{"id":1127,"date":"2013-01-26T16:23:31","date_gmt":"2013-01-26T16:23:31","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=1127"},"modified":"2013-01-26T16:23:31","modified_gmt":"2013-01-26T16:23:31","slug":"driving-the-45-in-a2-part-3","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2013\/01\/26\/driving-the-45-in-a2-part-3\/","title":{"rendered":"Driving the 45 in A2 (Part 3)"},"content":{"rendered":"

Ok, the previous operating point <\/a>wasn’t optimal from a musicality perspective. As suggested by 45<\/a>, I reworked the load line for 36mA\/275V and anode load of 5.6K\u03a9 (which is what I could get with my OT):<\/p>\n

\"45<\/a>The driver should now provide \"V{}_{gk (pp)} = 2 \cdot (+20V + 55V) = 150Vpp\".<\/p>\n

The output power will be around:<\/p>\n

\"P{}_{a}=\frac{1}{2}\cdot i{}_{ap}^2 \cdot Z{}_{a} = \frac{1}{2} \cdot (36mA)^2 \cdot 5.6K\Omega \cong 3.6W\"<\/p>\n

Efficiency would be around 36% in theory. Happy if around 3W can be obtained from this valve here with a reasonable distortion…<\/p>\n

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

Ok, the previous operating point wasn’t optimal from a musicality perspective. As suggested by 45, I reworked the load line for 36mA\/275V and anode load of 5.6K\u03a9 (which is what I could get with my OT): The driver should now provide . The output power will be around: Efficiency would be around 36% in theory. … Continue reading “Driving the 45 in A2 (Part 3)”<\/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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[12,158,67,5],"tags":[124,48,317,127],"class_list":["post-1127","post","type-post","status-publish","format-standard","hentry","category-dht-valves","category-se-designs","category-thd","category-valves","tag-124","tag-45-se","tag-45-se-a2","tag-45-single-ended-amplifier"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-ib","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1127","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=1127"}],"version-history":[{"count":12,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1127\/revisions"}],"predecessor-version":[{"id":1140,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1127\/revisions\/1140"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=1127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=1127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=1127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}