{"id":7564,"date":"2018-09-03T22:00:51","date_gmt":"2018-09-03T21:00:51","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=7564"},"modified":"2018-09-16T21:05:20","modified_gmt":"2018-09-16T20:05:20","slug":"01a-with-filament-sic-bias","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2018\/09\/03\/01a-with-filament-sic-bias\/","title":{"rendered":"01a with filament SiC bias"},"content":{"rendered":"<p>I tried the below configuration and the results are very promising. \u00a0Sound is as good as previously implemented <a href=\"http:\/\/www.bartola.co.uk\/valves\/2018\/08\/09\/dht-audio-shootout-london\/\">SiC cathode bias<\/a>.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"7589\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2018\/09\/03\/01a-with-filament-sic-bias\/01a-preamp-v5-sic-filament-bias\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg?fit=737%2C684&amp;ssl=1\" data-orig-size=\"737,684\" 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;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"01a Preamp V5 (SiC Filament Bias)\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg?fit=737%2C684&amp;ssl=1\" class=\"size-full wp-image-7589 aligncenter\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg?resize=737%2C684\" alt=\"\" width=\"737\" height=\"684\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg?w=737&amp;ssl=1 737w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Preamp-V5-SiC-Filament-Bias.jpg?resize=300%2C278&amp;ssl=1 300w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px\" \/><\/a><\/p>\n<p>Now looking at the TH and frequency response:<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"7567\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2018\/09\/03\/01a-with-filament-sic-bias\/01a-sic-fbthd01\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?fit=1057%2C341&amp;ssl=1\" data-orig-size=\"1057,341\" 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;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"01a Sic FBTHD01\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?fit=840%2C271&amp;ssl=1\" class=\"size-large wp-image-7567 aligncenter\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01-1024x330.png?resize=840%2C271\" alt=\"\" width=\"840\" height=\"271\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?resize=1024%2C330&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?resize=300%2C97&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?resize=768%2C248&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FBTHD01.png?w=1057&amp;ssl=1 1057w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><a href=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"7566\" data-permalink=\"https:\/\/www.bartola.co.uk\/valves\/2018\/09\/03\/01a-with-filament-sic-bias\/01a-sic-fb-fr-01\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?fit=1058%2C635&amp;ssl=1\" data-orig-size=\"1058,635\" 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;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"01a Sic FB FR 01\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?fit=840%2C504&amp;ssl=1\" class=\"size-large wp-image-7566 aligncenter\" src=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01-1024x615.png?resize=840%2C504\" alt=\"\" width=\"840\" height=\"504\" srcset=\"https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?resize=1024%2C615&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?resize=300%2C180&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?resize=768%2C461&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.bartola.co.uk\/valves\/wp-content\/uploads\/2018\/09\/01a-Sic-FB-FR-01.png?w=1058&amp;ssl=1 1058w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/p>\n<p>The stage performs as expected. I built some prototype PCB for the SiC filament bias. One board per channel. If there is any interest, I will run a bigger batch<\/p>\n<p>&nbsp;<\/p>\n<p>Sounds great, as always.<\/p>\n<p>Cheers<\/p>\n<p>Ale<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I tried the below configuration and the results are very promising. \u00a0Sound is as good as previously implemented SiC cathode bias. Now looking at the TH and frequency response: The stage performs as expected. I built some prototype PCB for the SiC filament bias. One board per channel. If there is any interest, I will &hellip; <a href=\"https:\/\/www.bartola.co.uk\/valves\/2018\/09\/03\/01a-with-filament-sic-bias\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;01a with filament SiC bias&#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_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":[12,911],"tags":[10,853,864,903,1169],"class_list":["post-7564","post","type-post","status-publish","format-standard","hentry","category-dht-valves","category-gyrator-pcb","tag-01a","tag-01a-gyrator","tag-bartola-gyrator","tag-bartola-gyrator-pcb","tag-sic-filament-bias"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-1Y0","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7564","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=7564"}],"version-history":[{"count":4,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7564\/revisions"}],"predecessor-version":[{"id":7590,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7564\/revisions\/7590"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=7564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=7564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=7564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}