{"id":8049,"date":"2019-10-21T14:06:58","date_gmt":"2019-10-21T13:06:58","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=8049"},"modified":"2019-10-21T14:07:04","modified_gmt":"2019-10-21T13:07:04","slug":"6hs5-triode","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2019\/10\/21\/6hs5-triode\/","title":{"rendered":"6HS5 triode"},"content":{"rendered":"\n

More than 8 years ago, I played with this valve after Thomas Mayer wrote about it here<\/a>. It seemed like a good option but despite a few bench tests, I never got around building an amplifier with it. <\/p>\n\n\n\n

I’m preparing for ETF.19 and will be bringing my eTracer to the event so I built a few socket adaptors. It was the time for the 12-pin Compactron to come to life. <\/p>\n\n\n\n

Through my few Compactron valves, I bumped into the 6HS5 again, so I decided to put it to the mercy of the tracer. I wanted to see the positive grid current behaviour, as haven’t seen curves around with it:<\/p>\n\n\n\n

\"\"
6SH5 triode with positive grid bias.<\/figcaption><\/figure><\/div>\n\n\n\n

What can we say of the above curves? Well this triode could do 7-8W easily as Thomas says. It has an anode power dissipation of 30-35W. The anode slope is between 7 to 10K so local feedback will be needed. You will need to aim for 600-700V bias at least, probably higher with slightly negative bias. However, you will need a hefty source follower to drive the grid. Look at the grid current. It can be 50mA at 5V and creeps up the higher the grid voltage it goes.<\/p>\n\n\n\n

Interesting valve with a 6.3V\/1.5A heater, and the high-mu (80-100) can work out as a SPUD amplifier with local feedback. Driver should be able to handle the grid current and low impedance. Not an easy task though. <\/p>\n","protected":false},"excerpt":{"rendered":"

More than 8 years ago, I played with this valve after Thomas Mayer wrote about it here. It seemed like a good option but despite a few bench tests, I never got around building an amplifier with it. I’m preparing for ETF.19 and will be bringing my eTracer to the event so I built a … Continue reading “6HS5 triode”<\/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":[158,5],"tags":[1228,1229,393,1090,1230],"class_list":["post-8049","post","type-post","status-publish","format-standard","hentry","category-se-designs","category-valves","tag-6hs5","tag-6hs5-triode","tag-class-a2-audio-amplifier","tag-etracer","tag-positive-grid-bias"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-25P","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8049","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=8049"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8049\/revisions"}],"predecessor-version":[{"id":8052,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/8049\/revisions\/8052"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=8049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=8049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=8049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}