A hobby that blossomed after the sinking of the Titanic in 1912 has today become a key component of emergency communications, ...
Many of us tried the old “Two tin cans connected by a string” experiment as kids. [Michael Rainey, AA1TJ] never quite forgot it. Back in 2009, he built “El Silbo”, a ham radio transmitter powered ...
Well before the days of the tweet and the status update, people communicated with each other over sweeping distances by quite literally harnessing the earth's magnetic field to send messages via radio ...
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