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About: Dynatron oscillator     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: baseball leagueyago:WikicatVacuumTubesyago:WikicatOscillatorsyago:Artifact100021939yago:Device103183080yago:ElectronicDevice103277771yago:Generator103434285yago:Instrumentality103575240yago:Object100002684yago:Oscillator103857430yago:PhysicalEntity100001930yago:Tube104494204yago:Whole100003553 New Facet based on Instances of this Class

In electronics, the dynatron oscillator, invented in 1918 by Albert Hull at General Electric, is an obsolete vacuum tube electronic oscillator circuit which uses a negative resistance characteristic in early tetrode vacuum tubes, caused by a process called secondary emission. It was the first negative resistance vacuum tube oscillator. The dynatron oscillator circuit was used to a limited extent as beat frequency oscillators (BFOs), and local oscillators in vacuum tube radio receivers as well as in scientific and test equipment from the 1920s to the 1940s but became obsolete around World War 2 due to the variability of secondary emission in tubes.