how to make a degaussing coil?

Answer 1

It depends on how big an object you want to demagnetize. If it is small hand tools like a screwdriver, what I use is a soldering gun like the one shown in the link below. Just turn it on and run the end of the screwdriver inside the loop between the gun and the tip, and pull it back out again while the gun is still turned on. You can also magnetize an object by releasing the switch on the gun while the object is in the loop.

If you need to demagnetize a larger object, all you need to do is make a suitable sized coil using a lot of turns of magnet wire. The number of turns depends on the AC voltage you are going to use, the size of the coil, the size of the wire, and other factors that are too complex for a brief discussion here. If it is for momentary usage, you could tolerate some heating of the coil and get by with fewer turns. If you have access to a stepdown transformer to power the degaussing coil, like 6.3 volts at several amps, you could probably make a 6" diameter coil with 100 turns of 24 gauge magnet wire. This is my semi-educated guess as I have not run through any of the math.

Magnet wire should be available at any electronic supply store or Radio Shack.

Answer 2

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RE:
how to make a degaussing coil?

Answer 3

I have not had the need for one for many years. They used to be available at electronics supply stores that are for professionals. They were cheap enough that it was not worth making one.

What are you going to do with it? Perhaps by knowing, we can have some alternative suggestions. Now we are just guessing as to what you want. Most CRT devices that need them have them built in already.

Answer 4

If you can find an old audio/video tape degausser, then your prayers are answered. You can make one, but you will basically be wasting your time.

In using one, put what you want demagnetized on the degausser and then, turning it right and left, slowly lift it up away from the degausser.