Galena cat whisker detector
WebOther articles where cat whisker is discussed: electronics: The vacuum tube era: …devices such as the “cat whisker” detector, which was composed of a fine wire (the whisker) in delicate contact with the … http://earlywireless.com/gecophone_junior_picinfo.htm
Galena cat whisker detector
Did you know?
WebFind many great new & used options and get the best deals for 1920s CRYSTAL GALENA CATS WHISKER WIRELESS SET RADIO RECEIVER JAY-NAY BRITISH at the best … WebThe detector is of the galena/cat's whisker type. A picture of the detector is shown below: galena/cat's whisker detector: click on image for a bigger picture. The galena crystal is held in the screw-cup to the right and the cat's whisker (a curly piece of wire) is held in a sort of pin-chuck to the left. In operation, the handle attached to ...
WebJan 3, 2013 · Most of the crystals that are useful for a radio aren't ones that look particularly pretty, such as galena, which is a crystal form of lead. Second, tuning them is a gigantic pain in the rear. A crystal radio that uses a real crystal is called a "cat's whisker" set, because of the way that the wire dangles over the crystal. http://antena.fe.uni-lj.si/literatura/VajeVT/Schottky/priprava/Cat
Jan 10, 2024 · The most common type was the so-called cat's whisker detector, which consisted of a piece of crystalline mineral, usually galena (lead sulfide), with a fine wire touching its surface. [1] [4] [5] The "asymmetric conduction" of electric current across electrical contacts between a crystal and a metal was … See more A crystal detector is an obsolete electronic component used in some early 20th century radio receivers that consists of a piece of crystalline mineral which rectifies the alternating current radio signal. It was employed as a See more The crystal detector consisted of an electrical contact between the surface of a semiconducting crystalline mineral and either a metal or another crystal. Since at the time they were developed no one knew how they worked, crystal detectors evolved by trial and … See more • Crystal and Solid Contact Rectifiers 1909 publication describes experiments to determine the means of rectification (PDF file). • Radio Detector Development from 1917 The Electrical Experimenter • The Crystal Experimenters Handbook 1922 London publication … See more The contact between two dissimilar materials at the surface of the detector's semiconducting crystal forms a crude semiconductor diode, which acts as a rectifier, conducting electric current well in only one direction and resisting current flowing in the other … See more During the first three decades of radio, from 1888 to 1918, called the wireless telegraphy or "spark" era, primitive radio transmitters called spark gap transmitters were used, which … See more • Barretter detector • Electrolytic detector • Magnetic detector See more
WebA cat's-whisker detector (sometimes called a crystal detector) is an antique electronic component consisting of a thin wire that lightly touches a crystal of semiconducting mineral (usually galena) to make a crude point-contact rectifier.Developed around 1904 by early radio researchers Henry H. C. Dunwoody, G. W. Pickard and others, this device was …
WebDec 24, 2024 · We made a new coil and put the set to the test... It works well now on MW band and is quite selective with a bigger air-cored coil former. Merry Christmas ... kare support servicesWebGalena cat's whisker detector Precision cat's whisker detector using iron pyrite crystal, early 1900s. The crystal is inside the metal capsule under the vertical needle "whisker" … kare terms of serviceWeb1901: Semiconductor Rectifiers Patented as "Cat's Whisker" Detectors Radio pioneer Jagadis Chandra Bose patents the use of a semiconductor crystal rectifier for detecting … lawrenceville family health clinic