{"id":4770,"date":"2015-07-12T19:52:03","date_gmt":"2015-07-12T18:52:03","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=4770"},"modified":"2015-07-12T19:53:36","modified_gmt":"2015-07-12T18:53:36","slug":"lme49830-amp-build-part-i","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2015\/07\/12\/lme49830-amp-build-part-i\/","title":{"rendered":"LME49830 Amp build (part I)"},"content":{"rendered":"

Both channels are ready now. Bias set to 750mA instead of 500mA. This is done by adding a parallel 510\u03a9 resistor to RB1 to increase the bias range.<\/p>\n

I’m using two pairs of 2SJ201\/2SK1530 matched.<\/p>\n

Noise is incredibly low and distortion is very low as expected. 10W or more of class A can be achieved from this board with only 24V supply:<\/p>\n

\"IMG_1385.JPG\"<\/a>\"IMG_1384.JPG\"<\/a><\/p>\n

Here’s a quick test of one of the channels:<\/p>\n

\"board-test4\"<\/a><\/p>\n

It’s very promising. I need to mount\u00a0the supplies to the chassis and do a bit of drilling work to get this amp completed now.<\/p>\n","protected":false},"excerpt":{"rendered":"

Both channels are ready now. Bias set to 750mA instead of 500mA. This is done by adding a parallel 510\u03a9 resistor to RB1 to increase the bias range. I’m using two pairs of 2SJ201\/2SK1530 matched. Noise is incredibly low and distortion is very low as expected. 10W or more of class A can be achieved … Continue reading “LME49830 Amp build (part I)”<\/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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[706,5],"tags":[],"class_list":["post-4770","post","type-post","status-publish","format-standard","hentry","category-lme49830","category-valves"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-1eW","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/4770","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=4770"}],"version-history":[{"count":4,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/4770\/revisions"}],"predecessor-version":[{"id":4777,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/4770\/revisions\/4777"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=4770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=4770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=4770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}