Generally good thinking. Commercial radio & TV radiating sources (antennas) are dangerous and in most cases are fenced -- to protect you as well as themselves. YES Radio and TV stations are licensed and one can assume are safe to be around their antenna providing you are not violating posted warnings and fences. This is not the case in Mexico. Also there are game/entertainment devices that radiate low levels that are safe to hold and use -- like that cell phone and Bluetooth are FCC approved as safe. There is some disagreement here regarding cell phones held close to the brain all day long.
I worry about the radio frequency radiation I might be getting from my microwave oven and do not stand close by. Ovens have gaskets that help but also get old -- and are not monitored my anyone as to leakage. There is always leakage but the distance 1-2 feet is safe --when the oven is new. These are high power devices and ironically it is the eyes that are hit by high leakage if a malfunction should occur. One can buy cheap microwave detectors to measure leakage. Also I would never buy a house under or less than 300 feet from big tower high voltage power lines. This issue is open, Good question. Tom (I hold FCC radiotelephone license, many years in broadcast transmitter/antenna business.) ----- Original Message ----- From: Matt Fanady To: SoCalFreeNet.org General Discussion List Sent: Thursday, August 20, 2009 3:49 PM Subject: Re: [SCFN] Cell phones and RF/microwave radiation are identicallycarcinogenic and genotoxic Its really only dangerous when you're up close, and even then, its not dangerous as in "its going to give you cancer" dangerous, the most vulnerable part of your body to high power high frequency RF is the cornea of your eyes. This is because RF generates heat when it comes into contact with organic material, the same way a microwave oven generates heat. The cornea lacks sufficient blood flow to carry this heat away, so they are the first thing to "cook". But this is only true when you're very close to the source, and even then, the risk is minimal. -M@ On Thu, Aug 20, 2009 at 3:34 PM, <[email protected]> wrote: Hi Bao. The cellular equipment you found is an example of a major RF transmitting facility under the jurisdiction of the FCC. Typical facilities include radio and television broadcast stations, satellite-earth stations, experimental radio stations and certain cellular, PCS and paging facilities. The warning sign you found helps define a keep-out area near the transmit antennas such that unknowing persons are protected. These facilities are required to undergo routine evaluation for RF compliance whenever an application is submitted to the FCC for construction or modification of a transmitting facility or renewal of a license. Failure to comply with the FCC's RF exposure guidelines could lead to the preparation of a formal Environmental Assessment, possible Environmental Impact Statement and eventual rejection of an application. Technical guidelines for evaluating compliance with the FCC RF safety requirements can be found in the FCC's OET Bulletin 65. In short, the keep-out areas provide a safe buffer away from strong transmitters. The cell transmissions from different nearby basestations are not really additive. They transmit in different bands, or on different channels within those bands. Hope this helps. Regards, Brian C. Gallagher RF Hardware Engineer Vehicle WLAN Development
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