{"product_id":"5u4gb-5as4a-nos-nib-toshiba-international-black-plates-matched-pair-tubes-top-side-halo-getter-rectifiers-made-in-japan-copia","title":"5U4GB 5AS4A NOS NIB MATSUSHITA \/ International Black Plates Tube Top Side Halo Getter Rectifier Made in JAPAN","description":"\u003cp\u003e \u003cstrong\u003e5U4GB 5AS4A NOS NIB International by MATSUSHITA Black Plates Tube Top Side Halo Getter Rectifier Made in JAPAN\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cem\u003eNote: Price refers to one selected valve\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"964\" data-start=\"384\"\u003e The \u003cstrong data-end=\"447\" data-start=\"430\"\u003e5U4GB \/ 5AS4A\u003c\/strong\u003e , produced in Japan by \u003cstrong data-end=\"487\" data-start=\"473\"\u003eMatsushita\u003c\/strong\u003e and distributed under the \u003cem data-end=\"543\" data-start=\"514\"\u003eInternational\u003c\/em\u003e brand, is offered in \u003cstrong data-end=\"607\" data-start=\"568\"\u003eNOS NIB (New Old Stock, New in Box)\u003c\/strong\u003e condition with \u003cstrong data-end=\"631\" data-start=\"615\"\u003eblack plates\u003c\/strong\u003e and \u003cstrong data-end=\"658\" data-start=\"634\"\u003etop side halo getter.\u003c\/strong\u003e This tube testifies to the quality and reliability of the Japanese construction school between the late 1960s and early 1970s.\u003c\/p\u003e\n\n \u003cp data-end=\"1013\" data-start=\"966\"\u003e\u003cstrong data-end=\"1011\" data-start=\"968\"\u003eTimbre and performance characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"1090\" data-start=\"1016\"\u003e\n\n \u003cstrong data-end=\"1025\" data-start=\"1016\"\u003eBass\u003c\/strong\u003e : tight and well-defined, with excellent control of the low register.\u003c\/li\u003e\n\n\u003cli data-end=\"1186\" data-start=\"1093\"\u003e\n\n \u003cstrong data-end=\"1101\" data-start=\"1093\"\u003eMids\u003c\/strong\u003e : natural and transparent, with voices and instruments delivered with clarity and realism.\u003c\/li\u003e\n\n\u003cli data-end=\"1256\" data-start=\"1189\"\u003e\n\n \u003cstrong data-end=\"1197\" data-start=\"1189\"\u003eHighs\u003c\/strong\u003e : Clean and bright, never harsh, with fine detail.\u003c\/li\u003e\n\n\u003cli data-end=\"1344\" data-start=\"1259\"\u003e\n\n \u003cstrong data-end=\"1271\" data-start=\"1259\"\u003eDynamics\u003c\/strong\u003e : well-proportioned and stable, with smooth and safe power delivery under load.\u003c\/li\u003e\n\n\u003cli data-end=\"1424\" data-start=\"1347\"\u003e\n\n \u003cstrong data-end=\"1361\" data-start=\"1347\"\u003eSoundstage\u003c\/strong\u003e : tidy and coherent, with stable and precise sound imaging.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"1716\" data-start=\"1426\"\u003e 🎧 \u003cstrong data-end=\"1466\" data-start=\"1429\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e \u003cbr data-end=\"1469\" data-start=\"1466\"\u003ePerfect for reference amplifiers that use the 5U4GB \/ 5AS4A as a rectifier (McIntosh, Dynaco, Audio Research and the like), these Matsushitas offer linear, quiet and long-lasting power supplies, ideal for high-end systems.\u003c\/p\u003e\n\n\u003cp data-end=\"1932\" data-start=\"1718\"\u003e 🎸 \u003cstrong data-end=\"1754\" data-start=\"1721\"\u003eUse in Music Amplifiers\u003c\/strong\u003e\u003cbr data-end=\"1757\" data-start=\"1754\"\u003e In musical settings, it guarantees a prompt and harmonically rich response, with natural sustain and stable headroom, enhancing both clean and saturation sounds.\u003c\/p\u003e\n\n\u003cp data-end=\"2266\" data-start=\"1934\"\u003e 🎯 \u003cstrong data-end=\"1969\" data-start=\"1937\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e\u003cbr data-end=\"1972\" data-start=\"1969\"\u003e This \u003cstrong data-end=\"2038\" data-start=\"1979\"\u003e5U4GB \/ 5AS4A Matsushita Black Plates\u003c\/strong\u003e is a very interesting tube for those looking for a solid and quiet rectifier. These NOS NIB Japanese tubes with the International brand are ideal both as a valuable replacement and as a reserve for collectors and enthusiasts.\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n \u003cp\u003e\u003cstrong\u003eTubes Tested\u003c\/strong\u003e on \u003cstrong\u003eFunke W19\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eVoltage Test:\u003c\/strong\u003e Va = 100V, Vf = 5V \u003cstrong\u003e\u003cbr\u003eGood from:\u003c\/strong\u003e Ia = 78 mA \u003cstrong\u003e\u003cbr\u003eAverage 100%:\u003c\/strong\u003e Ia = 120 mA \u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003c\/strong\u003e VERY STRONG\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 1\u003c\/strong\u003e :\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1\u003c\/strong\u003e : Ia = 136 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 135 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 2\u003c\/strong\u003e :\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1\u003c\/strong\u003e : Ia = 140 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 138 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdiv\u003e\n\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eOperation:\u003c\/strong\u003e Stable valve, quiet in operation, and suitable for regular and controlled power supply. Tested with a Funke W19 tester.\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box.\u003cstrong\u003e \u003cbr\u003e\n\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e \u003cspan\u003eVery good – Clearly legible writing with minor signs of wear, no obvious defects. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eManufacturing Code:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eUnreadable – Made by MATSUSHITA JAPAN, identifiable by its construction features. 1970s\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"INTERNATIONAL","offers":[{"title":"Default Title","offer_id":55591528595804,"sku":"03170","price":79.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/14_058290db-1ffd-4a13-9d34-a4e3f974d61e.jpg?v=1769276860","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/5u4gb-5as4a-nos-nib-toshiba-international-black-plates-matched-pair-tubes-top-side-halo-getter-rectifiers-made-in-japan-copia","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}