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Thread: Recharging Alnico/Ferrite magnets

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  1. #1
    Junior Member magger's Avatar
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    Recharging Alnico/Ferrite magnets

    Hello forum,

    Question ... I know it is possible to recharge alnico magnets back to their respectable gauss values. Is it possible as well to recharge ferrite magnets? I own various JBL items (alnico drivers, ferrite based basses etc.) I have experienced that alnico JBL items have lost their gauss levels due improper storage/transport/load etc.

    That's the reason I post this question. Is there a difference between alnico vs. ferrite magnetic structure losing it's gauss due to mishandling, or (improper)load etc?

    MISC: I am from Europe, anyone aware of a place inside Europe that regausses magnets? The case here is varioius JBL items.

    Thank you,
    Magger

  2. #2
    Super Moderator Hofmannhp's Avatar
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    regaussing

    Quote Originally Posted by magger
    Hello forum,
    MISC: I am from Europe, anyone aware of a place inside Europe that regausses magnets? The case here is varioius JBL items.

    Thank you,
    Magger
    Hi Magger,

    the only company I know is "D. Lange u. Partner" in Berlin a well known Isophon specialist which regausses others too.

    HP
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  3. #3
    Steve Gonzales
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    a good read

    You may find this interesting:
    http://audioheritage.org/vbulletin/s...ead.php?t=4031

    There is a search function here that is helpful. It is located in that thin black bar located above. I've never heard of recharging a ferrite magnet as part of routine maintenance. It is strongly recommended to recharge AlNiCo drivers here though.

  4. #4
    Junior Member magger's Avatar
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    Steve and Hoffmann,

    I was wondering if you have any idea about how much it costs to regauss alnico magnets, and if it's possible to regauss the magnets without removing the diaphragm?

    Thank you for your inputs.
    Thank you,
    Magger

    JBL ... quality of life.

  5. #5
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    OCS quotes $45 just to regauss or $25 if you are having the speaker redone. Thus, it seems logical to assume that they can do a working speaker. I think JBL quotes (quoted) $27.

    Quote Originally Posted by magger
    Steve and Hoffmann,

    I was wondering if you have any idea about how much it costs to regauss alnico magnets, and if it's possible to regauss the magnets without removing the diaphragm?

    Thank you for your inputs.

  6. #6
    Super Moderator Hofmannhp's Avatar
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    Carl Friedrich Gauss

    Quote Originally Posted by toddalin
    ..... to regauss .......
    Hi All,

    a man to remember, ...certainly as important like James B. Lansing.
    Carl Friedrich Gauss 1777 - 1855,... born in Braunschweig / Germany.
    HP

    BTW: he looks a little ugly hearing some want to recharge Ferrites
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  7. #7
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by magger
    ... and if it's possible to regauss the magnets without removing the diaphragm?
    Yes.


    Widget

  8. #8
    Senior Member Guido's Avatar
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    Quote Originally Posted by Mr. Widget
    Yes. Widget
    Also the Alnicos? I don't think so.

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