{"id":6831,"date":"2019-01-30T18:24:48","date_gmt":"2019-01-31T00:24:48","guid":{"rendered":"http:\/\/w0ep.us\/OM\/?p=6831"},"modified":"2019-01-30T18:24:48","modified_gmt":"2019-01-31T00:24:48","slug":"tentec-argonaut-509","status":"publish","type":"post","link":"http:\/\/w0ep.us\/OM\/?p=6831","title":{"rendered":"TenTec Argonaut 509"},"content":{"rendered":"\n<p>[Yesterday&#8217;s run: 3.4 miles]<\/p>\n\n\n\n<p>One of the items I bought at the hamfest in Jackson was a box of older TenTec radio gear.  It held two more-or-less complete Argonaut 509 radios and some add-on bits like a power supply and a couple of audio CW filters.<\/p>\n\n\n\n<p>So the other day I tore into the worst looking of the two Argonauts.  The cover was falling off and I figured I couldn&#8217;t do it any harm.<\/p>\n\n\n\n<p>Besides the cover, the first thing I noticed was that the main tuning knob was frozen up.  That happens with older TenTec radios.  The tuning mechanism they used, called a PTO, was built with lubricating grease which eventually solidifies.<\/p>\n\n\n\n<p>So I did some reading on that issue and tore into it.  I was able to remove the PTO and disassemble it and clean all of the parts using q-tips and 90% rubbing alcohol.  I tried to loosen it up without disassembly, but that didn&#8217;t get me very far.  So I took it all apart.  I reassembled using white lithium grease.<\/p>\n\n\n\n<p>I then plugged it in and I was able to hear signals on 80 and 40 meter bands.  The higher bands don&#8217;t have much going on these days, so I didn&#8217;t check it all out completely.<\/p>\n\n\n\n<p>This morning I worked on the dial cord.  I gather that it probably originally had one dial cord which worked against an elastic band for dial return.  Someone in the past has replaced that with a more conventional setup, two dial cords with a steel spring in between to keep things taut.  I think they may have had to drill a little hole and put a 2nd pin in the tuning shaft to make that work.<\/p>\n\n\n\n<p>I think I have it working pretty good.<\/p>\n\n\n\n<p>Next I&#8217;m going to do some more reading in the manual and try to touch up the alignment.   I also need to check the transmit signal to see how it sounds, that it is not swoopy or harsh.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2019\/01\/IMG_20190130_070334337-1024x768.jpg\" alt=\"\" class=\"wp-image-6833\" srcset=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2019\/01\/IMG_20190130_070334337-1024x768.jpg 1024w, http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2019\/01\/IMG_20190130_070334337-700x525.jpg 700w, http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2019\/01\/IMG_20190130_070334337-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Modified Argonaut 509 dial cord<br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Yesterday&#8217;s run: 3.4 miles] One of the items I bought at the hamfest in Jackson was a box of older TenTec radio gear. It held two more-or-less complete Argonaut 509 radios and some add-on bits like a power supply and a couple of audio CW filters. So the other day I tore into the worst [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-6831","post","type-post","status-publish","format-standard","hentry","category-ham-radio"],"_links":{"self":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6831"}],"version-history":[{"count":1,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6831\/revisions"}],"predecessor-version":[{"id":6834,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6831\/revisions\/6834"}],"wp:attachment":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6831"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}