My father-in-law worked in WWII in the Pacific as a trainer on the then-new radar systems. They too liked to warm themselves in the radiation. In later years he developed many eye problems and became legally blind, with the Veteran's Admin accepting that his service was responsible. He also tended to tell way too many WWII stories, but the VA would never provide treatment or accept responsibility for that.
Radar of course is in a way different power class than 802.11 or even cellular. Cheers, JTM _____ From: [email protected] [mailto:[email protected]] On Behalf Of Steve Shapery Sent: Saturday, August 22, 2009 11:19 AM To: 'SoCalFreeNet.org General Discussion List' Subject: Re: [SCFN] Cell phones and RF/microwave radiationare identicallycarcinogenic and genotoxic Cool, I got schooled. :-) Thanks for the info, Don. From: [email protected] [mailto:[email protected]] On Behalf Of donald johnson Sent: Saturday, August 22, 2009 10:39 AM To: SoCalFreeNet.org General Discussion List Subject: Re: [SCFN] Cell phones and RF/microwave radiation are identicallycarcinogenic and genotoxic Microwave cooking. interesting subject. When I was much younger I read about the soldiers that were standing watch at the DEW Line radars in Greenland. They loved to stand in front of the radars because they would get warmed up by the radar energy. As far as I know though no one was killed by this but I always wondered what their kids looked like. To get the wavelength of the emission you take 300 and divide the frequency into it. this will give you whe wavelength in meters. multiply that by 39.37 and that will give you the wavelength in inches. So 300/1900*39.37=6.21 inches not the 2 inches mentioned earlier. Any gap of more than 5% of a wavelength will allow some leakage. In fact any gap at all will leak BUT the amount is considered negligible until more than 5% of a wavelength. This is why many of the old UHF television antennas had a dish that was made up of a wire mesh. less metal to have to pay for and it picked up 95% of the signal. 5 % gap means that you need to have holes that are less than .31 inch in size at 1.9 GHZ cell phone frequency's, and about .29 inches at 2.4 GHz. this also means that if your door has more than a .3 inch gap in it that your oven (2.4GHZ) will also leak some. The door gaskets do have copper or aluminum in their construction so they are required to be complete and unbroken to work properly. If you do have a large gap or crack in the door gasket then get them repaired or replaced for 2 reasons. 1) Personal safety 2) Your wireless lan will not like the interference as the oven has 1000 watts and your lan has .1 or less and they are on nearly identical frequency's, close enough that they will and do jam wireless lans when someone is cooking something. I am a Ham Radio operator (WD6FWE) as well as an RF Engineer with a radiotelephone licience. Don Johnson --- On Thu, 8/20/09, Steve Shapery <[email protected]> wrote: From: Steve Shapery <[email protected]> Subject: Re: [SCFN] Cell phones and RF/microwave radiation are identicallycarcinogenic and genotoxic To: "'SoCalFreeNet.org General Discussion List'" <[email protected]> Date: Thursday, August 20, 2009, 6:18 PM When I worked for a certain unnamed ghetto cellular provider, we were forced to take RF Safety training. and we were issued badges similar to the ones used in nuclear power plants. Based on what we saw in the training, being up on a standard CDMA tower when it was hot (i.e. violating lock-out/tag-out laws) you could get a third-degree burn in a few seconds. Not something I'd want to mess around with, personally. However, this was cooking along around 100W, which is about 1,000 times more powerful than a decent access point will deliver. This BTW, is based on 1900Mhz technology, which should result in about 2" wavelengths, if my math is right. And Matt - based upon some quick research, it appears that most microwave ovens in the US run around 2450Mhz, which, as you said, results in a wave approx. 4 inches in size. So, unless you have a GAPING hole in your oven, you should be relatively safe. However, if you put a big antenna on your cordless phone... From: [email protected] [mailto:[email protected]] On Behalf Of Matt Fanady Sent: Thursday, August 20, 2009 5:26 PM To: SoCalFreeNet.org General Discussion List Subject: Re: [SCFN] Cell phones and RF/microwave radiation are identicallycarcinogenic and genotoxic While I am by no means an expert on the subject, it is my understanding that a microwave oven is always safe, unless there are large gaps. Seeing as how the wavelength of 2.4 GHz microwaves are measured in INCHES, there would have to be a rather significantly gaping hole in a microwave in order to let enough of these waves out to cause harm (or even significant interference). This is why you can have a clear plastic window on the oven door, with only the perforated metal screen between you and the radiation. The waves are simply too large to make it through these holes. The rubber seal around the door to the best of my knowledge performs no radiation containment function. -M@
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