Recharging Alnico/Ferrite magnets

[magger]

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

[Hofmannhp]

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

[Steve Gonzales]

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.

[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.

[toddalin]

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.

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.

[Hofmannhp]

..... 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

[Mr. Widget]

... and if it's possible to regauss the magnets without removing the diaphragm?

Yes.


Widget

[Guido]

Yes. Widget

Also the Alnicos? I don't think so.