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Faraday cages
#1
Has anyone built one (or more)? I'm going to make one for small handheld devices and my laptop, and also plan to build one large enough to store my generator in when it's not in use.
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#2
You mentioned a genny, do you by any chance have one of those small tin sheds? Those are easy to make into a makeshift cage.

Honestly, I have made a few small ones. I did one in the garage to protect a few key things, and I am working on another small one for once the HAM gets sent up to me.

What do you want to know?
This will be the best security for maintaining our liberties. A nation of well-informed men who have been taught to know and prize the rights which God has given them cannot be enslaved. It is in the religion of ignorance that tyranny begins. -Ben Franklin
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#3
they seem easy to make. a simple metal can works. need it to breathe just make it out of a grate. something like this

http://www.amazon.com/Science-First-Fara...aday+cages
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#4
Connal;41460 Wrote:What do you want to know?

I'm just curious if anyone else has thought about this eventuality and/or acted on it. Given the breadth of preparedness discussion that happens here, I was surprised it hasn't been mentioned yet.

ExcelToExcel;41461 Wrote:they seem easy to make. a simple metal can works. need it to breathe just make it out of a grate. something like this

http://www.amazon.com/Science-First-Fara...aday+cages

I know you can use mesh, but I've seen warnings that the holes need to be "significantly smaller than the wavelength of the radiation", and I don't know much about the varying wavelengths and the corresponding mesh size. For the smaller one at least, I'm just going to use a solid container.
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#5
I wouldn't be concerned about trying to protect a generator from either an EMP or a CME. They don't have any solid state electronics in it to be susceptible to an EMP, and I doubt a CME would be able to induce enough charge into the coils of the generator head to cause any damage.

The danger that is talked about with a CME and the power grid is because the induced charge into the power system saturates the transformers and causes them to overload. Enough of those fail, a cascade failure starts to occur overloading more and more stations.

As for building one to store solid state electronics in, the best thing I thought of would be a Jobox. Run a length of ground braid around the lid where it meets the base, you'd probably have to scrape the paint off to ensure a good electrical "seal". Pack in your electronics and seal it up with aluminum tape. Grounding it wouldn't hurt either.
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#6
I've seen them use metal garbage cans lined with cardboard.
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#7
nomad;41466 Wrote:I've seen them use metal garbage cans lined with cardboard.

I'm a big believer of packing efficiency. Most electronic devices are rectangles. It doesn't make sense to pack a bunch of rectangles into a cylinder. Wink
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#8
streaker69;41468 Wrote:
nomad;41466 Wrote:I've seen them use metal garbage cans lined with cardboard.

I'm a big believer of packing efficiency. Most electronic devices are rectangles. It doesn't make sense to pack a bunch of rectangles into a cylinder. Wink

Square peg round hole guy huh. Big Grin
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#9
streaker69;41468 Wrote:
nomad;41466 Wrote:I've seen them use metal garbage cans lined with cardboard.

I'm a big believer of packing efficiency. Most electronic devices are rectangles. It doesn't make sense to pack a bunch of rectangles into a cylinder. Wink

Well some copper mesh, some two by fours. Definitely a start on it.

I mainly use mine for flash drives and the like. But I want to do something for the upcoming radio.
This will be the best security for maintaining our liberties. A nation of well-informed men who have been taught to know and prize the rights which God has given them cannot be enslaved. It is in the religion of ignorance that tyranny begins. -Ben Franklin
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#10
I've said it before, I'm more concerned about a CME than I am about an EMP attack. Fortunately, we do get a couple day's notice of an upcoming CME, if you pay attention to the correct websites.

http://www.spaceweather.com
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