{"id":305,"date":"2012-06-17T17:17:28","date_gmt":"2012-06-17T17:17:28","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=305"},"modified":"2012-06-18T17:30:34","modified_gmt":"2012-06-18T17:30:34","slug":"thd-benchmark","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/06\/17\/thd-benchmark\/","title":{"rendered":"THD benchmark"},"content":{"rendered":"<p>I&#8217;m still in the process of testing valves, here is how the ranking is coming up so far. This is a mix of driver and output valves. All tested at Vo=+22.22dBu:<\/p>\n<figure id=\"attachment_306\" aria-describedby=\"caption-attachment-306\" style=\"width: 442px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"306\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2012\/06\/17\/thd-benchmark\/thd-analysis\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png?fit=442%2C559&amp;ssl=1\" data-orig-size=\"442,559\" 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=\"THD analysis\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;THD analysis of different valves&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png?fit=442%2C559&amp;ssl=1\" class=\"size-full wp-image-306 \" title=\"THD analysis\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png?resize=442%2C559\" alt=\"\" width=\"442\" height=\"559\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png?w=442&amp;ssl=1 442w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2012\/06\/THD-analysis.png?resize=237%2C300&amp;ssl=1 237w\" sizes=\"auto, (max-width: 442px) 85vw, 442px\" \/><\/a><figcaption id=\"caption-attachment-306\" class=\"wp-caption-text\">THD analysis of different valves<\/figcaption><\/figure>\n<p>Looking at the chart above a couple of interesting points to highlight:<\/p>\n<ul>\n<li>4P1L is the most linear valve I&#8217;ve found so far.<\/li>\n<li>6e5P and 6C45 are expected to be on the top five anyway.<\/li>\n<li>12P17L despite of having similar characteristics as 4P1L is not that linear<\/li>\n<li>6N6P and 6N6P-I disappointed me. I thought the would be more linear..<\/li>\n<li>46 and 47 in triode mode are superb drivers<\/li>\n<\/ul>\n<p>Have so many other ones to test, but limited time&#8230;.<\/p>\n<p>Expect this chart to be updated in the future, so stay tuned \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;m still in the process of testing valves, here is how the ranking is coming up so far. This is a mix of driver and output valves. All tested at Vo=+22.22dBu: Looking at the chart above a couple of interesting points to highlight: 4P1L is the most linear valve I&#8217;ve found so far. 6e5P and &hellip; <a href=\"https:\/\/www.bartola.co.uk\/valves\/2012\/06\/17\/thd-benchmark\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;THD benchmark&#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_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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[67],"tags":[10,783,79,779,778,92,782,29,95,93,94,85,99,54,59,97,98,96,784],"class_list":["post-305","post","type-post","status-publish","format-standard","hentry","category-thd","tag-01a","tag-10y","tag-12p17l","tag-779","tag-778","tag-92","tag-4p1l","tag-6e5p","tag-6j5-pinnnacle","tag-6n6p","tag-6n6p-i","tag-6n7gt","tag-6p6","tag-6sn7","tag-cx301a","tag-cx371a","tag-e180f","tag-ef184","tag-thd"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-4V","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/305","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=305"}],"version-history":[{"count":3,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/305\/revisions"}],"predecessor-version":[{"id":309,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/305\/revisions\/309"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}