Society Marks 100th Anniversary of Electronics:

The AVS Science & Technology Society this week marked the 100th anniversary of electronics during its 51st International Symposium and Exhibition through November 14-19 in Anaheim, California. The Society considers November 16, 1904, the start of the electronic age. On that date, British scientist John Ambrose Fleming applied for a Britsh patent for his invention of the first practical electronic device--the thermionic diode, also known as the "Fleming valve." Fleming discovered that his simple vacuum tube, containing only two electrodes--a cathode and a plate--could convert alternating current to direct current. His later research with the thermionic valve was important to the development of radio. A special AVS symposium session November 16 celebrated Fleming's seminal invention and the subsequent evolution of electronic components based on vacuum devices.--submitted by William Ricker, N1VUX

Source:

The ARRL Letter Vol. 23, No. 46 November 19, 2004

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