{"product_id":"5u4-gb-5as4a-ge-international-gray-plates-side-square-getter-matched-pair-tubes-rectifiers-made-in-usa","title":"5U4GB 5AS4A International by GE NOS NIB Gray Plates Side Square Getter Tube Rectifier Made in USA","description":"\u003cp\u003e \u003cstrong\u003e5U4GB 5AS4A International by GE NOS NIB Gray Plates Side Square Getter Tube Rectifier Made in USA\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=\"882\" data-start=\"329\"\u003e The \u003cstrong data-end=\"392\" data-start=\"375\"\u003e5U4GB \/ 5AS4A\u003c\/strong\u003e , manufactured in the USA by \u003cstrong data-end=\"449\" data-start=\"424\"\u003eGeneral Electric (GE)\u003c\/strong\u003e and distributed under the \u003cem data-end=\"491\" data-start=\"476\"\u003eInternational\u003c\/em\u003e brand, is offered in \u003cstrong data-end=\"555\" data-start=\"516\"\u003eNOS NIB (New Old Stock, New in Box)\u003c\/strong\u003e condition.\u003cbr data-end=\"559\" data-start=\"556\"\u003e This valve features \u003cstrong data-end=\"600\" data-start=\"585\"\u003egray plates\u003c\/strong\u003e and \u003cstrong data-end=\"625\" data-start=\"603\"\u003ea side square getter\u003c\/strong\u003e , a typical configuration of GE production from the 1970s, synonymous with robustness and reliability.\u003c\/p\u003e\n\n\u003ch3 data-end=\"931\" data-start=\"884\"\u003e Timbre and performance characteristics\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"1001\" data-start=\"934\"\u003e \n\u003cstrong data-end=\"943\" data-start=\"934\"\u003eBass\u003c\/strong\u003e : Deep and well controlled, with precise articulation.\u003c\/li\u003e\n\n\u003cli data-end=\"1093\" data-start=\"1004\"\u003e\n\n \u003cstrong data-end=\"1012\" data-start=\"1004\"\u003eMids\u003c\/strong\u003e : Balanced and transparent, with clear vocals and well-defined acoustic instruments.\u003c\/li\u003e\n\n\u003cli data-end=\"1167\" data-start=\"1096\"\u003e\n\n \u003cstrong data-end=\"1104\" data-start=\"1096\"\u003eHighs\u003c\/strong\u003e : clean and fluid, never aggressive, with natural brilliance.\u003c\/li\u003e\n\n\u003cli data-end=\"1249\" data-start=\"1170\"\u003e\n\n \u003cstrong data-end=\"1182\" data-start=\"1170\"\u003eDynamics\u003c\/strong\u003e : prompt and stable, with constant power delivery even at full load.\u003c\/li\u003e\n\n\u003cli data-end=\"1329\" data-start=\"1252\"\u003e\n\n \u003cstrong data-end=\"1266\" data-start=\"1252\"\u003eSoundstage\u003c\/strong\u003e : tidy and coherent, with stable and precise sound imaging.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-end=\"1594\" data-start=\"1331\"\u003e 🎧 Use in Hi-Fi Stereo Amplifiers\u003c\/h3\u003e\n\n\u003cp data-end=\"1594\" data-start=\"1331\"\u003e Perfect for high-end tube amplifiers (McIntosh, Dynaco, Audio Research and the like), the 5U4GB GE offers reliable, linear power delivery, enhancing the system's tonal balance and transparency.\u003c\/p\u003e\n\n\u003ch3 data-end=\"1808\" data-start=\"1596\"\u003e 🎸 Use in Music Amplifiers\u003c\/h3\u003e\n\n \u003cp data-end=\"1808\" data-start=\"1596\"\u003eIn guitar amplifiers, it ensures stable headroom and a natural harmonic tone, with warm sustain and dynamic responsiveness, perfect for blues, jazz and vintage rock.\u003c\/p\u003e\n\n\u003ch3 data-end=\"2114\" data-start=\"1810\"\u003e 🎯 Note for audiophiles and technicians\u003c\/h3\u003e\n\n\u003cp data-end=\"2114\" data-start=\"1810\"\u003e This \u003cstrong data-end=\"1924\" data-start=\"1855\"\u003e5U4GB \/ 5AS4A GE Gray Plates Side Square Getter\u003c\/strong\u003e , in \u003cstrong data-end=\"1951\" data-start=\"1940\"\u003eNOS NIB\u003c\/strong\u003e condition, represents a solid and reliable choice. It is the ideal component for ensuring long life and high-level performance, both in hi-fi and musical instruments.\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 = 150 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 145 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 = 145 mA\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 145 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\u003c\/strong\u003e\n\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 – GE USA production, identifiable by 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":55592630026588,"sku":"03172","price":74.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/14_b7502fb5-615d-40e3-b361-6ea277504d4c.jpg?v=1769278155","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/5u4-gb-5as4a-ge-international-gray-plates-side-square-getter-matched-pair-tubes-rectifiers-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}