amplifying tube
71Ultra-Linear — is a term used to describe a type of electronic circuit that is used to couple a tetrode or pentode vacuum tube (also called electron valve ) to a load (e.g. to a loudspeaker).The circuit was developed by Alan Blumlein and patented in 1937 (… …
72stringed instrument — a musical instrument having strings as the medium of sound production, played with the fingers or with a plectrum or a bow: The guitar, the harp, and the violin are stringed instruments. * * * Any musical instrument that produces sound by the… …
73Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
74Taq polymerase — is a thermostable DNA polymerase named after the thermophilic bacterium Thermus aquaticus from which it was originally isolatedcite journal|author=Chien A, Edgar DB, Trela JM|year= 1976|title=Deoxyribonucleic acid polymerase from the extreme… …
75Radio receiver design — is a complex topic which can be broken down into a series of smaller topics. A radio communication system requires two tuned circuits each at the transmitter and receiver, all four tuned to the same frequency. [Cheney, M., Uth, R., Glenn, J.… …
76amplifier — /am pleuh fuy euhr/, n. 1. a person or thing that amplifies or enlarges. 2. an electronic component or circuit for amplifying power, current, or voltage. [1540 50; AMPLIFY + ER1] * * * Device that responds to a small input signal (voltage,… …
77drum — drum1 /drum/, n., pl. drums, (esp. collectively for 11) drum, v., drummed, drumming. n. 1. a musical percussion instrument consisting of a hollow, usually cylindrical, body covered at one or both ends with a tightly stretched membrane, or head,… …
78Microwave — This article is about the electromagnetic wave. For the cooking appliance, see Microwave oven. For other uses, see Microwaves (disambiguation). A microwave telecommunications tower on Wrights Hill in Wellington, New Zealand Microwaves, a subset… …
79Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 …
80Oval window — View of the inner wall of the tympanum. (label is fen. oval. black circle near top.) …
