{"id":197,"date":"2014-04-05T19:35:38","date_gmt":"2014-04-06T02:35:38","guid":{"rendered":"http:\/\/nickstoys.com\/?p=197"},"modified":"2014-04-05T19:35:59","modified_gmt":"2014-04-06T02:35:59","slug":"dual-band-2m70cm-yagi-with-duplexer","status":"publish","type":"post","link":"http:\/\/nickstoys.com\/index.php\/archives\/197","title":{"rendered":"Dual band (2m\/70cm) yagi with duplexer"},"content":{"rendered":"<p><a href=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191752.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191752-225x300.jpg\" alt=\"IMG_20140405_191752\" width=\"225\" height=\"300\" class=\"alignleft size-medium wp-image-198\" srcset=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191752-225x300.jpg 225w, http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191752-768x1024.jpg 768w, http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191752-525x700.jpg 525w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a>The second project of the day was a dual band antenna to try to hit amateur satellites with. This particular one is 2 m &#038; 70 cm. The construction is 1\/8&#8243; brass rod with a small duplexer. There are no results to report so far, other than we were able to hit a local 2 m repeater with it. There was one pass of the satellite SO-50 this evening, but we didn&#8217;t get anything. We were also in the house and without a good compass, so it doesn&#8217;t count. The construction was fairly simple, and some reference sites are listed below. It should have a reasonable amount of gain, and the duplexer should be effective at splitting the signal between the bands, and it should be tuned correctly, but I don&#8217;t have the proper tools on hand to test any of that. One of these days I&#8217;ll get an oscilloscope, a signal generator, and an SWR meter, and I&#8217;ll be much better able to test a lot of these things at that point.<\/p>\n<p> <a href=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191818.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191818-225x300.jpg\" alt=\"IMG_20140405_191818\" width=\"225\" height=\"300\" class=\"alignright size-medium wp-image-199\" srcset=\"http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191818-225x300.jpg 225w, http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191818-768x1024.jpg 768w, http:\/\/nickstoys.com\/wp-content\/uploads\/2014\/04\/IMG_20140405_191818-525x700.jpg 525w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a>For today though, it was a fun project, and my first attempt at surface mount soldering. Future plans are to do some more testing in the 2 m and 70 cm bands with other ground based radios at both 1 and 5 watts to try and verify the duplexer is functioning, and an outdoor test to try to hit SO-50 once we&#8217;re sure the antenna is working.<br \/>\n <br style=\"clear:left\" \/><\/p>\n<ul>\n<li>http:\/\/k0lee.com\/duplexer.php<\/li>\n<li>http:\/\/www.wa5vjb.com\/yagi-pdf\/cheapyagi.pdf<\/li>\n<li>http:\/\/www.wa5vjb.com\/references\/Cheap%20Antennas-LEOs.pdf<\/li>\n<li>http:\/\/www.g6lvb.com\/HomebrewArrow.htm<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The second project of the day was a dual band antenna to try to hit amateur satellites with. This particular one is 2 m &#038; 70 cm. The construction is 1\/8&#8243; brass rod with a small duplexer. There are no results to report so far, other than we were able to hit a local 2 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[19,20,17,14,18],"class_list":["post-197","post","type-post","status-publish","format-standard","hentry","category-ham-radio","tag-2m","tag-70cm","tag-antenna","tag-radio","tag-yagi"],"_links":{"self":[{"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/posts\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/comments?post=197"}],"version-history":[{"count":4,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/posts\/197\/revisions"}],"predecessor-version":[{"id":203,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/posts\/197\/revisions\/203"}],"wp:attachment":[{"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/nickstoys.com\/index.php\/wp-json\/wp\/v2\/tags?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}