{"id":6625,"date":"2013-03-11T15:23:35","date_gmt":"2013-03-11T22:23:35","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=6625"},"modified":"2013-03-11T23:14:06","modified_gmt":"2013-03-12T06:14:06","slug":"2013-03-11-quadrifilar-winding-a-joule-thief-coil","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=6625","title":{"rendered":"2013-03-11 Quadrifilar Winding A Joule Thief Coil"},"content":{"rendered":"<p><a href=\"http:\/\/rustybolt.info\/wordpress\/?attachment_id=6627\" rel=\"attachment wp-att-6627\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-6627\" title=\"P1030272BW3\" src=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/03\/P1030272BW3-300x202.jpg\" alt=\"\" width=\"300\" height=\"202\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/03\/P1030272BW3-300x202.jpg 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/03\/P1030272BW3.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>The typical JT coil is wound bifilar, two windings at the same time.\u00a0 Winding the wire at the same time makes it easier, and it&#8217;s electrically the same as if two separate windings were wound.\u00a0 I often use 24 AWG wire and wind the coil bifilar.\u00a0 But I also wind it using four pieces of wire, I&#8217;ve seen this called quadrifilar winding.\u00a0 The advantage is that the wire can be smaller, and easier to wind.\u00a0 And the resultant four windings can be connected as if they are bifilar, or as in the case of the drawing, three of the windings can be in parallel for the primary, and the fourth used as the feedback winding.\u00a0 The advantage is the three windings have a lot less DC resistance than a single winding, and a lot less loss due to that resistance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The typical JT coil is wound bifilar, two windings at the same time.\u00a0 Winding the wire at the same time makes it easier, and it&#8217;s electrically the same as if two separate windings were wound.\u00a0 I often use 24 AWG wire and wind the coil bifilar.\u00a0 But I also wind it using four pieces of<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=6625\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-6625","post","type-post","status-publish","format-standard","hentry","category-joule-thief-smps-dc-dc"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6625"}],"version-history":[{"count":4,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6625\/revisions"}],"predecessor-version":[{"id":6643,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6625\/revisions\/6643"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}