---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Tue 01/27/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:45 AM - Re: AAE Antennas (TELEDYNMCS@aol.com) ________________________________ Message 1 _____________________________________ Time: 04:45:57 AM PST US From: TELEDYNMCS@aol.com Subject: Europa-List: Re: AAE Antennas In a message dated 1/27/2009 3:06:40 A.M. Eastern Standard Time, europa-list@matronics.com writes: Most transponders have a peak power of up to 250 watts not two Kilowatts. Hey Tim, You are correct here. I misread the spec's on the data sheet. Peak power, as listed for my Garmin and for a Narco that I have in another aircraft is indeed 250 watts as you state. I misread the specifications under the transmitter portion, but didn't catch that they were speaking about peak ERP for a particular type of antenna for these transponders. That's what I get for trying to discuss technical issues before my morning coffee. Again, there are indeed a host of other things that are higher on the list in terms of safety. I wholeheartedly agree. However, I maintain that unnecessary RF exposure at this power level is not something to ignore. I have two friends who have sustained serious eye damage, one of which is legally blind, because they did not heed the warnings when aiming antennas while attempting to achieve moon bounce at similar power levels. This eye damage was sustained from brief, but repeated encounters with the signal radiating from the back lobe of an antenna where the signal level was some 60 dB down from the primary lobe. Once your retinas are damaged, that it. I'm not trying to scare anyone, I just want to make them aware of the potential danger of repeated, close up exposure to this level of RF. From my experience most people are not aware that retinas can be damaged from RF exposure. I'm very cautious around RF because I work around it regularly and have for over 20 years. I've seen first hand what it can do to people. To each his own, I suppose. BTW, the childbearing comment was meant as a joke, but it is well established that repeated exposure to RF does indeed reduce sperm count. As I have said here numerous times before, if you place your antenna at least two wave lengths away from your person you will reduce your exposure by 96%. Two wave lengths at 1090 Mhz is, as you say, about 22" or 60 cm. Regards, John Lawton Whitwell, TN (TN89) N245E - Flying **************A Good Credit Score is 700 or Above. See yours in just 2 easy steps! cemailfooterNO62) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.