Vacuum+Tube

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=Vacuum Tube Generation= =Invention: Vacuum Tube=
 * Date: Made in 1904 and was done in 1960s**


 * Description: Vacuum tube can convert an alternating current signal into a direct signal.**


 * Bibliography: ** http://www.vacuumtubes.net/How_Vacuum_Tubes_Work.htm

=**Inventor: Ambrose Fleming and Lee de Forest**=


 * Birth Date - Death Date: Ambrose: 1849-1945 Lee: 1873-1961**
 * Birth Place: Ambrose: Lancaster Lee: Alabama**


 * Brief biography: Ambrose Fleming was born in Lancaster in 1849. In 1904, he created a vacuum tube. Lee De Forest invented the Audion, a vacuum tube that relatively weak electrical signals and amplifies them **

http://www.radio-electronics.com/info/radio_history/gtnames/ambrose-fleming-facts-quotes.php http://www.pbs.org/transistor/album1/addlbios/deforest.html
 * Bibliography: **