Video Asylum

Posted by AbeCollins (A) on March 30, 2003 at 10:24:44

In Reply to: Opening up TV cabinet to shield tv's internal speakers...should I do it? posted by pug on March 28, 2003 at 08:18:35:

Mu metal (pronounced 'mew') shielding might do the job. It is often used around CRT's (like oscilloscopes) to prevent external magnetic fields from interferring with the display screen. Also used to house magnetically sensitive instruments. Avaialable in sheets, foil, or preformed enclosures. I used mu metal shielding around the internal components of a rubidium frequency standard (small atomic clock) used as the time base for aircraft navigation equipment. It needed to be shielded from the varying magnetic field around different parts of the globe.

If your TV simply needs to be degaussed, most TV's have a built in degausser. Unplug it for several minutes then plug it back in and power it up. If that doesn't work, you can buy a stand-alone degausser (which is just a device that generates a strong AC field, usually a coil of wire). Wave it in front of your TV screen to "degauss" it. In the old days, TV repair shops would have a degausser in their toolkit and RadioShack used to sell them (maybe still do, I don't know).

Go to google.com and search on these topics:

- TV degausser
- mu metal
- magnetic shield

• Magnetic Shielding Products