PENTODE

Pentode

A pentode is an electronic device having five active electrodes. The term most commonly applies to a three-grid amplifying vacuum tube, which was invented by the Dutchman Bernhard D.H. Tellegen in 1926. The pentode consists of an evacuated glass envelope containing five electrodes in this order: a cathode heated by a filament, a control grid, a screen grid, a suppressor grid, and a plate . The pentode was developed from the tetrode tube by the addition of a third grid, the suppressor grid. This served to prevent secondary emission electrons emitted by the plate from reaching the screen grid, which caused instability and ...

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pentode

Noun

  1. a thermionic valve similar to a tetrode with the addition of a suppressor grid; was used in high quality audio and radio products


The above text is a snippet from Wiktionary: pentode
and as such is available under the Creative Commons Attribution/Share-Alike License.

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