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Curated by: Kathy Loves Physics (123 videos)
Positive Feedback (or electrical regeneration) was created by Howard Armstrong in his parent's attic in 1912! But how did it work and why did he do it? This is a story of an influential children's book, a rule-breaking neighbor, a mentor with an inspirational past, and a very important coil of wire. Check it out! The music as usual was provided by the fabulous Kim Nalley The picture of the regenerative receiver behind me was courtesy of PV Scientific Instruments (http://www.arcsandsparks.com), which is a very cool place to buy all sorts of neat historical instruments. It's a fun place to window shop too! The video of Armstrong's niece (as well as the one of Armstrong in the tower) is from PBS's excellent documentary "Empire of the Air" which can be found here: https://www.youtube.com/watch?v=uhX1Hqr8sjo&t=1850s