{"id":3866,"date":"2013-09-21T13:37:22","date_gmt":"2013-09-21T18:37:22","guid":{"rendered":"http:\/\/w0ep.us\/OM\/?p=3866"},"modified":"2013-09-24T12:09:33","modified_gmt":"2013-09-24T17:09:33","slug":"hp-8566b-signal-generator","status":"publish","type":"post","link":"http:\/\/w0ep.us\/OM\/?p=3866","title":{"rendered":"HP 8566B spectrum analyzer &#8211; repairs in progress"},"content":{"rendered":"<p>[Today&#8217;s run: 12 miles]<\/p>\n<p>I recently received delivery of the HP 8566B which I purchased as surplus from Uncle Sam.<\/p>\n<p>Plugging the thing in gave me less than satisfactory results, but it was advertised as having\u00a0a bad display so I figured it might.<\/p>\n<p>After chasing down a <a title=\"HP 8566B manuals\" href=\"http:\/\/www.febo.com\/pages\/hardware\/8566B\/\">good manual<\/a> for this particular rev of the thing, I was thinking that maybe I had some mismatched power supply boards, some old and some new.\u00a0 But I got a bit closer and traced two circuit board lines back to where they went under an electrolytic capacitor.\u00a0 Things looked ok from the bottom of the board.\u00a0 I figured I would need to take that cap out so I could see what happened underneath.\u00a0 Here&#8217;s what happened underneath!<\/p>\n<p>It looks like this cap has been leaking acid stuff for a long time.\u00a0 It ate away the traces which were supposed to be meeting at the + hole.\u00a0 (removed reference to gold traces&#8230; probably just copper.)<\/p>\n<p><a href=\"http:\/\/w0ep.us\/OM\/?attachment_id=3868\" rel=\"attachment wp-att-3868\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-3868\" alt=\"8566B board damage\" src=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0243-700x467.jpg\" width=\"700\" height=\"467\" srcset=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0243-700x467.jpg 700w, http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0243-1024x684.jpg 1024w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n<p>Here&#8217;s the bad boy.<\/p>\n<p><a href=\"http:\/\/w0ep.us\/OM\/?attachment_id=3869\" rel=\"attachment wp-att-3869\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-3869\" alt=\"8566B bad capacitor\" src=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0241-700x467.jpg\" width=\"700\" height=\"467\" srcset=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0241-700x467.jpg 700w, http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0241-1024x684.jpg 1024w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Today&#8217;s run: 12 miles] I recently received delivery of the HP 8566B which I purchased as surplus from Uncle Sam. Plugging the thing in gave me less than satisfactory results, but it was advertised as having\u00a0a bad display so I figured it might. After chasing down a good manual for this particular rev of the [&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-3866","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\/3866","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=3866"}],"version-history":[{"count":5,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/3866\/revisions"}],"predecessor-version":[{"id":3886,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/3866\/revisions\/3886"}],"wp:attachment":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3866"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}