{"id":8424,"date":"2020-05-12T21:56:15","date_gmt":"2020-05-12T20:56:15","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=8424"},"modified":"2020-05-12T21:56:15","modified_gmt":"2020-05-12T20:56:15","slug":"300b-se-amp-build-part-vii-d3a-driver","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2020\/05\/12\/300b-se-amp-build-part-vii-d3a-driver\/","title":{"rendered":"300B SE Amp: build part VII (D3a driver)"},"content":{"rendered":"

It didn’t take long (or at least as long as I thought it would) to finish the driver board. It has a D3a hybrid mu-follower with SiC cathode bias arrangement:<\/p>\n

\"\"<\/a>
D3a Driver Board Finished<\/figcaption><\/figure>\n

The board is mounted on top of this previous board<\/a>.<\/p>\n

<\/p>\n

I usually get a lot of emails asking for more details and pictures of the building process. Here you are for the ones who asked for this. Hopefully this inspires you to build or use some of the same layout\/techniques I use:<\/p>\n

\"Mounting <\/a>
Mounting Hex Standoffs and board connectors <\/div> <\/div>
\"wiring <\/a>
wiring ground <\/div> <\/div>
\"Noval <\/a>
Noval sockets <\/div> <\/div> <\/div>
\"Close <\/a>
Close look of the Novel Sockets <\/div> <\/div> <\/div> <\/div>
\"Ferrite <\/a>
Ferrite beads for the D3a <\/div> <\/div> <\/div>
\"Initial <\/a>
Initial test <\/div> <\/div> <\/div>
\"Board <\/a>
Board from top <\/div> <\/div> <\/div>
\"Hybrid <\/a>
Hybrid Mu-follower boards <\/div> <\/div> <\/div> <\/div> <\/div>\n

Did an initial testing which was really successful. As I used a pair of hybrid mu-follower boards (a.k.a gyrators) which weren’t designed for 250V bias point, I could only dial 230V maximum. It was fine as did a lovely test of 150Vpp anyway.<\/p>\n

The modular approach is very handy. The small PCBs I made for turrets finally paid off. I can connect the boards easily with 2mm banana plugs and remove and\/or change things as needed.<\/p>\n","protected":false},"excerpt":{"rendered":"

It didn’t take long (or at least as long as I thought it would) to finish the driver board. It has a D3a hybrid mu-follower with SiC cathode bias arrangement: The board is mounted on top of this previous board.<\/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":[673,5],"tags":[610,674,545,903,401,749],"class_list":["post-8424","post","type-post","status-publish","format-standard","hentry","category-300b-amp","category-valves","tag-300b","tag-300b-se","tag-300b-single-ended","tag-bartola-gyrator-pcb","tag-fixed-bias","tag-sic-cathode-bias"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-2bS","jetpack_likes_enabled":true,"jetpack-related-posts":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8424","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=8424"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8424\/revisions"}],"predecessor-version":[{"id":8438,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8424\/revisions\/8438"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=8424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=8424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=8424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}