{"id":300,"date":"2017-03-30T18:40:20","date_gmt":"2017-03-30T18:40:20","guid":{"rendered":"https:\/\/klubnl.pl\/wpr\/?p=300"},"modified":"2017-07-12T20:59:23","modified_gmt":"2017-07-12T20:59:23","slug":"sukces-transmisji-na-2970hz","status":"publish","type":"post","link":"https:\/\/klubnl.pl\/wpr\/en\/2017\/03\/30\/sukces-transmisji-na-2970hz\/","title":{"rendered":"Succesful transmission on 2970Hz"},"content":{"rendered":"<p>On 10 march 2017\u00a0 Stefan DK7FC experimented with transmitting on 2970Hz. The signal was received in Todmorden, England by Paul Nicholson at a distance of about 850km!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-301\" src=\"https:\/\/klubnl.pl\/wpr\/wp-content\/uploads\/2017\/03\/dk7fc_2970Hz_Paul.png\" alt=\"\" width=\"800\" height=\"300\" \/><\/p>\n<p><!--more--><\/p>\n<p>The above spectrum is the result of adding the spectra in 1.22uHz bins from\u00a0 13:00- 24:00 UTC each day between 20170317 and 20170320. Paul uses two crossed loops for H-field and an E-field active antenna, this enables synthesis of a highly directional antenna.<\/p>\n<p>This is a historical moment, because it&#8217;s the first amatrur transmission on ULF to span such a distance. The distance is about 9 wavelengths, which is well into the far-field region.<\/p>\n<p>Amateur experiments on very low frequencies should also be of interest to the scientific community. Most of avaliable data is for frequencies above 10kHz or for the military stations on 82Hz and 76Hz.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>10 marca 2017 roku Stefan DK7FC przeprowadzi\u0142 pr\u00f3b\u0119 nadawania na 2970Hz. Sygna\u0142 zosta\u0142 odebrany w Todmorden, Anglii przez Paula Nicholsona. Odleg\u0142o\u015b\u0107 to oko\u0142o 850km!<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10,8,11,9],"class_list":["post-300","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-10","tag-dk7fc","tag-paul-nicholson","tag-ulf"],"translation":{"provider":"WPGlobus","version":"3.0.1","language":"en","enabled_languages":["pl","en"],"languages":{"pl":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/comments?post=300"}],"version-history":[{"count":3,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/300\/revisions"}],"predecessor-version":[{"id":430,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/300\/revisions\/430"}],"wp:attachment":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/media?parent=300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/categories?post=300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/tags?post=300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}