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Inductance of choke core

Discussion in 'General Electronics Discussion' started by mspeedie, May 7, 2012.

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  1. mspeedie


    May 7, 2012

    I'm a first timer so if this question has been answered already or if I should be in a different section of this site, let me know.

    I am using snap-on choke core inductors at my DC motor to reduce EMI/RFI.
    Dimensions: 13mm x 25.2mm x 3.5mm ferrite core.
    Radio Shack product no. 273-0067.

    These work great as I no longer have interference on my circuit board. The choke cores are, however very large. I would like to find the inductance of these choke cores so I can compare smaller alternatives. Radio Shack doesn't list the inductance of this part. I've called them but nobody seems to know.

    Is there a way to determine the inductance based on the dimensions/material? I don't have a signal generator and was hoping to not have to purchase one. (Cash is tight).

    I'm running my wires straight through with no loops.

    Any insight is appreciated.

  2. davenn

    davenn Moderator

    Sep 5, 2009
    hi Mike
    welcome to the forums :)

    they dont have any inductance on their own, hence why radio shack doesnt list anything
    there is only inductance once a cable is passed through with one or multiple turns

    I have seen inductance calculators on the www where you put in the details of turns, wire size, etc and it works out the inductance for you.
    have a google searchand see what you can find :)
    you dont need a signal gene to find inductance, many multimeters have an inductance function :)

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