With the lid overlapping the way it does I can't see much getting in. This is primarily for storing electronics and digital media.
There are no emp weapons. If you are experiencing an EMP issue, you are experiencing a nuclear one as well.
Technically still Nuclear....How about a solar flare?
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Can you do a basic test at home by taking your cell phone and your homemade faraday cage to a location that normally has good service, putting your phone in the faraday cage, and then calling to see it if rings? You'd have to ground the faraday cage.
Not sure that this would tell you how much protection from an EMP it would provide.
EMF is line of sight. It doesn't go around corners, but it does reflect. To enter an ammo can it seems to me it would have to reflect back and forth in the tiny space between the can and the overlapping lip until it reached the gasket it could penetrate.
It like to see one put to a test, but have no idea how to simulate anywhere near the amplitude or frequency range, etc.
EMF is line of sight. It doesn't go around corners, but it does reflect. To enter an ammo can it seems to me it would have to reflect back and forth in the tiny space between the can and the overlapping lip until it reached the gasket it could penetrate.
It like to see one put to a test, but have no idea how to simulate anywhere near the amplitude or frequency range, etc.
I shall entitle this picture, "Faraday Rage!"I'm always ready for an EMP.
Let's see...first, yep, Johnson and Ott are great references.@RFMan I don't think I'm as skilled as you in this field, but I am an EE that has done electronic (embedded systems) design including correcting bad designs that suffered from EMI issues and in the process studied a lot of Howard Johnson and Henry Ott (a couple of the EMI greats). This leads me to question some of the hoopla and paranoia about an EMP and its ability to wipe out everything electrical and electronic.
I think much of the fear comes from earlier days, but much of the equipment back then was significantly more primitive in its design in that it worked at much lower frequencies in terms of rise/fall time bandwidth. Modern electronics in order to even work have a lot of mitigating factors that older ones would not; bypass capacitors, ground planes, surface mount packaging, smaller foot prints, etc. Coupke this with the idea that a field passing through a device would have a gradient over the size of the device and I have to question whether or not you would have enough volts/meter or amperes/meter respectively to induce a killing voltage/current in modern devices? This is similar to how it's easy to zap a part by ESD but much harder to once it's on a circuit board.
Granted much consumer stuff is junk in terms of RF and as you pointed out, there is the duality that also says a good emitter (cheap noisy electronics) are also going to be susceptible to interference. Still it doesn't take a whole lot to reasonably harden a device, but it needs to be designed that way. There is still the question of how consumer junk would be useful following a catastrophic event, in other words, what would you save that isn't already resilient by design?
There ARE HPM weapons...There are no emp weapons. If you are experiencing an EMP issue, you are experiencing a nuclear one as well.
A microwave has a grid on the front that is opaque at microwave frequencies, but passes visible light. It's all about wavelength versus the barrier. A microwave may not work as a faraday cage, but it certainly won't hurt.For cheap and easy as stated before just grab a microwave oven.
A microwave has a grid on the front that is opaque at microwave frequencies, but passes visible light. It's all about wavelength versus the barrier. A microwave may not work as a faraday cage, but it certainly won't hurt.
How about a solar flare?
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You would only be testing the frequency of your phone but not all frequencies...Can you do a basic test at home by taking your cell phone and your homemade faraday cage to a location that normally has good service, putting your phone in the faraday cage, and then calling to see it if rings? You'd have to ground the faraday cage.
Not sure that this would tell you how much protection from an EMP it would provide.
Why is everyone so concerned about protecting their phone during an EMP event? Hell I doubt the towers will be much good, so what good will the silly-assed phone be?
There are much more probable scenarios to be concerned about and certainly more important items to be concerned about, other than phones and digital media storage.
Do you know what isn't affected by and EMP?
God old fashioned books.
So, you have backup Wi-Fi routers and servers? GPS is an interesting question. Are the satellites hardened?Even if the towers are down you would still have local lan connection, ad-hoc and gps.. these have nothing to do with your cellular service.
Mil things tend to be, because they are mil. But keep in mind that GPS sats are in MEO, with both Van Allen (trapped particle) and cosmic ray exposure. They are hardened for the environment; not for prompt stuff, but for SEU (single event upset), total dose, and similar effects.So, you have backup Wi-Fi routers and servers? GPS is an interesting question. Are the satellites hardened?
Ad-hoc is a 1to1 connection no router required. Yes I can enable a wireless hotspot from my phone so I have a built in router.So, you have backup Wi-Fi routers and servers? GPS is an interesting question. Are the satellites hardened?
Even if the Sats weren't hardened and within range... it's not like a single or even multiple emps would knock them all out. You need to think about how many sats are up.. This ranges from google earth, tv and independently owned.So, you have backup Wi-Fi routers and servers? GPS is an interesting question. Are the satellites hardened?