{"id":1859,"date":"2014-01-29T11:23:32","date_gmt":"2014-01-29T11:23:32","guid":{"rendered":"http:\/\/warc.org.uk\/?page_id=1859"},"modified":"2014-01-29T18:53:36","modified_gmt":"2014-01-29T18:53:36","slug":"rpi-lfmfhfvhf-wspr-transmitter","status":"publish","type":"page","link":"https:\/\/warc.org.uk\/?page_id=1859","title":{"rendered":"Raspberry Pi LF\/MF\/HF\/VHF WSPR Transmitter"},"content":{"rendered":"<p><a href=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1865 alignleft\" alt=\"wsprnet-ww-20m-prop1\" src=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1-300x140.jpg\" width=\"300\" height=\"140\" srcset=\"https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1-300x140.jpg 300w, https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1-1024x480.jpg 1024w, https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1-250x117.jpg 250w, https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1-150x70.jpg 150w, https:\/\/warc.org.uk\/wp-content\/uploads\/2014\/01\/wsprnet-ww-20m-prop1.jpg 1951w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Weak Signal Propagation Reporter (WSPR).<br \/>\nUsed for weak-signal radio communication between amateur radio operators.<br \/>\nDesigned for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands.<br \/>\nWSPR implements a protocol designed for probing potential propagation paths with low-power transmissions.<br \/>\nTransmissions carry a station&#8217;s callsign, Maidenhead grid locator, and transmitter power in dBm.<br \/>\nStations with internet access can automatically upload their reception reports to a central database called WSPRnet, which includes a mapping facility.<\/p>\n<p>You will need:<\/p>\n<p>\u2022PiFM with a wrapper<br \/>\n\u2022A low pass filter<br \/>\n\u20220 to 250MHz<br \/>\n\u2022+10dBm<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/github.com\/threeme3\/WsprryPi\" target=\"_blank\">https:\/\/github.com\/threeme3\/WsprryPi<\/a><\/p>\n<p><a href=\"http:\/\/wsprnet.org\/drupal\/\" target=\"_blank\">http:\/\/wsprnet.org\/drupal\/<\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a title=\"The Raspberry Pi \u2013 An Introduction and more\" href=\"https:\/\/warc.org.uk\/?page_id=1762\">The Raspberry Pi \u2013 An Introduction and more<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Weak Signal Propagation Reporter (WSPR). Used for weak-signal radio communication between amateur radio operators. Designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station&#8217;s callsign, Maidenhead\u2026<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/warc.org.uk\/?page_id=1859\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":98,"featured_media":0,"parent":1762,"menu_order":7,"comment_status":"open","ping_status":"open","template":"templates\/template-page-with-intro.php","meta":{"footnotes":""},"class_list":["post-1859","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/1859","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\/98"}],"replies":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1859"}],"version-history":[{"count":8,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/1859\/revisions"}],"predecessor-version":[{"id":2110,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/1859\/revisions\/2110"}],"up":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/1762"}],"wp:attachment":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}