File:GRIDS TM11 662 FIG 39.jpg

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Captions

English

Vacuum tube control grids

DescriptionGRIDS TM11 662 FIG 39.jpg	English: Typical control grids for small vacuum tubes.
Date	20 February 1952
Source	TM 11-662/TO 16-1-255 Basic Theory and Application of Electron Tubes. U.S. Government Printing Office, 1952
Author	Departments of the Army and the Air Force

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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