thermionic tube
41control grid — noun an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube • Syn: ↑grid • Hypernyms: ↑electrode • Part Holonyms: ↑tube, ↑vacuum tube, ↑thermionic vacuum tube, ↑ …
42electric circuit — noun an electrical device that provides a path for electrical current to flow (Freq. 1) • Syn: ↑circuit, ↑electrical circuit • Hypernyms: ↑electrical device • Hyponyms: ↑bridge, ↑ …
43electrical circuit — noun an electrical device that provides a path for electrical current to flow • Syn: ↑circuit, ↑electric circuit • Hypernyms: ↑electrical device • Hyponyms: ↑bridge, ↑bridge circuit, ↑ …
44electronic device — noun a device that accomplishes its purpose electronically (Freq. 2) • Hypernyms: ↑device • Hyponyms: ↑answering machine, ↑beeper, ↑pager, ↑defibrillator, ↑display, ↑ …
45Sumlock ANITA calculator — The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world s first all electronic desktop calculators. Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock… …
46Instrument amplifier — This page is about amplifiers for musical instruments. See also instrumentation amplifier, a type of operational amplifier. An instrument amplifier is an electronic amplifier that converts the often barely audible or purely electronic signal from …
47Bass instrument amplification — for the bass guitar, double bass and similar instruments is distinct from other types of amplification systems due to the particular challenges associated with low frequency sound reproduction. This distinction affects the design of the… …
48Thermionics — In physics, thermionics is a branch of electronics dealing with the emission of electrons from matter under the influence of heat. See also *Thermionic emission *Thermionic tube …
49Fleming, Sir John Ambrose — ▪ British engineer born Nov. 29, 1849, Lancaster, Lancashire, Eng. died April 18, 1945, Sidmouth, Devon English engineer who made numerous contributions to electronics, photometry, electric measurements, and wireless telegraphy. After …
50Memex — For the Software Company, see Memex Technology Limited. The memex (a portmanteau of memory and index )[1] is the name given by Vannevar Bush to the hypothetical proto hypertext system he described in his 1945 The Atlantic Monthly article As We… …
