{"id":134844,"date":"2021-08-10T19:34:44","date_gmt":"2021-08-10T18:34:44","guid":{"rendered":"https:\/\/www.techweekmag.com\/?p=134844"},"modified":"2021-08-10T19:34:44","modified_gmt":"2021-08-10T18:34:44","slug":"fascination-101-tube-power-amplifier-on-triodes-osram-px4","status":"publish","type":"post","link":"https:\/\/www.stereoindex.com\/tech\/hi-fi\/fascination-101-tube-power-amplifier-on-triodes-osram-px4\/","title":{"rendered":"Fascination 101: Tube power amplifier on triodes Osram PX4"},"content":{"rendered":"<p>Maestro Shigeharu Koreeda from Shigeharu audio\u00a0<a href=\"https:\/\/www.stereosound-store.jp\/fs\/ssstore\/tk101_se1\" target=\"_blank\" rel=\"noopener noreferrer\">created the<\/a>\u00a0Fascination 101 tube power amplifier. The power itself is low &#8211; 2\u00a0x\u00a03 W, but the device works even with 4-ohm speakers.\u00a0Fascination 101 is assembled in a compact body in the dimensions of 295x170x150 mm with a polished stainless steel base.\u00a0This is a classic lamp apparatus, assembled by surface mounting in the best traditions of the old school.<\/p>\n<p>The components are also classic.\u00a0The output stage of a simple two-stage circuit uses a PX4 triode in a rare British version made by Osram.\u00a0It operates in self-displacement mode.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2021\/08\/19933d9-11c5-49c7-95bf-0070cba5f687.jpg\" width=\"798\" height=\"472\" \/><figcaption><\/figcaption><\/figure>\n<p>The first stage is a 7-pin MT 6AH6 high gain tube from Toshiba.\u00a0Kemet film capacitors for decoupling the first stage and electrolytic capacitors made of non-magnetic material for filtering the power supply are also responsible for the sound quality.<\/p>\n<div class=\"lfb__wrapper _content\">\n<div id=\"$SO_CL_1\" class=\"lfb__item lfb__item_large\"><\/div>\n<div id=\"$SO_CL_2\" class=\"lfb__item lfb__item_large\"><\/div>\n<\/div>\n<p>The speaker output connectors, as well as the unbalanced RCA input, are located on the top panel of the cabinet.\u00a0The Kasuga wireless output transformer is housed in a cylindrical screen.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2021\/08\/3e96ec1-80e6-4c61-bd67-07849a152620.jpg\" width=\"911\" height=\"478\" \/><figcaption><\/figcaption><\/figure>\n<p>Amplifier applications are accepted until January 5th.\u00a0The cost of Fascination 101, including taxes, will be 470,000 yen.<\/p>\n<p>[ratemypost]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Maestro Shigeharu Koreeda from Shigeharu audio\u00a0created the\u00a0Fascination 101 tube power amplifier. The power itself is low &#8211; 2\u00a0x\u00a03 W, but the device works even with 4-ohm speakers.\u00a0Fascination 101 is assembled in a compact body in the dimensions of 295x170x150 mm with a polished stainless steel base.\u00a0This is a classic lamp apparatus, assembled by surface mounting [&hellip;] <a class=\"g1-link g1-link-more\" href=\"https:\/\/www.stereoindex.com\/tech\/hi-fi\/fascination-101-tube-power-amplifier-on-triodes-osram-px4\/\">More<\/a><\/p>\n","protected":false},"author":10404,"featured_media":134848,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[642],"tags":[779],"class_list":{"0":"post-134844","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-hi-fi","8":"tag-news"},"acf":[],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts\/134844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/users\/10404"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/comments?post=134844"}],"version-history":[{"count":0,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts\/134844\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/media\/134848"}],"wp:attachment":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/media?parent=134844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/categories?post=134844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/tags?post=134844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}