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Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate.. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers.
King George V started the Royal Christmas Message as a radio broadcast in 1932, and it has remained an annual tradition ever since. In 1957, Queen Elizabeth II moved to the broadcast to television
This circuit is called a leading-edge dimmer or forward phase dimming. Waveform of the output voltage of a thyristor dimmer set for 60 volts RMS output, with 120 V input. The red trace shows the output device switching on about 5.5 ms after the input (blue) voltage crosses zero.
The Fifth Horseman (1946, NBC, Summer short-run series of eight special half-hour weekly episodes), Rare and obscure early post-World War II anti-nuclear radio docudrama serial [5] Fireside chats (1933–1944) The Firefighters (quarter hour children's radio show) The First Nighter Program (1930–1953) The Five Mysteries Program
The miniature RK61/2 thyratron marketed in 1938 was designed specifically to operate like a vacuum triode below its ignition voltage, allowing it to amplify analog signals as a self-quenching superregenerative detector in radio control receivers, [6] and was the major technical development which led to the wartime development of radio ...
Jahmyr Gibbs stirred up a controversy by posting a photo that contained info on the Lions' protection calls, but Dan Campbell isn't sweating it.
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