{"product_id":"5v4g-gz32-rca-st-shape-black-plates-bottom-square-getter-tested-tube-made-in-usa-57-copia","title":"5V4G GZ32 SILVERTONE ST Shape Black Plates Bottom Square Getter Tested Tube Made in USA '51","description":"\u003cp\u003e\u003cstrong\u003e5V4G GZ32 SILVERTONE by Sylvania ST Shape Black Plates Bottom Square Getter Tested Tube Made in USA '51\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"584\" data-start=\"222\"\u003eThe \u003cstrong data-end=\"261\" data-start=\"225\"\u003eSilvertone-branded 5V4G\/GZ32\u003c\/strong\u003e , produced in 1951 by \u003cstrong data-end=\"296\" data-start=\"284\"\u003eSylvania\u003c\/strong\u003e for the audio line of \u003cstrong data-end=\"343\" data-start=\"319\"\u003eSears, Roebuck \u0026amp; Co.\u003c\/strong\u003e , features the classic \u003cstrong data-end=\"394\" data-start=\"376\"\u003eST bottle\u003c\/strong\u003e structure, well-machined vertical \u003cstrong data-end=\"412\" data-start=\"396\"\u003eblack plates\u003c\/strong\u003e and \u003cstrong data-end=\"466\" data-start=\"438\"\u003esquare getter at the bottom\u003c\/strong\u003e . It is one of the most musical and transparent versions of the first post-war generation American rectifiers.\u003c\/p\u003e\n\u003cp data-end=\"969\" data-start=\"586\"\u003ePrized for its combination of \u003cstrong data-end=\"648\" data-start=\"624\"\u003eelectrical robustness\u003c\/strong\u003e , \u003cstrong data-end=\"675\" data-start=\"650\"\u003etonal refinement\u003c\/strong\u003e and \u003cstrong data-end=\"717\" data-start=\"678\"\u003enatural current decay\u003c\/strong\u003e , this valve is particularly suited to \u003cstrong data-end=\"793\" data-start=\"761\"\u003ehigh-sensitivity systems\u003c\/strong\u003e , \u003cstrong data-end=\"823\" data-start=\"795\"\u003ehigh-end hi-fi restorations\u003c\/strong\u003e or \u003cstrong data-end=\"843\" data-start=\"826\"\u003edriver stages\u003c\/strong\u003e where the quality of the rectification is directly reflected in the dynamic response and articulation of the audio signal.\u003c\/p\u003e\n\u003cp data-end=\"1253\" data-start=\"976\"\u003e\u003cstrong data-end=\"985\" data-start=\"976\"\u003eBass\u003c\/strong\u003e : elegant and natural. The low range is distinguished by \u003cstrong data-end=\"1064\" data-start=\"1040\"\u003eroundness and coherence\u003c\/strong\u003e , with a response that favors harmony rather than impact. There is no compression or swelling, but an “analog” presence that enriches the musical base with warmth and depth.\u003c\/p\u003e\n\u003cp data-end=\"1539\" data-start=\"1255\"\u003e\u003cstrong data-end=\"1263\" data-start=\"1255\"\u003eMids\u003c\/strong\u003e : velvety and musical. The mid frequencies are the strong point of this 5V4G, with a \u003cstrong data-end=\"1386\" data-start=\"1355\"\u003esoft, fluid and refined\u003c\/strong\u003e performance. The voices are \u003cstrong data-end=\"1426\" data-start=\"1406\"\u003ewarm and present\u003c\/strong\u003e , with an emotional texture that recalls the sound of 50s hi-fi systems, but without loss of definition.\u003c\/p\u003e\n\u003cp data-end=\"1827\" data-start=\"1541\"\u003e\u003cstrong data-end=\"1549\" data-start=\"1541\"\u003eHighs\u003c\/strong\u003e : soft and airy. The high range extends \u003cstrong data-end=\"1628\" data-start=\"1602\"\u003edelicately and without grain\u003c\/strong\u003e , offering a discreet brilliance and a feeling of airiness that accompanies listening without tiring. Excellent rendering of secondary details, particularly in reverberations and natural harmonics.\u003c\/p\u003e\n\u003cp data-end=\"2083\" data-start=\"1829\"\u003e\u003cstrong data-end=\"1841\" data-start=\"1829\"\u003eDynamics\u003c\/strong\u003e : progressive and not aggressive. The transient response is \u003cstrong data-end=\"1927\" data-start=\"1901\"\u003egradual and controlled\u003c\/strong\u003e , with an expressive and natural microdynamics. The behavior is \u003cstrong data-end=\"2005\" data-start=\"1993\"\u003emusical\u003c\/strong\u003e , closer to a European GZ32 than to an aggressive American rectifier.\u003c\/p\u003e\n\u003cp data-end=\"2315\" data-start=\"2085\"\u003e\u003cstrong data-end=\"2099\" data-start=\"2085\"\u003eSoundstage\u003c\/strong\u003e : extended and deep. The soundstage opens with \u003cstrong data-end=\"2171\" data-start=\"2148\"\u003efluidity and coherence\u003c\/strong\u003e , offering an orderly three-dimensional image, with \u003cstrong data-end=\"2256\" data-start=\"2224\"\u003eexcellent separation of the planes\u003c\/strong\u003e and \u003cstrong data-end=\"2314\" data-start=\"2259\"\u003erealistic presence of the recording environments\u003c\/strong\u003e .\u003c\/p\u003e\n\u003cp data-end=\"2727\" data-start=\"2322\"\u003e🎧 \u003cstrong data-end=\"2382\" data-start=\"2325\"\u003eUse in Headphone Amplifiers and Driver Stages Hi-Fi\u003c\/strong\u003e \u003cbr data-end=\"2385\" data-start=\"2382\"\u003eAn excellent choice for low-current tube power supplies, high-end preamps or tube DACs, where \u003cstrong data-end=\"2561\" data-start=\"2510\"\u003etonal finesse and low noise\u003c\/strong\u003e are essential. Ideal with reference headphones that value \u003cstrong data-end=\"2658\" data-start=\"2628\"\u003esignal delicacy\u003c\/strong\u003e , such as \u003cstrong data-end=\"2679\" data-start=\"2665\"\u003ethe ZMF Verité\u003c\/strong\u003e , \u003cstrong data-end=\"2697\" data-start=\"2681\"\u003eAudeze LCD-4\u003c\/strong\u003e or \u003cstrong data-end=\"2726\" data-start=\"2700\"\u003eAudio-Technica ADX5000\u003c\/strong\u003e .\u003c\/p\u003e\n\u003cp data-end=\"3072\" data-start=\"2729\"\u003e🎸 \u003cstrong data-end=\"2777\" data-start=\"2732\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e \u003cbr data-end=\"2780\" data-start=\"2777\"\u003eLess common in guitar, but perfect in \u003cstrong data-end=\"2858\" data-start=\"2839\"\u003elow-power\u003c\/strong\u003e amps or \u003cstrong data-end=\"2891\" data-start=\"2861\"\u003evintage studio circuits\u003c\/strong\u003e , where you want \u003cstrong data-end=\"2938\" data-start=\"2911\"\u003ea smooth sag\u003c\/strong\u003e , \u003cstrong data-end=\"2965\" data-start=\"2940\"\u003enatural compression\u003c\/strong\u003e and a sweet attack. Great for jazz, fingerstyle, nuanced cleans and organic vintage tones.\u003c\/p\u003e\n\u003cp data-end=\"3388\" data-start=\"3074\"\u003e🎯 \u003cstrong data-end=\"3109\" data-start=\"3077\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e\u003cbr data-end=\"3112\" data-start=\"3109\"\u003eA \u003cstrong data-end=\"3167\" data-start=\"3131\"\u003erefined rectifier with a romantic soul\u003c\/strong\u003e , which combines the aesthetic charm of the ST shape with the \u003cstrong data-end=\"3245\" data-start=\"3220\"\u003esweet and musical voice\u003c\/strong\u003e typical of vintage Sylvania production. Ideal for author restorations, low-power systems and lovers of \u003cstrong data-end=\"3387\" data-start=\"3357\"\u003etransparency without harshness\u003c\/strong\u003e .\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTubes Tested\u003c\/strong\u003e on \u003cstrong\u003eFunke W19\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\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\u003eAverage 100%:\u003c\/strong\u003e Ia = 84.6 mA \u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003c\/strong\u003e VERY STRONG\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve\u003c\/strong\u003e :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1\u003c\/strong\u003e : Ia = 70 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2\u003c\/strong\u003e : Ia = 70 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low Noise \u0026amp; Microphonics – Tested and rated for use in hi-fi systems and guitar amplifiers.\u003c\/span\u003e\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 Vintage Tubes - Tested and in perfect working order. Supplied in our custom box for optimum protection.\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\u003eGood – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 152 - Manufacturing SYLVANIA USA. 52nd week of 1951.\u003c\/li\u003e\n\u003c\/ul\u003e\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":"SILVERTONE","offers":[{"title":"Default Title","offer_id":54738479513948,"sku":"02971U","price":34.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_4960918d-62d2-46e5-a6a9-6df42f5d1326.jpg?v=1749734492","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/5v4g-gz32-rca-st-shape-black-plates-bottom-square-getter-tested-tube-made-in-usa-57-copia","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}