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A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot ...
This is a list of European Mullard–Philips vacuum tubes and their American equivalents. Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme.
A tube tester is an electronic instrument designed to test certain characteristics of vacuum tubes (thermionic valves). Tube testers evolved along with the vacuum tube to satisfy the demands of the time, and their evolution ended with the tube era. The first tube testers were simple units designed for specific tubes to be used in the ...
RMA tube designation. In the years 1942-1944, the Radio Manufacturers Association used a descriptive nomenclature system for industrial, transmitting, and special-purpose vacuum tubes. The numbering scheme was distinct from both the numbering schemes used for standard receiving tubes, and the existing transmitting tube numbering systems used ...
Pages in category "Vacuum tube computers". The following 69 pages are in this category, out of 69 total. This list may not reflect recent changes . List of vacuum-tube computers. Vacuum-tube computer.
A cathode-ray tube(CRT) is a vacuum tubecontaining one or more electron guns, which emit electronbeams that are manipulated to display images on a phosphorescentscreen.[2] The images may represent electrical waveformson an oscilloscope, a frameof videoon an analogtelevision set(TV), digitalraster graphicson a computer monitor, or other phenomena like radartargets. A CRT in a TV is commonly ...
The regions shown in blue are in Ohio. This is a list of area codes in the state of Ohio .
Category:Location codes. Category. : Location codes. Location codes are numeric, alphabetic, or alphanumeric codes that designate a particular place, location, region or landmark. These include. ISO 3166 country codes. U.S. FIPS country code, place code, county code and state code. ICAO and IATA airport codes.