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Discussion Starter · #1 ·
I’ve been on the hunt for a metal,container to act as a faraday cage. I’ve looked at metal cabinets and tool boxes, but they all seem to require a lot of modifications….

I have a galvanized garbage can cage currently, but it’s not quite big enough. Any thoughts on using metal 55g drums (re-sealable), to use? I think the only work involved would be sealing the bung holes on the lid…. Thoughts?

Blue Liquid Paint Fluid Waste containment
 

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You could use an old microwave oven as a faraday cage with no modifications if it keeps microwaves in it will keep microwaves out.
False.

How can I prove it? Simple. Look inside a microwave when it's running. See anything inside? Sure you do... there's little holes in the door. Heck, there's even a light bulb inside the thing to make it easier.

Those holes stop microwaves but allow light to pass through. Microwaves are a lower frequency than light, so the holes will only block low frequencies. Those same holes will allow higher freqeuncies to pass through, and it's those higher frequencies that will damage electronics.
 

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False.

How can I prove it? Simple. Look inside a microwave when it's running. See anything inside? Sure you do... there's little holes in the door. Heck, there's even a light bulb inside the thing to make it easier.

Those holes stop microwaves but allow light to pass through. Microwaves are a lower frequency than light, so the holes will only block low frequencies. Those same holes will allow higher freqeuncies to pass through, and it's those higher frequencies that will damage electronics.
TBF, @Mr.penguin did only claim it would stop microwaves.
That would technically qualify as a faraday cage.
Then it's a matter of whether it blocks the intended frequencies, which haven't been specified from what I can tell.
 

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TBF, @Mr.penguin did only claim it would stop microwaves.
That would technically qualify as a faraday cage.
Then it's a matter of whether it blocks the intended frequencies, which haven't been specified from what I can tell.
All fine and dandy. But if there's a large enough burst of microwave energy strong enough to fry your electronics, are you gonna survive the event?
 

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All fine and dandy. But if there's a large enough burst of microwave energy strong enough to fry your electronics, are you gonna survive the event?
OP hasn't mentioned what he's trying to protect against.
 

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OP hasn't mentioned what he's trying to protect against.
Well, considering it's about faraday cages, it's safe to say........ maybe......... possibly............. an EMP?
 

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Well, considering it's about faraday cages, it's safe to say........ maybe......... possibly............. an EMP?
It's speculative.
There are lots of reasons to use a faraday cage.
But EMP may be the reason. Until the OP lets us know, guess away.

Just the same, Mr. Penguin's statement was indeed true.
 

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You could use an old microwave oven as a faraday cage with no modifications if it keeps microwaves in it will keep microwaves out.
I've used an EMF meter while running my microwave and the meter does pick up a big spike. I'm not 100% sure but I think that means the microwave is not in fact keeping the microwaves in. Unless the EMF meter is picking up the electric motor in the microwave, and not the microwave energy?
 

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I've used an EMF meter while running my microwave and the meter does pick up a big spike. I'm not 100% sure but I think that means the microwave is not in fact keeping the microwaves in. Unless the EMF meter is picking up the electric motor in the microwave, and not the microwave energy?
To know that, you'd need to know if your EMF meter is a broadband or selective measuring device. Can you set a frequency range? If so, set it for 2.45Ghz and see if you detect anything outside the microwave oven while running it. If you do, you have a faulty oven and should replace it.
If you can't select a frequency range, your detector is capable of picking up a very large range of the EM spectrum. Knowing what it's detecting would be difficult to nail down in that case.
 

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Insofar as microwave ovens keeping microwaves in, if that is so, why are there warning signs about the possibility of them affecting pacemakers and such?

It seems to me that going to such great lengths to protect electronic devices may be futile, since the infrastructures that support these devices will also be destroyed so they won't work anyway. However, I am certainly not an expert on this and may well be wrong.
 

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... since the infrastructures that support these devices will also be destroyed so they won't work anyway. ...
Not necessarily. EMPs and CMEs don't always destroy everything that's unprotected.
 

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Discussion Starter · #16 ·
Insofar as microwave ovens keeping microwaves in, if that is so, why are there warning signs about the possibility of them affecting pacemakers and such?

It seems to me that going to such great lengths to protect electronic devices may be futile, since the infrastructures that support these devices will also be destroyed so they won't work anyway. However, I am certainly not an expert on this and may well be wrong.
the idea is to save some comms and solar generators/panels. That way I’d have some power for comms lights etc. things I won’t need infrastructure for.

yes, emp was my main concern.
 

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the idea is to save some comms and solar generators/panels. That way I’d have some power for comms lights etc. things I won’t need infrastructure for.

yes, emp was my main concern.
Appreciate the clarification!
 

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To know that, you'd need to know if your EMF meter is a broadband or selective measuring device. Can you set a frequency range? If so, set it for 2.45Ghz and see if you detect anything outside the microwave oven while running it. If you do, you have a faulty oven and should replace it.
If you can't select a frequency range, your detector is capable of picking up a very large range of the EM spectrum. Knowing what it's detecting would be difficult to nail down in that case.
Good info, thanks. Unfortunately it only lets me pick between magnetic, electric, and RF. I can't set a specific range.

As to the OP, I had the same experience as KellyDude. I tried once as well and I couldn't manage to make a homemade faraday cage that was genuinely RF-tight. Granted I was using tin foil but it was really surprising how the tiniest gaps between layers of foil would make it as if it wasn't even there. Didn't even reduce the RF.
 

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I've used aluminum foil with pretty good success. but I fold the edges over and really put pressure on the folds. I do 3 folds per seam. For real protection, I wrap that package in heavy (4 mil plastic) and then do another layer of foil, the same way. Then I do another layer of plastic and another layer of foil.
As far as the micro wave, My BSE brother, told me to tune a standard AM/FM radio to a good station and put in the oven. The radio had no problems receiving the station.
 

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I've used aluminum foil with pretty good success. but I fold the edges over and really put pressure on the folds. I do 3 folds per seam. For real protection, I wrap that package in heavy (4 mil plastic) and then do another layer of foil, the same way. Then I do another layer of plastic and another layer of foil.
This nesting method is the best way to give yourself a solid chance of your equipment surviving if you have no real means of testing. Solid advice.
 
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