{"product_id":"5v3a-5au4-rca-nos-nib-black-plates-round-getter-rectifier-tube-amplitrex-tested-made-in-usa","title":"5V3A 5AU4 RCA NOS NIB Black Plates Round Getter Rectifier Tube - Amplitrex Tested - Made in USA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003e5V3A 5AU4 RCA NOS NIB Black Plates Round Getter Rectifier Tube - Amplitrex Tested - Made in USA\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"642\" data-start=\"169\"\u003e\u003cmeta charset=\"utf-8\"\u003e The \u003cstrong data-start=\"191\" data-end=\"210\"\u003eRCA 5V3A \/ 5AU4\u003c\/strong\u003e , made in the USA, is a double half-wave rectifier developed to ensure \u003cstrong data-start=\"304\" data-end=\"347\"\u003erobustness and stability of power supplies\u003c\/strong\u003e in hi-fi amplifiers, broadcast equipment and professional systems.\u003cbr data-start=\"422\" data-end=\"425\"\u003eThis example is \u003cstrong data-start=\"444\" data-end=\"484\"\u003eNOS NIB (New Old Stock – New in Box)\u003c\/strong\u003e and features \u003cstrong data-start=\"496\" data-end=\"512\"\u003eblack plates\u003c\/strong\u003e with \u003cstrong data-start=\"517\" data-end=\"533\"\u003eround getters\u003c\/strong\u003e , a typical configuration of high-end RCA productions. \u003cbr data-start=\"593\" data-end=\"596\"\u003eIt has been thoroughly \u003cstrong data-start=\"618\" data-end=\"651\"\u003etested with Amplitrex AT-1000\u003c\/strong\u003e , ensuring strong output, no shorts and full operational efficiency.\u003c\/p\u003e\n\u003ch3 data-end=\"1010\" data-start=\"956\"\u003eTimbral characteristics and sound behavior\u003c\/h3\u003e\n\u003cp data-start=\"794\" data-end=\"907\"\u003e\u003cstrong data-start=\"794\" data-end=\"804\"\u003eBass:\u003c\/strong\u003e full and controlled, with a solid base that gives authority to the sound, without unwanted bloat.\u003c\/p\u003e\n\u003cp data-start=\"910\" data-end=\"1017\"\u003e\u003cstrong data-start=\"910\" data-end=\"919\"\u003eMids:\u003c\/strong\u003e Transparent and natural, with well-defined voices and acoustic instruments rendered with harmonic richness.\u003c\/p\u003e\n\u003cp data-start=\"1020\" data-end=\"1130\"\u003e\u003cstrong data-start=\"1020\" data-end=\"1029\"\u003eHighs:\u003c\/strong\u003e smooth and airy, free from harshness, with a clear extension that gives brilliance to the soundstage.\u003c\/p\u003e\n\u003cp data-start=\"1133\" data-end=\"1255\"\u003e\u003cstrong data-start=\"1133\" data-end=\"1146\"\u003eDynamics:\u003c\/strong\u003e fast and coherent, capable of rendering both micro details and the most complex peaks with stability.\u003c\/p\u003e\n\u003cp data-start=\"1258\" data-end=\"1370\"\u003e\u003cstrong data-start=\"1258\" data-end=\"1273\"\u003eSoundstage:\u003c\/strong\u003e wide, stable and three-dimensional, with well-defined instrument separation and a silent background.\u003c\/p\u003e\n\u003ch3 data-end=\"2004\" data-start=\"1971\"\u003e🎧 Use in Hi-Fi amplifiers\u003c\/h3\u003e\n\u003cp data-end=\"2283\" data-start=\"2006\"\u003e\u003cmeta charset=\"utf-8\"\u003e Ideal for high-end stereo amplifiers and vintage preamps, where the stability of the rectification contributes to a more dynamic, detailed and noise-free sound.\u003c\/p\u003e\n\u003ch3 data-end=\"2340\" data-start=\"2290\"\u003e🎸 Use in musical instrument amplifiers\u003c\/h3\u003e\n\u003cp data-end=\"2639\" data-start=\"2342\"\u003e\u003cmeta charset=\"utf-8\"\u003e Perfect for instrument amplifiers and vintage organs, where it provides stable current, increased headroom and a clean, focused sound output.\u003c\/p\u003e\n\u003ch3 data-end=\"2681\" data-start=\"2646\"\u003e🎯 Note for audiophiles and technicians\u003c\/h3\u003e\n\u003cp data-end=\"3065\" data-start=\"2683\"\u003e\u003cmeta charset=\"utf-8\"\u003e The \u003cstrong data-end=\"1892\" data-start=\"1843\"\u003eRCA 5V3A \/ 5AU4 Black Plates with round getter\u003c\/strong\u003e is a rectifier highly appreciated for its ability to combine \u003cstrong data-end=\"2015\" data-start=\"1964\"\u003eelectrical reliability and elegant musical performance\u003c\/strong\u003e .\u003cbr data-end=\"2019\" data-start=\"2016\"\u003eThe proposed specimen is \u003cstrong data-end=\"2072\" data-start=\"2042\"\u003eNOS NIB and Amplitrex Tested\u003c\/strong\u003e , to guarantee full functionality, uniformity and long life. \u003cbr data-end=\"2137\" data-start=\"2134\"\u003eAn excellent option for both \u003cstrong data-end=\"2190\" data-start=\"2167\"\u003ephilological restorations\u003c\/strong\u003e and \u003cstrong data-end=\"2233\" data-start=\"2199\"\u003ehigh-end hi-fi systems\u003c\/strong\u003e .\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eValves tested on \u003cstrong\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-end=\"2072\" data-start=\"2042\"\u003eAmplitrex AT-1000\u003c\/strong\u003e\u003c\/span\u003e\u003c\/strong\u003e Tube tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"1728\" data-start=\"1691\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 278V, Vf = 5V\u003c\/span\u003e\u003cbr\u003e\u003c\/li\u003e\n\u003cli data-end=\"1786\" data-start=\"1731\"\u003eDirect drop: \u003cstrong data-end=\"1784\" data-start=\"1747\"\u003e23–24 V peak (balanced sections)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-end=\"1834\" data-start=\"1789\"\u003eReverse hold: \u003cstrong data-end=\"1832\" data-start=\"1805\"\u003e396–397 V peak (excellent)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-end=\"1894\" data-start=\"1837\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003ePlate current:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan\u003eIa = 120 mA\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan\u003eIa = 120 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003ePlate current:\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAdditional Tests\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Standard. Tested and approved for use in hi-fi and guitar amplifiers.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eExcellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\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\u003eConditions:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eNOS - NIB - New Old Stock, New In Box - Tested and working - Supplied 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\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\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eBP - Manufactured in July 1967\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u0026nbsp;\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":"RCA","offers":[{"title":"Default Title","offer_id":55334297960796,"sku":"03071V","price":22.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_cc92bdb4-2f6b-4bfa-973e-94f1c177fa1f.jpg?v=1756283817","url":"https:\/\/vacuumtubestreasures.com\/en-nl\/products\/5v3a-5au4-rca-nos-nib-black-plates-round-getter-rectifier-tube-amplitrex-tested-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}