{"id":1316,"date":"2017-02-02T18:33:28","date_gmt":"2017-02-02T17:33:28","guid":{"rendered":"http:\/\/www.ik0vve.net\/?p=1316"},"modified":"2017-02-02T18:38:09","modified_gmt":"2017-02-02T17:38:09","slug":"almost-ready-for-vlf-again","status":"publish","type":"post","link":"https:\/\/www.ik0vve.net\/?p=1316","title":{"rendered":"Almost ready for VLF again"},"content":{"rendered":"<p style=\"text-align: justify;\">Ready again to receive VLF with my new loop. At the moment the antenna is located on the roof under the TX <img decoding=\"async\" loading=\"lazy\" class=\"wp-image-1318 alignright\" src=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/WhatsApp-Image-2017-02-02-at-18.02.02.jpeg\" alt=\"WhatsApp Image 2017-02-02 at 18.02.02\" width=\"533\" height=\"571\" srcset=\"https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/WhatsApp-Image-2017-02-02-at-18.02.02.jpeg 755w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/WhatsApp-Image-2017-02-02-at-18.02.02-280x300.jpeg 280w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/WhatsApp-Image-2017-02-02-at-18.02.02-140x150.jpeg 140w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/WhatsApp-Image-2017-02-02-at-18.02.02-400x429.jpeg 400w\" sizes=\"(max-width: 533px) 100vw, 533px\" \/>antenna for MF-LF.<\/p>\n<p style=\"text-align: justify;\">The preamplifier circuit comes from the easyloop of <a href=\"http:\/\/www.vlf.it\" target=\"_blank\">VLF.IT<\/a>&nbsp;with an OP27 and few others components.<\/p>\n<p style=\"text-align: justify;\">The antenna is composed by 32 turns of 0.15 mm dia. for a total lenght of over 200 meters. No screen has been applied&nbsp;around the wires.<\/p>\n<p style=\"text-align: justify;\">Power supplied from a 12 V battery the signal goes down to the station by a little dual coaxial cable for submergible cameras (video+PS).<\/p>\n<p style=\"text-align: justify;\">Just before the input to the audio board I&#8217;ve used a 50:600 Ohm home made trafo to optimize the signal.<\/p>\n<p style=\"text-align: justify;\">This solution give me less noise and more signal.<\/p>\n<p style=\"text-align: justify;\">Next step will be to insert the GPS to one of the audio channel to discipline by Spectrum Lab the audio board and get a stable and precise frequency.<\/p>\n<p style=\"text-align: justify;\">Under here an image of this afternoon.<\/p>\n<p style=\"text-align: justify;\">I still have an unknown noise on 10KHz.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-1317\" src=\"http:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045-1024x854.jpg\" alt=\"capt170202164045\" width=\"640\" height=\"534\" srcset=\"https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045-1024x854.jpg 1024w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045-300x250.jpg 300w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045-150x125.jpg 150w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045-400x334.jpg 400w, https:\/\/www.ik0vve.net\/wp-content\/uploads\/2017\/02\/capt170202164045.jpg 1149w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ready again to receive VLF with my new loop. At<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13,47,3,65],"tags":[],"_links":{"self":[{"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/1316"}],"collection":[{"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1316"}],"version-history":[{"count":5,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/1316\/revisions"}],"predecessor-version":[{"id":1323,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=\/wp\/v2\/posts\/1316\/revisions\/1323"}],"wp:attachment":[{"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ik0vve.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}