{"id":586,"date":"2015-11-09T23:18:56","date_gmt":"2015-11-09T23:18:56","guid":{"rendered":"http:\/\/www.extremeelectronics.co.uk\/hvexperiments\/?p=586"},"modified":"2015-11-09T23:28:54","modified_gmt":"2015-11-09T23:28:54","slug":"dry-leyden-jar","status":"publish","type":"post","link":"http:\/\/www.extremeelectronics.co.uk\/hvexperiments\/dry-leyden-jar\/","title":{"rendered":"Dry Leyden Jar"},"content":{"rendered":"

\"20151107_221309\"<\/a><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\"20151107_211634\"<\/a><\/td>\nThe Leyden jar starts out with a standard jam jar.<\/td>\n<\/tr>\n
\"20151107_212115\"<\/a><\/td>\nPieces of adhesive aluminium foil are glued to the inside of the jar first. This way its easier to see which bits you have missed the strips should not come more than 3\/4 of the way up the jar for the highest voltage capacity<\/td>\n<\/tr>\n
\"20151107_212124\"<\/a><\/td>\nIf you can’t get you hand in to the jar to stick the pieces down use the handle of a screwdriver\u00a0 to smooth out the pieces. The foil does not need to be absolutely smooth, but there must be no gaps. Corona will form on any edge and eat away at the foil.<\/td>\n<\/tr>\n
\"20151107_212616\"<\/a><\/td>\nGo right around the jam jar until the whole of the inside is covered. to the 3\/4 height. Strips of 20-25mm work best. Larger strips become difficult to handle.<\/td>\n<\/tr>\n
\"20151107_212902\"<\/a><\/td>\n\u00a0For the bottom of the jar use 25mm square pieces. Stick them on to the end of your screwdriver to position them.<\/td>\n<\/tr>\n
\"20151107_212835\"<\/a><\/td>\nYou may need to use more than one screwdriver to get them to stick where you want.<\/td>\n<\/tr>\n
\"20151107_211553\"<\/a><\/td>\nCut a circle of Acrylic bigger then the lid of the jam jar, and cut a circle of copper or brass to fortify the bottom.<\/td>\n<\/tr>\n
\"20151107_214425\"<\/a><\/td>\nAs we are not using water to contact to the inside we need something to stop the foil wearing away a copper of brass circle will spread out the current.<\/td>\n<\/tr>\n
\"20151107_210851\"<\/a><\/td>\nStick this down with the foil. You may need to bevel the copper plate slightly as some jam jars have a domed bottom.<\/td>\n<\/tr>\n
\"20151107_210845\"<\/a><\/td>\nTaking a single sheet of foil slightly longer than the height of the inside foil and wrap it around the jam jar. leaving some spare at the bottom.<\/td>\n<\/tr>\n
\"20151107_213857\"<\/a><\/td>\nSmooth down the extra over the bottom.<\/td>\n<\/tr>\n
\"20151107_214121\"<\/a><\/td>\nand add a patch to the bottom and smooth it down.<\/td>\n<\/tr>\n
\"20151107_214233\"<\/a><\/td>\n\u00a0Use your finder mail to burnish the outside foil of the jam jar.<\/td>\n<\/tr>\n
\"20151107_215853\"<\/a><\/td>\nFor the inside conductor I used a piece of 5mm copper brake pipe to make securing this easier to the top I used a piece of 2mm copper wire that I attached a ring tag.<\/td>\n<\/tr>\n
\"20151107_220120\"<\/a><\/td>\nUsing another piece of the 2mm copper wire I formed a crude spring around a 10mm drill bit.<\/td>\n<\/tr>\n
\"20151107_220541\"<\/a><\/td>\nThe finished inner contact.<\/td>\n<\/tr>\n
\"20151107_220740\"<\/a><\/td>\nI glued a 25mm long x 50mm diameter piece of water pipe to the centre of the top circle of acrylic. This fits the inside of my jam jar snugly.<\/td>\n<\/tr>\n
\"20151107_211431\"<\/a><\/td>\nThe top and inner conductor are put into the jar, so that the spring contacts the bottom of the jar. The inner ring is glued into the inside mouth of the jar to stop the spring from pushing the top out.<\/td>\n<\/tr>\n
\"20151107_214749\"<\/a><\/td>\nA small brass ball was tapped and attached to the bolt from the centre contact.<\/td>\n<\/tr>\n
\"20151107_211619\"<\/a><\/td>\nThe finished jar.<\/td>\n<\/tr>\n
\"Discharge<\/a><\/td>\nUsing a spare piece of the 5mm copper brake tube and\u00a0 a couple of spare brass balls I made a discharge tool. The handle is made from a piece of nylon bar. Although these jars will not store enough charge to kill, they can pack nasty punch. Better to discharge the jar with an insulated tool.<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

The Leyden jar starts out with a standard jam jar. Pieces of adhesive aluminium foil are glued to the inside of the jar first. This way its easier to see which bits you have missed the strips should not come more than 3\/4 of the way up the jar for the highest voltage capacity If you can’t get you hand in to the jar to stick the pieces down use the handle of a screwdriver\u00a0 to smooth out the pieces. The foil does not need to be absolutely smooth, but there must be no gaps. Corona will form on any edge and eat away at the foil. Go right around the jam jar until the whole of the inside is covered. to the 3\/4 height. Strips of 20-25mm work best. Larger strips become difficult to handle. \u00a0For the bottom of the jar use 25mm square pieces. Stick them on to the end of your screwdriver to position them. You may need to use more than one screwdriver to get them to stick where you want. Cut a circle of Acrylic bigger then the lid of the jam jar, and cut a circle of copper or brass to fortify the bottom. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-586","post","type-post","status-publish","format-standard","hentry","category-high-voltage-equipment"],"yoast_head":"\nDry Leyden Jar - High Voltage Experiments<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.extremeelectronics.co.uk\/hvexperiments\/dry-leyden-jar\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dry Leyden Jar - High Voltage Experiments\" \/>\n<meta property=\"og:description\" content=\"The Leyden jar starts out with a standard jam jar. Pieces of adhesive aluminium foil are glued to the inside of the jar first. This way its easier to see which bits you have missed the strips should not come more than 3\/4 of the way up the jar for the highest voltage capacity If you can’t get you hand in to the jar to stick the pieces down use the handle of a screwdriver\u00a0 to smooth out the pieces. The foil does not need to be absolutely smooth, but there must be no gaps. Corona will form on any edge and eat away at the foil. Go right around the jam jar until the whole of the inside is covered. to the 3\/4 height. Strips of 20-25mm work best. Larger strips become difficult to handle. \u00a0For the bottom of the jar use 25mm square pieces. Stick them on to the end of your screwdriver to position them. You may need to use more than one screwdriver to get them to stick where you want. Cut a circle of Acrylic bigger then the lid of the jam jar, and cut a circle of copper or brass to fortify the bottom. 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