{"id":262,"date":"2017-01-25T16:04:02","date_gmt":"2017-01-25T14:04:02","guid":{"rendered":"http:\/\/lz2jr.com\/blog\/?p=262"},"modified":"2019-02-22T14:12:52","modified_gmt":"2019-02-22T12:12:52","slug":"band-pass-filters","status":"publish","type":"post","link":"https:\/\/lz2jr.com\/blog\/index.php\/band-pass-filters\/","title":{"rendered":"BAND PASS FILTERS"},"content":{"rendered":"

Six band pass filters were built to cover 10-80m bands on RX. Schematic utilizes Skywork solutions AS169 PHEMT GaAs SPDT switches, used in modern wirelless equipments. In order to perform individually “fine tune” a variable coil inductors are used. The module fully meets project CLICKLESS concept as there aren’t any mechanical switching components. MCP23008 serial controlled I\/O expander is used to engage needed filter. The board has a provision for two optional filters.<\/p>\n

\"\"<\/a><\/p>\n

PCB component side (bottom)
\n\"\"<\/a><\/p>\n

PCB top
\n\"\"<\/a><\/p>\n

The board<\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

Filters spectrum analyzer plots:<\/p>\n

\"\"<\/a>\"\"<\/a>\"\"<\/a><\/p>\n

\"\"<\/a>\"\"<\/a>\"\"<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Six band pass filters were built to cover 10-80m bands on RX. Schematic utilizes Skywork solutions AS169 PHEMT GaAs SPDT switches, used in modern wirelless equipments. In order to perform individually “fine tune” a variable coil inductors are used. The<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[17,13,15],"tags":[],"class_list":["post-262","post","type-post","status-publish","format-standard","hentry","category-bpf","category-hf-home-made-transceiver","category-modules"],"_links":{"self":[{"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=262"}],"version-history":[{"count":5,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/262\/revisions"}],"predecessor-version":[{"id":408,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/262\/revisions\/408"}],"wp:attachment":[{"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lz2jr.com\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}