How To Test an Inductor to find it value

Michael8it
Michael8it Posts: 192
edited October 2011 in Vintage Speakers
I reassembled my 12B crossovers from 3 different ones that had parts missing. I did not think to label the Inductors that I took off (the large ones from the bottom of the x-over). I tested both with an ohm meter and one read 6.5 ohms, the other 13.5. I am assuming the larger coil, with more wire, is the 13.5 ohm Inductor.

Is there a way to test an inductor to tell what it is? Sorry, I was an electronics technician but that was a long long time ago........
Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
Post edited by Michael8it on
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  • Mr. Bubbles
    Mr. Bubbles Posts: 736
    edited October 2011
    The most accurate way would be using a network analyzer. You can also build a fairly simple L-C tester, and or find a multimeter that has this feature. I think Fluke has some as well as some other Multi-meter manufacturers. Some one on the forums here may be able to point you to which of the coils goes where in your circuit from their experience with the same circuit. Good luck.
    If con is the opposite of pro, is Congress the opposite of Progress?!


    Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium.
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  • Face
    Face Posts: 14,340
    edited October 2011
    LCR meter.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • inspiredsports
    inspiredsports Posts: 5,501
    edited October 2011
    Face wrote: »
    LCR meter.

    Any particular brands/price points you've had good luck with?
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  • Joe08867
    Joe08867 Posts: 3,919
    edited October 2011
    Fluke, I have seen them for about 150 on the web. I borrowed a buddies and it worked well.
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  • Michael8it
    Michael8it Posts: 192
    edited October 2011
    That's a bit rich for me to test two inductors...... Maybe I can find a local Electronics shop that can check them for me.
    Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
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  • Face
    Face Posts: 14,340
    edited October 2011
    inspiredsports wrote: »
    Any particular brands/price points you've had good luck with?
    I use a Craftsman, it works ok. Fluke would be a better choice.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • Joe08867
    Joe08867 Posts: 3,919
    edited October 2011
    Michael8it wrote: »
    That's a bit rich for me to test two inductors...... Maybe I can find a local Electronics shop that can check them for me.

    That's why I borrowed a buddies. I am sure an electronics repair place would check them out for a nominal fee.
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  • mhardy6647
    mhardy6647 Posts: 33,804
    edited October 2011
    Remember that two parameters are important, the inductance and the DC resistance.
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  • MNmike
    MNmike Posts: 41
    edited October 2011
    yes there is the AC and DC values.

    Find a repair shop, must them dudes are willing to help.
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