Does anyone know if this anti 5G usb stick works?

:muscle:damn you :muscle: DAMN YOU HOLLYWOOD ALL TO HELL :muscle: :pouting_cat:

Actually, I’ve seen such a device as Sunspace described, in fact almost word for word the same, I don’t remember the dimensions of the space enclosed, 1 meter? 1.5 meters square? It was a while ago. That was the “no-go cubicle” for out janitorial company. We weren’t to touch it.

Re: chainlink Faraday cages… roughly speaking, the cage shields against electromagnetic radiation with wavelengths greater than the width of the holes in the cage.

So the screened cage I worked in, with openings a couple of millimetres wide, would block radio waves with a wavelength greater than a couple of millimetres (a frequency less than about 150 GHz). This is one reason why visible light could get though the cage; its wavelength is much less, between 380 nm for violet, and 750 nm for red (frequencies of roughly 680 THz to 480 THz).

Your chainlink Faraday cage would have openings say 3 cm wide, which would block radio waves of less than about 10 GHz. So depending on the frequencies the Evil Conspiracist Satellites are using, a chainlink faraday cage might actually work.

ETA: link to frequency/wavelength calculator:
https://www.everythingrf.com/rf-calculators/wavelength-to-frequency

I think that, for a chainlink Faraday cage to work, even for long-wavelength waves, you’d need good electrical contact between the the wires. Without that, you’d just have a (probably not very efficient) polarizer, not a barrier.

Yes, there would need to be good contact. And I’m trying to remember whether it needed to be grounded.

What is the main expense for building a good Faraday cage? Is it the copper?

Would a microwave be considered to be a Faraday cage?

Easy enough to test; put your cell phone in the closed, off microwave and then try to call it.

That only tells me if it weakens the signal enough that it can’t pick it up, which it probably will.

I was curious as to whether it was an actual Faraday cage, by the standards of those in this thread that have built or used them.

While Faraday cages often are grounded, they do not need to be grounded.

Meh, kinda. They do work as a Faraday cage but they are often a bit leaky. If you put a cell phone inside one (DO NOT TURN THE MICROWAVE ON OR YOU WILL DESTROY THE PHONE!!!) and call the phone it will usually ring, which proves that while a microwave will greatly diminish cell phone radio frequencies, enough RF leaks through that the phone can still work. Some of the bigger commercial microwave ovens make decent Faraday cages but most el-cheapo home microwaves don’t seal well enough.

On the one hand, when you run the microwave, you don’t cook anything (or anyone) outside of it.

On the other hand, it DOES usually mess up wifi.

So it’s blocking some waves, but not all.

A bit OT, but I am amazed by the number of people (even EEs who should know better) that believe something must be “grounded” in order to work. Almost nothing needs to be grounded in order to work. The only thing I can think of off the top of my head is a Marconi antenna that uses the earth as a ground plane. Of course, we do connect things to earth ground all the time. But that’s for electrical safety reasons, not in order to make a device “work.”

Was just working with an engineer who had a RF noise problem on a circuit. He said, “The problem will probably go away if we connect the circuit’s ground plane to earth ground.” I knew it wouldn’t work, but told him to try it anyway. Didn’t work. He didn’t realize or understand that, even if a connection to earth ground would fix the problem, a wire between the ground plane and the earth would have so much inductance that it would be an open circuit at the noise frequency.

I am not an RF expert, but I think the reason is due to the skin effect: I believe the effectiveness of a Faraday cage diminishes at wavelengths that are much longer than the thickness of the metal enclosure. “Skin depth” and all that stuff.

What does that prove? I only have the one phone.
:flees:

Do you guys just put the word “quantum” in front of everything?

yes, and we take great solace at it.

Lightning rods?

Well, yes. :slight_smile: OTOH, a building still “works” without lightning rods, and the rods are simply there for protection. I addressed this in my earlier comment.

Yes and no.

At the same job, they bought some commercial microwave ovens and ripped the guts out of them to simply use the enclosures as test chambers. I never found out what happened to the guts; I was pondering making a microwave pistol out of the magnetron, if I could work out the impedance matching.

00simster - licensed to kill make dad jokes.

And you need very well-constructed gates.

Referring back to the anti-5G USB stick, and all the technobabble pertaining thereto:

This all seems like so much over-kill. All I wanted was your basic generic turbo-encabulator.