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DXER Ham Radio DX News

The latest dx news/current propagation and more. Visit mike's Amateur Radio Page at www.qsl.net/swlham

Saturday, April 21, 2018

John Lindsey: Discovery of Radio Waves Eventually Gives Rise to Hams:

eHam.net News – In a burst of brilliance in 1864, James Maxwell theorized that electromagnetic — radio and light — waves could travel through free space without the mythical “ether” or “quintessence.” A few years later, Heinrich Rudolf Hertz — the unit of cycles per second is named for him — was able to prove electromagnetic waves could propagate through free space, which confirmed Maxwell’s theory of electromagnetism. In fact, for many years radio waves were called Hertzian waves. “Radio” is not an acronym or hyphenation but is derived from the word “radiation” or “to radiate.” Waldo Warren coined the word and it was adopted by the U.S. Navy in 1912. You see, the electromagnetic spectrum contains radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays and Gamma rays. Those are all forms of electromagnetic radiation. The waves travel in interesting ways across our sky, in outer space and even into the earth and oceans. Since the early 1900s, no other group has made a greater contribution to radio communications than our treasured amateur or so-called ham radio operators. Even though they are licensed by the Federal Communications Commission, they are called amateur radio operators because the FCC has set aside certain noncommercial radio frequencies for their utilization. Amateur radio operators have a distinguished history of public service as well as emergency communications.

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