ESPNâs latest attempt at a shake-up is more about a breakup. The Worldwide Leader in Sports is expected to assign longtime radio host Mike Greenberg to a new morning television show, according to Sports Illustrated, thus removing one âMikeâ from the popular ESPN Radio show âMike & Mikeâ that has run for over 18 years.
The first high-frequency transistor was the surface-barrier germanium transistor developed by Philco in 1953, capable of operating up to 60 MHz. These were made by etching depressions into an N-type germanium base from both sides with jets of Indium(III) sulfate until it was a few ten-thousandths of an inch thick.he transistor provides current gain, allowing a relatively large current in the collector to be switched by a much smaller current into the base terminal. The ratio of these currents varies depending on the type of transistor, and even for a particular type, varies depending on the collector current.
Thomas Alva Edison announced his invention of the first phonograph, a device for recording an â¦ d replaying sound, on November 21 1877 and he demonstrated the device for the first time on November 29 (it was patented on February 19 1878 as US Patent 200,521).he Dictaphone was still in use in the early 1950's. The first flat, circular record was invented in 1887 by Emile Berliner (1851-1929), a German-born American inventor, who also devised the gramophone to play his disks. Berliner's records were originally made of glass, then zinc, and later, hard rubber.