Wondering about Mu metal

[beedees]

Anybody here know if Mu metal could be salvaged from old PCs? I have been trying some different ideas about sheilding, and so far have come up with about 50-60 % effectiveness. Thanks , Dan

[Craigy]

In the Hard disk drives covering the magnet in the corner you will find some.
Very hard to get effective shielding but the metal in those drives is the best i have come across so far.

Craigy

[gyulasun]

Anybody here know if Mu metal could be salvaged from old PCs? I have been trying some different ideas about sheilding, and so far have come up with about 50-60 % effectiveness. Thanks , Dan

Hi,

Regarding shielding magnetic fields, it is worth trying other materials too, (especially if they are not ferromagnetic)  like referred to elsewhere in this forum:
http://www.overunity.com/index.php/topic,1771.msg20161.html#msg20161

rgds
Gyula

[beedees]

Thanks for the tips, what I'm working with now can't really be called shielding......more like mis-direction I guess. So far, only enough power to run itself but nothing useable.   Thanks, Dan

[gyulasun]

Hi Dan,

Could I be curious to learn about your setup? Because so far I have not managed to gain enough output from any setup I tried to run itself.     
If your setup runs itself, then you have made a huge step forward from your first post here in this thread where you mentioned 50-60%.
I think if you try to mis-direct flux, the higher permeability material you use the better BUT saturation is the tradeoff here. From this point of view the normal mains transformer laminations are good (and relatively still cheap), no real need for exotic mu-metal or permalloy or even metglas, especially,when you quickly wish to test an idea.

rgds
Gyula