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Mu Metal Sheets
Mu Metal Sheets
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Old 11th February 2017, 10:06 AM   #1
sumotan is offline sumotan  Indonesia
diyAudio Member
 
Join Date: Oct 2013
Default Mu Metal Sheets

Hi Guys
Saw this in Ebay & am wondering if it works.
Going to build a hybrid intergrated UCD amp
so wondering if its any use to shield the smps
& transformers from the ciruits
Sorry if its in the wrong forum but notsure
where to post is appropriate

Thks Guys
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Old 11th February 2017, 10:29 AM   #2
OlegSh is offline OlegSh
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Join Date: Dec 2010
Location: Germany
Mu Metal Sheets
I would recommend to read this wikipedia article before considering mu metal for diy magnetic shielding. Note the need for annealing in hydrogen atmosphere if you ever bend the material. IMO, it is useless for diyer unless you buy a ready made shield in its final shape produced industrially. And even then it mostly relevant for low frequency shielding.

Regards,
Oleg
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Old 11th February 2017, 10:37 AM   #3
sumotan is offline sumotan  Indonesia
diyAudio Member
 
Join Date: Oct 2013
Thank you Oleg. Yes this is what I understand about Mu Metal.
Sinca it is in sheets with adhesive backing. Was just wondering
if it is any good just to line the box.

Thanks again
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Old 11th February 2017, 12:30 PM   #4
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Mu metal, if used, should be around the sensitive circuit not the source of the interference. In almost all cases it is not needed for audio. Exceptions might be instrumentation or input transformers (e.g. for microphones).

Use distance, orientation, wire twisting etc. to achieve the same result.
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Old 11th February 2017, 12:44 PM   #5
sumotan is offline sumotan  Indonesia
diyAudio Member
 
Join Date: Oct 2013
Many thks DF96. Btw I'm using EI transformers.
I recall an article that I've read long time ago
but can't remember how to test & orientate
the transformers for lowest EMF

Cheers
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