{"product_id":"5v4ga-sylvania-nos-black-plates-halo-getter-rectifier-tube-made-in-usa","title":"5V4GA SYLVANIA NOS Black Plates Halo Getter Rectifier Tube Made in USA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003e5V4GA SYLVANIA NOS Black Plates Halo Getter Rectifier Tube Made in USA\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"429\" data-start=\"26\"\u003e The \u003cstrong data-end=\"51\" data-start=\"29\"\u003e5V4GA SYLVANIA NOS\u003c\/strong\u003e is a high-quality full-wave rectifier tube, manufactured in the USA according to the most stringent industry standards of the golden age of the vacuum tube. This version with \u003cstrong data-end=\"261\" data-start=\"245\"\u003eblack plates\u003c\/strong\u003e and \u003cstrong data-end=\"279\" data-start=\"264\"\u003ehalo getter\u003c\/strong\u003e represents one of Sylvania's most prized achievements for its operational stability, long-term reliability, and controlled electrical behavior.\u003c\/p\u003e\n\n \u003cp data-end=\"791\" data-start=\"431\"\u003eThis is a \u003cstrong data-end=\"480\" data-start=\"457\"\u003eNOS (New Old Stock)\u003c\/strong\u003e model, never used, carefully tested in our laboratory to ensure performance fully compliant with the original specifications. The robust construction and attention to materials make it ideal for high-quality hi-fi applications and for philologically correct restorations of vintage American equipment.\u003c\/p\u003e\n\n\u003ch3 data-end=\"824\" data-start=\"798\"\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"969\" data-start=\"826\"\u003e \u003cstrong data-end=\"835\" data-start=\"826\"\u003eBass:\u003c\/strong\u003e Solid and well-anchored, with a stable delivery that contributes to a sense of control and authority from the amplifier.\u003c\/p\u003e\n\n\u003cp data-end=\"1086\" data-start=\"971\"\u003e \u003cstrong data-end=\"979\" data-start=\"971\"\u003eMids:\u003c\/strong\u003e Clean and natural, they promote a balanced musical performance, without compression or artificial stiffness.\u003c\/p\u003e\n\n\u003cp data-end=\"1219\" data-start=\"1088\"\u003e \u003cstrong data-end=\"1096\" data-start=\"1088\"\u003eHighs:\u003c\/strong\u003e Neat and flowing, never aggressive, with a contribution that favors timbre coherence and listening fluidity.\u003c\/p\u003e\n\n \u003cp data-end=\"1434\" data-start=\"1221\"\u003e\u003cstrong data-end=\"1233\" data-start=\"1221\"\u003eDynamics:\u003c\/strong\u003e Progressive and reliable: the 5V4GA Sylvania offers a well-managed voltage rise, ideal for preserving the life of the downstream tubes and ensuring harmonious operation of the entire circuit.\u003c\/p\u003e\n\n\u003cp data-end=\"1592\" data-start=\"1436\"\u003e \u003cstrong data-end=\"1450\" data-start=\"1436\"\u003eSoundstage:\u003c\/strong\u003e Contributes to a stable and well-focused soundstage, thanks to its ability to maintain a constant and unstable power supply.\u003c\/p\u003e\n\n\u003ch3 data-end=\"1632\" data-start=\"1599\"\u003e \u003cstrong\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"1914\" data-start=\"1633\"\u003e Suitable for 5V4GA \/ 5V4G compatible amplifiers, where a reliable, predictable, and musically balanced rectifier is required. Particularly popular in vintage American designs and modern creations inspired by classical tradition.\u003c\/p\u003e\n\n\u003ch3 data-end=\"1951\" data-start=\"1916\"\u003e \u003cstrong\u003e🎸 Use in Music Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"2108\" data-start=\"1952\"\u003e Also suitable for instrument amplifiers requiring stable rectification and controlled dynamic response, without artificial emphasis.\u003c\/p\u003e\n\n \u003ch3 data-end=\"2150\" data-start=\"2115\"\u003e\u003cstrong\u003e🎯 Note for audiophiles and technicians\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2263\" data-start=\"2230\"\u003e an original American specimen,\u003c\/li\u003e\n\n\u003cli data-end=\"2313\" data-start=\"2266\"\u003e a build with black plates and halo getter,\u003c\/li\u003e\n\n\u003cli data-end=\"2357\" data-start=\"2316\"\u003e electrical reliability and sonic coherence,\u003c\/li\u003e\n\n\u003cli data-end=\"2445\" data-start=\"2360\"\u003e a rectifier tube that enhances the overall balance of the amplifier. \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2592\" data-start=\"2447\"\u003e A selected \u003cstrong data-end=\"2504\" data-start=\"2478\"\u003eVacuum Tubes Treasures\u003c\/strong\u003e rectifier, conceived not as a simple component, but as an integral part of the sound experience.\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 = 60V, Vf = 5V \u003cstrong\u003e\u003cbr\u003eGood from:\u003c\/strong\u003e Ia = 55 mA \u003cstrong\u003e\u003cbr\u003e100% average:\u003c\/strong\u003e Ia = 84.6 mA \u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003c\/strong\u003e VERY STRONG\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve\u003c\/strong\u003e :\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1\u003c\/strong\u003e : Ia = 68 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 70 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\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Standard. Tested and approved for use in hi-fi and guitar amplifiers.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\n\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 - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.\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\u003eCosmetic condition:\u003c\/strong\u003e \u003cspan\u003eExcellent – ​​Excellently preserved lettering, minimal signs of wear. 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:\u003c\/strong\u003e Unreadable, identifiable by construction features. 1960s\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":56578397602140,"sku":"03389","price":39.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_b6670936-43fb-4245-9db6-9d533f11176d.jpg?v=1769536059","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/5v4ga-sylvania-nos-black-plates-halo-getter-rectifier-tube-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}