Spark spread – Spark-gap transmitter – Spectrum analyzer – Speech processing – SPICE – Split phase

Fern Blodgett Sunde (1,819 words) [view diff] no match in snippet view article find links to article

wireless radio operator, or sparks (a colloquialism derived from the spark-gap transmitters used at the time). Sunde's salary was $170 per month plus

Screaming Bloody Murder Tour (2,818 words) [view diff] case mismatch in snippet view article find links to article

(February 6–9, 2011) Riverboat Gamblers (October 27–December 1, 2010) Spark Gap (July 13, 2011) Templeton Pek (February 22, 2011; August 9, 2012) The

Goldschmidt alternator (2,047 words) [view diff] no match in snippet view article find links to article

realized that the existing technology for generating radio waves, the spark-gap transmitter, was inadequate because it generated damped waves. Efforts

List of Nikola Tesla patents (9,585 words) [view diff] exact match in snippet view article find links to article

devices; Discharges take place in insulating liquids (such as oil); Varying spark gap distances; Keep circulating flow in liquid; Illustrates preferred manner

Military radio antenna kites (1,740 words) [view diff] no match in snippet view article find links to article

balloon to provide extra lift. The King kite was used with small portable spark-gap transmitters, and the elevated antenna made little improvement in the

Radio transmitter design (4,334 words) [view diff] no match in snippet view article find links to article

recognized that the signals emitted by transmitters had to be 'pure'. Spark-gap transmitters were outlawed once better technology was available as they

Capacitor types (12,946 words) [view diff] no match in snippet view article find links to article

applications during World War II Air-gap capacitors—used by the first spark-gap transmitters Miscellaneous capacitors Some 1 nF × 500 VDC rated silver

Glossary of electrical and electronics engineering (19,286 words) [view diff] no match in snippet view article find links to article

selling a unit of electricity and the cost of the fuel used to make it. spark-gap transmitter A former type of radio transmitter that generated radio frequency

List of English inventions and discoveries (16,528 words) [view diff] no match in snippet view article find links to article

earliest television systems. 1879: The first radio transmission, using a spark-gap transmitter (achieving a range of approximately 500 metres), made by David

Experimenter Publishing (5,325 words) [view diff] no match in snippet view article find links to article

components and electrical components by mail order. An early product was a spark-gap telegraph transmitter with a one-mile range that was first advertised

Trionic T5.5 (3,500 words) [view diff] exact match in snippet view article find links to article

an 80 V voltage. This means that an 80 V voltage is applied across the spark gap of the spark plugs, except when the spark is fired. When combustion has

Spark extinguishing system (1,254 words) [view diff] exact match in snippet view article find links to article

source can be extinguished reliably. This distance is called quenched spark gap and is calculated based on the transport speed of the material and the

Paul W. Beck (6,022 words) [view diff] no match in snippet view article find links to article

makeshift affair, weighing thirty-two pounds. It consisted of a small spark-gap and interrupter, an ordinary telegraph-key, a small storage cell and a

AI Mark VIII radar (18,759 words) [view diff] exact match in snippet view article find links to article

solution was suggested by Epsley of GEC, who used a tuned circuit of two spark gap tubes and dummy loads to switch off the receiver's input using the magnetron's

John Call Cook (7,473 words) [view diff] no match in snippet view article find links to article

Johanna. During his teens, John constructed various devices including a spark-gap device, a batteryless crystal radio, a six-inch telescope, and an underwater

Radar in World War II (22,065 words) [view diff] exact match in snippet view article find links to article

German and foreign patents for an apparatus, the Telemobilskop, using a spark gap transmitter that could detect ships and prevent collisions; this is often

Mahlon Loomis (6,975 words) [view diff] no match in snippet view article find links to article

on his analysis of Loomis notebooks, he had inadvertently created a "spark-gap" radio transmitter, similar to what early radio inventors would employ

KMS Fusion (4,755 words) [view diff] exact match in snippet view article find links to article

lenses. A single 30 ps pulse started at the oscillator by a laser-driven spark gap was divided into a specific number of temporarily delayed pulses which

SS Canastota (8,095 words) [view diff] no match in snippet view article find links to article

powerful radio transmitter, a two-kilowatt American Marconi quenched spark-gap transmitter. It was first thought possible that Canastota may have experienced