Natural, Scientific and Medical Wonders
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Showing posts with label
BFO
.
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Showing posts with label
BFO
.
Show all posts
Wednesday, March 4, 2009
Beat Frequency Oscillator gave license!
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In 1980s, I used to listen to the conversations of Amateur Radio Operators ( HAMs ) as a Short Wave Listener ( SWL ), after tuning in 40 ...
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