{"id":650,"date":"2022-10-15T22:54:00","date_gmt":"2022-10-15T11:54:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2022\/10\/15\/dc-receiver-100db-gain-diplexer-vfo-in-a-box\/"},"modified":"2025-07-22T18:02:55","modified_gmt":"2025-07-22T08:02:55","slug":"dc-receiver-100db-gain-diplexer-vfo-in-a-box","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2022\/10\/15\/dc-receiver-100db-gain-diplexer-vfo-in-a-box\/","title":{"rendered":"DC Receiver:  100db Gain?  Diplexer?  VFO in a box?"},"content":{"rendered":"<p><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"247\" src=\"https:\/\/www.youtube.com\/embed\/Wa4Pua0kdh8?rel=0\" title=\"YouTube video player\" width=\"440\"><\/iframe><\/p>\n<div><\/div>\n<div><span style=\"background-color: #f9f9f9; color: #030303; font-family: Roboto, Arial, sans-serif; font-size: 14px; white-space: pre-wrap;\"><b>Here is a progress report on Direct Conversion Receiver developments. Dual Tuned Circuit, Diode Ring with Diplexer, PTO VFO from Farhan&#8217;s Daylight rig, two stage 49 db BJT AF amp with a transformer. It works very well. I discuss: Shielding of the VFO &#8212; necessary or not? Why brass in the PTO? Do we really need 100db in a receiver, especially with ear buds? Sourcing the AF amplifier&#8217;s transformer. Using W7EL&#8217;s diplexer. (I think it has solved my Radio Marti breakthrough problem). Developing a DC RX circuit that can be built by students. I end with a bandsweep of 40 meters that includes CW, FT-8, SSB, and AM<\/b><\/span><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Here is a progress report on Direct Conversion Receiver developments. Dual Tuned Circuit, Diode Ring with Diplexer, PTO VFO from Farhan&#8217;s Daylight rig, two stage 49 db BJT AF amp with a transformer. It works very well. I discuss: Shielding of the VFO &#8212; necessary or not? Why brass in the PTO? Do we really &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2022\/10\/15\/dc-receiver-100db-gain-diplexer-vfo-in-a-box\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;DC Receiver:  100db Gain?  Diplexer?  VFO in a box?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42,35,66,60,206,34,90,12,53],"tags":[],"class_list":["post-650","post","type-post","status-publish","format-standard","hentry","category-40-meters","category-direct-conversion","category-farhan","category-hayward-wes","category-lewallan-roy","category-mixer-theory","category-souleles-dean","category-tj-dc-rx","category-vfo"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=650"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/650\/revisions"}],"predecessor-version":[{"id":11346,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/650\/revisions\/11346"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}