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nutritionfacts_org
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# Posted: 26 Nov 2016 18:29
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Shielding Canopy's and Possible Leakage:

1. I'm still able to get a signal with a cell phone in a closed 50Hz grounded canopy. Is that possible without leakage if nearby masts and/or the phone signal is strong enough, or does that constitute leakage in the canopy?

2. Can large canopy's possibly be a bit leaky at the (corner) seams, and if so, how does one fix the leakage optimally?

Henrik
Admin
# Posted: 27 Nov 2016 02:27
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nutritionfacts_org,

Which type of cell-phone? GSM (2G), 3G or 4G.

There are wild differences in signal reception performance for phones of the different technologies - hence the question.

nutritionfacts_org
Member
# Posted: 29 Nov 2016 17:26
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Henrik

Edge/G2/GSM is still able to penetrate albeit with a weak signal.

horsevad
Member
# Posted: 6 Dec 2016 18:43 - Edited by: horsevad
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Edge/G2/GSM is still able to penetrate albeit with a weak signal.

Empirically, a single wall shielding enclosures constructed by amateurs will readily bring exposure values down to 1/10 of the values experienced outside the enclosure.

If you combine two such shielding strategies you are down to 1/100 of the original value - which is fully sufficient in all but the worst cases.

If you want a more thorough shielding a more metodically stringent procedure is required. No opening in the enclosure should be larger than 1/40 of the wavelenght of the signal you want blocked.

For WiFi at 2,4 GHz the wavelength is 12,5cm, which means that no opening should be larger than about 3mm. Even in such instance you will still get a small amount of radiation penetration - mainly due to reflection phenomenon in the small waveguides created by the holes in the mesh textile.

For complete shielding (RF-dead environment) the shielding is made with thin sheets of aluminium - preferably in several layers with staggered joints.

My own electronic workshop is constructed as a RF-dead environment, by using one layer of aluminium fly netting and one layer of thin aluminium sheet. Inside there are no service available on the mobile phone - and a FM radio cannot tune to any station.

//Kim Horsevad

nutritionfacts_org
Member
# Posted: 14 Dec 2016 03:08
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Horsevad

Thanks for the info.

At present there's only a canopy at the location, no painting or shielding for now.

If I want to construct a completely RF-dead office/workspace, I'll then need:
- 1 layer of aluminium fly netting
- 2 layers of overlapping thin aluminium sheets

Questions to the RF-Dead office/workspace:
- Where can I buy such materials of good lasting quality?
- What materials are used to fasten the sheets and the netting?
- I presume the layers must be grounded?
- To make the workspace look "normal" (white), can wallpaper or something else like paint be applied on top of those layers?
- What about windows, doorways, sills, sockets etc?
- Does a guide exist for the above application?

horsevad
Member
# Posted: 14 Dec 2016 18:18
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Thanks for the info.

At present there's only a canopy at the location, no painting or shielding for now.

If I want to construct a completely RF-dead office/workspace, I'll then need:
- 1 layer of aluminium fly netting
- 2 layers of overlapping thin aluminium sheets




I cannot guarantee you any specific result from a list of materials. The important aspect is extreme attention to details during the construction. The materials used is of significantly lesser importance. But I can confirm that it certainly is possible to create a RF-dead environment using the abovementioned materials.

Be aware, though, that for a enclosure in a normal living environment you will probably want to avoid using aluminium sheet, due to condensation problems. Aluminium netting avoids such problems.

For shielding projects untertaken by amateurs without prior knowledge of the subject it is usually easiest to achieve the best results by using Yshields shielding paints. They have various formulations - some for exterior use and some for interior use.


Questions to the RF-Dead office/workspace:
- Where can I buy such materials of good lasting quality?
- What materials are used to fasten the sheets and the netting?
- I presume the layers must be grounded?
- To make the workspace look "normal" (white), can wallpaper or something else like paint be applied on top of those layers?
- What about windows, doorways, sills, sockets etc?
- Does a guide exist for the above application?


For purchase of special shielding products see Yshield.com
Aluminium netting can usually be bought considerably cheaper at a local hardware store.
Grounding is preferred - and is probably mandated by your local electrical code
Any material not interacting electrically with the shielding can be applied as a outer layer.
Openings for windows, doors, etc should likewise be fitted with some kind of shielding. No gap between the different shielding materials should be larger than 1/40 wavelength.
I am not aware of such a guide. I am in the process of developing one, but this project may take a while.

//Kim Horsevad

nutritionfacts_org
Member
# Posted: 19 Dec 2016 03:10
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Horsevad,

Thanks again for the info.

The canopy:
The room with the canopy is just a temporary one, until I move to a less radiated location. So at least from the beginning the canopy is seen more like an option, rather than part of a final solution. I'll go for an RF-dead environment, if it's possible. If there's no way around using the canopy, then the canopy it is as well.


Your RF-dead room:
- If your RF-dead room were situated 100-200m near a base station, would it still be RF-dead, considering the high signal strength of some masts?
- How would your RF-dead room handle 5G (specs unknown) and millimetre waves?


Shielding:
- What are the data/specifications of an optimal aluminium nettings and sheets? In addition, can you point to a couple of examples of optimum aluminium nettings and sheets from hardware stores?
- Yshield sells the netting V4A03/HEG03 (55dB, two-layer 75 dB, but less attenuation the higher the GHz), would that be sufficient for an RF-dead room?
- I would also like to future proof the RF-dead room for 5G, which means higher frequencies, and slightly different specifications for the nettings. What nettings should be used if I want to prevent 5G frequencies (not knowing the actual specifications of 5G, obviously)?
- Yshield paints are definitely an option, but paints only provide 55dB maximum attenuation. That would probably not provide a RF-dead room in itself?
- Yshield also sells wallpaper with (up-to) 100dB attenuation. That should be more efficient than painting. If I want 5G-ready RF-dead rooms, then this would be preferable over painting?
- How does one shield doorways? Even painting doors will leave a gap between the door and the sills.
- How does one shield sockets?
- If radiation levels becomes hysterical, I will (before moving) consider building an RF-dead room within a shielded living room, like a drumbox. Anything special I should consider for a room within a room?

horsevad
Member
# Posted: 24 Dec 2016 19:02
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Your RF-dead room:
- If your RF-dead room were situated 100-200m near a base station, would it still be RF-dead, considering the high signal strength of some masts?
- How would your RF-dead room handle 5G (specs unknown) and millimetre waves?



Yes, I would presume that - though some additional shielding around/behind the electrical sockets and around the cable ducts leading to the room would probably be necessary in a really high RF intensity environment - regardless of frequency.

The modulation specs for 5G are largely irrelevant with regard to shielding projects - the important parameter is the frequency. The higher the frequency, the easier can the signal penetrate through small openings in the enclosure. However, it goes both ways - the higher the frequency the more the radiation behaves like light. This means that simple aluminium sheets - or even aluminium foil (if you can ensure continuous electrical connection) provides a complete shielding. The paint from Yshield can also be used - nearly regardless of frequency. Most people find it easier to paint a surface than line it with aluminium sheets, although the sheets probably will give a better shielding (if you can ensure complete unbroken connection between the sheets!)

If you are prepared to accept some "unconventional apperance" of some of the interior building details it is fully possible to create a full shielding - even quite close to a high-effect RF source. However, remember that the enclosure practically becomes a prison for the electrohypersensistive, as they meet the full brunt of the RF source the moment the steps out of the enclosure. I would therefore recommend to find a house with a suitable distance to the nearest high-effect RF source.

//Kim Horsevad

targeted
# Posted: 16 May 2020 06:50
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test to see if i can actually post a reply

targeted
# Posted: 16 May 2020 07:08
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Looking at the dates of last postings I am not sure it will get read by anyone really. But newer the less, here it goes: and it might save someones life or quality of it.

I personaly did re-wall paper the whole small bedroom with thin 3/8 sheets of drywall OWeR the existing drywall. But only after I using water based glue paste on the existing drywall stick the sheets of Dolarama Aluminum foil just like You would do wall paper. You can use the (tacks) to temporarely keep the foil to come undone. All the aluminum foil is over laped by 4cm at joints. The thin drywall (3/8) is easy to handle and takes very little of space too.
taped it just like all drywall and sand then paint.
The result are fantastic, no more sweating at pre determed times, still a little leaks trough the door of the bedroom but thats neglient in comparisement to what I had to endure before.
trust me I know what I speak about, as I am a Targeted induvidual.
One more detail about the windows as this is a one the most critical parts of shielding. I made a empty frame from tongue and grove bords ( the pine ones and only a 1/4" thick. Imagine rectangle the size slightly larger than your window. dress it up with aluminum foild, overlaping the joints again of course. and hang it over the window/s frame. Bingo, all done. The rect angle is super light and can be stored somewhere else durring the daytime of course.

"Sure hope it will help someone, god bless you all who believe in Yahweh!

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