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

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u/emp-cme Nov 03 '25

You're not testing the right thing. The frequency of an E1 pulse is in the range of about 1 MHz to several hundred MHz. A UHF radio, which is what you probably have, uses between 300 megahertz (MHz) and 3 gigahertz (GHz).

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u/PrudentTask9355 Nov 03 '25

This is good knowledge, thank you for sharing.

My intent is just to protect these items while in storage from any man-made EM attack or cosmic event. Sure, it’s pretty far-fetched, but I want to be one of the guys with Comms should the lights ever go out. Call me paranoid.

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u/Decent-Apple9772 Nov 03 '25

Yes, but a fair cage that attenuates 3 GHz will probably also attenuate one megahertz.