Quoting Geoffrey S. Mendelson, from the post of Thu, 25 Aug: > in BPL (broadband over power lines). BPL disrupts all communication in > HF and low band VHF. This will put an end to international amateur > radio, shortwave brodcasts, long range (beyond 5-10 miles) emergency > communication, CB's, some cordless phones, low band VHF TV, etc.
I need to go read about it then, because last I heard, our own IEC has been using their power lines for telecom for several years now, and the only reaosn they don't connect homes to it is the Nezeq monopoly issues... so which will it be? > Most countries that have tried it have decided not to allow it. got a reliable source for that? > For example, a clear frequency in California could be in use by aircraft > over the Atlantic and a BPL signal transmitted using an antenna several > miles long, such as a power line could prevent them from getting > assistance they need when they land. It could quite possibly be the > difference between life and death. it doesn't matter if the power line goes through the most deserted corner of the country, if it creates disturbances beyond FCC regulations, it's illegal, and no matter if it is aircraft frequency or walky talky. > Or for example, a signal on an unused frequency in the U.S. may be a > shortwave broadcast frequency elsewhere in the world. A test engineer at > a BPL site using a portable radio would hear nothing, while the BPL > signal might prevent someone from hearing the news, or in a totalitarian > country the truth. well, short waves (and ham radio) use frequencies that are globally reserved and disturbing them is also quite possibly an international treaty infringement AND an FCC violation (as well as other local rediao regulation agencies), so again, it would no be an acceptable technology. The solution is of course to change frequencies... > There is a type of amateur radio operators, called QRP'ers, that > communicate around the world using less power than BPL uses. They use > significantly smaller antennas. antenae sizes don't set the power. > Gordon West, WB6NOA, a popular author of amateur radio learning guides > and magazine articles once was testing a transmitter using a LIGHT BULB > as the antenna. Someone 3,000 miles away replied to him and they had a > conversation. Imagine the result if he had had antenna several miles > long. unless he would have been transmitting with an extremely hi-power AM transmitter at extremely low frequencies (a few dozen kilohertz) there's little that kind on an antena could help him. -- The secret ingredient is banality Ira Abramov http://ira.abramov.org/email/ ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
