{"id":214,"date":"2014-07-26T20:31:51","date_gmt":"2014-07-27T03:31:51","guid":{"rendered":"http:\/\/tubetime.us\/?p=214"},"modified":"2014-07-26T20:31:51","modified_gmt":"2014-07-27T03:31:51","slug":"compensating-crt-deflection-coils","status":"publish","type":"post","link":"https:\/\/tubetime.us\/index.php\/2014\/07\/26\/compensating-crt-deflection-coils\/","title":{"rendered":"Compensating CRT Deflection Coils"},"content":{"rendered":"<p>Things look really weird when you use an uncompensated deflection coil with a vector graphics display. This is because the coil looks like an inductive load to the driver amplifier, and the parasitic capacitance makes it ring. Ringing and overshoot create the strange-looking display, basically extending every line past its destination.<\/p>\n<p><iframe loading=\"lazy\" width=\"500\" height=\"281\" src=\"\/\/www.youtube.com\/embed\/PtxpeOIiFUw\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>One way to compensate for that is to add a series RC snubber in parallel with each deflection coil. You can perform some calculations to figure out the values of the resistor and capacitor but they won&#8217;t get you very close to the answer. There are just too many parasitics to model. It&#8217;s much faster just to build a RC substitution box and tweak the values until you get the result you want.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Things look really weird when you use an uncompensated deflection coil with a vector graphics display. This is because the coil looks like an inductive load to the driver amplifier, and the parasitic capacitance makes it ring. Ringing and overshoot create the strange-looking display, basically extending every line past its destination. One way to compensate [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p80Z1r-3s","_links":{"self":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/214"}],"collection":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/comments?post=214"}],"version-history":[{"count":1,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/214\/revisions"}],"predecessor-version":[{"id":423,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/214\/revisions\/423"}],"wp:attachment":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/media?parent=214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/categories?post=214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/tags?post=214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}