{"id":7234,"date":"2018-02-25T17:03:53","date_gmt":"2018-02-25T17:03:53","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=7234"},"modified":"2018-02-25T17:03:53","modified_gmt":"2018-02-25T17:03:53","slug":"swenson-tests-with-smps","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2018\/02\/25\/swenson-tests-with-smps\/","title":{"rendered":"Swenson+ tests with SMPS"},"content":{"rendered":"
Here is a test you might want to take into account. I own an HGC-320-700A SMPS which only allows for maximum current trimming, but output voltage is fixed. In order to avoid unnecessary heatsink, I will suggest using an RC before the Swenson where the R is a big Alu clamped wirewound resistor bolted to the chassis. Just leave 50V for the regulator which may dissipate a lot anyway depending on the output current.<\/div>\n
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There is no caps below and was stable enough. I could have added an output cap but I didn\u2019t on this test. You can see how all the HF noise is trimmed out! About 40 to 60dB \ud83d\ude42<\/div>\n
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The 44mA and 88mA traces are the SMPS feeding the power resistor directly. <\/div>\n
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This can be improved further with a (mandatory) output cap. A nice 30uF oil cap should do well.<\/div>\n
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I have offered some pairs built and tested to builders using the prototype boards. I may do a couple more if you are interested<\/div>\n
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Here is a test you might want to take into account. I own an HGC-320-700A SMPS which only allows for maximum current trimming, but output voltage is fixed. In order to avoid unnecessary heatsink, I will suggest using an RC before the Swenson where the R is a big Alu clamped wirewound resistor bolted to … Continue reading “Swenson+ tests with SMPS”<\/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_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":[5],"tags":[57,1122,1120,1121],"class_list":["post-7234","post","type-post","status-publish","format-standard","hentry","category-valves","tag-ccs","tag-hv-regulator","tag-smps","tag-swenson"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-1SG","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7234","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=7234"}],"version-history":[{"count":3,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7234\/revisions"}],"predecessor-version":[{"id":7239,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/7234\/revisions\/7239"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=7234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=7234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=7234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}