Thursday, December 23, 2010

470 Amateur Radio Net Trivia

I learned a couple of things tonight during the trivia part of the 470 Amateur Radio Net.

Before there was SOS and Mayday, ham radio operators used "CQD" to indicate a distress call. "CQ" is used as general call for making a contact - appending the "D" indicated danger or distress.

Spark Gap Transmitters were used as digital communication before CW.

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