field-control triode
61John Vincent Lawless Hogan — Infobox Scientist name = John Vincent Lawless Hogan caption = birth date = birth date|1890|2|14 birth place = Philadelphia death date = death date and age|1960|12|29|1890|2|14 death place = residence = United States nationality =American field =… …
62Robert von Lieben — (September 5, 1878 in Vienna ndash; February 20, 1913 in Vienna) was a notable Austrian physicist.Robert von Lieben was born to Leopold von Lieben and Anna von Lieben.EducationLieben attempted gymnasium and then enrolled Realschule . However, he… …
63J. R. R. Tolkien — Infobox Writer name = J. R. R. Tolkien birthname = John Ronald Reuel Tolkien imagesize =225px caption = Tolkien in 1972 birthdate = birth date|1892|1|3|df=y birthplace = Bloemfontein, Orange Free State deathdate = 2 September 1973 (aged 81)… …
64Operational amplifier — A Signetics μa741 operational amplifier, one of the most successful op amps. An operational amplifier ( op amp ) is a DC coupled high gain electronic voltage amplifier with a differential input and, usually, a single ended output.[1] An op amp… …
6520th century — For other uses, see 20th century (disambiguation). Millennium: 2nd millennium Centuries: 19th century · 20th century · 21st century Decades: 1900s 1910s …
66High-end audio — is a term used to describe higher priced and/or higher quality audio equipment. Definition of high end High end audio can refer to the build quality of the components, but more specifically, refers to the ability to reproduce a recording with the …
67Saints Cyril and Methodius — For other uses, see Cyril, Methodius. Saints Cyril and Methodius Sa …
