[time-nuts] FE-5680 frequency jump

[Magnus Danielson]

On 04/06/2013 01:21 PM, Magnus Danielson wrote:
> On 04/06/2013 09:34 AM, Attila Kinali wrote:
>> On Fri, 5 Apr 2013 23:18:49 -0600 (MDT)
>> "Don Latham"<djl at montana.com> wrote:
>>
>>> Actually, mumetal easily loses permeability, hence shielding ability,
>>> by mechanical stress or heat. Some mumetals are made to bend for boxes
>>> and the like, sheets available from electronics goldmine, I think.
>>
>> Actually, one of the questions i had in my head when waking up this
>> morning was: Mumetal is pretty sensitive to everything.. but how is
>> it machined if bending and heating damage it?
>
> As mentioned on this list, you re-anneal it again.
>
> Bruce has more details.
>
> http://en.wikipedia.org/wiki/Mu-metal
> http://www.magnetic-shield.com/pdf/mu-2.pdf

These links could be of further use:
http://www.magnetic-shield.com/science-research-and-education.html
http://www.magnetic-shield.com/faqs-all-about-shielding.html

Cheers,
Magnus