{"id":629,"date":"2012-08-26T18:38:33","date_gmt":"2012-08-26T18:38:33","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=629"},"modified":"2012-08-26T18:44:51","modified_gmt":"2012-08-26T18:44:51","slug":"new-modular-preamp-2601a-and-4p1l","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2012\/08\/26\/new-modular-preamp-2601a-and-4p1l\/","title":{"rendered":"New modular preamp 26\/01a and 4P1L"},"content":{"rendered":"

Today made some progress in building the modular pre-amp using my latest design on the 26. I’m planning to make this preamp a modular one to enable quick changes and replace pair of valves and OT. This will enable to use 01a and 4P1L as well…<\/p>\n

I used a floor plank I found around as the base. The front is a simple aluminium piece that holds the stepped attenuator. Both 4-pin sockets are standing with the rubber suspensors that DHTRob kindly sent me. The two resistor arrays for filament bias are placed between the valves and the OPTs.<\/p>\n

\"20120826-193749.jpg\"<\/a><\/p>\n

\"20120826-193756.jpg\"<\/a><\/p>\n

\"20120826-193803.jpg\"<\/a><\/p>\n

\"20120826-193812.jpg\"<\/a><\/p>\n

\"20120826-193827.jpg\"<\/a><\/p>\n

There is plenty still to be done: connectors, filament regulators and HT bits. \u00a0Once all drilling is done, I will then move onto wiring…<\/p>\n

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

Today made some progress in building the modular pre-amp using my latest design on the 26. I’m planning to make this preamp a modular one to enable quick changes and replace pair of valves and OT. This will enable to use 01a and 4P1L as well… I used a floor plank I found around as … Continue reading “New modular preamp 26\/01a and 4P1L”<\/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":[156,5],"tags":[10,779,184,782,18,78],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","category-pre-amplifier-valves","category-valves","tag-01a","tag-779","tag-26-preamp","tag-4p1l","tag-pre-amp","tag-rod-coleman-regulator"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-a9","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/629","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=629"}],"version-history":[{"count":3,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/629\/revisions"}],"predecessor-version":[{"id":631,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/629\/revisions\/631"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}