{"id":2836,"date":"2012-01-30T10:31:00","date_gmt":"2012-01-29T23:31:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/30\/my-02-kw-linear-amplifier\/"},"modified":"2025-07-21T14:04:28","modified_gmt":"2025-07-21T04:04:28","slug":"my-02-kw-linear-amplifier","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/30\/my-02-kw-linear-amplifier\/","title":{"rendered":"My .02 KW Linear Amplifier"},"content":{"rendered":"<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2012\/01\/qrpqro.jpg\"><img decoding=\"async\" style=\"display: block; margin: 0px auto 10px; text-align: center; cursor: pointer; width: 400px; height: 299px;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2012\/01\/qrpqro.jpg\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5703371240690419490\" border=\"0\" \/><\/a><span style=\"font-size:130%;\"><span style=\"font-weight: bold;\">Once again, die-hard QRP guys should probably look away at this point&#8230; <\/span><\/p>\n<p><span style=\"font-weight: bold;\">My Cycle 23\/Cycle 24 refurbishing project continues. The JBOT amplifier in the 17 meter SSB rig is now working nicely, but unfortunately just as I got ready to make some contacts, the Coronal Mass Ejection hit us and conditions on 17 deteriorated badly. Looking for something to do, I noticed that in some pictures of my old Azores station, sitting alongside the SSB transmitter there was a small cabinet with a QRO\/QRP switch on the front panel. Ah yes! My Ramsey Kit linear amplifier! This is a MOSFET-based device. Mine was designed for 20, but I changed the low pass filter and put it on 17. Later, in Italy, it went on 20 meters and for some reason I went back to the 20 meter low pass filter. <\/span><\/p>\n<p><span style=\"font-weight: bold;\">Yesterday I blew the dust off this thing, pulled out the 20 meter LP filter and replaced it with a filter that will let my 17 meter RF reach the antenna. Today I fired it up. Wow! 20 Watts! Look out 17 meters!<\/p>\n<p>I really like the QRO\/QRP switch &#8212; it gives me the opportunity to lean back and say (just like the big guns) &#8220;Wait a second Old Man, let me turn on my LINEAR!&#8221; I even have a little fan in the box that you can hear when I go to the QRO position. Unfortunately it doesn&#8217;t make the lights flicker. But we can dream&#8230; <\/span><\/p>\n<p><span style=\"font-weight: bold;\">Our book: &#8220;SolderSmoke &#8212; Global Adventures in Wireless Electronics&#8221;<\/span><a style=\"font-weight: bold;\" href=\"http:\/\/soldersmoke.com\/book.htm\">http:\/\/soldersmoke.com\/book.htm<\/a><span style=\"font-weight: bold;\">Our coffee mugs, T-Shirts, bumper stickers: <\/span><a style=\"font-weight: bold;\" href=\"http:\/\/www.cafepress.com\/SolderSmoke\">http:\/\/www.cafepress.com\/SolderSmoke<\/a><span style=\"font-weight: bold;\">Our Book Store: <\/span><a style=\"font-weight: bold;\" href=\"http:\/\/astore.amazon.com\/contracross-20\">http:\/\/astore.amazon.com\/contracross-20<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Once again, die-hard QRP guys should probably look away at this point&#8230; My Cycle 23\/Cycle 24 refurbishing project continues. The JBOT amplifier in the 17 meter SSB rig is now working nicely, but unfortunately just as I got ready to make some contacts, the Coronal Mass Ejection hit us and conditions on 17 deteriorated badly. &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/30\/my-02-kw-linear-amplifier\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;My .02 KW Linear Amplifier&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44,164,235,105,87],"tags":[],"class_list":["post-2836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-17-meters","category-azores","category-jbot","category-kits","category-qrp"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2836","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=2836"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2836\/revisions"}],"predecessor-version":[{"id":2838,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2836\/revisions\/2838"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/2837"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=2836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=2836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=2836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}