Amateur radio
Amateur radio (also called ham radio) is the use of designated radio frequency spectra for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training,...
Amateur radio - Wikipedia
How Sun-Watchers Stopped World War III In 1967
As the Great Storm of 1967 interrupted radio and radar communications, scientists and military leaders scrambled to decipher the cause.
Amazing Resonance Experiment!
So this experiment is the Chladni plate experiment. I used a tone generator, a wave driver (speaker) and a metal plate attached to the speaker.
NPR Interview With Clinton Emerges: ‘My Roots Are Conservative, I’m Proud I Was A Goldwater Girl’
A 1996 NPR interview with Hillary Clinton has recently resurfaced, in which the current Democratic front-runner shockingly embraced conservatism and reiterated how proud she was to support a segregati...
Woz Comes Out For Bernie Sanders
Technically Incorrect: Apple co-founder Steve Wozniak tweets his dislike of both Republicans and Democrats and his support for the self-described socialist. Perhaps the two enjoy a spiritual kinship. ...
Jerry Lawson, a self-taught engineer, gave us video game cartridges
To celebrate Black History Month, Engadget is running a series of profiles honoring African-American pioneers in the world of science and technology. Tod
Near field communication - The Next Great Payment Revolution
Granted, you may not be familiar with the term ‘NFC’ yet — but mark my words, the technology behind these three letters is about take the world by storm…
I band
Christmas music using borrowed iPhones and iPads at North Point Community Church. Download more free music from North Point -- www.northpointmusic.org/christmas.
Marlon Brando
Sacheen Littlefeather refusing to accept the Best Actor Oscar® on behalf of Marlon Brando for his performance in The Godfather - the 45th Annual Academy Aw...
Chet Atkins
Click here http://tiny.cc/37bh1w for Free Guitar Lesson Chet Atkins plays Don Mcleans wonderful song Vincent.
Resonance
oscillating a wine glass by playing sound at its resonance frequency.
Amateur Radio Direction Finding
IIT Kanpur Techkriti 2010 Fox Hunt; Glimpses. Fox hunt anti racial humanist animal lover song courtesy: Yutube user: saldons http://www.youtube.com/watch?v=l...
History of amateur radio
Throughout the history of amateur radio, amateur radio enthusiasts have made significant contributions to science, engineering, industry, and social services. Research by amateur radio operators has f...
History of amateur radio - Wikipedia
Vintage amateur radio
Vintage amateur radio is a subset of amateur radio activity, considered a form of nostalgia or hobby much like antique car collecting, where enthusiasts collect, restore, preserve, build, and operate ...
Antenna (radio)
An antenna (or aerial) is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio...
Modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains i...
Modulation - Wikipedia
Earth-Ionosphere waveguide
The Earth–ionosphere waveguide refers to the phenomenon in which certain radio waves can propagate in the space between the ground and the boundary of the ionosphere.Because the ionosphere contains ch...
Amateur radio station
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator. Radio amateurs build and operate several types of amateu...
Amateur radio station - Wikipedia
Call sign
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitting ...
Amateur radio bands
Amateur radio frequency allocation is done by national telecommunications authorities. Globally, the International Telecommunication Union (ITU) oversees how much radio spectrum is set aside for amat...