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home:special:effects_of_emf:measuring:looking_for [06.26.2018] – [Looking for sources of Radio Frequency Radiation] sallieq | home:special:effects_of_emf:measuring:looking_for [09.13.2018] (current) – removed sallieq | ||
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- | ====== Looking for sources of Radio Frequency Radiation ====== | ||
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- | //related articles// | ||
- | * [[home: | ||
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- | First, at low frequencies (< | ||
- | Low RF frequencies are generally in the range 20Khz to 3MHz, HF (High Frequencies) are 3-30MHz, and VHF above that to about 500MHz. Cellphones operate in the 700-900MHz and 1800-2100MHz regions (some LTE is outside this range), NFC sensors are at 13.56MHz, smart electric meters are typically 900MHz (plus Zigbee WiFi), WiFi is 2.4HGz and 5GHz, and WiGig is at 60GHz. | ||
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- | The CWS systems have been at 6.78MHz, 13.56MHz and 27.12MHz | ||
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- | A month or two ago I started to revisit the topic of quieting down the appliances and adapters in my own house. What surprised me was the huge amount of noise emitted by the power adapters for charging USB, running Routers, etc. I ended up throwing most of them away. | ||
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- | The best way to see if a device is emitting electromagnetic signals is to use a Spectrum analyzer. This is basically a device which shows the entire frequency spectrum in one sweep, and some sweep all the way from 1MHz to 12GHz. | ||
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- | But a cheaper, and often more effective method, is to listen for interference using a shortwave receiver. Unfortunately, | ||
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- | I see Amazon sells a lot of ferrite cores. How do these help?</ | ||
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- | [[http:// | ||
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- | The problem is that we can't measure Capacitive Waves, and they cannot be easily picked up on normal radio receivers. At normal bioeffect levels, our 27MHz CWS system cannot be heard in a radio on the opposite side of a room. The " | ||
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- | Reading: | ||
- | Sacco and Tomilin: [[http:// | ||
- | Tomilin on waves : [[http:// | ||
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- | ===== Exactly where is it coming from? ===== | ||
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- | Here is an interesting monograph from a German physician about her perception of an increase in illness perhaps due to DECT phone and Cell phone systems. | ||
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- | Dr. Christine Aschermann: | ||
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- | We have a DECT-6 phone system, and the base unit is putting out frequent bursts of approx -30dBm energy. Which is higher than the WiFi I was complaining about in the Alaska Airlines aircraft, so, IMO, far too high a level. Its energy is centered in the 1920-1930MHz band, near the 3G cellphones, and not far from the 2440MHz used by WiFi and Bluetooth.</ | ||
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- | My feeling at the moment, for my level of sensitivity, | ||
- | Solar and atmospheric radiation: not much you can do about this stuff. | ||
- | -60db or less: not much you can do about this stuff. | ||
- | -50dB is start of perception for me | ||
- | -30dB is a real problem | ||
- | above that, well, the Russian safety level is around -15dBm, and their scientists know a lot more about RF-bioeffect than I do... I do know that -20dB from standing in front of the microwave has been making me perceptibly ill - slow, headachy, hard-to-pin-down-stuff. Last week I was thinking that the caffeine from too many cups of tea was causing me problems - then I realized it was standing in front of the microwave, while the water boiled, which was messing me up. | ||
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- | We are all on a journey of discovery right now. Some members will not be sensitive to EMF. </ | ||
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- | [[http:// | ||
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- | You need this 3G combo version, with the 15-2700 MHz wideband section, as well as the 220-960 that works a little better on Smart Meter radiation. | ||
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- | Here is the website of the designer: [[http:// | ||
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- | This is an open-source project. Both the firmware and the interfaces to your Desktop software are open-source community based projects. The hardware is built by Seeed studio in China. | ||
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- | There have been rumors that a new version with a 6GHz upper frequency limit will be released within a few months, but 2700MHz covers all the cell-phone 4G allocations | ||
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- | 474,598 MHz, -45dB | ||
- | 477.767 MHz, -46.5 dB | ||
- | 512 MHz, -49 dB | ||
- | 515.633 MHz, -44.5 dB | ||
- | 528.483 MHz, -47 dB | ||
- | 601.383 MHz, -48.5 dB | ||
- | 604.553 MHz, -45.5 dB | ||
- | 645.758 MHz, -54 dB | ||
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- | They had me on the top floor this trip and it looks like there was a 4G antenna right over my head. Also, about a block away, I spotted a huge base station with a array of antennas. | ||
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- | I don't think there will be any safe place for me to stay in downtown New Orleans - just too congested. But the more I use CWS, the more I become aware of how sensitive I am to EMF. Perhaps I might need to reevaluate my ability to travel at all for the time being. | ||
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- | > any microwave ovens (and any close through a neighboring wall) | ||
- | > DECT (wireless) home phones | ||
- | > any wireless internet routers | ||
- | > any cell phone towers close by | ||
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- | There are measures you can take without a meter: | ||
- | > change out any CFLs | ||
- | > remove any halogen lamps | ||
- | > unplug all electronics on the circuit that feeds electricity to your bedroom | ||
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- | If we can do the best we can to clean up things in the area where we sleep/ | ||
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- | If we can protect our heads (brains/ | ||
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- | Then we will begin to learn to discern from our own body responses</ | ||
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- | I am looking into EMF meters and such, so after tax season we might have some new suggestions on measuring and assessing the level of risk. | ||
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- | Liz and I just stapled 1/2" wire mesh over the fence between our bedroom and the neighbor with the DECT phone which floods our house with signal. The wire mesh effectively goes about 8ft high, yet only cuts 10dB to 15dB of signal (which is nevertheless a welcome drop</ | ||
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- | BASEMENT: -64dBm (sniffer silent even on sensitive setting) | ||
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- | 1st Floor BATHROOM -64dBm (sniffer silent) | ||
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- | 1st Floor BEDROOM -50dBm (sniffer slow beep) | ||
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- | 2nd Floor OFFICE by DESK -30dBM (sniffer moderate beep) | ||
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- | 2nd Floor OFFICE by COMPUTER -10dBm (sniffer high w/red light flashing by router despite turning off WiFi from Verizon and wrapping router in metal mesh cage and wrapping the cage in two layers of tin foil). | ||
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- | ===== Cars ===== | ||
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- | The problem with shielding in automobiles is that a very significant source of incoming radiation is from the " | ||
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- | A sniffer will not sense either 24GHz or newer 76GHz radars at all. Nada. Neither will your Cornet. But the waves are there. Everywhere there are newish cars. Radiating from front, back and sides of the vehicles. The incident power levels on your face both from oncoming drivers, and the from the car you are tail-gating, | ||
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- | Indeed, ignoring solid metal sheets and the inflexible yShield ' | ||
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- | First attempt - a ' | ||
- | [[https:// | ||
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- | Buying a face mask from Amazon, I used small pieces of gaffer tape to stick the film over the plastic cover of the mask. The problem is that the shielding film does not stretch, so I elected not to try and glue it to the mask's plastic and try to force it into a curve. | ||
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- | once a small blower fan is hung around my neck on 2mm elastic (fan is powered by the 12V car adapter) then my brain doesn' | ||
- | [[https:// | ||
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- | ==== Easily packed ==== | ||
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- | I needed something which will pack easily in a carry-on roller-case. What I came up with also shields much better than the face mask. | ||
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- | [[https:// | ||
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- | Here is a view from the side | ||
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- | [[https:// | ||
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- | And the dimensions are shown on a background of one inch squares (measure your head circumference and test the sizing with a sheet of paper before cutting the plastic) | ||
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- | You will note that there is small cutout for the shoulders to allow the front to drop a little lower and protect more of that important neck area. You will also note that it folds flat along the seams sealed by the copper tape.The metal tape is not important, it needs no conductive adhesive. I put the protective plastic covering side of the film on the outside of the tube so that my nose will rub on the stronger polycarbonate/ | ||
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- | With the blower fan (obligatory) this tube works really well indeed, giving shielding to the brain and brain-stem (upper neck) from all directions. OK, so I look like a dork - who cares, I am free to comfortably travel long distances again | ||
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- | BMW started to use RF-reflecting films on their car windows about 15 years ago. There were so many complaints from people who found their cell phones didn't work inside their cars that the protective coatings were left behind as the years have rolled by. | ||
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- | If your state allows windows to be tinted then go for it, I would do them all. The Safe Living Technologies film is good for 35dB, and 78% light transmission, | ||
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- | Here in California there is nothing allowed on the front window, the primary culprit... | ||
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- | ===== Neighbours ===== | ||
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- | From: Prof Trevor Marshall | ||
- | Date: 2015-02-09 17:41:12 | ||
- | Reply: http:// | ||
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- | Sherry, you might be careful of the ISP's router, too. I just noticed that Verizon had switched back on the WiFi on my FIOS router. | ||
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- | I am looking into EMF meters and such, so after tax season we might have some new suggestions on measuring and assessing the level of risk. | ||
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- | If you look at the WiFi screenshot from the WiFi analyzer you can see it covers from -20dBm at the top to -100dBm at the bottom, a range of 80dB, or 10**8 (which is 100000000: | ||
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- | Generally your WiFi and cellphone will get a good signal below -74dBm, and humans will get affected above -74dBm. Some higher, some lower, of course, and some not affected at all. So -74dBm is the sweet spot, at least based on what we know so far. None of us has managed to get background levels down that far yet. I am hoping that when I paint a room with conductive paint on walls and ceiling (the floor is a concrete slab) I should be able to achieve -75dBm. That is a work in progress. | ||
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- | Liz and I just stapled 1/2" wire mesh over the fence between our bedroom and the neighbor with the DECT phone which floods our house with signal. The wire mesh effectively goes about 8ft high, yet only cuts 10dB to 15dB of signal (which is nevertheless a welcome drop :) ) | ||
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- | - Trevor Marshall | ||
- | </ | ||
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- | === Local === | ||
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- | ===== Notes and comments ===== |