This is an AM transmitter that this guy built. He says it’s rich in harmonics – it has no tuning nor low pass filtering and the stages are class C, no forward bias. It should have all the things used to minimize harmonics, like a low pass filter. Class C operation is used to maximize efficiency. But in this case it’s not efficient. That’s not a good design.<\/p>\n\n\n\n
Link was http but should be https, so if the first one doesn’t work, try the second one.<\/p>\n\n\n\n
http:\/\/qrp.gr\/amtx\/?fbclid=IwY2xjawE_b8NleHRuA2FlbQIxMQABHXkD_uTjrCNfhMCsmN9tMrjHkM8DZb4pqg55SMOYwChbXBQ7_-JhSax9fA_aem_tEygvAikJ6zJktZqw–o1A<\/p>\n\n\n\n
https:\/\/qrp.gr\/amtx\/?fbclid=IwY2xjawE_b8NleHRuA2FlbQIxMQABHXkD_uTjrCNfhMCsmN9tMrjHkM8DZb4pqg55SMOYwChbXBQ7_-JhSax9fA_aem_tEygvAikJ6zJktZqw–o1A<\/p>\n","protected":false},"excerpt":{"rendered":"
This is an AM transmitter that this guy built. He says it’s rich in harmonics – it has no tuning nor low pass filtering and the stages are class C, no forward bias. It should have all the things used to minimize harmonics, like a low pass filter. Class C operation is used to maximize <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[311,338,293,323,24,3507,330,7,296,206,80,261,348],"tags":[658,3365,2656,984],"class_list":["post-20230","post","type-post","status-publish","format-standard","hentry","category-am-band","category-building-projects-and-kits","category-do-it-yourself","category-electronic-design","category-electronics-books-documents-literature","category-ferrite","category-oscillators","category-radio-frequency","category-schematics","category-toroids-and-cores","category-transistors","category-transmitter","category-websites","tag-am","tag-schematic","tag-transmitter","tag-website"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/20230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20230"}],"version-history":[{"count":3,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/20230\/revisions"}],"predecessor-version":[{"id":20233,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/20230\/revisions\/20233"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}