[Boatanchors] Need magnetic shield for shaded pole motor

[Brian Clarke]

Silver-plated copper is good for E-field attenuation, but
approximately useless for H-field attenuation. For H-field
attenuation, you need high permeability steel of a thickness dependent
on the frequency and the amount of attenuation desired. See any
standard text on EM shielding, eg Ott.73 de Brian, VK2GCE. 
Brian Clarke
BE, MBA, PhD, CPEng, FIEAust
MD, Clarke & Associates P/L

----- Original Message -----
From: "rbethman" 
To:"Boatanchors @ Mailman" 
Cc:
Sent:Fri, 03 Jan 2014 15:26:20 -0500
Subject:Re: [Boatanchors] Need magnetic shield for shaded pole motor

 On 1/2/2014 9:23 AM, james.liles at comcast.net wrote:
 > Any ideas for an effective Gaussian shield for an open frame shaded

 > pole motor or a source for very high permeability transformer core 
 > uncut sheets.
 >
 > Thanks for any ideas--- Kindest regards Jim K9AXN
 Jim,

 I see your address in QRZ. I have what may be precisely what you
need.

 Would two sheets of silver plated copper expanded mesh, 13" x 13 " x 
 0.009" do the encapsulation of this shaded pole motor?

 Bob - N0DGN

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