What does '73' mean and why do ham radio operators say it?
Amateur Radio Abbreviations and Jargon - SARCNET
The Xiegu G90 VS. KN990 (The Meme Radio) Ham Radio Showdown - YouTube
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Ham Radio - QRP: CW Abbreviations
What Does 73 Mean in Ham Radio? - Ham Radio Codes
73 Magazine (June 1996) : Free Download, Borrow, and Streaming : Internet Archive
When the Internet and Cell Phone Networks Go Down, Amateur Radio Operators Step Up
Ham Radio Terminology - TurboFuture
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RT-73, GD-88 Manual Enter Talkgroup - YouTube
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