{"id":38979,"date":"2014-05-28T08:57:24","date_gmt":"2014-05-28T06:57:24","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=38979"},"modified":"2023-09-26T15:46:36","modified_gmt":"2023-09-26T13:46:36","slug":"building-the-toothpick-audio-cw-filter","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/diy\/building-the-toothpick-audio-cw-filter\/","title":{"rendered":"Building the \u201cToothpick\u201d Audio CW Filter"},"content":{"rendered":"<p>\u201cToothpick\u201d Audio CW Filter Kit<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-38980 size-medium aligncenter\" src=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit2-300x224.jpg\" alt=\"\" width=\"300\" height=\"224\" srcset=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit2-300x224.jpg 300w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit2.jpg 641w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><a href=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-38981 size-medium\" src=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit1-300x252.jpg\" alt=\"cw-filter-kit1\" width=\"300\" height=\"252\" srcset=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit1-300x252.jpg 300w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit1.jpg 562w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<ul>\n<li>Variable bandpass helps peak desired signal<\/li>\n<li>Audio amplifier will drive speaker to room filling volume<\/li>\n<li>In \/ out switch<\/li>\n<li>Use with phones or speaker<\/li>\n<li>Will work with other qrp rigs and older receivers<\/li>\n<li>Measured peak bandpass 700 to 1000 Hertz<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><a href=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-38982 size-medium\" src=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit3-300x200.jpg\" alt=\"cw-filter-kit3\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit3-300x200.jpg 300w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit3-768x512.jpg 768w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2014\/05\/cw-filter-kit3.jpg 873w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><br \/>\n<strong>Introduction:<\/strong><\/p>\n<p style=\"text-align: justify;\">The \u201ctoothpick\u201d is a simple variable bandpass audio filter designed to compliment the \u201cSplinter\u201d QRPp Trans-Receiver. The filter also contains an audio amplifier which can produce room-filling volume when used with an external speaker. When used with the \u201cSplinter\u201d the filter has the added bonus of amplifying the sidetone oscillator during transmit. Although the design is simple and physically similar to the \u201cSplinter\u201d there is no reason that the \u201cToothpick\u201d could not be used with other simple or vintage receivers needing a little extra audio filtering.<\/p>\n<p style=\"text-align: justify;\">Price: $24.95 USD<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/breadboardradio.com\/breadboardradio\/Products.html\" target=\"_blank\" rel=\"noopener\">Link<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cToothpick\u201d Audio CW Filter Kit Variable bandpass helps peak desired signal Audio amplifier will drive speaker to room filling volume In \/ out switch Use with phones or speaker Will work with other qrp rigs and older receivers Measured peak bandpass 700 to 1000 Hertz Introduction: The \u201ctoothpick\u201d is a simple variable bandpass audio filter&hellip;<\/p>\n","protected":false},"author":2,"featured_media":38980,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[112,259,260],"class_list":["post-38979","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diy","tag-cw","tag-kit","tag-kits","category-2","description-off"],"_links":{"self":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/38979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/comments?post=38979"}],"version-history":[{"count":0,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/38979\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media\/38980"}],"wp:attachment":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media?parent=38979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/categories?post=38979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/tags?post=38979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}