This article is intended to introduce the beginner to the interesting and challenging art of high frequency radio design. It is also intended to entice the seasoned professional to take a deeper look ...

Ham radio operators are sounding the alarm over the latest threat to their beloved hobby—and this time, it is coming from Wall Street. A group of high-frequency trading firms is asking the Federal ...

Get the latest federal technology news delivered to your inbox. The Department of Veterans Affairs plans to build a nationwide high-frequency radio network to connect its medical facilities in case of ...

FORT HUACHUCA, Ariz. - The U.S. Army's battlespace has long benefited from the use of wireless communications for over 100 years. In fact, it was here in the Southwestern states of Arizona, New Mexico ...

Amateur radio is the only hobby that offers its licensed operators the chance to legally design, build, and operate high power radio transceivers connected to unlimited antenna arrays for the purpose ...

Frequency selective levelmeters, also known as frequency selective voltmeters, are commercially-built receivers used in the power utility industry for maintenance and troubleshooting. They have been ...

As discussed in Part 1 of this series, as the frequency of a single or coupled tuned circuits is increased, the selectivity decreases to the point that there may be insufficient selectivity at the ...

A comprehensive and intelligent approach to cyber-attacks and cyber-crime is critical to the successful mitigation of all possible issues that may be caused by potential bad actors Most emergency ...

Numerous commenters have told the FCC that a proposal to “modernize” the shortwave band is a threat to amateur radio operators in the United States and possibly the end of ham radio as we know it. And ...

WASHINGTON (Army News Service, Sept. 30, 2014) -- Volunteers from MARS are helping the Army improve its communications capabilities. They aren't little green Martians from science fiction novels, ...

Rick Bressler leaned over a laptop with flashing radio frequencies and a list of communications with far-flung countries — Wales, Bosnia-Herzegovina and dozens of others — his ham radio setup in ...