{"id":6907,"date":"2017-11-12T15:55:51","date_gmt":"2017-11-12T15:55:51","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=6907"},"modified":"2017-11-12T15:55:51","modified_gmt":"2017-11-12T15:55:51","slug":"uv-201a-final-version-finished","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2017\/11\/12\/uv-201a-final-version-finished\/","title":{"rendered":"UV-201a final version – finished!"},"content":{"rendered":"

After doing all the soldering part (which I enjoy much), the preamp<\/a> is now finished. It sounds as good as the original breadboard:<\/p>\n

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

For the curious ones, here you have a picture of the inside:<\/p>\n

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

The teflon sockets are bolted straight into the 4mm top aluminium plate. No microphonic noise this way. Rod Coleman V7 regulators set to 200mA. A pair of Russian Military NOS wire-wound resistors in parallel provides the filament bias. The gyrator PCB<\/a> is set as per original circuit and each valve at 3mA. These are DC coupled to the MOSFET follower PCB<\/a> set at 10mA each. The output is then taken out from a pair of FT-3 teflon caps. <\/p>\n

Now to enjoy this beauty!<\/p>\n","protected":false},"excerpt":{"rendered":"

After doing all the soldering part (which I enjoy much), the preamp is now finished. It sounds as good as the original breadboard: For the curious ones, here you have a picture of the inside: The teflon sockets are bolted straight into the 4mm top aluminium plate. No microphonic noise this way. Rod Coleman V7 … Continue reading “UV-201a final version – finished!”<\/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":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":[911,67],"tags":[10,249,309,903,997,1079,1078,875,1023,1061,1080,938,1077],"class_list":["post-6907","post","type-post","status-publish","format-standard","hentry","category-gyrator-pcb","category-thd","tag-01a","tag-01a-dht","tag-01a-preamp","tag-bartola-gyrator-pcb","tag-ft-2","tag-ft-3","tag-ft-3-caps","tag-gyrator-pcb","tag-gyrator-pcb-bf862","tag-source-follower","tag-teflon-caps","tag-uv201a","tag-uv201a-preamp"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-1Np","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/6907","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=6907"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/6907\/revisions"}],"predecessor-version":[{"id":6911,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/6907\/revisions\/6911"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=6907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=6907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=6907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}