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Inductor in a transmission line
A loading coil, or load coil, is an inductor that is inserted into an electronic circuit to increase its inductance. The term originated in the 19th century
Loading_coil
Circuit within a circuit
the inductance being inserted by the loading coils, and hence the loading effect. It works because the loading coils used on balanced lines have two windings
Phantom_circuit
Device that transmits and receives radio waves
only 1.5 meters tall would require the addition of a loading coil. Then it may be said that the coil has lengthened the antenna to achieve an electrical
Antenna_(radio)
Type of radio antenna
loading coils and grounds rather than one, the equivalent loading coil and ground resistance, and therefore the power dissipated in the loading coil and
T-antenna
Type of radio antenna
called a "quarter-wave whip" (although often shortened by the use of a loading coil; see Electrically short whips below). For example, the common quarter-wave
Whip_antenna
Type of radio antenna consisting of a loop or coil
“electric” antennas, matching using a loading coil also generates high voltages at the antenna end(s) and in the loading coil, however unlike capacitors, the
Loop_antenna
American electrical engineer
important contributions were to the theory and implementation of the use of loading coils and the first wave filters designed to what was to become known as the
George_Ashley_Campbell
Topics referred to by the same term
Look up loading in Wiktionary, the free dictionary. Loading may refer to: Carbohydrate loading, a strategy employed by endurance athletes to maximize the
Loading
Electrical component
An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil (spiral or helix). Electromagnetic coils are used in electrical
Electromagnetic_coil
3–30 kHz range of the electromagnetic spectrum
cables supported several feet above the ground under the antenna. A large loading coil is required at the antenna feed point to cancel the capacitive reactance
Very_low_frequency
Family of technologies that are used to transmit digital data over telephone lines
disqualified from eligibility because of loading coil placement. Because of this, phone companies endeavor to remove loading coils on copper loops that can operate
Digital_subscriber_line
Type of radio transmitter
changed by adjustable taps on the coil. The antenna was brought into resonance with the tuned circuit using loading coils. The energy in each spark, and
Spark-gap_transmitter
Type of rolling stock
type of coil car, coils of sheet metals were carried on-end or in cradles in open or covered gondolas. Load shifting, damage, and awkward loading and unloading
Coil_car
Electrical resonant transformer circuit invented by Nikola Tesla
A Tesla coil is an electrical resonant transformer device designed by inventor Nikola Tesla in 1891. It is used to produce high voltage, low current, high
Tesla_coil
Device to couple energy between circuits
circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's
Transformer
Land mobile radio system
shorter antennas include loading coils to make the antenna impedance the same as a physically longer antenna. The loading coil may be on the bottom, middle
Citizens_band_radio
Mechanical device that stores energy
would compress 1 inch with 100 pounds (45 kg) of load. Types of coil spring are: Tension/extension coil springs, designed to resist stretching. They usually
Coil_spring
Class of radio antenna
stored alternately as an electrostatic field in the top load and a magnetic field in the loading coil, is hundreds of times the energy input from the transmitter
Monopole_antenna
Elastic object that stores mechanical energy
rigid material (typically metal) bent or molded into a form (especially a coil) that can return into shape after being compressed, extended or twisted.
Spring_(device)
Antenna consisting of two rod-shaped conductors
feedpoint impedance includes a large capacitive reactance requiring a loading coil or other matching network in order to be practical, especially as a transmitting
Dipole_antenna
Device for measuring alternating current
A Rogowski coil, named after Walter Rogowski, is an electrical device for measuring alternating current (AC) or high-speed current pulses. It sometimes
Rogowski_coil
Monopole antenna
can be fed power efficiently, an impedance matching inductor called a loading coil is connected in series with the feedline at the base of the antenna.
Umbrella_antenna
Type of radio frequency antenna
antenna (given by the graph below), and includes a reactance, usually a loading coil, to tune out the reactance of the antenna, to make it resonant at the
Mast_radiator
Filter used in signal processing on continuous-time signals
Electrician, 3 June 1887 Brittain, James E. (1970). "The Introduction of the Loading Coil: George A. Campbell and Michael I. Pupin". Technology and Culture. 11
Analogue_filter
Parameter characterizing an AC conductor
/2} ) will have capacitive reactance. Adding an inductor (coil of wire), called a loading coil, at the feedpoint in series with the antenna, with inductive
Electrical_length
300–3000 kHz range of the electromagnetic spectrum
as inverted-L or T antennas, which are brought into resonance with a loading coil at their base. Receiving antennas do not have to be as efficient as transmitting
Medium_frequency
Amateur radio frequency band
need to compensate with a large inductive loading coil to bring the antenna to resonance. However a large coil loses power through resistive heating of
80-meter_band
Serbian-American electrical engineer and inventor (1858–1935)
extending the range of long-distance telephone communication by placing loading coils (of wire) at predetermined intervals along the transmitting wire (known
Mihajlo_Pupin
Antenna constructions for different applications
reactance. Like other ultra-short antennas they require both a large loading coil and a meticulously constructed low-resistance counterpoise system to
Antenna_types
Transfer of energy between circuits
Directional coupler Equilibrium length Optocoupler Fiber-optic coupling Loading coil Shield List of electronics topics AC Coupling Impedance matching Impedance
Coupling_(electronics)
Nickel–iron alloy with high magnetic permeability
help protect electronic equipment from external magnetic interference. Loading coil Mu-metal Sendust Supermalloy (a material with even higher magnetic permeability)
Permalloy
electric currents. A tuned circuit, consisting of a capacitor connected to a coil of wire, which acted as a bandpass filter to select the desired signal out
History_of_radio_receivers
Type of radio antenna
reactance, so to make them resonant at the operating frequency an inductor (loading coil) is added in series with the antenna. Antennas which have these inductors
Rubber_ducky_antenna
British artillery piece
An Armstrong gun was a type of rifled breech-loading field and heavy artillery piece designed by Sir William Armstrong. It was first manufactured in England
Armstrong_gun
Type of wiring used for communications
inductors are known as load coils and reduce attenuation for voiceband frequencies but increase it on higher frequencies. Load coils reduce distortion in
Twisted_pair
Object used to guide and confine magnetic fields
filters, resonant circuits, loading coils, transformers, chokes, etc. The material was first introduced in 1940, used in loading coils to compensate capacitance
Magnetic_core
journal}}: Cite journal requires |journal= (help) Bošnjak, Marija. "PUPIN COILS AND PUPINIZATION OF THE TELEPHONE LINES" (PDF). rukautestu.vin.bg.ac.rs
List of Serbian inventions and discoveries
List_of_Serbian_inventions_and_discoveries
Topics referred to by the same term
legal aid services Cuban Liberty Council Center Loaded Coil in a radio antenna, see Loading coil#Radio antenna CLC (gene), Charcot-Leyden crystal protein
CLC
Carrier system for digital transmission of multiplexed telephone calls
typical of Bell System outside plant of the time in that, to accommodate loading coils, cable vault manholes were physically 2,000 meters (6,600 feet) apart
T-carrier
Flow control device
allow excessive pressure to force the valve open against the spring-loading. Coil springs are normally used. Typical spring materials include zinc plated
Valve
Converts an electrical audio signal into a corresponding sound
coil—a coil of wire capable of moving axially in a cylindrical gap containing a concentrated magnetic field produced by a permanent magnet—the coil is
Loudspeaker
Ratio of active power to apparent power
moving coils, A and B, are connected in parallel with the circuit load. One coil, A, will be connected through a resistor and the second coil, B, through
Power_factor
Telecommunications device
Relay League Electrical lengthening Impedance bridging Loading coil Preselector Smith chart "Load Pull for Power Devices". microwaves101.com. Retrieved
Antenna_tuner
2016. Retrieved January 5, 2020. "NIHF Inductee Michael Pupin Invented Loading Coils". www.invent.org. June 4, 2024. "NIHF Inductee N. Joseph Woodland Created
List of National Inventors Hall of Fame inductees
List_of_National_Inventors_Hall_of_Fame_inductees
of video game companies – LM741 – Low-noise amplifier – Loading characteristic – Loading coil – Lobe – Local battery – Logic families – Logic gate – Logic
Index_of_electronics_articles
Former undersea telegraph cable
see telegrapher's equations. This has to be solved by iron tape or by load coils. It was not until the 20th century that message transmission speeds over
Transatlantic_telegraph_cable
Early telecommunication transmission technology
New York City to Denver in 1911. Despite heavy-gauge wire, and using loading coils to reduce transmission loss, talking was just barely possible over the
Open_wire
American telecommunications company
Early long-distance circuits required large copper conductors and loading coils to reduce attenuation over long distances. The development of vacuum-tube
AT&T Communications (1984–2010)
AT&T_Communications_(1984–2010)
Telephone call made by Alexander Graham Bell
New York City. By 1892 this line reached Chicago. After introducing loading coils in 1899, the long-distance line continued west, and by 1911 it reached
First transcontinental telephone call
First_transcontinental_telephone_call
Type of motorcycle
to change ignition timing based on both RPM and load. Coil on plug ignition replaced the remote coil ignition design. The crankshaft was lightened and
Kawasaki_Ninja_ZX-9R
Optimal condition for a hypothetical transmission line
adding discrete loading coils at regular intervals. This is not identical to a distributed loading, the difference being that with loading coils there is distortionless
Heaviside_condition
Russia/Ukraine – X-rays Michael I. Pupin (1858–1935), Serbia – pupinization (loading coils), tunable oscillator Tivadar Puskás (1844–1893), Hungary – telephone
List_of_inventors
Manufacture of electromagnetic coils
In electrical engineering, coil winding is the manufacture of electromagnetic coils. Coils are used as components of circuits, and to provide the magnetic
Coil_winding_technology
Passive two-terminal electrical component that stores energy in its magnetic field
An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when an electric
Inductor
Access to the Internet via telephone line
kilometres from the phone exchange. Other factors such as long loops, loading coils, pair gain, electric fences (usually in rural locations), and digital
Dial-up_Internet_access
English electronics engineer (1903–1942)
and 1926, Blumlein and John Percy Johns designed an improved form of loading coil which reduced loss and crosstalk in long-distance telephone lines. These
Alan_Blumlein
Equipment used to transfer heat between fluids
circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another
Heat_exchanger
Electrically operated switch
and coil connections, respectively. DIN 72552 defines contact numbers in relays for automotive use: 85 = relay coil - 86 = relay coil + 87 = to load (normally
Relay
Radio navigation system
insulated from ground. The masts are inductively lengthened and fed by a loading coil (see: electrical length). A well known-example of a station using such
Loran-C
Electrical circuit with two conductors of equal impedance
distances—the longest was the 1500 km from New York to Chicago built in 1893. Loading coils were used to improve the distance achievable with cable but the problem
Balanced_line
Magnetic part used in electric guitars and basses
A single-coil pickup is a type of magnetic transducer, or pickup, for the electric guitar and the electric bass. It electromagnetically converts the vibration
Single-coil_guitar_pickup
Transoceanic communication line placed on the seabed
1940s. A first attempt to lay a "pupinized" telephone cable—one with loading coils added at regular intervals—failed in the early 1930s due to the Great
Submarine communications cable
Submarine_communications_cable
Form taken by the network of interconnections of a circuit
17–18, 24–26 Zemanian, p.x Brittain, James E., The introduction of the loading coil: George A. Campbell and Michael I. Pupin", Technology and Culture, vol
Circuit_topology_(electrical)
Type of electrical resistance from an antenna
this level. Since the ohmic resistance of the huge ground system and loading coil cannot be made lower than about 0.5 ohm, the efficiency of a simple vertical
Radiation_resistance
Type of mass spectrometry that uses an inductively coupled plasma to ionize the sample
energized (ionized) by inductively heating the gas with an electromagnetic coil, and contains a sufficient concentration of ions and electrons to make the
Inductively coupled plasma mass spectrometry
Inductively_coupled_plasma_mass_spectrometry
Telecommunications circuit which can transmit in two directions simultaneously
20th century, the inductive load of traditional hybrids became a liability for computer modem users, and remaining loading coils in subscriber lines were
Two-wire_circuit
carrying program material. It is necessary to remove or cancel any loading coils in the line before equalization can be successful. Equalization was
Equalization_(communications)
American radio receiver manufacturer (1921–1956)
tuned antenna circuit consisting of a variable capacitor and tapped loading coil selected the incoming signal. The first triode amplified the RF signal
Crosley_Radio_(1921–1956)
Danish telegraph engineer
expensive compared to the previously existing method of adding discrete loading coils at intervals along the cable. Against this, Krarup cable is lighter
Carl_Emil_Krarup
High-rating electrical circuit switch
rated by designed load current per contact (pole), maximum fault withstand current, duty cycle, design life expectancy, voltage, and coil voltage. A general
Contactor
British mathematician and electrical engineer (1850–1925)
Henry Preece of the Post Office, because part of the proposal was that loading coils (inductors) should be added to telephone and telegraph lines to increase
Oliver_Heaviside
Electric spark system to ignite a fuel-air mixture
starting in cold weather. Early cars used ignition magneto and trembler coil systems, which were superseded by Distributor-based systems (first used in
Ignition_system
Measure of change in amplitude and phase of a wave
real line is unlikely to meet this condition without the addition of loading coils and, furthermore, there are some frequency dependent effects operating
Propagation_constant
Any analogy between electrical and mechanical systems, used for modelling
first demonstrated the use of loading coils to improve telephone lines in 1899, he calculated the distance needed between coils by analogy with the work of
Mechanical–electrical analogies
Mechanical–electrical_analogies
people. Voja Antonić: Galaksija home computer (1983). Mihajlo Pupin: Loading coil Mihajlo Pupin Institute: HRS-100 CER Computers ATLAS-TIM AT 32 Nikola
List of Serbian inventors and discoverers
List_of_Serbian_inventors_and_discoverers
Typical center-loaded mobile CB antenna. Note the loading coil, which shortens the antenna's overall length.
Citizens_band_radio_in_India
Third-party monitoring of electronic communications
the original on 2016-11-18. Retrieved 2014-07-22. "An Introduction to Load Coils and Bridge Taps". Private Investigators UK. 2011-07-22. Retrieved 2014-07-22
Wiretapping
Signal processing device
difficult because of the very high voltages that occur in the huge tuned loading coils that are used in the antenna feed. Diplexers are also used for non-broadcast
Diplexer
Artillery using coils to electromagnetically propel a projectile
A coilgun is a type of mass driver consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic
Coilgun
of: flyback transformers, resonant circuits, quartz filters, loading coils, choke coils, pulse transformers, and other industrial and military circuits
Molypermalloy_powder_core
telephone line caused by the action of telegraph direct currents on the loading coils. In recording and reproducing equipment, the deviation of frequency
Flutter (electronics and communication)
Flutter_(electronics_and_communication)
Type of computer network modem; network equipment
devices installed in telephone lines by the phone company, such as loading coils and bridge taps, block the signal, and may disqualify a given phone
DSL_modem
Broadcasting facility in Devon, England
had a break at 94.5 metres (310 ft) to allow for the insertion of a loading coil. The station obtained power from two 11 kV mains feeders and a 400 kW
Start Point transmitting station
Start_Point_transmitting_station
Long-distance telephone system in North America of 1929
become commercially successful until after 1900, and the invention of the loading coil. In 1907, Theodore Vail became president of the American Telephone and
General_Toll_Switching_Plan
Electronic filter
constant k filter. This can be seen as a continuation of his work on loading coils on transmission lines, a concept invented by Oliver Heaviside. Heaviside
Composite_image_filter
30–300 kHz range of the electromagnetic spectrum
dissipating transmitter power. These electrically short antennas need loading coils at the base of the antenna to bring them into resonance. Many antenna
Low_frequency
Type of electrical circuit
transformers due to the two-coil T connected to a secondary two-coil T instead of the traditional three-coil primary to three-coil secondary transformer. In
Scott-T_transformer
Cable Production Factory, 1920, Bydgoszcz, Poland
was acquired, for the production of intercity cables, telephone and loading coil for telegraphy. At the beginning of the 1930s, the shared capital was
Bydgoszcz_Cable_Factory
Patents and licensing affecting early radio technology
1900-06-19 Art of reducing attenuation of electrical waves Introduced the loading coil, enabling long-distance transmission in telephone and radio circuits
Patents and licensing in early radio
Patents_and_licensing_in_early_radio
Method of telephone line cabling
Dictionary 23rd Edition 2003, Newton, Harry; p110 "An Introduction to Load Coils and Bridge Taps". Archived from the original on 2007-11-15. Retrieved
Bridge_tap
Motor which works on direct current
The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either electromechanical
DC_motor
equipment – The comments regarding amplifiers apply here as well. Add loading coils to reduce the attenuation of voice signals over long loops. These have
Digital_loop_carrier
Device that converts sound into an electrical signal
electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses
Microphone
Method of fastening or securing linear material
due to the weakening effects of knots, aging, damage, shock loading, etc. The working load limit of a rope is generally specified with a significant safety
Knot
Type of audible sound
vibration), electromagnetically excited acoustic noise, or more commonly known as coil whine, is audible sound directly produced by materials vibrating under the
Electromagnetically induced acoustic noise
Electromagnetically_induced_acoustic_noise
System designed to maintain a constant voltage
to sudden load loss or faults. This is an older type of regulator used in the 1920s that uses the principle of a fixed-position field coil and a second
Voltage_regulator
British rifle cartridge
Breech-Loading Martini Henry Mark I, was made of coiled brass sheet .003 in (0.076 mm) thick with a strengthening strip of brass inside the coil and the
.577/450_Martini–Henry
Electric motor driven by an AC electrical input
AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field,
AC_motor
Polarity-switching electronic circuit
state. Typical primary coil driver is to simply replace the two terminals of the DC motor by the two terminals of the primary coil. The switching current
H-bridge
George Ashley Campbell in the US to implement the idea when he added loading coils to a telephone line for the first time in 1900. Telegraph companies
Electrical telegraphy in the United Kingdom
Electrical_telegraphy_in_the_United_Kingdom
LOADING COIL
LOADING COIL
Surname or Lastname
English
English : unexplained.
Surname or Lastname
English
English : topographic name for someone who lived at a place where wood was cut, Middle English wo(o)ding.
Surname or Lastname
English
English : from a Middle English personal name Lyfing, Old English Lēofing, based on lēof ‘dear’.Swedish : apparently an ornamental name formed from the place-name element lov-, meaning unknown, + the suffix -ing (see Arning).
Surname or Lastname
English
English : patronymic from Good.
Surname or Lastname
English
English : from the late Old English personal name Golding, in form a patronymic from Golda (see Gold 4).German : patronymic from a short form of a Germanic personal name formed with gold, guld ‘gold’, ‘bright’.Jewish (from Latvia and Lithuania) : habitational name from Golding, the German and Yiddish name of the city of Kuldīga in Latvia.
Surname or Lastname
English
English : habitational name from the county seat of Berkshire, which gets its name from Old English Rēadingas ‘people of Rēad(a)’, a byname meaning ‘red’.English : topographic name for someone who lived in a clearing, an unattested Old English ryding.
Boy/Male
British, English
Son of Gold; Little Golden One
Surname or Lastname
English (Somerset)
English (Somerset) : unexplained.
Boy/Male
American, Anglo, British, English
Son of the Red-haired
Boy/Male
English
Son Of Gold.
Surname or Lastname
English
English : variant of Holden.
Boy/Male
English
Son of Reed.
Surname or Lastname
English
English : ethnic name from Old French Lohereng ‘man from Lorraine’ (see Lorraine).
Surname or Lastname
Danish
Danish : probably a habitational name from Kolding. This was originally the name of a river, from kaldr ‘cold’ + a derivational suffix -ung, hence ‘the cold river’.English : perhaps a spelling variant of Golding.
Surname or Lastname
English
English : variant of Leeming.
Surname or Lastname
English (Hampshire and the Isle of Wight)
English (Hampshire and the Isle of Wight) : habitational name from a place on the Isle of Wight named Brading, from Old English brerd ‘hillside’ + -ingas ‘dwellers at’, i.e. ‘(settlement of) the dwellers on the hillside’.
Surname or Lastname
English
English : variant of Gooding.German (Göding) : variant of Godding.
Surname or Lastname
English
English : variant of Dowden.
Boy/Male
German
Renowned Warrior's Son
Surname or Lastname
English and German
English and German : patronymic from Bold as a personal name.Danish : habitational name from a place so named in Jutland.
LOADING COIL
LOADING COIL
Boy/Male
Buddhist, French, Indian, Russian
Prosperous Cowherd
Girl/Female
Arabic, Muslim
Of Elegant; Statue; Soft; Lovely; Beautiful; Graceful; Delicate
Girl/Female
Tamil
Kokilapriya | கோகீலாபà¯à®°à®¿à®¯à®¾
Name of a Raga
Boy/Male
Hindu
King of snake
Boy/Male
Latin Welsh
Excellent. Masculine equivalent of Emily, from the name Aemilia, the feminine form of the Roman...
Boy/Male
Muslim/Islamic
One who is served
Girl/Female
Tamil
Goddess Lakshmi
Boy/Male
Tamil
To search
Surname or Lastname
English (mainly Cheshire)
English (mainly Cheshire) : habitational name from a place in West Staffordshire named Whitehurst, probably from Old English hwīt ‘white’ + hyrst ‘wooded hill’.
Girl/Female
Australian, Danish, Finnish
Wind
LOADING COIL
LOADING COIL
LOADING COIL
LOADING COIL
LOADING COIL
n.
A little lord; a lordling; a lord, in contempt or ridicule.
n.
That which stands at the head; title; as, the heading of a paper.
a.
Buoyed upon or in a fluid; a, the floating timbers of a wreck; floating motes in the air.
n.
That which lades or constitutes a load or cargo; freight; burden; as, the lading of a ship.
n.
Floating threads. See Floating threads, above.
a.
Receiving its charge through the muzzle; as, a muzzle-loading rifle.
n.
The planking or boarding of a shaft, cofferdam, etc.
n.
Freight; loading; cargo.
n.
A coat or covering; a layer of any substance, as a cover or protection; as, the coating of a retort or vial.
a.
Not funded; not fixed, invested, or determined; as, floating capital; a floating debt.
n.
The act of loading.
p. pr. & vb. n.
of Load
n.
A place for landing, as from a ship, a carriage. etc.
n.
The beads or bead-forming quality of certain liquors; as, the beading of a brand of whisky.
n.
The act, or state, of inclining; inclination; tendency; as, a leaning towards Calvinism.
n.
A load; cargo; burden.
a.
Guiding; directing; controlling; foremost; as, a leading motive; a leading man; a leading example.
n.
The act of putting a load on or into.
a.
Free or lose from the usual attachment; as, the floating ribs in man and some other animals.