{"id":336,"date":"2012-06-23T18:31:08","date_gmt":"2012-06-23T18:31:08","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=336"},"modified":"2012-06-23T21:26:44","modified_gmt":"2012-06-23T21:26:44","slug":"4-65a-thd","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/06\/23\/4-65a-thd\/","title":{"rendered":"4-65a THD"},"content":{"rendered":"

Quick test on a EIMAC JAN-8165\/4-65a NOS. Here is the THD response at output level of +22.22dBu:<\/p>\n

\"\"<\/a>
4-65a THD<\/figcaption><\/figure>\n

Artefacts at 50Hz and above are all a result of a poor filament power supply \ud83d\ude42<\/p>\n

Nice to see this valve providing 0.14% THD at a low operating point: Ia=85mA, Va=246V. At least this is a nice test to show how linear this valve it is.<\/p>\n

\"20120623-222617.jpg\"<\/a><\/p>\n

\"20120623-222630.jpg\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Quick test on a EIMAC JAN-8165\/4-65a NOS. Here is the THD response at output level of +22.22dBu: Artefacts at 50Hz and above are all a result of a poor filament power supply \ud83d\ude42 Nice to see this valve providing 0.14% THD at a low operating point: Ia=85mA, Va=246V. At least this is a nice test … Continue reading “4-65a THD”<\/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":[67,38],"tags":[780,105,104,784],"class_list":["post-336","post","type-post","status-publish","format-standard","hentry","category-thd","category-valve-tester","tag-4-65a","tag-4-65a-dht","tag-4-65a-triode-strapped","tag-thd"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-5q","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/336","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=336"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/336\/revisions"}],"predecessor-version":[{"id":341,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/336\/revisions\/341"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}