Guest guest Posted February 2, 2005 Report Share Posted February 2, 2005 > These thyristors have the property that when they are switched on, they > immediately - within a few millionths of a second - deliver the entire power to the > load. Which in turn causes a short but very intense radio frequency transient. Yes, dimmer switches are nasty. I think the same problem occurs with fluorescent lights, which are also turned on & off at a rapid rate. Marc Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 2, 2005 Report Share Posted February 2, 2005 Hi All You might find this web site interesting: http://www.stetzerelectric.com/filters/research/ There are a number of papers on this page concering the problems from dirty power. They also have a meter to measure how bad the problem is and filters to remove the problem. I bought the meter and had readings as high as 800. I got the filters and now have readings ranging from 20 to 60. Yes, I can tell the difference. You are right about the dimmer switches. You can see it on the meter even with the filters installed. Fluorescent lights are not as bad on the meter as long as the ballast is good. If the light flickers then all bets are off. I do notice on the TriField meter the magnetic field near a fluorescent light can be very high. If they are high enough up you are away from it though probably still not good for you. Bill E > > These thyristors have the property that when they are switched on, they > > immediately - within a few millionths of a second - deliver the entire power to the > > load. Which in turn causes a short but very intense radio frequency transient. > > Yes, dimmer switches are nasty. I think the same problem occurs with > fluorescent lights, which are also turned on & off at a rapid rate. > > Marc Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 3, 2005 Report Share Posted February 3, 2005 > I bought the meter and had readings as high as 800. I got > the filters and now have readings ranging from 20 to 60. Thanks for that info -- we haven't had too many people report on the Stezter filters... the only report I've ever heard before was a negative report from someone who ended up returning them. I had been meaning to purchase the meter to run some experiments, but had forgotten. Thanks for reminding me (now ordered!). I also just ordered *one* Stezter filter so I can take a look at it. I've tried other types of noise suppressing filters before, and found them extremely agitating. I'm suspecting that while they suppress frequencies in certain ranges, they also add noise harmonics in other ranges in the process (I note that the Stetzer filters say they work best in the 4-100 khz range). Even though they recommend 20 for an entire house, I'm sure that I'll be able to tell if they're agitating with just one... (the advantage of being sensitive). Marc Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 3, 2005 Report Share Posted February 3, 2005 I asked them also some questions. But got no answers yet. >that the Stetzer filters say they work best in the 4-100 khz range That is something special. I have this Endotronic VLF or HAARP Detektor, which measures from 5 kHz - 30 kHz, and from 30 kHz - 150 kHz. I also found some disturbing sources, even on telephones with wires!! See the MP3 samples on my website. So this frequency range can have distressing effects on electrosensibles. See page 15 from *het bitje* October 2004. Greetings, Claessens member Verband Baubiologie www.milieuziektes.nl www.hetbitje.nl checked by Norton Antivirus Re: Re: emf info > > > I bought the meter and had readings as high as 800. I got > > the filters and now have readings ranging from 20 to 60. > > Thanks for that info -- we haven't had too many people report > on the Stezter filters... the only report I've ever heard > before was a negative report from someone who ended up > returning them. > > I had been meaning to purchase the meter to run some > experiments, but had forgotten. Thanks for reminding me > (now ordered!). > > I also just ordered *one* Stezter filter so I can take a > look at it. I've tried other types of noise suppressing > filters before, and found them extremely agitating. I'm > suspecting that while they suppress frequencies in certain > ranges, they also add noise harmonics in other ranges in > the process (I note that the Stetzer filters say they > work best in the 4-100 khz range). Even though they > recommend 20 for an entire house, I'm sure that I'll be > able to tell if they're agitating with just one... > (the advantage of being sensitive). > > Marc > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 23, 2010 Report Share Posted June 23, 2010 From another list. I cannot guarantee. Sounds like good info. We'd like to measure & block what we can. Kathy http://www.emfacts.com/weblog/?p=1096 * Alasdair Philips, an expert who warns about the harmful effects of EMF's and invented the electrosmog detector, is skeptical about BioPro and other devices. You can read his column here:http://www.powerwatch.org.uk/columns/aphilips/index.asp#16 * The radiation research site, which also warns about EMF's, also once put up a warning about such devices as well, but it's been removed: http://www.radiationresearch.org/ After reading what experts say, they decided to try things that can be measured by meters to block EMF's, like shielding materials. * Regarding Trifield meter, it is great for 50/60Hz power line EMF's. However, the wireless measurement option on it is not sensitive enough. (The person writing this) was working near a cell tower and Trifield didn't pick up the waves where they sat, even though they were significant, but another meter did). * For wireless radiation (RF-EMF), I use the Cornet meter which is available at lessemf.com (8 GHz Basic RF Meter). * Intermediate between power line EMF's and RF are the intermediate frequencies on power lines that you can measure with the Stetzerizer meter, also available at lessemf.com If you're looking into shielding materials, the ones offered by lessemf are expensive. (The person has discovered some cheaper alternatives). Best policy is avoidance. One should also unplug cordless phones and Wi-Fi. Useful papers on Wi-Fi: * http://www.emfacts.com/wifi/WiFi_A4_print.pdf * http://www.powerwatch.org.uk/pdfs/20091005_hhl_wifi.pdf Useful papers on cordless phones: * http://www.electricalpollution.com/documents/08_Havas_EPetition_DECT.pdf (Petition by Magda Havas) * http://www.tetrawatch.net/papers/non-stop_dect.pdf (Explains that DECT isnon-stop) Note that prior models of cordless phones were only radiating during usage. However, the DECT model is non-stop. Quote Link to comment Share on other sites More sharing options...
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