HFU HF Underground
General Category => General Radio Discussion => Topic started by: Rob. on January 27, 2020, 2108 UTC
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Enjoyable article with a bit of technical content:
https://www.radioworld.com/tech-and-gear/synchronous-ams-long-and-tortuous-history
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Very interesting, thanks for sharing!
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I am always amazed how much they could do with the technology they had in those early days of radio. Those engineers knew their stuff.