{"id":521,"date":"2016-08-02T18:37:39","date_gmt":"2016-08-02T16:37:39","guid":{"rendered":"http:\/\/www.ik0vve.net\/?p=521"},"modified":"2016-08-02T18:37:39","modified_gmt":"2016-08-02T16:37:39","slug":"increasing-tx-antenna-capacitance","status":"publish","type":"post","link":"http:\/\/www.ik0vve.net\/?p=521","title":{"rendered":"Increasing TX antenna capacitance"},"content":{"rendered":"<p style=\"text-align: justify;\">This is my umpteenth upgrade to the TX antenna to try to get better general performance and get the possibility to work on 136 kHz without tons of electrical wires outside the terrace.<br \/>\nThe new layout is drawn in the next basic picture:<br \/>\n<a href=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-519\" src=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt.png\" alt=\"newAnt\" width=\"646\" height=\"477\" srcset=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt.png 646w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt-300x222.png 300w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt-150x111.png 150w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/newAnt-400x295.png 400w\" sizes=\"(max-width: 646px) 100vw, 646px\" \/><\/a>I&#8217;ve passed from 4 top wire and a single vertical tube to 6 wires as in the picture. The hat is always 13 meters long (I don&#8217;t want to go over the neighbour roof) but now also six wires come down to about 10 meters to the variometer.<br \/>\nThe capacitance was raised from 235 pF to 310, not bad. The only doubt is about the vertical side that is not exactly vertical\u00a0and\u00a0it shows\u00a0an angle of about 75\/80\u00b0 to the ground.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-515\" src=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559-1024x768.jpg\" alt=\"100_4559\" width=\"640\" height=\"480\" srcset=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559-1024x768.jpg 1024w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559-300x225.jpg 300w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559-150x113.jpg 150w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4559-400x300.jpg 400w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a>The telescopic pole by now is not more a radiating part of the antenna, this simplified my life because I don&#8217;t need to insulate the base of the pole for high\u00a0voltages.<br \/>\nThis is the usual photo of the whole antenna with an Unidentified Flying Object up on the left:<br \/>\n<a href=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-518\" src=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562-1024x768.jpg\" alt=\"100_4562\" width=\"640\" height=\"480\" srcset=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562-1024x768.jpg 1024w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562-300x225.jpg 300w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562-150x113.jpg 150w, http:\/\/www.ik0vve.net\/wp-content\/uploads\/2016\/08\/100_4562-400x300.jpg 400w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">Now the target is to tune the antenna for the 136 kHz that should it be possible with a 4.4 mH coil.<\/p>\n<p style=\"text-align: justify;\">\n<p style=\"text-align: justify;\">\n","protected":false},"excerpt":{"rendered":"<p>This is my umpteenth upgrade to the TX antenna to<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[67,68,5,13,66,3,6,7],"tags":[],"_links":{"self":[{"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/521"}],"collection":[{"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=521"}],"version-history":[{"count":3,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/521\/revisions"}],"predecessor-version":[{"id":524,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/521\/revisions\/524"}],"wp:attachment":[{"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=521"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}