One of the easiest ways to protect electronic equipment from the damaging effects of an EMP is to store them in RF-shielded bags. The challenge becomes picking out bags that provide the highest level of shielding. Most bags sold on the internet have never even been tested for shielding effectiveness. Don’t be fooled by people testing with stun guns – that’s just for show and completely irrelevant to EMP protection.
With a PhD in electrical engineering, I was fortunate enough to have the equipment to test numerous brands of bags for their shielding effectiveness. The Dri-Shield 3400 series bags were shown to be superior to all others, providing approximately 50 dB of shielding across all relevant EMP frequencies (100 kHz to 1 GHz). That means they will reduce the electric field by at least 99.7%, reducing even a worst-case 50,000 V/m down to 158 V/m – a level that most electronics would survive.
Please see the FAQs section to learn more about layering and sealing the bags.
If you’d like to see more about how I conducted the tests, check out my videos on youtube. One of them in which I discuss EMP bags is given below: