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: <@356107472269869058>

gollark: I mostly just use orbital lasers as a partial hammer replacement.

gollark: And to somehow be proofed against hammers.

gollark: What do you want me to do, patch python's stdlib to use a cryptographically secure RNG?

gollark: ++random uses only the finest random thing algorithms, but probably just mersenne twister.

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