{"id":9147,"date":"2021-01-10T20:35:15","date_gmt":"2021-01-10T20:35:15","guid":{"rendered":"https:\/\/www.bartola.co.uk\/valves\/?p=9147"},"modified":"2021-01-10T20:35:15","modified_gmt":"2021-01-10T20:35:15","slug":"01a-low-gain-dht-preamp-finished","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2021\/01\/10\/01a-low-gain-dht-preamp-finished\/","title":{"rendered":"01a Low Gain DHT preamp (finished)"},"content":{"rendered":"

It was a half-hour job to mod my Mule<\/a> preamp by swapping out the UX-120<\/a> and introducing the 01a (CX-301a in fact), add the resistor divider to deliver low gain on this preamp<\/a>:<\/p>\n

\"\"<\/a>
01a mule<\/figcaption><\/figure>\n

I set the valves at 115V\/4mA. The Source Followers are running at 15mA and the resistor divider is actually 100K\u03a9\/33K\u03a9 (Kiwame) which is what I had at hand. It worked like a charm.<\/p>\n

The 01a is driving my Slagle AVC<\/a> into the 300B amplifier<\/a>. I can say I can hear now the subtlety of the thoriated-tungsten filaments of the 01a with the extra level of gain I was hoping for. The amp sounds very dynamic at high level and with the clarity of the 01a.<\/p>\n

\"\"<\/a>
01a mule<\/figcaption><\/figure>\n

This is indeed a clear winner. I will leave this preamp on my system for a while to confirm further impressions. For now, I just simply love it.<\/p>\n","protected":false},"excerpt":{"rendered":"

It was a half-hour job to mod my Mule preamp by swapping out the UX-120 and introducing the 01a (CX-301a in fact), add the resistor divider to deliver low gain on this preamp: I set the valves at 115V\/4mA. The Source Followers are running at 15mA and the resistor divider is actually 100K\u03a9\/33K\u03a9 (Kiwame) which … Continue reading “01a Low Gain DHT preamp (finished)”<\/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":[5],"tags":[10,249,836,186,44,1400,1399,1061],"class_list":["post-9147","post","type-post","status-publish","format-standard","hentry","category-valves","tag-01a","tag-01a-dht","tag-300b-amplifier","tag-dht-preamp","tag-gyrator","tag-low-gain-dht-preamp","tag-low-gain-dht-stage","tag-source-follower"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2r2tK-2nx","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/9147","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=9147"}],"version-history":[{"count":2,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/9147\/revisions"}],"predecessor-version":[{"id":9151,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/posts\/9147\/revisions\/9151"}],"wp:attachment":[{"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/media?parent=9147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/categories?post=9147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bartola.co.uk\/valves\/wp-json\/wp\/v2\/tags?post=9147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}