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screen grid

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noun Electronics.
  1. a grid placed between the anode and the control electrode in a vacuum tube, usually maintained at a fixed positive potential.
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Origin of screen grid

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for screen grid

screen grid

noun
  1. electronics an electrode placed between the control grid and anode of a valve and having a fixed positive potential relative to the grid. It acts as an electrostatic shield preventing capacitive coupling between grid and anode, thus increasing the stability of the deviceSometimes shortened to: screen See also suppressor grid
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012