{"id":1563,"date":"2013-05-18T19:15:21","date_gmt":"2013-05-18T18:15:21","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=1563"},"modified":"2013-05-18T19:15:21","modified_gmt":"2013-05-18T18:15:21","slug":"4-65a-se-amp-building-the-ots","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/","title":{"rendered":"4-65a SE Amp: Building the OTs"},"content":{"rendered":"<p>More work done this afternoon. Built the <a href=\"http:\/\/www.lundahl.se\/pdf\/1620_3_7_9202.pdf\">LL9202\/100mA<\/a> OTs in their supporting structure and fitted the <a title=\"Crowbar protection\" href=\"http:\/\/www.bartola.co.uk\/valves\/2013\/05\/12\/crowbar-protection\/\">crowbar protection boards<\/a> for the primary windings. Also added the speaker posts. A heavy part of the amp!<\/p>\n<div class=\"tiled-gallery type-square tiled-gallery-unresized\" data-original-width=\"840\" data-carousel-extra='{&quot;blog_id&quot;:1,&quot;permalink&quot;:&quot;https:\\\/\\\/www.bartola.co.uk\\\/valves\\\/2013\\\/05\\\/18\\\/4-65a-se-amp-building-the-ots\\\/&quot;,&quot;likes_blog_id&quot;:35997060}' itemscope itemtype=\"http:\/\/schema.org\/ImageGallery\" > <div class=\"gallery-row\" style=\"width: 840px; height: 280px;\" data-original-width=\"840\" data-original-height=\"280\" > <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0571\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1564\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg\" data-orig-size=\"800,533\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899741&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;29&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.033333333333333&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0571\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg?fit=300%2C199&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg?fit=800%2C533&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0571.jpg?zoom=2&amp;resize=276%2C276&amp;ssl=1 552w\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0571\" alt=\"LL9202\/100mA with crowbars\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> LL9202\/100mA with crowbars <\/div> <\/div> <\/div> <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0578\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1565\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg\" data-orig-size=\"800,533\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899865&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;32&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.01&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0578\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg?fit=300%2C199&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg?fit=800%2C533&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0578.jpg?zoom=2&amp;resize=276%2C276&amp;ssl=1 552w\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0578\" alt=\"Crowbar protection for primary winding\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> Crowbar protection for primary winding <\/div> <\/div> <\/div> <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0569\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1566\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg\" data-orig-size=\"800,533\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899697&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;29&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.05&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0569\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg?fit=300%2C199&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg?fit=800%2C533&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0569.jpg?zoom=2&amp;resize=276%2C276&amp;ssl=1 552w\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0569\" alt=\"Crowbar fitted on the back of the OTs\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> Crowbar fitted on the back of the OTs <\/div> <\/div> <\/div> <\/div> <div class=\"gallery-row\" style=\"width: 840px; height: 280px;\" data-original-width=\"840\" data-original-height=\"280\" > <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0576\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1567\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg\" data-orig-size=\"800,533\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899819&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;29&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.05&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0576\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg?fit=300%2C199&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg?fit=800%2C533&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0576.jpg?zoom=2&amp;resize=276%2C276&amp;ssl=1 552w\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0576\" alt=\"Module completed\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> Module completed <\/div> <\/div> <\/div> <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0575\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1568\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg\" data-orig-size=\"800,533\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899808&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;29&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.05&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0575\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg?fit=300%2C199&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg?fit=800%2C533&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0575.jpg?zoom=2&amp;resize=276%2C276&amp;ssl=1 552w\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0575\" alt=\"Speaker binding posts\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> Speaker binding posts <\/div> <\/div> <\/div> <div class=\"gallery-group\" style=\"width: 280px; height: 280px;\" data-original-width=\"280\" data-original-height=\"280\" > <div class=\"tiled-gallery-item \" itemprop=\"associatedMedia\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"> <a href=\"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4-65a-se-amp-building-the-ots\/img_0577\/\" border=\"0\" itemprop=\"url\"> <meta itemprop=\"width\" content=\"276\"> <meta itemprop=\"height\" content=\"276\"> <img decoding=\"async\" class=\"\" data-attachment-id=\"1569\" data-orig-file=\"https:\/\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0577.jpg\" data-orig-size=\"533,800\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;Canon EOS 600D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1368899843&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;29&quot;,&quot;iso&quot;:&quot;400&quot;,&quot;shutter_speed&quot;:&quot;0.04&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"IMG_0577\" data-image-description=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0577.jpg?fit=199%2C300&#038;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0577.jpg?fit=533%2C800&#038;ssl=1\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2013\/05\/IMG_0577.jpg?w=276&#038;h=276&#038;crop=1&#038;ssl=1\" width=\"276\" height=\"276\" loading=\"lazy\" data-original-width=\"276\" data-original-height=\"276\" itemprop=\"http:\/\/schema.org\/image\" title=\"IMG_0577\" alt=\"Crowbars and LL9202\/100mA\" style=\"width: 276px; height: 276px;\" \/> <\/a> <div class=\"tiled-gallery-caption\" itemprop=\"caption description\"> Crowbars and LL9202\/100mA <\/div> <\/div> <\/div> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>More work done this afternoon. Built the LL9202\/100mA OTs in their supporting structure and fitted the crowbar protection boards for the primary windings. Also added the speaker posts. A heavy part of the amp!<\/p>\n","protected":false},"author":1,"featured_media":0,"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":[150,154,158,5],"tags":[137,398],"class_list":["post-1563","post","type-post","status-publish","format-standard","hentry","category-4-65a-se-amplifier-2","category-output-stage","category-se-designs","category-valves","tag-4-65a-se-amplifier","tag-ll9202"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-pd","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/comments?post=1563"}],"version-history":[{"count":6,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1563\/revisions"}],"predecessor-version":[{"id":1575,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1563\/revisions\/1575"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=1563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=1563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=1563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}