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 ...

Using various frequencies of radio transmitters - and today even computer networks - "hams" can talk to their neighbors down the road or friends and strangers on the other side of the world. And, ...

The tragic events of Sept. 11, 2001, and Hurricane Katrina in 2005 highlighted two phenomena common in disasters: Network communications tower sites were destroyed, and network traffic overwhelmed ...

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 ...