{"id":758,"date":"2012-11-04T11:30:23","date_gmt":"2012-11-04T11:30:23","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=758"},"modified":"2012-11-04T19:38:30","modified_gmt":"2012-11-04T19:38:30","slug":"a-new-4p1l-siberian-from-martin","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/11\/04\/a-new-4p1l-siberian-from-martin\/","title":{"rendered":"A new 4P1L Siberian from Martin"},"content":{"rendered":"

Martin kindly sent me a couple of pictures of his latest DHT preamp incarnation of the 4P1L Siberian<\/a>:<\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a><\/p>\n

Here are some notes from Martin about his pre-amp:
\n “A bit more about the circuit, I have built the power supply around the nice AZ1 mesh rectifier. First cap after the rectifier is an obligato 6,8 UF oil followed by a 10H choke and a 100 UF ASC followed by the SSHV2 that I purchased via DiyAudio group buy. On your suggestion I have used the CCS from your 301A preamp. If I refer to my previous preamp with the EF6 penthode in triode connection in parafeed configuration I can say that the 4P1L preamp sounds more detailed and with more air around the instruments. Finally I will do some tests with different output caps to find out if this makes a difference. At the moment I use the Vitamin Q.<\/p>\n

Best regards,
\nMartin”<\/p>\n","protected":false},"excerpt":{"rendered":"

Martin kindly sent me a couple of pictures of his latest DHT preamp incarnation of the 4P1L Siberian: Here are some notes from Martin about his pre-amp: “A bit more about the circuit, I have built the power supply around the nice AZ1 mesh rectifier. First cap after the rectifier is an obligato 6,8 UF … Continue reading “A new 4P1L Siberian from Martin”<\/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":[12,156,5],"tags":[782,142,215,47,44,9,46,78,114],"class_list":["post-758","post","type-post","status-publish","format-standard","hentry","category-dht-valves","category-pre-amplifier-valves","category-valves","tag-4p1l","tag-4p1l-preamp","tag-4p1l-siberian","tag-dht-preamplifier","tag-gyrator","tag-pre-amplifier","tag-preamp","tag-rod-coleman-regulator","tag-siberian"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-ce","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/758","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=758"}],"version-history":[{"count":3,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/758\/revisions"}],"predecessor-version":[{"id":762,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/758\/revisions\/762"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}