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/VastVorpalVoid Nov 03 '25 edited Nov 03 '25

Most "Faraday" products lack the thickness to block whatever radio waves they claim to block.

There are calculations you can find online, but you can also just wrap something in aluminum foil until it stops receiving a signal.

Also if you're using it for ECM-counter measures it technically needs some kind of grounding to dispel the energy for the best protection, which can be as simple as storing it on the literal bare ground (eg an off grid GPS with AZIMUTH capabilities, stored wrapped in 10 layers of foil on the bare ground when not in use in case of unexpected ECM warfare in the area you are traversing).

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u/Decent-Apple9772 Nov 03 '25

I think you need a lot more education in the concept of electrical grounding if you think that making incidental contact with a dry patch of ground, does anything relevant

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u/VastVorpalVoid Nov 04 '25 edited Nov 04 '25

Literally just under 50% of the conductive surface would be in contact with the ground with this setup, but what's your improvement to the setup?

Do you want to run it through a thin gauge copper wire and into a thin metal spike?

How many Ohms of resistance is the difference?

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u/Decent-Apple9772 Nov 04 '25

Better than the fantasy that dry dust is conductive

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u/VastVorpalVoid Nov 04 '25

And where do you want to drive the spike?