Coil Inductor
Nov/090
Coil Inductor
Electric Equipment, Tools, Meters
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 50PHILIPS 33uH SC15 Power RF Choke Coil Axial Inductor  US $11.99
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 OLD SCHOOL TOROID INDUCTOR COIL FILTER TESLA EGG EXP US $19.99
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 150 MH AUDIO INDUCTOR CHOKE COIL FORM FILTER QTY 20 US $.99
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 10x power inductor coil 10uH 21A THT radial 10u US $.99
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 5x power inductor coil 47uH 2A SMD 47u SB1260 470 US $.99
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 500 pcs MST Components 33 uH 64 A SMD Coil Inductor US $35.99
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 6 MAGNETIC TRANSDUCER MAGNETIC PROBE COIL INDUCTOR US $34.95
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 2 pc Coil Choke Inductor 622LY 820K Toko 82uH US $3.50
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 2 pc Coil Choke Inductor 622LY 331K Toko 330uH US $3.50
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 Slug Tuned Adjustable RF Coil Inductor Assembly US $7.95
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 500 pcs MST Components 10 uH 38 A SMD Coil Inductor US $59.99
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 LOT 80 MINI INDUCTOR CHOKE COPPER WIRE COIL FREE SHI US $99.99
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 Three Slug Tuned Adjustable RF Coil Inductors US $6.95
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 LOT 160 CHOKE INDUCTOR MINI COIL COPPER WIRE FREE SHIP US $99.99
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 0603 smd inductor kit 41valuesX48pcs chip coil pack box US $220.00
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 0402 smd inductor kit 35valuesX48pcs chip coil pack box US $220.00
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 40uH Coil Copper WireWrap Toroid Inductor 6017 4ROMBCF US $6.19
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 0603 smd inductor kit 33valuesX96pcs chip coil pack box US $105.00
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 0402 smd inductor kit 42valuesX96pcs chip coil pack box US $100.00
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 20 MINI 82MH INDUCTOR COILS50MANIS00410 INDUCTORS US $9.95
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 50PHILIPS 22uH SC15 Power RF Choke Coil Axial Inductor US $11.99
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 NEW 500X Cooper UP2T 330 33UH Unshield Coil Inductors US $14.95
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 NEW 500X Cooper UP2T 150 15UH Unshield Coil Inductors US $14.95
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 10 FEC0114 INDUCTOR COILS VERSATILE PROGRAMMABLE US $9.95
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 RFC 06 mHy RADIO FREQUENCY CHOKE COIL INDUCTOR 2 SEC US $12.00
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 25 SMALL 100UH INDUCTOR COILS SMT SMD US $9.95
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 RFC 07 mHy RADIO FREQUENCY CHOKE COIL INDUCTOR US $10.00
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 RFC 10 mHy RADIO FREQUENCY CHOKE COIL INDUCTOR US $12.00
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 25 B4005 WIDEBAND RF TRANSFORMERS INDUCTOR PAIRS COILS US $13.95
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 TDK SMD INDUCTORS COILS RLF12545T 100M5R1 PFCHN US $55.00
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 LOT 65 COPPER WIRE WRAP COIL INDUCTOR CHOKE FREE SHIP US $99.99
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 LOT 50 INDUCTOR CHOKE COPPER WIRE WRAP COIL FREE SHIP US $99.99
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 LOT 100 INDUCTOR CHOKE MINI COIL COPPER WIRE FREE SHIP US $99.99
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 TDK RLF12545T 100M5R1 PFCHN SMD INDUCTORS COILS US $55.00
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 VINTAGE vacuum tube radio am LOOP inductor antenna coil US $15.00
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Testing coil is very easy compares to checking three leads components such as SCR, FET and etc. In general, a coil consists of many turns or wire wrapped around a common core. The core could be made of iron or even air. When an electric current passes through the coil, a magnetic field is produced. A coil in some respect s acts just opposite a capacitor. A capacitor blocks DC while allowing AC to flow through it; a coil allows DC to flow through it while restricting AC current flow. Another name for a coil is an inductor.
Coil or inductor can be test using an analog, inductance or a coil meter such as the dick smith flyback tester. A coil that is small in size, I would usually just test it with analog meter and you could check it on board too. Set your analog meter to X1 ohm and place the probes across the small coil. The meter should show some reading (or continuity) and this proved that the coil winding is okay. Small coils seldom spoilt because it have less winding compares to big coils where it could have many turns of winding and chances for it to go shorted is very high.
Testing bigger coil or inductor such as the computer monitor B+ coil, you need an inductance meter to find out the exact inductance value which is in the unit of henry (h). From experienced using an inductance meter to check coils to see if it good or bad is not recommended because a shorted coil (shorted between winding) could have a good inductance value and you would miss out checking a bad coil. Unless you want to use the inductance meter to calculate the reading and do rewinding, looping and etc on that coil. I would only test a big coil with dick smith flyback meter. Any shorted winding in it could be easily detected by this meter.
Now is the time to share my true case example- a computer dealer send me a monitor for repair with power blink symptom. Usually I do not straight away repair the monitor but I would first use the flyback tester to scan all the major coils (smps, flyback, b+ coil and horizontal deflection coil) before using my digital or analog meter to do testing. When measuring the B+ coil, the Led lights went off and it suppose to show at least 5 LED bars and above. Upon soldering out the coil, I did not see any burn mark at the winding or loop and in fact it looks shiny. Because I trust the meter, I opened up the winding and to my surprised the internal winding had burnt into crisp but the outer winding looks good indeed! A new B+ coil restored the monitor to life.
By using a flyback tester for testing coil, it has helped me to locate many shorted coils in switch mode power transformer primary winding, B+ coil, flyback transformer primary winding and horizontal deflection coil. The flyback meter can even be used to check the condition of ballast in fluorescent lamp too!
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LCD and Electronic Repairs are very Easy for everyone and Highly Profitable too. You can learn all the secrets easily.
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Learn Electronic Component Testing.
Article Source: ArticlesBase.com - Testing Coil - 3 Simple Methods To Accurately Test Any Coils Or Inductor
Coiled Power Inductor combines compact package, efficiency.
Supplied in 2.5 x 2.0 x 1.2 mm package, coiled power inductor is intended for personal electronics such as cell/smart phones and digital cameras. Its low-resistance coils, dense flat power lines, and metallic magnetic materials resist magnetic saturation and can be used for direct currents. Featuring inductance value of 10 µH, product also exhibits minimal audible noise due to combination of ...