{"id":1971,"date":"2018-01-07T21:07:03","date_gmt":"2018-01-07T21:07:03","guid":{"rendered":"http:\/\/dh5ym.hopto.org\/wiki\/?p=1971"},"modified":"2018-01-07T21:07:03","modified_gmt":"2018-01-07T21:07:03","slug":"a-simple-9cm-monitoring-receiver","status":"publish","type":"post","link":"http:\/\/dh5ym.hopto.org\/wiki\/?p=1971","title":{"rendered":"A simple 9cm monitoring receiver"},"content":{"rendered":"<p>Just for fun i tried to collect some components from the shelf and plugged together a simple monitoring receiver for 9cm.<br \/>\nI have a DF9NP PLL OCXO for 2592.2MHz and a pipe-cap filter tuned to 3400MHz. From China i ordered a wideband LNA some month ago. It has about 15dB gain on 9cm. The mixer is a ZEM-4300+ (+7dBm LO). The setup results in a IF of 807.8MHz which is received with an RTLSDR and the very nice GQRX software.<br \/>\nWith a short wire attached to the input of the LNA i was able to receive the local 9cm beacon DM0TUD.<br \/>\n<div id=\"attachment_1972\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1972\" src=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" class=\"size-medium wp-image-1972\" srcset=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware-300x225.jpg 300w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware-768x576.jpg 768w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware-1024x768.jpg 1024w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware-400x300.jpg 400w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9cm_monitor_hardware.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1972\" class=\"wp-caption-text\">9cm monitor hardware<\/p><\/div><br \/>\n<div id=\"attachment_1973\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1973\" src=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor-300x165.png\" alt=\"\" width=\"300\" height=\"165\" class=\"size-medium wp-image-1973\" srcset=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor-300x165.png 300w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor-768x422.png 768w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor-1024x563.png 1024w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor-500x275.png 500w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2018\/01\/9CM_monitor.png 1920w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1973\" class=\"wp-caption-text\">GQRX receiving DM0TUD 9cm beacon<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Just for fun i tried to collect some components from the shelf and plugged together a simple monitoring receiver for 9cm. I have a DF9NP PLL OCXO for 2592.2MHz and a pipe-cap filter tuned to 3400MHz. From China i ordered &hellip; <a href=\"http:\/\/dh5ym.hopto.org\/wiki\/?p=1971\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,27],"tags":[],"class_list":["post-1971","post","type-post","status-publish","format-standard","hentry","category-amateur-radio","category-microwave"],"_links":{"self":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1971","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1971"}],"version-history":[{"count":2,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1971\/revisions"}],"predecessor-version":[{"id":1975,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1971\/revisions\/1975"}],"wp:attachment":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1971"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}