{"id":4120,"date":"2021-03-15T11:48:31","date_gmt":"2021-03-15T16:48:31","guid":{"rendered":"https:\/\/pugix.com\/synth\/?p=4120"},"modified":"2021-04-08T12:58:41","modified_gmt":"2021-04-08T17:58:41","slug":"telequipment-d66-scope","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/","title":{"rendered":"Telequipment D66 Scope"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4121\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-front\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?fit=1280%2C960&amp;ssl=1\" data-orig-size=\"1280,960\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805904&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;200&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-front\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?fit=1024%2C768&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=1024%2C768&#038;ssl=1\" alt=\"\" class=\"wp-image-4121\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=1024%2C768&amp;ssl=1 1024w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=220%2C165&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=250%2C188&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=355%2C266&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=730%2C548&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?resize=90%2C68&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-front.jpeg?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>I took apart my old oscilloscope to have a look and clean it up.  I had inherited this &#8216;scope from my father-in-law, and it&#8217;s served me quite well for years.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<p>Telequipment is a registered trademark of Tektronix, U.K.  I found the D66 User and Service Manual online.  The manual is dated 1977.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>25 MHz<\/li><li>All solid state<\/li><li>Dual trace<\/li><li>8 x 10 cm CRT<\/li><li>Sum, alternate, chop channel displays<\/li><li>X &#8211; Y display<\/li><\/ul>\n\n\n\n<p>The manual is incredibly detailed and is comprised of six sections:  Specifications, Operating Instructions, Circuit Descriptions (with full explanation of the design), Maintenance and Calibration, Component List (every single part), and Circuit Diagrams (complete schematics).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Build<\/h3>\n\n\n\n<p>This instrument is solidly built.  All calibration trimmers are accessible, if you would care to calibrate it (requires another oscilloscope, signal generators, etc.).  I disassembled a few parts with the aim of measuring the ESR on the old electrolytic capacitors and to look for pots I could clean.  The design is modular, with three main and several smaller circuit boards.  All the transistors are in sockets!  Why?  I was hoping to remove the board with all of the large electrolytics to test ESR and possibly re-cap, but unfortunately although some of the connections have wires with disconnect pins, a lot of the wiring under the board is directly soldered in.  The ESR (Effective Series Resistance) that I was able to check was a bit high, not good, but not terrible either.  So I gave up on the re-cap idea.<\/p>\n\n\n\n<p>I was able to spray some CRC into three of the pots and the two switches for DC\/AC probe coupling, but many of the pots were inaccessible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Photos<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"906\" height=\"1024\" data-attachment-id=\"4123\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-crt-back\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?fit=1133%2C1280&amp;ssl=1\" data-orig-size=\"1133,1280\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805581&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;100&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-crt-back\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?fit=906%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=906%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-4123\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=906%2C1024&amp;ssl=1 906w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=500%2C565&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=768%2C868&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=220%2C249&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=250%2C282&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=355%2C401&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=730%2C825&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?resize=90%2C102&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-crt-back.jpeg?w=1133&amp;ssl=1 1133w\" sizes=\"auto, (max-width: 906px) 100vw, 906px\" \/><figcaption>Back of scope, showing AC voltage selector<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"610\" data-attachment-id=\"4124\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-top-wide\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?fit=1280%2C763&amp;ssl=1\" data-orig-size=\"1280,763\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805660&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;64&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-top-wide\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?fit=1024%2C610&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=1024%2C610&#038;ssl=1\" alt=\"\" class=\"wp-image-4124\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=1024%2C610&amp;ssl=1 1024w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=500%2C298&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=768%2C458&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=220%2C131&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=250%2C149&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=355%2C212&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=730%2C435&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?resize=90%2C54&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-wide.jpeg?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption>Top, showing CRT housing and dual input sub-units<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4125\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-top-narrow\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?fit=1280%2C960&amp;ssl=1\" data-orig-size=\"1280,960\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805695&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;64&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-top-narrow\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?fit=1024%2C768&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=1024%2C768&#038;ssl=1\" alt=\"\" class=\"wp-image-4125\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=1024%2C768&amp;ssl=1 1024w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=220%2C165&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=250%2C188&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=355%2C266&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=730%2C548&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?resize=90%2C68&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-top-narrow.jpeg?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption>Closeup of top (all those trimmers!)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"619\" data-attachment-id=\"4126\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-bottom-wide\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?fit=1280%2C774&amp;ssl=1\" data-orig-size=\"1280,774\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805731&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;80&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-bottom-wide\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?fit=1024%2C619&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=1024%2C619&#038;ssl=1\" alt=\"\" class=\"wp-image-4126\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=1024%2C619&amp;ssl=1 1024w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=500%2C302&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=768%2C464&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=220%2C133&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=250%2C151&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=355%2C215&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=730%2C441&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?resize=90%2C54&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-wide.jpeg?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption>Bottom.  Lightning bolt cover over high-voltage capacitors<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-attachment-id=\"4127\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-bottom-front\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?fit=960%2C1280&amp;ssl=1\" data-orig-size=\"960,1280\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805778&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;125&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-bottom-front\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?fit=768%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=768%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-4127\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=768%2C1024&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=500%2C667&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=220%2C293&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=250%2C333&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=355%2C473&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=730%2C973&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?resize=90%2C120&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-bottom-front.jpeg?w=960&amp;ssl=1 960w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>Detail of bottom front<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4128\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-capacitors\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?fit=1280%2C960&amp;ssl=1\" data-orig-size=\"1280,960\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805799&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;64&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-capacitors\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?fit=1024%2C768&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=1024%2C768&#038;ssl=1\" alt=\"\" class=\"wp-image-4128\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=1024%2C768&amp;ssl=1 1024w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=220%2C165&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=250%2C188&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=355%2C266&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=730%2C548&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?resize=90%2C68&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-capacitors.jpeg?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption>Capacitor board that I lifted up partway<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-attachment-id=\"4129\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-transformer\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?fit=960%2C1280&amp;ssl=1\" data-orig-size=\"960,1280\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615805824&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;160&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-transformer\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?fit=768%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=768%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-4129\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=768%2C1024&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=500%2C667&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=220%2C293&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=250%2C333&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=355%2C473&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=730%2C973&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?resize=90%2C120&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-transformer.jpeg?w=960&amp;ssl=1 960w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>Massive power transformer (most of the weight of the &#8216;scope)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-attachment-id=\"4131\" data-permalink=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/d66-working\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?fit=960%2C1280&amp;ssl=1\" data-orig-size=\"960,1280\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1615808228&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;320&quot;,&quot;shutter_speed&quot;:&quot;0.025&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"d66-working\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?fit=768%2C1024&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=768%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-4131\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=768%2C1024&amp;ssl=1 768w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=500%2C667&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=220%2C293&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=250%2C333&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=355%2C473&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=730%2C973&amp;ssl=1 730w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?resize=90%2C120&amp;ssl=1 90w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2021\/03\/d66-working.jpeg?w=960&amp;ssl=1 960w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>I didn&#8217;t break it!<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>I took apart my old oscilloscope to have a look and clean it up. I had inherited this &#8216;scope from my father-in-law, and it&#8217;s served me quite well for years. &#8230; <a class=\"styledbutton\" href=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":4131,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[14],"tags":[71],"class_list":["post-4120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-diy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Telequipment D66 Scope - Richard Brewster&#039;s Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/telequipment-d66-scope\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Telequipment D66 Scope - Richard Brewster&#039;s Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"I took apart my old oscilloscope to have a look and clean it up. 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I had inherited this &#8216;scope from my father-in-law, and it&#8217;s served me quite well for years. ... 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