poor man's Mu-metal

Hello eSens.

Well, I am trying to block the magnetic field from my wall. Rather than
fork out for Mu-metal or Giron from I've gotten some samples of copper
foil, tin and steel. I am hoping to create some modular panels rather
than foil the whole thing. SO far none seem to be working. I thought
the steel would work for sure (albeit heavier than I would have liked)
but I wonder if the sample is too small. Does anyone know what metal
would be ideal? I don't want to bring the whole wall down with a ton
of lead but if need be...I have access to a metal shop with all kinds
of things but, of course, no Magnetic Shielding Foil or Giron, per say.
If there is a separation between panels will it leak through?

Do you think if I make the panel I should wrap the foil (or sheet)
around the panel to create a parabola? I heard it won't absorb but
rather divert the field.

Any suggestions?

Tanya

Dear Tanya,
There are important reasons why the alloys you are using won't work. It all has to do with the magnetic permeability of the alloy. For a quick understanding of this property, see http://www.lessemf.com/faq-shie.html#Lead-Copper
Emil



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Thanks! I will look into getting some of the bonafida magnetic shielding.

Sort of on the subject, I am wondering what I am feeling the effects of more. I think it might be the electric field as I have symptoms from highly electrically charged things like fluorescents, for example but they don't seem to register much magnetic. I heard that magnetic fields might be a greater health risk though. It must be wires or pipes in my walls but the magnetic field registers greater than the electric.

Anyone clarify this, perhaps?

Tanya


To: [hidden email]: [hidden email]: Fri, 1 Feb 2008 00:17:04 +0000Subject: Re: [eSens] poor man's Mu-metal




>Hello eSens.>>Well, I am trying to block the magnetic field from my wall. Rather than >fork out for Mu-metal or Giron from I've gotten some samples of copper >foil, tin and steel. I am hoping to create some modular panels rather >than foil the whole thing. SO far none seem to be working. I thought >the steel would work for sure (albeit heavier than I would have liked) >but I wonder if the sample is too small. Does anyone know what metal >would be ideal? I don't want to bring the whole wall down with a ton >of lead but if need be...I have access to a metal shop with all kinds >of things but, of course, no Magnetic Shielding Foil or Giron, per say.>If there is a separation between panels will it leak through?>> Do you think if I make the panel I should wrap the foil (or sheet)>around the panel to create a parabola? I heard it won't absorb but >rather divert the field.>>Any suggestions? >>TanyaDear Tanya,There are important reasons why the alloys you are using won't work. It all has to do with the magnetic permeability of the alloy. For a quick understanding of this property, see http://www.lessemf.com/faq-shie.html#Lead-CopperEmil[Non-text portions of this message have been removed]






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There is a poor man's mu metal, and it's called grain-oriented silicon
steel.

Of course low frequency magnetic fields are hard to shield well, and one
needs to understand where the field lines are going and try to run the
grain in the steel parallel to the field, to encourage them to follow the
metal.

If the field is perpendicular to the wall, it is better to use thick
aluminum (or copper,
but aluminum is cheaper) like at least 3/8" thick (still expensive).

Bill

On Thu, Jan 31, 2008 at 5:34 PM, tanya wilson <[hidden email]> wrote:


[Non-text portions of this message have been removed]

Thanks Bill.

I get metal at pretty much cost but I'm not so sure about grain-oriented silicon steel. At least the guys in the shop will know where to get it. Next logical question: How do I find out the orientation of the field if it is behind the wall or otherwise? I know there's a simple answer probably but I'm tired and confused.

Tanya



To: [hidden email]: [hidden email]: Thu, 31 Jan 2008 17:46:11 -0700Subject: Re: [eSens] poor man's Mu-metal




There is a poor man's mu metal, and it's called grain-oriented siliconsteel.Of course low frequency magnetic fields are hard to shield well, and oneneeds to understand where the field lines are going and try to run thegrain in the steel parallel to the field, to encourage them to follow themetal.If the field is perpendicular to the wall, it is better to use thickaluminum (or copper,but aluminum is cheaper) like at least 3/8" thick (still expensive).BillOn Thu, Jan 31, 2008 at 5:34 PM, tanya wilson <[hidden email]> wrote:>> Thanks! I will look into getting some of the bonafida magnetic shielding.>> Sort of on the subject, I am wondering what I am feeling the effects of> more. I think it might be the electric field as I have symptoms from highly> electrically charged things like fluorescents, for example but they don't> seem to register much magnetic. I heard that magnetic fields might be a> greater health risk though. It must be wires or pipes in my walls but the> magnetic field registers greater than the electric.>> Anyone clarify this, perhaps?>> Tanya>> To: [hidden email] <eSens%40yahoogroups.comFrom>:> [hidden email] <lessemf%40lessemf.comDate>: Fri, 1 Feb 2008> 00:17:04 +0000Subject: Re: [eSens] poor man's Mu-metal>> >Hello eSens.>>Well, I am trying to block the magnetic field from my wall.> Rather than >fork out for Mu-metal or Giron from I've gotten some samples of> copper >foil, tin and steel. I am hoping to create some modular panels> rather >than foil the whole thing. SO far none seem to be working. I thought> >the steel would work for sure (albeit heavier than I would have liked) >but> I wonder if the sample is too small. Does anyone know what metal >would be> ideal? I don't want to bring the whole wall down with a ton >of lead but if> need be...I have access to a metal shop with all kinds >of things but, of> course, no Magnetic Shielding Foil or Giron, per say.>If there is a> separation between panels will it leak through?>> Do you think if I make the> panel I should wrap the foil (or sheet)>around the panel to create a> parabola? I heard it won't absorb but >rather divert the field.>>Any> suggestions? >>TanyaDear Tanya,There are important reasons why the alloys> you are using won't work. It all has to do with the magnetic permeability of> the alloy. For a quick understanding of this property, see> http://www.lessemf.com/faq-shie.html#Lead-CopperEmil[Non-text portions of> this message have been removed]>> __________________________________________________________>>> [Non-text portions of this message have been removed]>> >[Non-text portions of this message have been removed]






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Hi there,

A thought since you mentioned plumbing - we had very elevated magnetic
fields in our house - some spots on the floor higher than 25 mg! What
we did was install a dielectric coupler - this stopped a great deal of
the current from traveling along the piping - I was amazed at the
results one little piece of metal offered, and it considerably reduced
the levels in most parts of the house - to see what I mean, check out:

http://www.emfservices.com/ground.htm

FWIW, I've generally noticed high magnetic fields from fluorescent
lights, but to varying degrees - really depends, it seems, on the bulb
and whatever is running it.

Maybe check out the plumbing current link above - it would have cost a
fortune to shield the magnetic fields in our house using mu-metal.

Hope this is of some help.

Regards,

R.

--- In [hidden email], tanya wilson <end-user@...> wrote:
>
>
> Thanks! I will look into getting some of the bonafida magnetic
shielding.
>  
> Sort of on the subject, I am wondering what I am feeling the effects
of more. I think it might be the electric field as I have symptoms
from highly electrically charged things like fluorescents, for example
but they don't seem to register much magnetic. I heard that magnetic
fields might be a greater health risk though. It must be wires or
pipes in my walls but the magnetic field registers greater than the
electric.
>  
> Anyone clarify this, perhaps?
>  
> Tanya
>
>
> To: eSens@...: lessemf@...: Fri, 1 Feb 2008 00:17:04 +0000Subject:
Re: [eSens] poor man's Mu-metal
>
>
>
>
> >Hello eSens.>>Well, I am trying to block the magnetic field from my
wall. Rather than >fork out for Mu-metal or Giron from I've gotten
some samples of copper >foil, tin and steel. I am hoping to create
some modular panels rather >than foil the whole thing. SO far none
seem to be working. I thought >the steel would work for sure (albeit
heavier than I would have liked) >but I wonder if the sample is too
small. Does anyone know what metal >would be ideal? I don't want to
bring the whole wall down with a ton >of lead but if need be...I have
access to a metal shop with all kinds >of things but, of course, no
Magnetic Shielding Foil or Giron, per say.>If there is a separation
between panels will it leak through?>> Do you think if I make the
panel I should wrap the foil (or sheet)>around the panel to create a
parabola? I heard it won't absorb but >rather divert the field.>>Any
suggestions? >>TanyaDear Tanya,There are important reasons why the
alloys you are using won't work. It all has to do with the magnetic
permeability of the alloy. For a quick understanding of this property,
see http://www.lessemf.com/faq-shie.html#Lead-CopperEmil[Non-text
portions of this message have been removed]