Shortwave radio signals (3-30MHz) are highly susceptible to interference from power adapters, fluorescent or LED light ...

Radio transmission in the 1.7-30 MHz frequency range worldwide. Like AM radio, shortwave signals reflect back from the ionosphere and follow the curvature of the earth. As a result, shortwave (SW ...

With the push to having most of a radio receiver as part of a PC ... so we wondered if you could get the thing to work on other frequencies, too. Clearly, the Arduino portion would be easily ...

Intelligence agencies don’t trust the internet. Makes sense. Foreign agencies have been using shortwave radio frequencies to ...

has been a constant companion to anyone with a shortwave radio tuned to 4625 kHz. However, [Ringway Manchester] notes that there is now a second buzzer operating near in frequency to the original.