{"id":1183,"date":"2013-02-02T19:40:39","date_gmt":"2013-02-02T19:40:39","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=1183"},"modified":"2013-02-02T19:40:39","modified_gmt":"2013-02-02T19:40:39","slug":"sweating-the-45-part4","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2013\/02\/02\/sweating-the-45-part4\/","title":{"rendered":"Sweating the 45… (Part4)"},"content":{"rendered":"

Last week I looked at optimising \u00a0the 45 loadline in A2<\/a>. \u00a0Clearly we shouldn’t be attempting to get more than 2W from this valve without a\u00a0significant\u00a0level of\u00a0distortion. However, having about of 3W would be attractive for the transient response of this amp.<\/p>\n

So how will this circuit perform in a simulation? Let’s see what the spice results are:<\/p>\n

\"45<\/a>The THD is significantly better due to the harmonic cancellation between the two stages. The driver distortion is \u00a00.3% at full tilt (150vpp) and this could be improved. I guess the 6e5p could do better, but interesting to see how the cancellation of harmonics may play around. The new operating point and the stacked supplies will demand different MOSFET parts of 1kV for sure…<\/p>\n

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

Last week I looked at optimising \u00a0the 45 loadline in A2. \u00a0Clearly we shouldn’t be attempting to get more than 2W from this valve without a\u00a0significant\u00a0level of\u00a0distortion. However, having about of 3W would be attractive for the transient response of this amp. So how will this circuit perform in a simulation? Let’s see what the … Continue reading “Sweating the 45… (Part4)”<\/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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[12,158,67,5],"tags":[124,128,312,48,126,127,782,286,109],"class_list":["post-1183","post","type-post","status-publish","format-standard","hentry","category-dht-valves","category-se-designs","category-thd","category-valves","tag-124","tag-45-dht-amplifier","tag-45-in-a2","tag-45-se","tag-45-se-amplifier","tag-45-single-ended-amplifier","tag-4p1l","tag-4p1l-driver","tag-4p1l-triode-mode"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-j5","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1183","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=1183"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1183\/revisions"}],"predecessor-version":[{"id":1186,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1183\/revisions\/1186"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=1183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=1183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=1183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}