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Discussion in 'Electronic Design' started by [email protected], Aug 23, 2007.

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  1. Guest


    I'm trying to find a good online source of C-shaped Ferrites (im not
    sure whether thats there correct name sorry, ferrite is definatly what
    im after only in a C shape, gapped ring?)

    I would like to experiment with the gap of the ferrite so thats
    something im interested in finding on a supplier website.

    Any leads?


  2. Joerg

    Joerg Guest

    Just buy U cores. They often come in pairs, meaning you get two for one :)

    They sell small quantities and in the past my experience has been good:

    Make sure you buy the right material for the frequency range of your choice.
  3. Robert Baer

    Robert Baer Guest

    If you need a gap for a "C" (aka "U") shape, the only way is to use
    some thin tape, thin plastic or thin paper.
  4. Guest

  5. Eeyore

    Eeyore Guest

    C shapes ? Can't say I've met those.

    Get the online catalogues from Epcos, TDK and Ferroxcube. They should tell you
    pretty much what people today are actually using.

  6. Paul Mathews

    Paul Mathews Guest

    Gapped ferrite toroids are readily available, since they are used for
    a number current and magnetic field sensing applications and
    occasionally to build energy storing inductors. You may want to
    specify 'no fill material' in the gap. Or, you can make your own,
    using a tile-cutting saw or other diamond blade. The material is
    brittle, so support it well during cutting. It seems to me that the
    last time I had need, I got them from Elna:

    Paul Mathews
  7. Joerg

    Joerg Guest

    And don't try this on a tile cutting saw with a blade that was already
    used for a few hundred sqft of Italian porcelain. Speaking from
    experience here ...

    BTW, in the US the MadDog 225 blades are really good but a 7-1/4 incher
    will set you back almost 50 bucks. Worth it though.
  8. legg

    legg Guest

    This image is labelled 'iron core'. This is for a good reason, if you
    intend to experiment with electromagnets. A material with a high DC
    saturation flux density (ie not ferrite) allows for larger magnetic
    fields to be created in the gap.

    The structure is a tape-wound core that is cut after impregnation,
    but the same effect can be created using Uor I laminationsm as long
    as the only gap present in the circuit is where you want it.

    UI shapes start on page 62 here

    C cores and cut cores

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