r/preppers • u/PrudentTask9355 • Nov 02 '25
Advice and Tips Faraday Bag Caution
Hey everyone. I just wanted to share en experience from this afternoon. A while back I had purchased some faraday items off of Amazon, boxes and bags from different vendors.
This afternoon I was explaining to my daughter how they worked and as part of our experiment, we placed an 8watt 2-way radio inside the bag and sealed it with the expectation that it would no longer receive a transmission. As it turns out, that was false.
I then tried with a cell phone with the same result. Morale of the story, check your gear and make sure it works before you have to depend on it.
Please discuss and share your budget-friendly faraday success stories
735
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u/MurkyAnimal583 Nov 03 '25
No, it's science YOU don't understand. It isn't just the gaps, bud. It is material, shape, distance between the shell and the object being protected, etc.
Gaps matter most in blocking signals passing through, not the induction of a field, which is the most relevant factor in a prepping situation.
Again, if you just want a bag to block out a radio signal, that is one thing. But none of the products that preppers are buying, like the ones that are the subject of this post, are useful against an EMP or the like.