OT: CRT EMI Shield

From: John Lawson <jpl15_at_panix.com>
Date: Tue Jun 1 11:41:29 2004

On Tue, 1 Jun 2004, Ed Kelleher wrote:

>
> The kind magnets will stick to.
> Hold the magnet on the screen of a CRT to see similar distortion.


 Are you volunteering to have the monitor repaired after he does that???

  Many times such a course of action will magnetize the shadow mask and
other parts of the CRT beyond the ability of the internal degaussing coils
to correct.

  But O well.....

 To the original poster:

  As for stacking tubes one on top of the other - if it's just the one
that's causing the magnetic pollution, I'd be inclined to chuck it (at
your appropriate nearby E-Cycling facility of course!) and just get
another. They're common as dirt and as folks trade up to LCD screens, CRT
monitors are hitting the recycle streams in epidemic quantities. Nobody
wants a 100-pound 23" CRT that takes up half the desk anymore...

  If you must shield them, then use reasonably thick (1/8" to maybe 3/16")
*iron* sheets if you can it - magnetic steel if you can't.

  And Home Depot. Lowe's, etc are going to stick it to you if you buy such
materials there... it's unbelievably outrageous what the charge for bar
stock, angles, and sheets.... any little funk metal shop or machine shop
will have tons of this stuff lying around for cheap...

  Just my 200 millidollar.


John
Received on Tue Jun 01 2004 - 11:41:29 BST