{"id":148,"date":"2024-05-26T21:32:48","date_gmt":"2024-05-26T19:32:48","guid":{"rendered":"https:\/\/la6cda.no\/?p=148"},"modified":"2025-02-18T06:55:57","modified_gmt":"2025-02-18T05:55:57","slug":"23-cm-yagi","status":"publish","type":"post","link":"https:\/\/la6cda.no\/?p=148","title":{"rendered":"23 cm yagi"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Jeg har kj\u00f8pt meg en 29 element yagi fra antenna amplifier.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/antennas-amplifiers.com\/23cm-yagi-antenna-29elements-23cm29dxp\/\">https:\/\/antennas-amplifiers.com\/23cm-yagi-antenna-29elements-23cm29dxp\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg har slitt med diverse antenner, og har endelig gitt opp en LFA yagi for 70 cm.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e5 har jeg pr\u00f8vd meg p\u00e5 en yagi for 23 cm.  Det \u00e5 m\u00e5le slike antenner er jo noe utfordrende for m\u00e5leinstrumentene kan jo ogs\u00e5 gi noen feil.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Akkurat n\u00e5 hadde jeg bare en RG 213 kabel p\u00e5 ca 9 m tilgjengelig.   M\u00e5lt med en Nano VNA har denne kabelen 2,3dB tap p\u00e5 23 cm.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e5 satte jeg en Dummy load i enden av kabelen.  Resultatet ble som i bildet nedenfor.  <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047-1024x768.jpg\" class=\"wp-image-146\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047-1024x768.jpg 1024w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047-300x225.jpg 300w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047-768x576.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047-1536x1152.jpg 1536w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1047.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">M\u00e5ling av kabel med perfekt match<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Her ser vi at et teoretisk perfekt setup gir VSWR 1,65:1 p\u00e5 1296 Mhz.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Da tenkte jeg at bedre enn dette blir det ikke.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e5lingen av selve antennen ble som f\u00f8lger:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048-1024x768.jpg\" class=\"wp-image-147\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048-1024x768.jpg 1024w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048-300x225.jpg 300w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048-768x576.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048-1536x1152.jpg 1536w, https:\/\/la6cda.no\/wp-content\/uploads\/2024\/05\/img_1048.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">M\u00e5ling av selve antennen<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e5 p\u00e5 1296 Mhz viser denne VSWR 1,47:1 som er bedre enn det idelle oppsettet.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg skal f\u00e5 laget en kabel med EcoFlex 10 med krympete N-connectorer.  Jeg vil da teste p\u00e5 nytt med et ideelt oppsett f\u00f8r jeg tester antennen.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg vil bruke denne antennen p\u00e5 23 cm aktivitetstest. Da er det b\u00e5ndet 1296.0-1296.8 som brukes.  Jeg er optimistisk med tanke p\u00e5 denne antennen.  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jeg har kj\u00f8pt meg en 29 element yagi fra antenna amplifier. https:\/\/antennas-amplifiers.com\/23cm-yagi-antenna-29elements-23cm29dxp\/ Jeg har slitt med diverse antenner, og har endelig gitt opp en LFA yagi for 70 cm. N\u00e5 har jeg pr\u00f8vd meg p\u00e5 en yagi for 23 cm. Det \u00e5 m\u00e5le slike antenner er jo noe utfordrende for m\u00e5leinstrumentene kan jo ogs\u00e5 gi &hellip;<\/p>\n","protected":false},"author":1,"featured_media":159,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[30,23],"class_list":["post-148","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radio","tag-23-cm","tag-antenne"],"_links":{"self":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=148"}],"version-history":[{"count":1,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/148\/revisions"}],"predecessor-version":[{"id":149,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/148\/revisions\/149"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/media\/159"}],"wp:attachment":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}