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TOPIC: Amateur radio

Blobrana

L

Posts: 131433

Date: Aug 13 23:02 2011

RE: Amateur radio	Permalink

On 14 August 1894, at a meeting of the British Association for the Advancement of Science at Oxford University, Sir Oliver Joseph Lodge, FRS gave a lecture on the work of Hertz (recently deceased) and transmitted radio signals to demonstrate their potential for communication. Read more __________________

Blobrana

L

Posts: 131433

Date: May 31 16:40 2010

Amateur Radio astronomy	Permalink

How to Bounce Amateur Radio Signals Off Meteors Radio astronomy does not necessarily require huge radio telescopes. Get your amateur radio operators license and an ordinary radio transceiver and you will enjoy radio astronomy at home by bouncing your signals off meteor trails. Whenever a meteor from outer space enters Earth's atmosphere, it leaves a temporary ionised trail across the sky. Just as radio signals are bounced against the much larger Ionosphere around our planet, so also are they bounced from the small ionised debris trails left by meteors as they decompose in our atmosphere. The transmission of radio waves by bouncing them off meteor trails is called Meteor Scatter Propagation. Some amateur radio operators take advantage of this phenomenon by using meteor trails to propagate signals between distant stations. Others listen to and record the radio sounds (pings) of passing meteors. Read more __________________

Blobrana

L

Posts: 131433

Date: Jan 12 21:20 2009

Amateur radio	Permalink

In a farmhouse damaged in 1913 by tornado, a bank of communications equipment surrounded Shelby Ennis as the Weather Channel played overhead. He is recruiting and training a net of amateur radio operators who, during times that are too urgent to worry about how many bars a cell phone has, will talk to the outside world through an old medium. "To most people it's a hobby, but by law it is a service" - Shelby Ennis. He recently was named emergency coordinator of the Hardin County Amateur Radio Service. These operators provide communications for agencies like the American Red Cross, sometimes when more recent technologies - and electricity - fail. Read more __________________

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