Suppressor grid

A suppressor grid is a grid used in a thermionic valve (also called vacuum tube) to suppress secondary emission. A suppressor grid is also called the antidynatron grid, as it helps to reduce the dynatron effect.

Placement

In its simplest form, a suppressor grid, typically of coarse structure, is interposed between the screen grid and the anode (plate) of a tetrode, turning it into a pentode.

Electrical connection of grid

The suppressor grid is usually connected to the cathode and more often than not, this connection is made within the glass envelope. Because the grid is negatively charged relative to both the anode and the screen grid, it repels any secondary electrons back to the anode preventing them from contributing to the screen grid current, and to any negative resistance characteristic.

gollark: Oh, also, quite a few things involve Unicode, which CC can't handle. At all.

gollark: https://validator.w3.org/nu/?doc=https%3A%2F%2Fosmarks.tk%2FResults for my site, which is small and pretty standards-compliant by comparison to most stuff.

gollark: Hmm, let me find the w3c validator...

gollark: Actual browsers just have to make a best guess at what the page actually means. Run any site through a HTML validator and check.

gollark: Why? Partly because it's really weird generally because of inconsistencies, partly because *nothing actually matches the standard properly*.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.