{"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-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-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-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;camera&quot;:&quot;iPad&quot;,&quot;created_timestamp&quot;:&quot;1343232169&quot;,&quot;focal_length&quot;:&quot;4.28&quot;,&quot;iso&quot;:&quot;80&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&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_feature_clip_id":0,"_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_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-7x","jetpack_likes_enabled":true,"jetpack-related-posts":[],"jetpack_featured_media_url":"","_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}]}}