Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: neilep on 26/12/2007 20:30:03

Title: Re-Magnetizing Old Magnets ?
Post by: neilep on 26/12/2007 20:30:03

Hi All,

Happy Whatever !!

Is it possible to re-magnetize old magnets ?...how is it done ?..can I do it here at home or do I need to take it to "Re-Magntetize Magnets R Us ?"

Thanks

Neil
xxxxxx

Title: Re-Magnetizing Old Magnets ?
Post by: lyner on 26/12/2007 22:46:28

All you need is an enormously strong electromagnet and put your old magnet between its poles for a second or so.
Where I used to work they had one for magnetising loudspeaker magnets.

Title: Re-Magnetizing Old Magnets ?
Post by: syhprum on 27/12/2007 11:19:34

Not to reccomended but when I was a boy and had only the AC mains supply as a source of power (no silicon diodes in the thirties) I used to boost the strength of the magnets in 120 ohm GPO earpieces by flicking the mains supply across the coils until I got the right part of the cycle, a matter of trial and error.