How to Make an Electromagnet for Degaussing a TV
Degaussing is a method used to alter or reduce the strength of a magnetic field. Many televisions and computer monitors have a degaussing coil built into them. If not, the monitor or TV screen may display colored dots or splotches or an overall discoloration. It may be possible to correct this problem by using an electromagnet to externally degauss the television.
- Difficulty:
- Moderately Easy
Instructions
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1
Stripped copper wire
Use the wire stripper to remove 1 inch of the insulation from the end of a 22-gauge insulated copper wire. (You should have 3 to 6 feet of wire.)
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2
Starting at the head, wrap the wire around a long iron nail. Leave the part you stripped and a 10 inch tail of wire before you begin wrapping. Wrap the wire tightly around the nail, making sure not to let the coils overlap. Stop when you are about 1 inch from the bottom of the nail.
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3
As in Step 1, use the wire cutters to strip about 1 inch of insulation from this end of the wire. If the wire is much longer than the nail, you may cut it shorter.
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4
Now that the wire has been stripped, continue wrapping the now-bare wire to the tip of the nail. Make sure the exposed copper-wire wraps at the tip of the nail are tight, and are making good contact with the nail.
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5
To turn on the electromagnet, while holding an insulated part of the wire, place the exposed copper wire from the tail at the head of the nail against the top of the battery. Test the magnet by using it to pick up a few paper clips or other small, magnetic objects.
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6
To degauss the television, turn on both the TV set and electromagnet. Pass the electromagnet in front of the television screen until you get the desired effect. You may need to try holding the magnet at varying distances from the television screen.
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1
Tips & Warnings
The more coils you wrap around the nail, the stronger your magnet will be.
Do not attempt to make your magnet stronger by passing more electricity through it. The wire wrapped around the nail may become very hot. Be sure to wrap all of your wire in the same direction, or you may create two magnetic fields that will cancel each other out.
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Comments
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Help I used a magnetic screw driver to remove screws from back of tv and it all messed up. how do you get rid of the bad color?
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You have to have random lines of force with an AC supply to properly degauss a screen. I would be hard pressed to accept this method. You may wind up with spots all over the screen. I have never used a DC magnet to do this so I can't say for sure but what I know about it it would seem to be counter productive to use a magnet of any kind. I will try the one Devries has out lined instead of going to the trouble of building one , you can if you have an old set use the coil from that but you will need to place a light bulb at least a 60 watt inline with the coil. The CRT has a metal screen the electrons flow through and is directed by the guns and if the screen has any magnetism at all it will draw the beam to one spot there by showing something like a blue or lighter color in one area. I have never heard of any one that can de-magnetize a metal with a magnet.
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Marita Devries
Jan 13, 2011
The easiest way to degauss a TV without going through the effort of building an electromagnet is to use one you may already have such as a drill. Simply turn on your tube TV and Start the drill. Hold the drill with the side facing the screen and turn in wide circles as you slowly move the drill farther away from the set. When you are far enough away, simply turn the drill 90 degrees and then shut off. You can try this again until the problem of 'blooming' colors is corrected.
