Wiktionary
n. (radio amateur English)
Usage examples of "radio amateurs".
It was Morse code for Hi, the universal greeting of radio amateurs.
Except that we licensed radio amateurs, especially those of us who prefer Morse code CW to voice transmissions, use what is known as the International Q-Code.
After a few weeks of listening to radio amateurs all around the world ragchewing via short waves, you'll get an urge to join the fun.
A telescoping-type tower in common use among radio amateurs world-wide.
It must be two radio amateurs that went to keep off the visual circuits.
The ionosphere is electrically conductive, and radio amateurs and others in radio communication, have 'bounced' signals off of the ionosphere for decades in order to achieve longer distance communication around the planet that could not be possible because of the tendency of radio signals to propagate in line-of-sight (and the planet's a sphere).