In Saint Petersburg OTD in 1895, Alexander Stepanovich Popov demonstrated his invention, the Popov lightning detector, a primitive #radio receiverhttps://cromwell-intl.com/radio/hfqrp.html?s=tweetbot …
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In Saint Petersburg OTD in 1895, Alexander Stepanovich Popov demonstrated his invention, the Popov lightning detector, a primitive #radio receiverhttps://cromwell-intl.com/radio/hfqrp.html?s=tweetbot …