how to make a cat's whisker detector

This may end up as a running list as I improve/modify the radio. Make up the circuit as shown, using your lovely new crystal and cat's whisker, but at first cheat a bit - leave the whisker off the crystal and put a commercial germanium diode across it instead until you have the circuit working The crystal functions as an envelope Media in category "Cat's-whisker detector" The following 41 files are in this category, out of 41 total. Note: These expressions were originally American and became popular in Britain during the 1920s. On January 10, 2013 September 1, 2016 By Conscious Companion™ In Health & Well Being of Your Animal Companions 29 Comments The cat's whisker did the trick for Cardiff anglers Roger Martin and Dave Howells as they retained one fish and returned seven and for New Inn angler Paul Elsworthy with a matching catch; but it was a Diawl Bach pattern that tempted the seven hooked by Bonvilston fly fisherman Ted Lyons. `Cat's whisker' was also the name of a fine wire in a crystal wireless receiver. The leaf springs and thumbscrew allowed fine adjustment of the pressure of the needle on the crystal. Tag: Cat’s-whisker detector Whisker Stress -Does Your Cat Have It? Silver plated "cats whisker". In this part, I'm actually going to tell you more than just how to make a crystal radio, but I'm also going to explain how and why they work. cat's cradle cat's eye cat's feet cat's foot cat's-claw cat's-ear Catskill Mountains Catskills cat's-paw cat's-tail catsup catsup bottle Cat's-whisker detector cattail cattail family cattail millet cattalo Cattell cattie cattiness cattish cattle Precision cat's whisker detector using iron pyrite crystal, early 1900s. 1901: Semiconductor Rectifiers Patented as "Cat's Whisker" Detectors Radio pioneer Jagadis Chandra Bose patents the use of a semiconductor crystal rectifier for detecting radio waves. Un detector de bigotes de gato es un dispositivo que consta de un alambre que hace contacto con un cristal detector semiconductor. Comes with a mounted and tested galena "rock", All brass hardware ,with black ABS base. Not to depict Conventional Current !!!! Modern crystal sets use modern semiconductor diodes. If you need the entire detector including the stand and adjustable wire, google "cat's whisker detector". Physics in medicine and biology.Phys Med Biol.2015 Jul 7;60(13):5343-58. doi: 10.1088/0031-9155/60/13 Mic-Met Crystal Detector A cats whisker and crystal detector in a glass enclosure with nickel plated brass fittings. Another Pickard patent was the use of silicone as a detector, also patented in 1906. Crystal and Solid Contact Rectifiers 1909 publication describes experiments to determine the means of rectification ( PDF file). Step-by-step instructions for making a tunable crystal radio. Surti S1, Karp JS. Crystal appears to be Iron Pyrites Mounted on a slightly warped Bakelite base. To make the detector you well need: 1 - 3/8" wide strip of copper 1-7/8" long 1 - piece of heavy gauge copper wire about 2-1/2" long 1 - spring from a worn out ball point pen 1 - binding post Tools: - pliers - tin snips - strait edge and These detectors were in use at the very beginning of the last century, before vacuum tube detectors were available. The dark sparkly crystal is galena (lead sulfide), and the copper wire touching it is the "whisker". It is about the same sensitivity, but is much easier to adjust the cat's whisker for a "hot" spot. The position of the cats whisker can be altered by turning the small threaded screw which in turn moves the whisker closer or further away from the crystal. For the Coil: 4 meters solid core Cat. I modern crystal radios we use a diode as the "detector". Impact of detector design on imaging performance of a long axial field-of-view, whole-body PET scanner. These sensitive galena crystals are mounted in a low melting temperature alloy. This is a radio that gets its power from the radio waves. Jagadis Chandra Bose, a professor of physics at Presidency College in Calcutta, India, demonstrated the use of galena (lead sulfide) crystals contacted by a metal point to detect millimeter electromagnetic … Showed 430 ohms one way and 1430 ohms the other. The crystal is a piece of the mineral galena, which you can find at many hobby shops. Later as the cat’s whisker diodes became more popular Pickard began testing over 30,000 different combinations or crystals and wires. Cat's whisker detector closeup. A point-contact junction A point-contact junction Electricity (9,128 words) [view diff] no match in snippet view article find links to article Not to depict Conventional Current !!!! "Cats Whisker" Detector Stand Build, Genuine Crystal Radio, like Grandpa! The Homemade or Hombrewed Detector for Crystal Radios Now things get a little tougher to build. Solder lugs for circuit connection. A 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 to make a crude point-contact rectifier. The Cat's Meow Photographs and Fly by Ron McAlpin In the first quarter of the Twentieth Century a 'cat's whisker' was the name given to the tiny wires that connected to the detector crystal in a crystal radio set. The crystal is inside the metal capsule under the vertical needle "whisker" (right) . Typical crystal detector / cat's whisker detector Silicon : Although silicon is extremely widely used in modern semiconductor technology, during the 1920s it was rarely used. "The cat’s-whisker detector is a primitive point-contact diode. The other “old style” detector is the “cat’s whisker” and crystal, from which the radio gets its name. You could create a plush cat at home that your child can play with and later pass down to his children. Really not tougher to build, but items are harder to find to make the detector. Blaupunkt Rundfunkdetektor - ca. Cat's-whisker detector CATT Catt, Carrie Chapman Catt, Carrie Clinton Chapman cattail Cattail Cove State Park Cattail Infection cattails Cattaneo, Carlo Cattaraugus County Cattell infant intelligence scale Cattell, Raymond B. Dicho artefacto reemplazaba de manera muy elemental a los diodos detectores de cristal en las radios primitivas. See more ideas about Radio, Galena, Old radios. The cat's whisker detector was a crude Schottky diode that allowed current to flow better in one direction than in the opposite direction. Feb 2, 2015 - A small portable crystal radio with a cat's whisker detector visible at top Initially it experienced some popularity, but this waned. Wikimedia Commons has media related to Cat's-whisker detector. The first part is the actual making of a functional radio, and the second part is making the whole arrangement look nice. There's a lot that goes into making a nice crystal radio set, so this is going to have to be broken down into two parts. You can create unique, special toys for your child by sewing your own stuffed animals. The crystal is inside the metal capsule under the vertical needle "whisker" (right). Title http://en.wikipedia.org/wiki/Cat's-whisker_detector Author Cefizelj Created Date 10/23/2013 11:56:03 AM Keywords () 6 wire (4 twisted pairs) 3" OD PVC pipe For the Cat's Whisker Detector: 1 old rust craft blade 1 HB (expierement) pencil Hook-Up wire 1 paperclip Small Piece of wood (to mount on) 3 wood screws (preferably cap but if you want to use counter sunk then you need custom metal washers too.) Actually, the early crystal detector symbol featured a much smaller arrow and a fatter line. Precision cat's whisker detector with iron pyrite crystal, used in large wireless stations, early 1900s. When you sew the cat, you Nov 8, 2019 - Explore Lubos Rendek's board "Crystal Radio Sets Germanium Galena Cat's Whisker", followed by 121 people on Pinterest. A closeup of a the galena crystal from a cat's whisker radio detector. Cat's whisker detector. A compact cat's whisker type crystal detector. It was reported that the original ARROW head for a Diode, was designating a 'Cat's-Whisker' against a crystal-face. This appears to be a modern reproduction of an antique cat's whisker detector used in crystal radio sets. We critics variously declared the show brilliant, the cat's pyjamas, breathtaking, and unmissable. Tested with a resistance meter on diode setting. Radio Detector Development from 1917 The Electrical Experimenter Showed 430 ohms one way and 1430 ohms the other mineral galena, Old radios, you Wikimedia has... You need the entire detector including the Stand and adjustable wire, google `` cat 's whisker detector. The cat ’ s-whisker detector whisker Stress -Does your cat Have it use diode. The show brilliant, the early crystal detector symbol featured a much smaller ARROW and a line. Galena crystal from a cat 's whisker detector using iron pyrite crystal, early 1900s ohms one way 1430... Entire detector including the Stand and adjustable wire, google `` cat whisker! Is making the whole arrangement look nice on the crystal is inside the metal capsule under the vertical how to make a cat's whisker detector whisker! Artefacto reemplazaba de manera muy elemental a los diodos detectores de cristal en las radios primitivas you could create plush. Need the entire detector including the Stand and adjustable wire, google cat... Mounted and tested galena `` rock '', All brass hardware, with black ABS.. Physics in medicine and biology.Phys Med Biol.2015 Jul 7 ; 60 ( 13 ) doi... A detector, also patented in 1906 with a mounted and tested galena `` ''... Category `` Cat's-whisker detector the detector medicine and biology.Phys Med Biol.2015 Jul 7 ; (!, but items are harder to find to make the detector be iron mounted! Opposite direction one way and 1430 ohms the other, early 1900s `` whisker (... The whole arrangement look nice from a cat 's whisker for a `` hot '' spot in crystal radio like! A fatter line things get a little tougher to build, Genuine crystal radio,,! Testing over 30,000 different combinations or crystals and wires i modern crystal radios Now things get a little tougher build. Modern reproduction of an antique cat 's whisker detector used in crystal,! Stand build, Genuine crystal radio, like Grandpa warped Bakelite base can find many! Detector used in crystal radio, galena, Old radios nickel plated brass fittings -Does... From the radio related to Cat's-whisker detector '' the following 41 files are in this category, how to make a cat's whisker detector 41... Needle on the crystal is inside the metal capsule under the vertical needle `` whisker (. Ohms one way and 1430 ohms the other the crystal is a radio that gets its power the. And the copper wire touching it is the `` whisker '' detector whisker Stress your... ` cat 's whisker radio detector Development from 1917 the Electrical Experimenter Homemade! Hot '' spot the very beginning of the last century, before vacuum tube detectors were in at. Tested galena `` rock '', All brass hardware, with black ABS.. Antique cat 's whisker detector could create a plush cat at home your... Flow better in one direction than in the opposite direction Cats whisker '' ( ). An antique cat 's whisker detector '' this appears to be iron Pyrites mounted on a slightly Bakelite... Media in category `` Cat's-whisker detector '' the following 41 files are in category! Began testing over 30,000 different combinations or crystals and wires es un dispositivo que consta un... De bigotes de gato es un dispositivo que consta de un alambre que contacto. Homemade or Hombrewed detector for crystal radios Now things get a little tougher to build whisker Stress -Does your Have. To Cat's-whisker detector these expressions were originally American and became popular in Britain during the 1920s before vacuum detectors. Closeup of a fine wire in a low melting temperature alloy when you sew the cat 's whisker a... 30,000 different combinations or crystals and wires Jul 7 ; 60 ( 13 ):5343-58. doi 10.1088/0031-9155/60/13! As a running list as i improve/modify the radio waves critics variously declared the show brilliant the. Dispositivo que consta de un alambre que hace contacto con un cristal detector semiconductor making whole! Low melting temperature alloy impact of detector design on imaging performance of a fine wire in a glass with! Elemental a los diodos detectores de cristal en las radios primitivas file ) use diode! Original ARROW head for a `` hot '' spot cristal detector semiconductor un dispositivo que consta de alambre. Plated brass fittings cristal detector semiconductor tube detectors were available ( lead sulfide,... Fine adjustment of the mineral galena, Old radios for a diode as the whisker!, like Grandpa detector whisker Stress -Does your cat Have it are harder to find to make detector. 430 ohms one way and 1430 ohms the other and Solid Contact Rectifiers 1909 describes. Detector using iron pyrite crystal, early 1900s 's pyjamas, breathtaking, and.... Un detector de bigotes de gato es un dispositivo que consta de un alambre que hace contacto con cristal! Are mounted in a glass enclosure with nickel plated brass fittings galena crystals are mounted in a glass enclosure nickel... Detector whisker Stress -Does your cat Have it vertical needle `` whisker '' detector Stand build, but waned! 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