{"id":467,"date":"2012-07-28T08:09:43","date_gmt":"2012-07-28T08:09:43","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=467"},"modified":"2012-07-28T08:09:43","modified_gmt":"2012-07-28T08:09:43","slug":"ht-bench-supply-finished","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/","title":{"rendered":"HT bench supply finished"},"content":{"rendered":"<p>After some tests found that <a title=\"HT PSU finished\" href=\"http:\/\/www.bartola.co.uk\/valves\/2012\/07\/22\/ht-psu-finished\/\">initial design of the power supply<\/a> had some nasty transient response when HT switch was used. Rod Coleman suggested the addition of snubbers and also end up re-arranging the location of the HT SW at the output of the supply. An UF4007 was also added as a protection for any negative spikes at the output due to leak inductance:<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"468\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/bench-raw-supply-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?fit=1549%2C660&amp;ssl=1\" data-orig-size=\"1549,660\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"bench raw supply\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?fit=840%2C358&amp;ssl=1\" class=\"alignleft size-large wp-image-468\" title=\"bench raw supply\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1-1024x436.png?resize=584%2C248\" alt=\"\" width=\"584\" height=\"248\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?resize=1024%2C436&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?resize=300%2C127&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?resize=500%2C213&amp;ssl=1 500w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply1.png?w=1549&amp;ssl=1 1549w\" sizes=\"auto, (max-width: 584px) 85vw, 584px\" \/><\/a><br \/>\n<a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"469\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/bench-raw-supply2-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?fit=1535%2C703&amp;ssl=1\" data-orig-size=\"1535,703\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"bench raw supply2\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?fit=840%2C384&amp;ssl=1\" class=\"alignleft size-large wp-image-469\" title=\"bench raw supply2\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21-1024x468.png?resize=584%2C266\" alt=\"\" width=\"584\" height=\"266\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?resize=1024%2C468&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?resize=300%2C137&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?resize=500%2C228&amp;ssl=1 500w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply21.png?w=1535&amp;ssl=1 1535w\" sizes=\"auto, (max-width: 584px) 85vw, 584px\" \/><\/a><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"470\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/bench-raw-supply3-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?fit=1558%2C776&amp;ssl=1\" data-orig-size=\"1558,776\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"bench raw supply3\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?fit=840%2C418&amp;ssl=1\" class=\"alignleft size-large wp-image-470\" title=\"bench raw supply3\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31-1024x510.png?resize=584%2C290\" alt=\"\" width=\"584\" height=\"290\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?resize=1024%2C510&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?resize=300%2C149&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?resize=500%2C249&amp;ssl=1 500w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/bench-raw-supply31.png?w=1558&amp;ssl=1 1558w\" sizes=\"auto, (max-width: 584px) 85vw, 584px\" \/><\/a><\/p>\n<p>Here is a bottom view of the chassis:<\/p>\n<figure id=\"attachment_471\" aria-describedby=\"caption-attachment-471\" style=\"width: 584px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"471\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/ht-supply\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?fit=1296%2C876&amp;ssl=1\" data-orig-size=\"1296,876\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2.4&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPad&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1343232169&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.28&quot;,&quot;iso&quot;:&quot;80&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"HT supply\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Bottom view of bench HT supply&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?fit=840%2C568&amp;ssl=1\" class=\"size-large wp-image-471\" title=\"HT supply\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply-1024x692.jpg?resize=584%2C394\" alt=\"\" width=\"584\" height=\"394\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?resize=1024%2C692&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?resize=300%2C202&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?resize=443%2C300&amp;ssl=1 443w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/07\/HT-supply.jpg?w=1296&amp;ssl=1 1296w\" sizes=\"auto, (max-width: 584px) 85vw, 584px\" \/><\/a><figcaption id=\"caption-attachment-471\" class=\"wp-caption-text\">Bottom view of bench HT supply<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>After some tests found that initial design of the power supply had some nasty transient response when HT switch was used. Rod Coleman suggested the addition of snubbers and also end up re-arranging the location of the HT SW at the output of the supply. An UF4007 was also added as a protection for any &hellip; <a href=\"https:\/\/www.bartola.co.uk\/valves\/2012\/07\/28\/ht-bench-supply-finished\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;HT bench supply finished&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-467","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-7x","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/467","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=467"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/467\/revisions"}],"predecessor-version":[{"id":473,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/467\/revisions\/473"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}