DIY Magnetic Shielding

Written by jason thompson
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If you are an audiophile or have a high-tech home entertainment system, you should consider making your own magnetic shielding. Electronic devices put out electromagnetic fields, and these fields can sometimes affect other devices. For instance, the magnet in your speakers can distort the image on your television screen. Building a magnetic shield does not require special equipment or materials.

Skill level:

Things you need

  • Tape measure
  • Marker
  • Straight edge
  • Steel sheet
  • 16 angle brackets with associated nuts and bolts
  • Drill
  • 1-inch wide dowel
  • Hacksaw
  • Epoxy

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  1. 1

    Measure the dimensions of the device that you want to shield. Using the tape measure, marker and straight edge, draw five rectangles on the steel sheet. Two of them should be 1 inch taller than the device is tall by 1 inch wider than the sides of the device. Label these the sides of the shield. One should be 1 inch taller than the device is tall and 1 inch wider than the back of the device. Label this the back. The other two should be 1 inch wider than the back of the device is by 1 inch wider than the side of the device is. Label these the top and bottom.

  2. 2

    Cut the rectangles out of the steel sheet using the shears. Drill a small hole in the back piece of the shield. It should be just wide enough to fit any plugs or wires for your device through it.

  3. 3

    Attach the back of the shield to the bottom of the shield with two angle brackets. Drill holes in the sheets for the bolts. Attach the top of the shield to the back with two more angle brackets.

  4. 4

    Attach the two sides to the top of the shield, with two angle brackets for each side. Attach the sides to the bottom, again with two brackets each. Attach the sides of the shield to the back of the shield with the remaining angle brackets.

  5. 5

    Cut four ½ inch thick discs off of the dowel using the hacksaw. Epoxy them to the bottom of the shield to serve as the legs. Put your device into the shield. Run the plug and any other wires out the hole in the back. Face the device forward so you can access its controls. The steel box is a lot easier for magnetic fields to travel through than air. They therefore travel through the box and around the device inside it.

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