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Choosing a device to demagnetize a compass
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<blockquote data-quote="Bill Melody" data-source="post: 105277" data-attributes="member: 9146"><p>Here is a simple way to degauss (demagnetize) the compass in a drone, cell phone. etc. Take approximately 50 feet of flexible wire and wind it in a coil about 1 foot in diameter. Secure the coil in several places with some electrical tape or tie wraps. Using a step down transformer with an output of 12 to 24 volts AC (NOT DC) connect the transformers secondary (low voltage side) to the coil. You cannot use DC as this would make the coil into a magnet. Moving the coil in a circular motion move the coil close to the drone and wave it all around the drone., top, bottom, all sides before pulling the coil away from the drone. Rotate the coil so it is 90 degrees to the drone as you pull it away . Remember to continue the circular motion until the coil has been move 4 to 5 feet away from the drone. Powering down the coil while close to the drone can create a magnetic field so be sure to move the coil away from the drone before powering the coil down. Its really that simple.</p><p></p><p>A doorbell transformer or a filament transformer removed from and old tube radio is all you need. Find a ham radio operator in your area and ask to borrow and old transformer. I have used this method in the past to degauss my cell phone.</p></blockquote><p></p>
[QUOTE="Bill Melody, post: 105277, member: 9146"] Here is a simple way to degauss (demagnetize) the compass in a drone, cell phone. etc. Take approximately 50 feet of flexible wire and wind it in a coil about 1 foot in diameter. Secure the coil in several places with some electrical tape or tie wraps. Using a step down transformer with an output of 12 to 24 volts AC (NOT DC) connect the transformers secondary (low voltage side) to the coil. You cannot use DC as this would make the coil into a magnet. Moving the coil in a circular motion move the coil close to the drone and wave it all around the drone., top, bottom, all sides before pulling the coil away from the drone. Rotate the coil so it is 90 degrees to the drone as you pull it away . Remember to continue the circular motion until the coil has been move 4 to 5 feet away from the drone. Powering down the coil while close to the drone can create a magnetic field so be sure to move the coil away from the drone before powering the coil down. Its really that simple. A doorbell transformer or a filament transformer removed from and old tube radio is all you need. Find a ham radio operator in your area and ask to borrow and old transformer. I have used this method in the past to degauss my cell phone. [/QUOTE]
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Choosing a device to demagnetize a compass