coil antenna -
61Plate detector (radio) — A plate detector is a vacuum tube detector circuit used in A.M. radios. This circuit employs a tube with an indirectly heated cathode, typically a medium mu triode, or a tetrode or pentode with a sharp cut off control grid. Rectification of R.F.… …
62radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
63telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… …
64Nikola Tesla — Tesla, aged 37, 1893, photo by Sar …
65Scalar field theory (pseudoscience) — For the quantum mechanical scalar field theory which is a field theory of spinless particles, see Scalar field theory Scalar field theory (SFT) is a set of theories in a model which posits that there is a basic mechanism that produces the… …
66Theremin — The theremin is one of the earliest electronic musical instruments, and the first musical instrument played without being touched (originally pronounced|ˈteremin but often anglicized as IPAEng|ˈθɛrəmɪn [ [http://www.thereminworld.com/faq.asp… …
67Marconi's law — is the relation between height of antennae and maximum signalling distance. Guglielmo Marconi enunciated at one time an empirical law that, for simple vertical sending and receiving antennae of equal height, the maximum working telegraphic… …
68Guglielmo Marconi — Born 25 April 1874(1874 04 25) Palazzo Marescalchi, Bologna …
69Microphone — For the indie film, see Microphone (film). Microphones redirects here. For the indie band, see The Microphones. A …
70Glutamate dehydrogenase 1 — GLUD1 (Glutamate dehydrogenase 1) is a mitochondrial matrix enzyme, with a key role in the nitrogen and glutamate (Glu) metabolism and the energy homeostasis. GLUD1 is expressed at high levels in liver, brain, pancreas and kidney, but not in… …
