{"id":909,"date":"2016-02-04T01:24:26","date_gmt":"2016-02-04T06:24:26","guid":{"rendered":"http:\/\/paulcarbone.com\/blog\/?p=909"},"modified":"2016-02-21T12:50:34","modified_gmt":"2016-02-21T17:50:34","slug":"tektronix-514-when-are-you-from","status":"publish","type":"post","link":"https:\/\/paulcarbone.com\/blog\/tektronix-514-when-are-you-from\/","title":{"rendered":"Tektronix 514: When are you from?"},"content":{"rendered":"<p>Here&#8217;s some of my notes about trying to understand a little bit more about the 514, in particular, mine (S\/N 948)<\/p>\n<p>The usual questions are:<\/p>\n<ul>\n<li>When were they made and for how long?<\/li>\n<li>how many different variants were there, and which were visibly different vs which ones were just internal revisions.<\/li>\n<li>When is mine from, and which are the correct schematics?\u00a0 Usually the schematics will indicate a range of serial numbers for which a particular schematic sheet is valid for.<\/li>\n<\/ul>\n<p>Some of the things I observed in the manuals:<\/p>\n<ul>\n<li>the schematics in the BAMA manual for this manual aren&#8217;t just raw scans, they&#8217;ve been re-composited.\u00a0 It&#8217;s evident elsewhere in the manual as well.\u00a0 Generally whoever put together the PDF manual did a nice job, but it appears they cropped out the serial number info when assembling the PDF schematic pages.\u00a0 d&#8217;oh.<\/li>\n<li>There&#8217;s a few pictures in the BAMA manual:\n<ol>\n<li>\n<div>TYPE 514 D CATHODE RAY OSCILLOSCOPE<\/div>\n<div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SERIES \u201cA&#8221;<\/div>\n<div>With the &#8220;serial&#8221; field on the bottom left of the unit. \u00a0Mine like this, except without the \u2018SERIES \u201cA\u201d\u2019 text. (no S\/N shown next to &#8220;Serial&#8221; callout)<\/div>\n<\/li>\n<li>\n<div><\/div>\n<div>\n<div>TYPE 514AD CATHODE RAY OSCILLOSCOPE<\/div>\n<div>with the serial directly under that. (S\/N #5181)<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li>Comparing the BAMA schematics to the paper one I bought, I can confirm that the BAMA manual schematics are for S\/N 3150 &#8211; 3408.<\/li>\n<li>There&#8217;s a note in my manual that says:<br \/>\n<em>&#8220;Major circuit changes occurred in the Type 514AD oscilloscope at S\/N 3409. Numbers in parenthesis indicate the earlier values in the Type 514D oscilloscope.&#8221;<\/em><br \/>\nSo the &#8216;A&#8217; version is anything after 3409.\u00a0 OK great.<\/li>\n<li>But, looking at the versions of the vertical amplifier schematic, there is:\n<ol>\n<li><em>&#8220;Type 514 \/ 514D Oscilloscope&#8221;<\/em> S\/N 101 &#8211; 3149.<\/li>\n<li><em>&#8220;Type 514 Series A Cathode Ray Oscilloscope&#8221;<\/em>, S\/N 3150-3408 (same one from BAMA) dated March \u201953,<\/li>\n<li><em>&#8220;Type 514 D Cathode Ray Oscilloscope&#8221;<\/em> S\/N 3409+, dated March \u201956, which has notes about changes in S\/N 3650+<\/li>\n<\/ol>\n<\/li>\n<li>So it seems like there&#8217;s the 514, the 514 series A, and the 514A, all available with or without the &#8216;D&#8217; for delay line.\u00a0 The &#8216;Series A&#8217; seems like it might be the precursor to the plain-old &#8216;A&#8217; suffix, common of later models, but there&#8217;s some inconsistencies in naming conventions across the versions of schematics, so it&#8217;s difficult to be certain.\u00a0 These are the earliest years of the company, so it&#8217;s not surprising to see evolution in the documentation.<\/li>\n<\/ul>\n<p>Observations looking through the catalogs:<\/p>\n<ul>\n<li>\n<div>October \u201950 514D is listed for $950.<\/div>\n<\/li>\n<li>\n<div>August \u201951 514D is listed for $950. \u00a0<i>no\u00a0\u2018D\u2019 in silkscreen. <\/i><\/div>\n<\/li>\n<li>\n<div>March \u201952: 514D is listed for $950. \u00a0<i>Underside photo shows PS caps identical to mine, but\u00a0\u2018D\u2019 looks like a part of the silkscreen.<br \/>\n<\/i><\/div>\n<\/li>\n<li>\n<div>March \u201853: catalog says there was a 514-D, but there\u2019s no page for it.<\/div>\n<\/li>\n<li>\n<div>August \u201954: there was -AD only<\/div>\n<\/li>\n<li>\n<div>August \u201955: gone.<\/div>\n<\/li>\n<\/ul>\n<p>The punchline:<\/p>\n<ul>\n<li>Made from 1950 &#8211; 1956<\/li>\n<li>Mine is from somewhere between &#8217;50 &amp; &#8217;52.\u00a0 Had to guess I&#8217;d say &#8217;51.<\/li>\n<li>There were a few different milestones:\n<ol>\n<li>\n<div>S\/N 101 &#8211; 3149<\/div>\n<\/li>\n<li>\n<div>S\/N 3150 &#8211; 3408<\/div>\n<\/li>\n<li>\n<div>S\/N 3409 &#8211; at least 5181<\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li>some minor changes within the first few hundred are called out in the schematics.<\/li>\n<li>They weren&#8217;t advertised after &#8217;53, but available until at least &#8217;56.<\/li>\n<li>BAMA schematics are incomplete (I&#8217;ll upload mine, promise)<\/li>\n<li>I wonder if there were examples where the delay line was added post-sale, and the &#8216;D&#8217; was hand-stamped in, like mine?<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Here&#8217;s some of my notes about trying to understand a little bit more about the 514, in particular, mine (S\/N 948) The usual questions are: When were they made and for how long? how many different variants were there, and &hellip; <a href=\"https:\/\/paulcarbone.com\/blog\/tektronix-514-when-are-you-from\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[39,27],"table_tags":[],"_links":{"self":[{"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/posts\/909"}],"collection":[{"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/comments?post=909"}],"version-history":[{"count":5,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/posts\/909\/revisions"}],"predecessor-version":[{"id":915,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/posts\/909\/revisions\/915"}],"wp:attachment":[{"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/media?parent=909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/categories?post=909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/tags?post=909"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/paulcarbone.com\/blog\/wp-json\/wp\/v2\/table_tags?post=909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}