{"id":291,"date":"2012-06-17T11:06:50","date_gmt":"2012-06-17T11:06:50","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=291"},"modified":"2012-06-17T11:06:50","modified_gmt":"2012-06-17T11:06:50","slug":"6n7-as-a-driver","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/06\/17\/6n7-as-a-driver\/","title":{"rendered":"6n7 as a driver"},"content":{"rendered":"
\"\"<\/a>
6n7 THD analysis<\/figcaption><\/figure>\n

I have tested more than 10 different ST and metal 6N7. Some GT, other simply old ST G ones and metal as well. Both triodes in parallel as usually this is the configuration used as an amplifier driver. Found a good operating point from a distortion perspective around Ia=6mA, Vg=-5.6V. As you can see you should expect getting around 0.09% THD. With some good valves reaching as low as 0.04%, but will have to be hand-selected.<\/p>\n

\"\"<\/a>
Some 6N7 under test<\/figcaption><\/figure>\n

Great driver from a sound perspective, with low distortion close to a 26 and on average\u00a0slightly\u00a0better than the 6J5. Need to review famous 6SN7, but there are lots of measurements for this one out there.<\/p>\n

\"\"<\/a>
6n7 THD histogram<\/figcaption><\/figure>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I have tested more than 10 different ST and metal 6N7. Some GT, other simply old ST G ones and metal as well. Both triodes in parallel as usually this is the configuration used as an amplifier driver. Found a good operating point from a distortion perspective around Ia=6mA, Vg=-5.6V. As you can see you … Continue reading “6n7 as a driver”<\/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":[779,51,84,85,54,86,784,39],"class_list":["post-291","post","type-post","status-publish","format-standard","hentry","category-thd","tag-779","tag-6j5","tag-6n7","tag-6n7gt","tag-6sn7","tag-st-valve","tag-thd","tag-valve-tester-2"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-4H","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/291","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=291"}],"version-history":[{"count":1,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/291\/revisions"}],"predecessor-version":[{"id":296,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/291\/revisions\/296"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}