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How to make a tin can WiFi antenna after an EMP

- Oct 15, 2018 -

If you find yourself in an emergency situation, something as mundane as staying connected and being able to communicate can be the difference between survival and death. If the emergency was caused by an EMP, staying online can become particularly complicated but if you have the right knowledge — and a tin can — it doesn’t have to be. Here’s how you can make a WiFi antenna to boost your signal in the event of an emergency.

An article on TurnPoint.net shares steps on how to build your own WiFi antenna from a tin can. To do so, you will need the following materials:

  • N-Female Chassis mount      connector

  • Four small nuts and      bolts (only if your N-connector is not a screw-on)

  • About 1.25 inches of      12 gauge copper wire

  • A clean, empty tin      can, ideally between 3 to 3 2/3 inches in diameter


To build your WiFi antenna, do the following steps:

  1. Clean and remove the label on your tin can and open only one end of it.

  2. Drill or punch holes into the can so you can mount the probe. Make sure that the size of your hole is appropriate for the size of your connector. Also, keep in mind that where you place the holes is crucial, and needs to be calculated based on your can’s diameter. You can use the calculator on the TurnPoint.net site to determine the measurements you need.

  3. Assemble the probe and  mount in the can using the wire.

  4. Use your antenna by connecting it to a wireless card or access point. To do so, you will need a pig tail cable, which connects your access point to to the N-connector in your antenna. Once you connect the cable, you can point your antenna to any direction and see how well it works!

Survive an EMP

An EMP or electromagnetic pulse could happen at any given time, whether naturally through a solar flare, or through nuclear warfare. While it doesn’t sound particularly catastrophic, an EMP could bring down all the electronics and power grids in the country. The key to surviving an EMP is to have non-electronic appliances and tools on hand, as these will be unaffected by the electromagnetic radiation.

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