{"product_id":"5y4ga-sylvania-nos-nib-black-plates-halo-getter-rectifier-tube-made-in-usa","title":"5Y4GA SYLVANIA NOS NIB Black Plates Halo Getter Rectifier Tube Made in USA","description":"\u003cp\u003e\u003cstrong\u003e5Y4GA SYLVANIA NOS NIB Black Plates Halo Getter Rectifier Tube Made in USA\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"721\" data-start=\"0\"\u003eThis \u003cstrong data-end=\"55\" data-start=\"37\"\u003e5Y4GA SYLVANIA\u003c\/strong\u003e , \u003cstrong data-end=\"97\" data-start=\"57\"\u003eNOS NIB (New Old Stock – New In Box)\u003c\/strong\u003e , \u003cstrong data-end=\"114\" data-start=\"99\"\u003eMade in USA\u003c\/strong\u003e , is a high quality American straightener, belonging to the series with \u003cstrong data-end=\"208\" data-start=\"192\"\u003eblack plates\u003c\/strong\u003e and \u003cstrong data-end=\"226\" data-start=\"211\"\u003ehalo getter\u003c\/strong\u003e , one of the most reliable and long-lasting configurations of Sylvania production.\u003cbr data-end=\"307\" data-start=\"304\"\u003eDesigned for stable and long-lasting tube power supplies, the 5Y4GA is highly regarded in hi-fi and vintage equipment restoration. \u003cbr data-end=\"455\" data-start=\"452\"\u003eIn accordance with our operating standards, \u003cstrong data-end=\"572\" data-start=\"499\"\u003erectifier tubes are always tested with FUNKE W19 testers\u003c\/strong\u003e : this example reported a \u003cstrong data-end=\"637\" data-start=\"617\"\u003eVERY STRONG TEST\u003c\/strong\u003e result, confirming excellent output, smooth operation and no shorts or gases.\u003c\/p\u003e\n\u003cp data-end=\"928\" data-start=\"723\"\u003e\u003cstrong data-end=\"751\" data-start=\"725\"\u003eSound Characteristics\u003c\/strong\u003e\u003cbr data-end=\"754\" data-start=\"751\"\u003eLike all quality rectifiers, the 5Y4GA affects the overall character of the amplifier, affecting the stability of the power supply and the dynamic response.\u003c\/p\u003e\n\u003cp data-end=\"1082\" data-start=\"930\"\u003e\u003cstrong data-end=\"939\" data-start=\"930\"\u003eBass\u003c\/strong\u003e\u003cbr data-end=\"942\" data-start=\"939\"\u003eSolid, controlled, and well-structured. The power supply remains stable even under load, contributing to a tidy and consistent low end.\u003c\/p\u003e\n\u003cp data-end=\"1225\" data-start=\"1084\"\u003e\u003cstrong data-end=\"1092\" data-start=\"1084\"\u003eMedium\u003c\/strong\u003e\u003cbr data-end=\"1095\" data-start=\"1092\"\u003eClean and natural. The well-adjusted tension favors a clear midrange, with excellent intelligibility of voices and instruments.\u003c\/p\u003e\n\u003cp data-end=\"1363\" data-start=\"1227\"\u003e\u003cstrong data-end=\"1235\" data-start=\"1227\"\u003eHigh\u003c\/strong\u003e\u003cbr data-end=\"1238\" data-start=\"1235\"\u003eNeat and free of harshness. The halo getter contributes to a smooth harmonic reproduction, without introducing harshness or irregularities.\u003c\/p\u003e\n\u003cp data-end=\"1516\" data-start=\"1365\"\u003e\u003cstrong data-end=\"1377\" data-start=\"1365\"\u003eDynamics\u003c\/strong\u003e\u003cbr data-end=\"1380\" data-start=\"1377\"\u003eProgressive and reliable. Typical response of directly heated rectifiers, with good elasticity and transient control.\u003c\/p\u003e\n\u003cp data-end=\"1660\" data-start=\"1518\"\u003e\u003cstrong data-end=\"1532\" data-start=\"1518\"\u003eSoundstage\u003c\/strong\u003e\u003cbr data-end=\"1535\" data-start=\"1532\"\u003eStable and well-focused sound image. Proper rectification helps improve separation and perceived depth.\u003c\/p\u003e\n\u003cp data-end=\"1718\" data-start=\"1662\"\u003e🎧 \u003cstrong data-end=\"1702\" data-start=\"1665\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\u003cbr data-end=\"1705\" data-start=\"1702\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul data-end=\"1879\" data-start=\"1719\"\u003e\n\u003cli data-end=\"1784\" data-start=\"1719\"\u003e\n\u003cp data-end=\"1784\" data-start=\"1721\"\u003e5Y4GA-compatible single-ended and push-pull amplifiers,\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1834\" data-start=\"1785\"\u003e\n\u003cp data-end=\"1834\" data-start=\"1787\"\u003etube-powered preamplifiers,\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1879\" data-start=\"1835\"\u003e\n\u003cp data-end=\"1879\" data-start=\"1837\"\u003evintage American and European appliances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1974\" data-start=\"1881\"\u003eSuitable for systems that prioritize reliability, timbral consistency and musicality over time.\u003c\/p\u003e\n\u003cp data-end=\"2030\" data-start=\"1976\"\u003e🎸 \u003cstrong data-end=\"2011\" data-start=\"1979\"\u003eUse in Music Applications\u003c\/strong\u003e\u003cbr data-end=\"2014\" data-start=\"2011\"\u003eAppreciated in:\u003c\/p\u003e\n\u003cul data-end=\"2215\" data-start=\"2031\"\u003e\n\u003cli data-end=\"2082\" data-start=\"2031\"\u003e\n\u003cp data-end=\"2082\" data-start=\"2033\"\u003eguitar amplifiers and vintage instruments,\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2163\" data-start=\"2083\"\u003e\n\u003cp data-end=\"2163\" data-start=\"2085\"\u003ecircuits that benefit from a softer and more progressive dynamic response,\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2215\" data-start=\"2164\"\u003e\n\u003cp data-end=\"2215\" data-start=\"2166\"\u003ephilological restoration of vintage equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2297\" data-start=\"2217\"\u003e🎯 \u003cstrong data-end=\"2252\" data-start=\"2220\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e \u003cbr data-end=\"2255\" data-start=\"2252\"\u003e\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2760\" data-start=\"2494\"\u003eA high-end rectifier, ideal for preserving or improving the power supply behavior in vintage tube amplifiers and quality hi-fi.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eValve tested on \u003cstrong\u003eFunke W19\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e \u003cspan\u003eVa = 100V ; Vf = 5.0V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIa = 92 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIa = 90 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIa = 93 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\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\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - NIB - New Old Stock, New In Box - Tested and working - In original box.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAesthetic conditions:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e Excellent – Perfectly preserved writing, minimal signs of wear. See photos. The original packaging is badly damaged.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e Unreadable – Made by SYLVANIA USA, identifiable by its construction features. 1960s\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":56275142213980,"sku":"03322","price":29.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_e61cbbc3-430e-49d3-8a6d-d24aef1d2ec4.jpg?v=1766066421","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/5y4ga-sylvania-nos-nib-black-plates-halo-getter-rectifier-tube-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}