{"id":1089,"date":"2013-01-19T15:59:07","date_gmt":"2013-01-19T15:59:07","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=1089"},"modified":"2013-01-19T15:59:41","modified_gmt":"2013-01-19T15:59:41","slug":"3a5-dht-continued","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2013\/01\/19\/3a5-dht-continued\/","title":{"rendered":"3A5 DHT (Continued)"},"content":{"rendered":"

Lars requested the paralleled triode curves. Here they are:<\/p>\n

\"3A5<\/a>\u00a0And the SPICE model which is more accurate than my previous version:\"3A5<\/a><\/p>\n

 <\/p>\n

* Created on Sat Jan 19 15:50:19 GMT 2013 using tube.model.finder.PaintKIT
\n* model URL: http:\/\/www.bartola.co.uk\/valves\/
\n* Created by Ale Moglia 2013 valves@bartola.co.uk
\n*————————————————–
\n.SUBCKT TRIODE_3A5-2 SMALL 1 2 3 ; P G K ;
\n+ PARAMS: CCG=.9P CGP=3.2P CCP=1.0P RGI=2000
\n+ MU=12.46 EX=1.3857 KG1=1965.0 KP=132.0 KVB=1.875 VCT=-1.6 ; Vp_MAX=200.0 Ip_MAX=0.032 Vg_step=2.0
\n*————————————————–
\nE1 7 0 VALUE={V(1,3)\/KP*LOG(1+EXP(KP*(1\/MU+(VCT+V(2,3))\/SQRT(KVB+V(1,3)*V(1,3)))))}
\nRE1 7 0 1G
\nG1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))\/KG1}
\nRCP 1 3 1G ; TO AVOID FLOATING NODES
\nC1 2 3 {CCG} ; CATHODE-GRID
\nC2 2 1 {CGP} ; GRID=PLATE
\nC3 1 3 {CCP} ; CATHODE-PLATE
\nD3 5 3 DX ; FOR GRID CURRENT
\nR1 2 5 {RGI} ; FOR GRID CURRENT
\n.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
\n.ENDS
\n*$<\/p><\/blockquote>\n

Looking at distortion, as expected the pair of paralleled triodes performs better than a single triode:<\/p>\n

\"3A5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Lars requested the paralleled triode curves. Here they are: \u00a0And the SPICE model which is more accurate than my previous version:   * Created on Sat Jan 19 15:50:19 GMT 2013 using tube.model.finder.PaintKIT * model URL: http:\/\/www.bartola.co.uk\/valves\/ * Created by Ale Moglia 2013 valves@bartola.co.uk *————————————————– .SUBCKT TRIODE_3A5-2 SMALL 1 2 3 ; P G K … Continue reading “3A5 DHT (Continued)”<\/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":[156,67,24,5],"tags":[303,305,308,304],"class_list":["post-1089","post","type-post","status-publish","format-standard","hentry","category-pre-amplifier-valves","category-thd","category-valve-curve-tracer","category-valves","tag-3a5","tag-3a5-dht","tag-3a5-spice-model","tag-3a5-triode-curves"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-hz","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1089","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=1089"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1089\/revisions"}],"predecessor-version":[{"id":1094,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/1089\/revisions\/1094"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=1089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=1089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=1089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}