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Ferrite UU cores - where to get?

Discussion in 'Electronic Design' started by Joseph Casey, May 20, 2005.

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  1. Joseph Casey

    Joseph Casey Guest

    Greetings.
    I need Qty 5 UU cores the type used in HT generators for CRTs. I have
    had no luck finding them in catalogs of local distributors. I am in
    Ireland so a European and preferably UK supplier is what I need.

    The size is aproximately 33 mm inside; 55 mm outside giving a diameter
    of ~12mm for each of the two core "legs".

    I don't know the exact ferrite type except they are to make a 2KV step
    up transformer. I succesfully used cores from old TVs before, but the
    modern ones are all potted so I can't use them.

    I would be very grateful if somebody could point me to a supplier.
    Regards
    Joseph Casey.
     
  2. Joerg

    Joerg Guest

  3. Guest

    Try Farnell - they list a bunch of Ferrocube E-cores as "Ferrite
    Components" in the transformer section of their catalogue.
     
  4. If you have some of those potted units with about the right sized
    cores, you might try baking them to destroy the potting compound. The
    cores are quite heat resistant. The biggest risk is that the potting
    will swell and crack the cores. But I have retrieved a few, this
    way.An outdoor gas grill works pretty well, while letting the toxic
    fumes blow away.
     
  5. Joerg

    Joerg Guest

  6. Ban

    Ban Guest

  7. Joseph Casey

    Joseph Casey Guest

    Thanks for suggestions and I will try those suppliers. I should clarify
    that ferrites in general are easy enough to get. My difficulty is
    finding UU cores of the type used in HT transformers. Listings of UU
    cores I have found seem to be rectangular cross section whereas those
    intended for HT have round section to facilitate the construction of the
    HT winding. I suspect these there is very limited demand for these items
    outside China or whereever our TVs are made these days. As a possible
    alternative approach does anyone know a manufacturer building high
    voltage equipment? I could beg some!
    With thanks
    JC
     
  8. I wouldn't be so quick to judge. A few years ago, when I was still living
    in Bloomington, Minnesota, USA, there was an Irish soccer team in town,
    and the team captain, Seamus, it seems, had been hired to coach American
    kids. I met him at the beer bar of a bowling alley where people went to
    drink beer and shoot darts. The most notable thing I remember about these
    Irish guys was the quip, "If you can't shoot darts when you're drunk, you
    can't shoot darts."

    But the point of my little tirade here is that ordinary Irish people
    didn't impress me as hating British people, or anyone else, for that
    matter. Seamus, upon some pressing, described to me his impressions of the
    situation in Northern Ireland, which seems to be divided between those who
    want to be a colony of England and those who want to be an independent
    Republic. Probably not coincidentally, there was a very strong correlation
    along religious lines. I kind of let it go at that point, because I try to
    avoid relegious controversy, unless, of course, I'm plugging my own, the
    Church of the Neodruid. ;-)
     
  9. Joseph Casey

    Joseph Casey Guest


    Being drunk is ancillary. The beer is for ballast. The optimal setup is
    four pints inside and one in the left hand extended backwards at 45
    degrees. BTW never drink and drive. You'll spill it.
     
  10. Rich Grise

    Rich Grise Guest

    "They" say, "Gasoline and alcohol don't mix." Bullshit. They mix just
    fine - it's just that it tastes _terrible_.

    ;-)
    Rich
     
  11. "They" say, "gasoline and alcohol don't mix." Bullshit - they mix just
    fine. It's just that it tastes _awful_.
     
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