The NW7US Beacon
RSSThis is a demonstration that I created of the digital mode, “JT65A”, which is designed for use on the shortwave (High Frequency, or HF) amateur radio bands. JT65A is a “contact” protocol rather than a conversational protocol. This video shows me making a single contact on shortwave.
Please visit the following website for complete details on the protocol and how to use the mode:
Watch it now: an hour-long exploration of our Sun — you know, that star that I am so passionate about.
The Sun contains 99.9 percent of all the matter in our solar system. It sheds hot plasma at nearly a million miles per hour. The temperature at its core is a staggering 27 million degrees Fahrenheit. It convulses, it blazes, it sings. You know it as the Sun.
Scientists know it as one of the most amazing physics laboratories in the universe. Now, with the help of new spacecraft and Earth-based telescopes, scientists are seeing the Sun as they never have before and even recreating what happens at its very center in labs here on Earth. Their work will help us understand aspects of the Sun that have puzzled scientists for decades. But more critically, it may help us predict and track solar storms that have the power to zap our power grid, shut down telecommunications, and ground global air travel for days, weeks, or even longer. Such storms have happened before—but never in the modern era of satellite communication. “Secrets of the Sun” by NOVA PBS reveals a bright new dawn in our understanding of our nearest star—one that might help keep our planet from going dark.
Please visit: http://SunSpotWatch.com
If you really like it, please purchase the DVD so you can have your own HD copy. Here’s the purchase link: http://www.pbs.org/wgbh/nova/space/secrets-sun.html
(I don’t make any money off of this. I just support PBS).
(Source: sunspotwatch.com)
Happy Birthday, Samuel F.B. Morse!
We have a birthday anniversary, today! Samuel Finley Breese Morse (April 27, 1791 – April 2, 1872) was an American contributor to the invention of a single-wire telegraph system based on European telegraphs, co-inventor of the Morse code, and an accomplished painter. Samuel F. B. Morse was born in Charlestown, Massachusetts, the first child of the pastor Jedidiah Morse (1761–1826)—who was also a geographer—and Elizabeth Ann Finley Breese (1766–1828).
Samuel was a student at Yale College. During his time there, he became interested in both painting and electricity (the new area of science that was just emerging on the scene). After Morse graduated in 1810, he concentrated on painting. He become a well-known portrait artist.
In 1825, the city of New York commissioned Morse for $1,000 to paint a portrait of Gilbert du Motier, marquis de Lafayette, in Washington. While Morse was painting, a horse messenger delivered a letter from his father that read one line, “Your dear wife is convalescent.” Morse immediately left Washington for his home at New Haven, leaving the portrait of Lafayette unfinished. By the time he arrived, his wife had already been buried. Heartbroken in the knowledge that for days he was unaware of his wife’s failing health and her lonely death, he moved on from painting to pursue a means of rapid long distance communication.
On the sea voyage home in 1832, Morse encountered Charles Thomas Jackson of Boston, a man who was well schooled in electromagnetism. Witnessing various experiments with Jackson’s electromagnet, Morse developed the concept of a single-wire telegraph, and The Gallery of the Louvre was set aside. The original Morse telegraph, submitted with his patent application, is part of the collections of the National Museum of American History at the Smithsonian Institution. In time the Morse code would become the primary language of telegraphy in the world, and is still the standard for rhythmic transmission of data.
Samuel Morse received a patent for the telegraph in 1847. The “International Morse Code” is now in use by various services, including amateur radio (Ham radio).
More information on Mr. Morse is at the Wiki: http://en.wikipedia.org/wiki/Samuel_Morse
Drugstore.com Issues Apology After Sending Cats Instead of Medicine
Internet pharmacy and household goods retailer Drugstore.com has issued a formal apology after reportedly sending at least three customers boxed cats instead of the medicines that had been ordered. ”We sincerely regret our error,” read the statement from the company, “and we plan to offer the affected customers full refunds, as well as gift certificates equal to the purchase amount.”
There is no truth to the rumor, however, that the kitties had been mistakenly sent to cat dander allergy sufferers ordering Claritin.
Via cseeman.
This is an excellent video that shows the Doppler influence on radio propagation via the ionosphere… very informative!
(Source: youtube.com)
Imagine running your QRP (low-power) amateur radio transceiver, powered by this cool technology! This rocks!
(Source: g.nw7us.us)
About The NW7US Beacon
Follow @NW7US
