Some additional data points

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Posted by unclestu (D) on February 27, 2015 at 14:23:00

In Reply to: RE: Pardon my ignorance but posted by unclestu on February 27, 2015 at 13:54:55:

Mu metal plate does not like to be bent. Much of its magnetic properties become lost in the crystallization along the point of the bend. I believe you want to keep the radius of the bend about twice the thickness. This is easily achieved with foil, though, and the copper tape easily conforms. Helps to ground the copper of course. Mumetal is affected by heat, although I have soldered pieces together to fabricate boxes (Algo Hamilton wanted $500 each for transformer potting cases If I bought 500 pieces !)

Mu metal and any magnetic shielding, for that matter, does NOT like sharp 90 degree corners. Even a 45 degree angle snipe of flat sheet at corners helps, removing a slight upper frequency hardness.

The LessEMF.com website has a lot of weird stuff ( even for me, which is saying a lot). But read it very carefully, some of their application notes took me years to learn by trial and error. Don't look at their clothing line and laugh.

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Follow Ups Full Thread

Topic - TI-Shield wanted - pixelphoto 10:50:54 02/27/15 (16)

RE: TI-Shield wanted - PMC0607 01:02:26 03/05/15 (0)

I have a leftover piece - Awe-d-o-file 17:28:15 02/27/15 (0)

RE: TI-Shield wanted - Lew 13:48:23 02/27/15 (3)

RE: TI-Shield wanted - pixelphoto 14:13:53 02/27/15 (2)

You've jogged my memory... - Lew 10:22:17 03/04/15 (0)

Big Business - unclestu 14:56:43 02/27/15 (0)

Did you check Michael Percy? (nt) - Mike B. 13:35:56 02/27/15 (1)

RE: Did you check Michael Percy? (nt) - pixelphoto 22:30:31 02/28/15 (0)

Pardon my ignorance but - unclestu 12:20:44 02/27/15 (7)

RE: Pardon my ignorance but - pixelphoto 13:22:47 02/27/15 (6)

RE: Pardon my ignorance but - unclestu 13:54:55 02/27/15 (5)

Some additional data points - unclestu 14:23:00 02/27/15 (3)

RE: Some additional data points - pixelphoto 17:48:41 02/27/15 (2)

RE: Some additional data points - unclestu 18:23:21 02/27/15 (1)

PS - unclestu 18:48:05 02/27/15 (0)

RE: Pardon my ignorance but - pixelphoto 14:22:56 02/27/15 (0)

Follow Ups

Some additional data points - unclestu 14:23:00 02/27/15 (3)

RE: Some additional data points - pixelphoto 17:48:41 02/27/15 (2)

RE: Some additional data points - unclestu 18:23:21 02/27/15 (1)

PS - unclestu 18:48:05 02/27/15 (0)

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