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Topic: Primary coil

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	Coil - Wikipedia, the free encyclopedia
		A boiler coil is an element in a water heater.
		A Oudin coil is a disruptive discharge coil.
		The RNA coil is a nucleic acid structure consisting of a string of covalently-bound nucleotides.
	en.wikipedia.org /wiki/Coil (1058 words)

	Induction Coil - LoveToKnow 1911
		Induction coils are employed for physiological purposes and also in connexion with telephones, but their great use at the present time is in connexion with the production of high frequency electric currents, for Röntgen ray work and wireless telegraphy.
		In this break the magnetization of the iron core by the primary current is made to attract an iron block fixed to the end of a spring, in such a way that two platinum points are separated and the primary circuit thus interrupted.
		A general description of the mode of constructing a modern induction coil, such as is used for wireless telegraphy or Röntgen ray apparatus, is as follows: The iron core consists of a bundle of soft iron wires inserted in the interior of an ebonite tube.
	www.1911encyclopedia.org /Induction_Coil (3693 words)

	Induction coil - Wikipedia, the free encyclopedia
		An induction coil or "spark coil" (archaically known as a Ruhmkorff coil) is a type of disruptive discharge coil.
		The term "Induction coil" is also used for a coil carrying high-frequency AC and intended to induce eddy currents to heat objects placed in the interior of the coil, such as in induction heating or zone melting.
		The induction coil was discovered during early experiments with electricity, probably by Nicholas Callan in 1836, and further refined by Heinrich Ruhmkorff.
	en.wikipedia.org /wiki/Induction_coil (473 words)

	- How it Works - (Site not responding. Last check: 2007-10-23)
		The primary winding is connected to a capacitor forming an LC circuit which oscillates at a given frequency determined by the formula f=1/2Pisqrt(LC).
		The field then begins to collapse and recharges the primary capacitor, this continues until all of the energy of the energy in the primary oscillate has decayed due to inductive coupling between the primary and the secondary, and resistive losses in the primary circuit.
		As the primary oscillations decay, the secondary is driven to higher and higher voltages due to resonance.
	www.glubco.com /weaponry/tesla/work.html (764 words)

	Nikola Tesla's Coil (Site not responding. Last check: 2007-10-23)
		The Tesla Coil consists of a vibrator or transformer (parts A and B in the Diagram), two (2) high-voltage capacitors (H), a primary (D), and a secondary (E) connected to a ball terminal or antenna (G).
		The secondary (or secondary coil) is a cone-shaped coil.
		The primary of this Tesla Coil consists of two thick insulated copper wires which are resonated by the capacitors to equal the natural resonant frequency of the secondary.
	old-mage.com /tech/Tesla.htm (1003 words)

	Tesla Coil (Site not responding. Last check: 2007-10-23)
		The inductance in the primary circuit is formed from several turns of large diameter copper wire, and the capacitance consists of a large capacitor.
		The capacitance in the secondary circuit is derived from the distributed capacitance of the coil.
		With the coil in operation, move the neon bulb along the length of the transformer to explore the field pattern near it.
	physicsnt.clemson.edu /physdemo/5/demos/Nteslac2.htm (1619 words)

	coil
		The tesla coil was developed by Dr. Nikola Tesla - the inventor of the technical alternating current - around the next to last turn of the century.
		The function of a tesla coil is quite simple: A high voltage transformer with an output voltage of at least 7500V and 20mA charges a high voltage capacitor.
		A high output voltage is reached, because the inductance of the secondary is enormous in relation to the primary coil inductance.
	www.hoelscher-hi.de /hendrik/english/coil.htm (1881 words)

	Square Tesla Coil
		In addition, the Q of the coils is very important (the Q of a coil is equal to its inductive reactance divided by its resistance).
		The coil was formed on four 6-position, twin-turnscrew type barrier blocks, which were mounted to the top of the enclosure near the edges, and bus wire was then connected to the barrier blocks to form the coil.
		Coils L1 and L2 help to limit the amount of high-voltage kickback introduced to the AC power line, and help to prevent the high voltage kickback from damaging the power transformer.
	www.uoguelph.ca /~antoon/circ/hv/sq-tesla/sq-tesla.html (3340 words)

	Tesla Coil Theory
		Essentially, the capacitor and tesla coil primary form one pair of tank circuts: when the spark gap arcs, the momentary short circut created dumps the capacitor's charge into the coil's primary.
		The "oudin" coil is a 1/2-wave variation on the tesla coil.
		The oudin primary sometimes is merely a pair of taps on the secondary (an autotransformer).
	www.uncletaz.com /library/scimath/tesla/teslacoilth.html (552 words)

	Primary (Site not responding. Last check: 2007-10-23)
		The primary coil generates a strong magnetic field that is coupled to the secondary coil.
		This magnetic field oscillates at the resonant frequency of the secondary coil.
		The coil is wound on a 30 degree angle.
	www2.netdoor.com /~mosaic/primary.htm (225 words)

	Tesla Coil Parts
		The secondary coils is what receives the resonating charge from the tank circuit (the primary coil, high voltage power supply, spark gap, and capacitor are all the components of the tank circuit).
		The primary coil is the the largest and probably the most dangerous part of the tesla coil.
		The shape and form of this coil is very important, although the coil may work with a bad primary coil it will loose much energy if the shape is deformed from a relative circular winding.
	home1.gte.net /~vze2qp7e/tc (892 words)

	Bizarre Tesla Coil
		Cement a disk in one end of the secondary coil with the head of the terminal screw inward and attach the coil to the screw.
		If both coils are made to the sizes suggested, about 20 feet of wire will be required for the primary coil and 500 feet for the secondary coil.
		After the primary coil is completed and the frame assembled, slip the secondary coil through the holes in the ends of the frame, centering it so it projects equally from each end of the primary coil.
	bizarrelabs.com /ind2.htm (2023 words)

	Solid-State Tesla Coil
		The Tesla Coil is ideal for demonstrating and exploring the unusual phenomena that occur with high-frequency high-voltage energy.
		The simplest method is to tap the primary coil on every turn and select the tap that produces the greatest voltage at the hot end of L2.
		The coil discharge is most dramatic in a darkened room, and you should be able to light a fluorescent lamp at a distance of about two feet from the secondary coil.
	www.uoguelph.ca /~antoon/circ/hv/ss-tesla/ss-tesla.html (2156 words)

	transformer
		In many transformers the coils are wound on a core made of a material with high magnetic permeability; this intensifies the magnetic field induced by the current in the primary, increasing the transformer's efficiency.
		Neglecting power losses (which are made small by careful design), the ratio of primary voltage to secondary voltage is the same as the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.
		The primary and secondary currents are in inverse proportion to the number of turns in the coils.
	www.factmonster.com /id/A0849269 (388 words)

	Induction Coil
		The original induction coil was invented in 1836 by Nicholas Callan (1799-1864), a priest and the professor of natural philosophy at St.
		The primary coil is made of copper tape, wound around a core of iron wires.
		Although he did not invent the induction coil, his name is often associated with it (particularly in Europe) because he successfully put together all of the elements of the coil, including the use of the condenser connected across the primary to moderate the back EMF of the collapsing magnetic field of the secondary.
	physics.kenyon.edu /EarlyApparatus/Electricity/Induction_Coil/Induction_Coil.html (1277 words)

	PowerLabs Twin Tesla Coil!
		Both coils wound and varnished, with their copper ground straps on place (not really visible due to poor lighting on the picture) and their space-wound top inch, which will be used for further distancing the toroid from the strike rail.
		For the final version of the twin coil a synchronous rotary spark gap is being assembled, which will allow the tank capacitance to be increased and will provide the maximum possible efficiency.
		When I first ran this coil I had my computer and stereo system both on and they were unaffected except for some crackling sounds on the computer's speakers (but not on the stereo) as the main gap fired.
	www.powerlabs.org /coil2.htm (2823 words)

	Tesla Primary Coil (Site not responding. Last check: 2007-10-23)
		My primary is made of 1/4" refrigerator tubing obtained from a home center.
		The base of the primary is cut from a sheet of 1/4" Lexan (Polycarbonate).
		The coil is held in comb like strips of polyethelene cutting board.
	home.austin.rr.com /teslafun/Primary_coil.htm (252 words)

	Tesla coil operation
		In contrast, a Tesla Coil uses a relatively loose coupling between primary and secondary, and the majority of the voltage gain is due to resonance rather than the turns ratio.
		The resonant frequency of the primary circuit is deliberately chosen to be the same as the resonant frequency of the secondary circuit so that the secondary is excited by the oscillating magnetic field of the primary.
		Energy is gradually transferred from the primary resonant circuit to the secondary resonant circuit.
	www.richieburnett.co.uk /operation.html (1756 words)

	Bizarre induction Coil
		The vibrator is a flat, steel spring mounted at one end of the core of the coil in such a position that when the core is magnetized by a current flowing through the primary coil, one end of the vibrator is attracted to the core.
		Therefore, when current flows from the battery through the contact screw, vibrator, primary coil, and then back to the battery, the core is magnetized and attracts the vibrator spring to it.
		The primary consists of two layers of No. 16 gage enameled copper wire wound for a length of 7 inches over the core, with one layer of heavy waxed paper between the layers of wire.
	bizarrelabs.com /ind1.htm (4077 words)

	Building a Mini Coil
		The primary coil consists of 12 turns of 18swg tinned copper wire, wound as a flat or Archimedes spiral.
		The coil is supported using four strips of the same perf-board as used for the Spark Gap.
		The basic method is to adjust the conections to the primary coil, in order to adjust its inductance, and hence the resonant frequency of the primary circuit comprising the high voltage or tank capacitor and the primary coil.
	www.g8cyerichmond.freeserve.co.uk /building.htm (1893 words)

	Oudin Coil (Site not responding. Last check: 2007-10-23)
		The Oudin coil is similar in some resspects to the Tesla Coil, in that it is an air-cored resonant RF trasnformer.
		The primary and secondary form one continuous winding so that the circuit is really a resonant autotransformer.
		In the Oudin coil the secondary coil together with the topload is resonant at the same frequency as the primary.
	www.g8cyerichmond.freeserve.co.uk /oudincoil.htm (225 words)

	Ignition Coil Simulation (Site not responding. Last check: 2007-10-23)
		The inputs are beginning and ending RPM, RPM step, dwell angle in crankshaft degrees, resistance of primary ignition coil circuit in ohms, inductance of igntion coil primary in millihenries, battery voltage, and capacitance of ignition coil secondary in picofarads.
		This model assumes 100% energy transfer from primary circuit to secondary circuit, which will not be the case in the real world - expect 70-85%.
		You can jack up the dwell angle, which will allow more time for the coil to charge, but then the peak primary current rises at lower RPM, and the more current the more heat generated in the coil, which is not good either (generically, coils like 10 amps or less).
	www.bgsoflex.com /igncoil.html (206 words)

	PowerLabs! Mini Tesla Coil!
		The coil form is acrylic (from a microwave oven door!), which is a real pain to work with.
		The primary remains the same size, but the primary conductor is increased in thickness.
		The primary coil form is now made of polypropylene, for it's reduced brittleness (the last coil form cracked) and RF losses and the new secondary is acrylic (not ideal, but certainly better than my next option: PVC).
	www.powerlabs.org /minitc.htm (1148 words)

	Homeglossary.com - The World's Most Complete Real Estate Directory
		Within a metropolitan area with a population of one million or more, there may be areas that would qualify as metropolitan areas on their own, yet are linked to other cities in close proximity.
		First in importance; a primary person; a head or chief of something.
		Primary residence of an individual; the place where a person lives most of the time.
	www.yourwebassistant.net /glossary/p18.htm (874 words)

	Re: Does the coil in the primary coil of a transformer loses some current when
		In an ideal transformer, meaning one that does not exhibit any losses, the current in the primary coil is exactly equal to the current in the secondary coil multiplied by the turns ratio of secondary to primary.
		The turns ratio of secondary to primary is 0.1, so if the secondary coil draws 1 Ampere, the primary will draw only 0.1 Amperes.
		This means that only 5% of the power supplied to the primary is lost and not transferred to the secondary.
	www.madsci.org /posts/archives/2000-10/972867215.Eg.r.html (409 words)

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