Hi, new to electronics, is it possible for me to build my own Faraday cage and counter surveillance equipment?

SeekingProtection · Apr 27, 2019

Hi,

This is my very first post on this great forum. I do not have any background in electronics.

I want to know if it'll be possible for me to build my own Faraday cage, what tools and equipment would I need? On the net, people are saying, one would need wood, aluminum mesh or copper mesh. Which of these two is better? Is there a way to verify that the aluminum mesh I receive is really aluminum and not something which is passed off as aluminum. Will it block almost all EMF?

Is it possible for a normal person to build their counter surveillance equipment of the sort shown below?

1. 12 Antenna all frequency jammer:

2. Hidden spy camera viewer at naconwireless.com our-products anti-spy-equipments ?SingleProduct=22

Thanks

JimB · Apr 27, 2019

SeekingProtection said:
want to know if it'll be possible for me to build my own Faraday cage,

Yes if you have sufficient mechanical ability.

SeekingProtection said:
what tools and equipment would I need?

General metal working tools, and woodworking tools if you want to make a wooden frame rather than a metal frame.

SeekingProtection said:
aluminum mesh or copper mesh. Which of these two is better?

Probably copper, it has a higher conductivity than aluminium, but is more expensive.

SeekingProtection said:
Is there a way to verify that the aluminum mesh I receive is really aluminum and not something which is passed off as aluminum.

What material do you think could be passed off as aluminium?

SeekingProtection said:
s it possible for a normal person to build their counter surveillance equipment of the sort shown below?
1. 12 Antenna all frequency jammer:

Yes it is possible if you have sufficient knowledge.
But beware, using such a thing is illegal in all civilised countries, and most uncivilised ones as well.

JimB

kubeek · Apr 27, 2019

SeekingProtection said:
Is it possible for a normal person to build their counter surveillance equipment of the sort shown below?

I wouldn´t call such a person who feels the need to do that "normal", regardless whether the need is justified or not. If someone really needs counter surveillance equipment then he is not a normal ordinary man, and someone who is paranoid enough to think he needs that is not acting as a normal person.

SeekingProtection · Apr 27, 2019

JimB said:
Yes if you have sufficient mechanical ability.

General metal working tools, and woodworking tools if you want to make a wooden frame rather than a metal frame.

If I go with metal frame, what metal should I use?

JimB said:
Probably copper, it has a higher conductivity than aluminium, but is more expensive.

What material do you think could be passed off as aluminium?

Do you think this copper mesh will suffice?

Link: https://www.amazon.com/Beyondsupply...opper+screen&qid=1556381932&s=gateway&sr=8-29

Suppose I order the above or similar aluminum mesh from Amazon, the seller instead of sending the mesh made out of real aluminum or copper, they might send a bronze mesh or plastic mesh painted with shiny silver paint or shiny brown paint and pass it off aluminum or copper, is/are there any tests I can run on those mesh to verify that it is really aluminum or copper instead of any other material?

JimB said:
Yes it is possible if you have sufficient knowledge.
But beware, using such a thing is illegal in all civilised countries, and most uncivilised ones as well.

JimB

So you think one can build such a jammer with something a person can buy at a regular electronics shop? Where would I find the knowledge and parts for it?

Thanks for your helpful comment.

SeekingProtection · Apr 27, 2019

kubeek said:
I wouldn´t call such a person who feels the need to do that "normal", regardless whether the need is justified or not. If someone really needs counter surveillance equipment then he is not a normal ordinary man, and someone who is paranoid enough to think he needs that is not acting as a normal person.

Nice insights into what a normal person is and what non-normal(abnormal) person is? I may have phrased it differently, would you have liked it if I used "average" person or "lay" person, or a "common" person?

dr pepper · Apr 27, 2019

There is a steel container full of control gear where I work, I can easily make mobile calls from within it, even with the door closed.
This being the case a spy device using microwave freq's would also work.
The container is about 2mm steel, so you either need to use steel much thicker or something more conductive like ally or copper.
You can use mesh, the size of the holes is depicted by the highest freq you want to block, for phone signals I'd take a guess at 3mm or less holes.
Copper cable is sometimes sold as copper when actually its copper plated ally, you can tell by weight.
If you have no experience of electronics dont try to build a jammer for all frequencies, such a device is a challenge for an experienced engineer.
I'm sure the device you linked us too does what it says, however spy devices can use other freq than phones, to block lower freq signals would require a huge antenna.

nsaspook · Apr 27, 2019

Cheap Faraday cage for equipment.

SeekingProtection · Apr 27, 2019

nsaspook said:
Cheap Faraday cage for equipment.

What?

nsaspook · Apr 27, 2019

SeekingProtection said:
What?

Diver300 · Apr 27, 2019

dr pepper said:
There is a steel container full of control gear where I work, I can easily make mobile calls from within it, even with the door closed.
This being the case a spy device using microwave freq's would also work.
The container is about 2mm steel, so you either need to use steel much thicker or something more conductive like ally or copper.

I don't think that the issue is the thickness of the metal. It's more likely to be the fact that the doors are only connected in a few places. When you have screened rooms, there sprung brass connectors all around the doors.

JimB · Apr 27, 2019

Diver300 said:
I don't think that the issue is the thickness of the metal. It's more likely to be the fact that the doors are only connected in a few places. When you have screened rooms, there sprung brass connectors all around the doors.

Also, all cables in and out of the screened room are filtered to stop RF signals leaking in and out on the power supply cables.

JimB

JimB · Apr 27, 2019

SeekingProtection said:
What?

A metal dustbin could be adapted as a mini screened room.

JimB

SeekingProtection · Apr 27, 2019

JimB said:
Also, all cables in and out of the screened room are filtered to stop RF signals leaking in and out on the power supply cables.

JimB

How would you filter our RF signals from cables?

nsaspook · Apr 27, 2019

SeekingProtection said:
How would you filter our RF signals from cables?

It depends on the level of filtering needed. For something like TEMPEST the requirements are stringent and require approved enclosure intrusion methods.

Random power filter examples:
http://www.astrodynetdi.com/docs/default-source/default-document-library/rpt5000-atdi-edit.pdf
**broken link removed**

SeekingProtection · Apr 27, 2019

nsaspook said:
It depends on the level of filtering needed. For something like TEMPEST the requirements are stringent and require approved enclosure intrusion methods.

Random power filter examples:
**broken link removed**
**broken link removed**

Thanks for this information.

nsaspook · Apr 27, 2019

SeekingProtection said:
Thanks for this information.

Just about anything you build at home will not stop government level surveillance on active electronic devices if you are specifically targeted. The best countermeasure, remove that battery and/or unplug it from utility power.

SeekingProtection · Apr 27, 2019

nsaspook said:
Just about anything you build at home will not stop government level surveillance on active electronic devices. The best countermeasure, remove that battery and/or unplug it from utility power.

That's disappointing. What would stop government level surveillance.

shortbus= · Apr 27, 2019

SeekingProtection said:
That's disappointing. What would stop government level surveillance.

Either not doing what your doing or a new government.

SeekingProtection · Apr 27, 2019

shortbus= said:
Either not doing what your doing or a new government.

What kind of technology would the government have which would bypass Faraday cage?

nsaspook · Apr 27, 2019

SeekingProtection said:
What kind of technology would the government have which would bypass Faraday cage?

That would be telling. COMSEC is a lot more than just EM emissions control, just like computer security is more than secure passwords. A hammer to the kneecap (in extreme cases only) is an effective way to crack systems too.

Hi, new to electronics, is it possible for me to build my own Faraday cage and counter surveillance equipment?

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