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Topic: Microfarads

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	Learn Electronics Lessons and Information Pages
		Most plastic film types (Figure1) have printed values and are normally in microfarads or if the symbol is n, nanofarads.
		The unit is picofarads and the third number is a multiplier.
		A capacitor coded 474K63 means 47 × 10000 pF which is equivalent to 470000 pF or 0.47 microfarads.
	www.twysted-pair.com /capidcds.htm (148 words)

	Automotive collision avoidance and/or air bag deployment radar - Patent # 4673937 - PatentGenius
		The opposite side of resistor R90 is connected to one side of capacitor C63 of 0.01 microfarads and to one side of capacitor C66 of 1 microfarad.
		The opposite side of resistor R145 is connected to one side of capacitor C101 of 0.01 microfarads and to one side of capacitor C104 of 1 microfarad.
		The opposite side of the resistor R228 is tied to one side of a capacitor C163 of 0.02 microfarads, signal H and to one side of a resistor R268 of 150K ohms.
	www.patentgenius.com /patent/4673937.html (21880 words)

	Capacitor Coding (Site not responding. Last check: 2007-10-29)
		These codes can easily be deciphered into a standard value in microfarads.
		If desired, that value can now be converted to microfarads by moving the decimal point six places to the left.
		Values greater than 1 microfarad are also coded this way.
	staff.bcc.edu /eet/Capacitor_Coding.html (223 words)

	Malvino Inc - Can You Solve This
		Half-wave Rectifier: A half-wave rectifier with a capacitor-input filter is driven by a secondary winding with a Thevenin voltage of 20 VAC and a Thevenin resistance of 40 ohms.
		Full-wave Rectifier: A full-wave rectifier with a capacitor-input filter is driven by a secondary winding with a Thevenin voltage of 20 VAC and a Thevenin resistance of 40 ohms.
		Bridge Rectifier: A bridge rectifier with a capacitor-input filter is driven by a secondary winding with a Thevenin voltage of 20 VAC and a Thevenin resistance of 40 ohms.
	www.malvino.com /cansolve/questions3.html (706 words)

	Article on capacitors by Toni McConnel
		The ZA series has impedance characteristics as low as one-third that of conventional low-impedance aluminum capacitors at 100 kHz, 20 degrees C. The series is suited for use in many applications in which solid electrolytic capacitor technology has been the preferred choice, according to Rubycon.
		The caps have rated voltages of 6.3 to 35 V, a capacitance range of 4.7 to 1,000 microfarads, an operating-temperature range of -40 to +105 degrees C, and a load life of 1,000 to 2,000 hours at +105 degrees C. Case sizes are available from 4 x 7 mm to 10 x 16 mm.
		Rated voltages are 6.3 to 50 V, with a capacitance range of 22 to 6,800 microfarads, operating-temperature range of -40 degrees C to +105 degrees C and load life of 2,000 to 5,000 hours at +105 degrees C. Applications for the ZL series include output-filtering circuits for switching power supplies, dc/dc converters and boards.
	www.tonimcconnel.com /caparticle.htm (725 words)

	Math 346 (Site not responding. Last check: 2007-10-29)
		We conclude that the mean capacitance of all Lectrimax capacitors is less than 0.33 microfarads when the mean capacitance of all Lectrimax capacitors actually is greater than or equal to 0.33 microfarads.
		We conclude that the mean capacitance of all Lectrimax capacitors is greater than or equal to 0.33 microfarads when the mean capacitance of all Lectrimax capacitors actually is greater than or equal to 0.33 microfarads.
		We conclude that the mean capacitance of all Lectrimax capacitors is less than 0.33 microfarads when the mean capacitance of all Lectrimax capacitors actually is less than 0.33 microfarads.
	www.elmhurst.edu /~allenr/Courses/M346/q9.htm (289 words)

	SINGLE to 3 PHASE CONVERTER
		The microfarad rating should be chosen by the horsepower rating of the idler motor.
		A set may be needed because if more than about 50 microfarads are needed, two or more separate capacitors must be connected in parallel to obtain the desired value.
		This idler was best balanced with 80 microfarads between lines 1-3 and 60 microfarads between lines 2-3, although 70 microfarads between each was only slightly worse.
	www.metalwebnews.com /howto/ph-conv/ph-conv.html (3326 words)

	Capacitors (Site not responding. Last check: 2007-10-29)
		Capacitors are measured in farads, but a farad is a huge value compared to what is needed in a typcial music amplifier or similar circuit.
		So caps are usually measured in microfarads (millionths of a farad) or picofarads (trillionths of a farad).
		Microfarads are usually denoted by the Greek letter mu, or often just a "u".
	www.netads.com /~meo/Guitar/Tubes/Basic/caps.html (488 words)

	Electrolytic capacitor value - Wikipedia, the free encyclopedia
		The basic unit of capacitance is a farad, however this unit is often too large for practical uses, so microfarad and picofarad are more commonly used.
		Once again, values were generally in microfarads (µF) and could be multiplied by any power of ten to achieve values such as 8, 10, 15, 20, 30, 50, 100, and so forth.
		In around 1970, a standardized set of capacitor base numbers was devised so that the value of any modern electrolytic capacitor could be derived from multiplying one of the modern conventional base numbers 1.0, 1.5, 2.2, 3.3, 4.7 or 6.8 by a power of ten.
	en.wikipedia.org /wiki/Electrolytic_capacitor_value (677 words)

	Compatibility
		For other parts, there is a trade-off between the component's electrical characteristics and its voltage rating for a given package size.
		For the same package but with a 35 volt rating, the highest capacitance generally available is 10 microfarads.
		The circuit works nicely with 100 microfarads but flickers badly with 10 microfarads in some cases.
	www.richmondcontrols.com /compati.html (369 words)

	Capacitor
		Most capacitors have printed values and are normally in microfarads or if the symbol is n, nanofarads.
		The unit is picofarads and the third number (4) is a multiplier.
		So we have 47 followed by (4) zeros.That means 47 × 10000 pF which is equivalent to 470000 pF or 0.47 microfarads.
	library.thinkquest.org /C006657/electronics/capacitor.htm (838 words)

	Magnan Audio Cables Web Site - Tweaks: Do-it yourself approach to AC line filtering
		A moderate initial filter configuration could consist of 50 microfarads total (AC to neutral) at the system outlet, another 50 microfarads total (AC to neutral) distributed around the house, and 300 microfarads total (neutral to earth ground) distributed around the house.
		Four 10 microfarad 400-600 volts DC metallized polypropylene film caps, connected in parallel and bypassed by at least one.47 microfarad and one.01 microfarad 400-600 volts metallized polypropylene cap.
		Recommended for each neutral to earth ground plug-in adaptor: one 100-220 microfarad, one 10 microfarad, and one 0.47 microfarad metallized polypropylene film cap, connected in parallel (all caps 100 VDC or greater, no resistor needed).
	www.magnan.com /pages/tweaks/doityourself.html (967 words)

	OSP Magazine - Home
		Most telephone cables are manufactured to an average capacitance to.083 microfarads per mile.
		If the open meter is set to.083 microfarads per mile and the open meter shows 1200 feet to the open cable pair and the cable capacitance is.076 microfarads per mile, then the open would be at 1,300 feet.
		The exact capacitance of any cable can be determined by calibrating the open meter to the exact capacitance of that particular cable, and establishing a data base for use in the future.
	www.ospmag.com /issues/article/?articleid=00000438 (1156 words)

	SINGLE to 3 PHASE CONVERTER
		The microfarad rating should be chosen by the horsepower rating of the idler motor.
		For guidance or if perfect balancing of the currents is not needed, the microfarad rating can be estimated by the horsepower rating of the idler motor.
		Inside one commercial 2 horsepower rotary phase converter was two 30 microfarad capacitors in parallel, this is effectively 60 microfarads.
	members.cox.net /rdoctors/ph-conv.html (3469 words)

	TESLA MATH FORMULARY
		The Impedence of the primary capacitor should match the Impedence of the transformer at 60 Hz (60 Hz is the AC cycle rate of common household wall sockets, at least in America).
		To match Impedence and determine capacitor value: 1 C = ------------------- 2 x pi x Z x.00006 C = capacitance in microfarads needed for primary capacitor.
		To determine Reactance of capacitor: 1 X(C) = --------------- 2 x pi x C x F X(C) = capacitor Reactance C = Capacitor value in microfarads, from equation 2) F = Frequency in Mhz (megahertz) pi = 3.141592654 Note: To convert kilohertz to megahertz simply divide by 1000.
	www.pupman.com /listarchives/1995/august/msg00039.html (997 words)

	Power Climber September '02 Newsletter (Site not responding. Last check: 2007-10-29)
		We use capacitors that are measured in microfarads (µf or µF).
		A microfarad is a millionth of a farad.
		Run capacitors are rated within the range of 3-70 microfarads.
	www.powerclimber.com /newsletters/sep02.html (859 words)

	Passive Crossovers
		This demo shows how the crossover point shifts when a 47 microfarad capacitor is used with different speaker loads.
		This diagram shows the rolloff characteristics of 3 different passive crossovers each of which consist of a single coil (of different values) creating the rolloff.
		The output level of a 4 ohm speaker with a 33 microfarad capacitor in series with it, would follow (approximately) the red line.
	www.bcae1.com /passxovr.htm (1223 words)

	Radio Daze-Capacitors-Orange Drop 715P series-Film
		Insulation Resistance: At +25°C: 400,000 Megohm for C <.5 Microfarads
		At +85°C: 20,000 Megohm for C <.5 Microfarads
		At +105°C: 2,000 Megohm for C <.5 Microfarads
	www.radiodaze.com /capsOD-715P.htm (165 words)

	Queries
		If it is a capacitor, my understanding is that the stripes are code for a capacitor rating of 2200 picofarads, or 0.0022 microfarads.
		This is much less than the 0.47 microfarads that appears to be printed on the external capacitor (or suppressor) pictured at this site's
		Passing continuity tests are (1) the top wire of the part and terminal T1 tachometer input; and (2) the bottom wire of the part and terminal T2 primary winding of the ignition coil input.
	home.earthlink.net /~honda.lioness/id8.html (336 words)

	Music From Outer Space Resistor Calculator
		Capacitors are usually measured in microfarads abbreviated uF (1 µF =.000001 Farad) and picofarads, abbreviated pF (1 pF =.000000000001 F).
		This is the schematic symbol for a polarized capacitor.
		The capacitance of these types ranges from a few microfarads up to a farad (or larger).
	www.musicfromouterspace.com /ElectronicTools/CapacitorChart.html (616 words)

	Solid State Power Supply for Tube Amplifier. (Site not responding. Last check: 2007-10-29)
		The capacitors in parallel with the diodes are 0.1 microfarad 500 volt ceramic discs.
		The first filters (forming the doubler circuit) are each 200 volt 100 microfarads.
		The first main filter capacitor just before the choke is 20 microfarads at 450 volts, the one after the choke is 100 microfarads at 450 volts, and the one after the resistor, which is 40 ohms at 20 watts, is 250 microfarads at 450 volts.
	members.tripod.com /~gabevee/sspssche.html (184 words)

	Interface of 120 and 270 VDC Converters
		This means that the converter operates when the pin is open and is inhibited when the pin is connected to the return.
		The inhibit pin has a twelve volt zener diode and 0.1 microfarad capacitor connected from the inhibit pin to the converter common circuitry.
		The inhibit pin does not pose a danger to leakage around the EMI filter, since it is in a high impedance mode when the Converter is operating.
	www.mdipower.com /content/ApplicationNotes/html/interface.htm (1383 words)

	Method
		The closed SCR output can either go directly to the flash unit to set it off instantly or it can go to the delay circuit.
		The delay circuit uses a 556 timer chip and a number of other components to create a delay in seconds equal to the capacitance of the "controlling capacitor" in microfarads.
		To get microfarads, you divide that by 1,000,000.
	courses.ncssm.edu /hsi/class2001/blythe/method.html (609 words)

	PS Audio - Stereo Products - High Current Power Supply - HCPS More Info
		In fact, the size of the transformer in the HCPS is larger than many small power amplifiers and the energy storage is immense: 75,000 microfarads to be precise.
		Using 75,000 microfarads of capacitance coupled to a giant transformer provides unspeakably low impedance to the preamplifier.
		The power produced by the supply is then routed to high end Neutrik connectors on the back of the HCPS and fed to your PCA-2 preamplifier via the supplied multi-shielded 2 meter cables.
	www.psaudio.com /products/hcps_overview.asp (1152 words)

	Mark III User's Guide
		This table shows the correspondence between the markings and the capacitor value in microfarads.
		Use the first two digits of the code and multiply them by 10 to the power indicated by the third digit.
		This table shows the correspondence between the markings and the capacitor value in picofarads, nanofarads, and microfarads.
	www.junun.org /MarkIII/Manual/Appendix.jsp (1680 words)

	Michelle and Neil's Homepage - Amateur Radio Capacitor Guide
		The term " milliFarad " is not generally used, but IS a valid way of expressing a value; 1 milliFarad = 1 thousand microFarads, and so the smoothing capacitor in a typical power supply could be 10,000 microFarads or 10 milliFarads.
		Back in the early part of the century, capacitors were marked in values expressed in microFarads eg 0.047 uF (47 nanoFarads) and some of the smaller values such as 470 picoFarads would have been marked 470 uuF.
		Nowadays the trend is for markings in picoFarads using a code similar to the code used for resistors, but with digits rather than colours.
	www.btinternet.com /~neil.farley/Amateur/Temp/capacitor.htm (412 words)

	diyAudio Forums - Capacitors
		The basic unit of capacitance is the Farad, named after Michael Faraday.
		Microfarads and picofarads are the most common designators, with nanofarads coming in third.
		To get a whole Farad in one place (at least at anything over 12V) takes a fair hunk of change, so you won't be seeing a lot of schematics specifying capacitance in Farads.
	www.diyaudio.com /forums/showthread.php?postid=4027 (221 words)

	Steelman Industries - Capacitors & Converters
		Capacitor cells are rated in microfarad and voltage.
		The easiest way to test a cell is to measure the microfarads with a meter.
		The microfarads should be equal to the microfarad rating or up to 5% over the rating.
	www.capacitorconvertors.com /howtotest.html (197 words)

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