Your RF Cafe
1884: Transparent paper-strip photographic film was patented by George Eastman. 1908: George Brown, who developed the turnstile TV antenna, and the vestigial sideband filter, was born. 1923: Xilinx co-founder Bernard Vonderschmitt was born. 1947: Chuck Yeager became the first human to fly faster than the speed of sound in the rocket powered Bell XS-1 over Murac Dry Lake, CA. 1960: The 4th legal definition of the meter was made to be 1,650,763.73 wavelengths in vacuum of the orange-red light radiation of the krypton-86 atom (transition between levels 2p10 and 5d5). 1984: Sir Martin Ryle, who developed the first synthetic aperture radio telescope systems, died. 1996: The Dow Jones Industrial Average (DJIA) closed above 6,000 for the first time. 1997: British Royal Air Force pilot Andy Green broke the land-speed record by driving a jet-powered car faster than the speed of sound. 2001: NASA's Galileo spacecraft passed within 112 miles of Jupiter's moon Io. 2004: The FCC adopted rules for broadband over power lines (BPL). 2010: Benoit Mandelbrot, popularize of fractal geometry, was born.