{"id":4546,"date":"2018-11-14T10:30:00","date_gmt":"2018-11-13T23:30:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2018\/11\/14\/w7zoi-direct-conversion-receivers-some-amateur-radio-history\/"},"modified":"2025-07-21T17:22:37","modified_gmt":"2025-07-21T07:22:37","slug":"w7zoi-direct-conversion-receivers-some-amateur-radio-history","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2018\/11\/14\/w7zoi-direct-conversion-receivers-some-amateur-radio-history\/","title":{"rendered":"W7ZOI: Direct Conversion Receivers — Some Amateur Radio History"},"content":{"rendered":"
<\/a><\/div>\n

http:\/\/w7zoi.net\/dcrx68.pdf<\/a><\/b>

<\/b> Farhan and Pete WB9FLW alerted me to this wonderful article by Wes Hayward, W7ZOI. I guess my interest in DC receivers must have been noticed by the Google algorithm because I am bombarded by ads extolling the virtues of “Zero IF.” Hey Google — I’m already a believer! I was converted by W7ZOI’s 1968 article in QST. And my belief in the technique has been greatly reinforced by his November 2018 50th anniversary article. <\/b>

<\/b> There is so much good stuff in Wes’s look-back piece. The travails of trying to write for QST are presented very well. And we learn that none-other-than Doug DeMaw himself is responsible for the use of the word “presence” in describing amateur radio audio. <\/b>

<\/b> This article has inspired me to take a new look at the DC receiver I built last winter. Mine needs some work. I think it is kind of deaf. It could probably benefit from a diode ring detector. But it already has presence. <\/b>

<\/b> http:\/\/w7zoi.net\/dcrx68.pdf<\/b><\/a>

<\/b> Thanks Wes. And thanks to Farhan and Pete for the heads up. <\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

http:\/\/w7zoi.net\/dcrx68.pdf Farhan and Pete WB9FLW alerted me to this wonderful article by Wes Hayward, W7ZOI. I guess my interest in DC receivers must have been noticed by the Google algorithm because I am bombarded by ads extolling the virtues of “Zero IF.” Hey Google — I’m already a believer! I was converted by W7ZOI’s 1968 … Continue reading “W7ZOI: Direct Conversion Receivers — Some Amateur Radio History”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":4547,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[271,7,35,66,60,54],"tags":[],"class_list":["post-4546","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arrl","category-demaw-doug","category-direct-conversion","category-farhan","category-hayward-wes","category-phasing-rigs"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4546","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=4546"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4546\/revisions"}],"predecessor-version":[{"id":4548,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4546\/revisions\/4548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/4547"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=4546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=4546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=4546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}