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Ian Poole   Written by Ian Poole .
  Experienced electronics engineer and author.








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21 September 2026

Fact of the day: It was on this day in 1905 that patent number 24 850 was granted to Ambrose Fleming for the invention of his diode or "oscillation" valve. He filed the patent in November 1904.

Quote: Science is what you know. Philosophy is what you don\'t know. Bertrand Russell

Point to ponder: There is 300 times as much gold in a kilo of smartphones than there is in a kilo of prime gold ore.




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How a Crystal Radio Set Works
 
Don\'t Buy a Morse Key Until You See This: Xiegu VK6 Tested
 



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▶︎ Morse Key Development & History
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