{"id":299,"date":"2014-01-08T21:02:50","date_gmt":"2014-01-08T21:02:50","guid":{"rendered":"http:\/\/warc.org.uk\/?page_id=299"},"modified":"2015-01-22T16:44:38","modified_gmt":"2015-01-22T16:44:38","slug":"the-cdg2000-tx-low-pass-filter","status":"publish","type":"page","link":"https:\/\/warc.org.uk\/?page_id=299","title":{"rendered":"The CDG2000 TX Low Pass Filter"},"content":{"rendered":"<p><b>The CDG2000 TX\u00a0Low\u00a0Pass\u00a0Filter<\/b><\/p>\n<p>This is one of the simpler boards. It is a conventional switched low pass filter followed by a directional coupler for VSWR detection. There are 6 filters, switched by relays.<\/p>\n<p>The following links provide constructional data, performance information, schematics and PCB layouts.<\/p>\n<p>Note \u00a0the PCB and schematic were updated May 2003 to correct relay reversal problem.<\/p>\n<p>&nbsp;<\/p>\n<table border=\"1\" width=\"634\" cellspacing=\"1\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"32%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/description_and_parts_list.doc\">Description<\/a><\/td>\n<td valign=\"top\" width=\"32%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/low_pass_filter_component_layout.pdf\">PCB component placement<\/a><\/td>\n<td valign=\"top\" width=\"35%\"><\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"32%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/schematic.pdf\">Schematic<\/a><\/td>\n<td valign=\"top\" width=\"32%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/low_pass_filter_tracking.pdf\">PCB tracking<\/a><\/td>\n<td valign=\"top\" width=\"35%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/power_meter_calibration.xls\">Directional Coupler Performance<\/a><\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"32%\"><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/low_pass_filter_tracking_reversed.pdf\">PCB tracking reversed<\/a><\/td>\n<td valign=\"top\" width=\"32%\"><\/td>\n<td valign=\"top\" width=\"35%\"><\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"32%\"><\/td>\n<td valign=\"top\" width=\"32%\"><\/td>\n<td valign=\"top\" width=\"35%\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2015\/01\/Lpf.zip\">PCB CAD Download &#8211; LPF<\/a><\/p>\n<p><a title=\"CDG2000 Transceiver\" href=\"https:\/\/warc.org.uk\/?page_id=81\">Return to CDG2000 Home Page<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The CDG2000 TX\u00a0Low\u00a0Pass\u00a0Filter This is one of the simpler boards. It is a conventional switched low pass filter followed by a directional coupler for VSWR detection. There are 6 filters, switched by relays. The following links provide constructional data, performance information, schematics and PCB layouts. Note \u00a0the PCB and schematic\u2026<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/warc.org.uk\/?page_id=299\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":81,"menu_order":0,"comment_status":"open","ping_status":"open","template":"templates\/template-page-with-intro.php","meta":{"footnotes":""},"class_list":["post-299","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=299"}],"version-history":[{"count":11,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/299\/revisions"}],"predecessor-version":[{"id":69712,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/299\/revisions\/69712"}],"up":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/81"}],"wp:attachment":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}