Coil Inductor
Nov/090
Coil Inductor
Electric Equipment, Tools, Meters
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 0402 smd inductor kit 42valuesX96pcs chip coil pack box  US $100.00
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 Vintage JW MILLER inductor LOOPSTICK coil radio antenna US $20.00
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 VINTAGE vacuum tube radio am LOOP inductor antenna coil US $15.00
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 RTTY amateur ham radio coil shortwave antenna inductor US $28.00
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 Variable Inductor Coils 45μH 100μH Litz Wire 5 lot US $1.99
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 0603 smd inductor kit 33valuesX96pcs chip coil pack box US $105.00
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 Variable Inductor Coils 101μH 225μH Shielded 5 lot US $1.99
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 Variable Inductor Coils 306μH 680μH Litz Wire 5 lot US $3.99
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 20 84 MH INDUCTOR COILS 8mH81 OHMMAGNETIC METALS US $12.95
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 Variable Inductor Coils 17μH 37μH Shielded 5 lot US $1.00
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 4 VITEC 55P9102 100uH 100 uH 25A Toroid inductor coil US $4.00
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 Variable Inductor Coils Shielded code 103 5 lot US $1.99
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 Variable Inductor Coils Shielded code 207A 5 lot US $1.99
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 1000uh 5 INDUCTOR COIL BY NYT WEE LOT 25 PIECES US $9.95
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 NOS TELETYPE INDUCTOR COIL 401075 US $9.95
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 Motorized variable inductor coil Radio HF Rotary US $129.99
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 033 uH CHOKE INDUCTOR COIL NEW NOS LOT OF 100 US $7.50
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 2x Air coil filtering inductor for SS power amplifier US $2.99
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 COIL CRAFT DS1608C 222C INDUCTORS 1 Reel 286 pcs US $100.00
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 Coil Tronics INDUCTOR TRANSFORMER 768UH SMD VP5 1200 US $4.99
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 SMD power inductor 10Pcs 150uH 220uH SMT coil Sagami US $6.80
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 SMD power inductor 10Pcs 47uH 68uH 100uH SMT coil Sagam US $6.80
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 New 100 Capacitors CS2534 Radia Toroids Coils Inductors US $48.88
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 10 FEC0114 INDUCTOR COILS VERSATILE PROGRAMMABLE US $9.95
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 50PHILIPS 33uH SC15 Power RF Choke Coil Axial Inductor US $11.99
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 50PHILIPS 22uH SC15 Power RF Choke Coil Axial Inductor US $11.99
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 25 SMALL 100UH INDUCTOR COILS SMT SMD US $9.95
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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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 015uH VHF adjustable coil inductor shielded x5 pcs US $4.95
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 Coil Craft Power inductor power chokes copper 147pcs US $250.00
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 NEW LAM 715 001355 001 COIL INDUCTOR INTEL 233208381 US $49.99
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 COIL INDUCTOR RAYTHEON PART 328423 2 US $8.95
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 I100 I 100mm Ferrite Core bar inductor coil HF AL7100 US $20.00
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 COILCRAFT 0805HT 4N7T JBC INDUCTOR COIL SMD MOUNT TR US $9.90
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 BOURNS CM453232 R33M INDUCTOR COIL SMD MOUNT TR US $9.90
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 Bridgeport Boss 10 CNC Inductor Coil and Relay US $99.00
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 CAL COIL 3235 001 6P FERRITE INDUCTOR COIL SMD MOUNT US $9.90
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 50A324NFT12 25 B Cooper Coil Inductors miao US $11.90
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 20A324NFT12 25 B Cooper Coil Inductors US $9.99
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 25 B4005 WIDEBAND RF TRANSFORMERS INDUCTOR PAIRS COILS US $13.95
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 40uH Coil Copper WireWrap Toroid Inductor 6017 4ROMBCF US $6.19
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 COIL CRAFT DS1608C 103 INDUCTOR 10UH 1A 20 750 pcs US $500.00
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 Slug Tuned Adjustable RF Coil Inductor Assembly US $7.95
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 LOT 25 Pieces NYT WEE 220uh 5 INDUCTOR RF CHOKE COIL US $9.95
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 TOKO AMERICAN 369SNS 1650Z Variable Coil Inductor 22uH US $5.00
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 Lot of 50 muRata Chip Coil Inductor 30nH 270mA US $1.00
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 Lot of 50 Toko Chip Coil Inductor 18nH 5 US $1.00
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 Lot of 50 muRata Chip Coil Inductor 43nH 750mA US $1.00
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 Lot of 50 muRata Chip Coil Inductor 82nH 540mA US $1.00
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 Dale IH 3 Coil Inductor 100uh NEW US $4.95
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 COIL CRAFT DO3316P 103 FERRITE INDUCTOR COIL SMD MOUNT US $12.90
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 0603 smd inductor kit 41valuesX48pcs chip coil pack box US $220.00
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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.
Find out How to Repair A LCD Monitor - Find out the Secrets!
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 ...