{"id":309,"date":"2020-06-27T02:05:35","date_gmt":"2020-06-27T02:05:35","guid":{"rendered":"http:\/\/neomano.com\/index.php\/2020\/06\/27\/vintage-amp-overhaulin\/"},"modified":"2021-06-09T04:07:51","modified_gmt":"2021-06-09T04:07:51","slug":"restauracion-amplificador-a-tubos-vintage-amp","status":"publish","type":"post","link":"https:\/\/neomano.com\/en\/restoration-amplifier-to-tubes-vintage-amp\/","title":{"rendered":"Restoration of tube amplifier. Challenger CHA10. Vintage amp overhaulin &#39;"},"content":{"rendered":"<p>This article does not have much preamble ... The thing is that, as I was already in the wave of vintage amplifiers, I decided to restore one of them that was quite deteriorated: A Challenger CHA10 from the 50s or 60s.<\/p>\n\n\n\n<p>The original idea was to work only on the paint, but then it occurred to me to change the knobs, add a fuse (I didn&#39;t have one), change the position of the logo, add a guitar input using a 1\/4 jack and additionally touch up some components. electronics to add more shine, because the original sound is quite opaque ... Well, finally I also decided to change the tubes as I get them.<\/p>\n\n\n\n<p>Researching the internet I came across a photo of what the amp must have looked like in its prime. The truth is I didn&#39;t like the colors so much.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"386\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/bogen_challenger_cha10-original.jpeg\" alt=\"\" class=\"wp-image-5084\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/bogen_challenger_cha10-original.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/bogen_challenger_cha10-original-300x200.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>Mine, however, was not in such a good state of preservation. This is how the cage was.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"452\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/carcaza-viejo-amplificador-a-tubos.jpeg\" alt=\"\" class=\"wp-image-5110\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/carcaza-viejo-amplificador-a-tubos.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/carcaza-viejo-amplificador-a-tubos-300x234.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>Here are some photos of the chassis.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"433\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/circuito-viejo-amplificador-a-tubos.jpeg\" alt=\"\" class=\"wp-image-5113\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/circuito-viejo-amplificador-a-tubos.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/circuito-viejo-amplificador-a-tubos-300x224.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>As can be seen in the following photo (here I had already dismantled the transformer) use 4 <a href=\"https:\/\/neomano.com\/en\/how-to-replace-a-vacuum-tube-with-solid-state-components\/\" data-type=\"post\" data-id=\"308\" class=\"rank-math-link\">empty tubes<\/a>, including an EZ81 as a rectifier and a 6L6 in the power amp. It is a &quot;single ended&quot;.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"379\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/viejo-amplificador-a-tubos.jpeg\" alt=\"\" class=\"wp-image-5125\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/viejo-amplificador-a-tubos.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/viejo-amplificador-a-tubos-300x196.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"257\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/antiguo-equipo-audio-a-valvulas.jpeg\" alt=\"\" class=\"wp-image-5128\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/antiguo-equipo-audio-a-valvulas.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/antiguo-equipo-audio-a-valvulas-300x133.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>Here is a photo of the amp after the painting process, while testing the color of the knobs (where I am now).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"580\" height=\"433\" src=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/asi-quedo-el-amplificador.jpeg\" alt=\"\" class=\"wp-image-5129\" srcset=\"https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/asi-quedo-el-amplificador.jpeg 580w, https:\/\/neomano.com\/wp-content\/uploads\/2021\/05\/asi-quedo-el-amplificador-300x224.jpeg 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>More photos of the restoration can be seen on the Polestar blog:<\/p>\n\n\n\n<p><a href=\"\/en\/\\&quot;http:\/\/www.opendireito.com\/tecnologia\/item\/49-challenger-cha10-restored.html\\&quot;\/\">http:\/\/www.opendireito.com\/tecnologia\/item\/49-challenger-cha10-restored.html<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Este art\u00edculo no tiene mucho pre\u00e1mbulo&#8230; La cosa es que, como ya estaba en la onda de los<\/p>","protected":false},"author":1,"featured_media":5129,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[69,43],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Restauraci\u00f3n de amplificador a tubos. 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