{"product_id":"12at7-wa-e81cc-sylvania-nos-3-mica-gray-wing-plates-square-tilt-getter-tested-tube-made-in-usa-47","title":"12AT7WA E81CC 6201 NOS Sylvania – 3 Mica Gray Wing Plates Square Getter Tube USA 1947","description":"\u003cp\u003e\u003cstrong\u003e12AT7WA ( E81CC 6201 ) SYLVANIA NOS 3 Mica Gray Wing Plates Square Tilt Getter Tested Tube Made in USA '47\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"\" data-end=\"954\" data-start=\"486\"\u003eThe \u003cstrong data-end=\"518\" data-start=\"489\"\u003e12AT7 WA (E81CC) SYLVANIA\u003c\/strong\u003e , produced in \u003cstrong data-end=\"541\" data-start=\"533\"\u003e1947\u003c\/strong\u003e in the \u003cstrong data-end=\"566\" data-start=\"554\"\u003emilitary\u003c\/strong\u003e version (WA), features a \u003cstrong data-end=\"613\" data-start=\"603\"\u003e3-mica\u003c\/strong\u003e configuration, \u003cstrong data-end=\"643\" data-start=\"615\"\u003egrey wing-type plates\u003c\/strong\u003e and \u003cstrong data-end=\"686\" data-start=\"646\"\u003ea square tilt getter\u003c\/strong\u003e , which testify to its origins among the first series of technical excellence in the post-war period. This valve is a rare example of balance between \u003cstrong data-end=\"852\" data-start=\"826\"\u003estructural robustness\u003c\/strong\u003e and \u003cstrong data-end=\"873\" data-start=\"855\"\u003esonic refinement\u003c\/strong\u003e , with a tonal output that combines precision, transparency and dynamic control.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"1198\" data-start=\"956\"\u003e\u003cstrong data-end=\"965\" data-start=\"956\"\u003eBass\u003c\/strong\u003e : dry, well-defined, and fast. The low register is not pronounced but extremely controlled, ideal for applications requiring \u003cstrong data-end=\"1150\" data-start=\"1104\"\u003eprecise rhythm and the absence of swelling\u003c\/strong\u003e , while maintaining a firm and coherent harmonic foundation.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"1469\" data-start=\"1200\"\u003e\u003cstrong data-end=\"1208\" data-start=\"1200\"\u003eMids\u003c\/strong\u003e : Tidy, transparent, and slightly refined. Vocals are well-centered, with a natural timbre and a discreet yet discernible presence. Acoustic instruments maintain clarity without ever being intrusive. The overall character is sober and balanced.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"1713\" data-start=\"1471\"\u003e\u003cstrong data-end=\"1479\" data-start=\"1471\"\u003eHighs\u003c\/strong\u003e : extended and refined, with an open yet controlled texture. The high range never pushes forward, but accompanies the listening experience with \u003cstrong data-end=\"1639\" data-start=\"1616\"\u003eelegance and coherence\u003c\/strong\u003e , avoiding harshness or fatigue even on high-resolution systems.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"1940\" data-start=\"1715\"\u003e\u003cstrong data-end=\"1727\" data-start=\"1715\"\u003eDynamics\u003c\/strong\u003e : fluid, smooth, and precise. The valve responds immediately but measuredly, without excess, allowing for clear reading of microdetails and a harmonious transition between different sound intensity levels.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"2182\" data-start=\"1942\"\u003e\u003cstrong data-end=\"1956\" data-start=\"1942\"\u003eSoundstage\u003c\/strong\u003e : coherent, stable, and well-focused. The stereo image develops naturally, maintaining good channel separation and credible instrument placement, with a transparent but never cold soundstage.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"2481\" data-start=\"2184\"\u003eThe \u003cstrong data-end=\"2224\" data-start=\"2187\"\u003e12AT7 WA SYLVANIA 3 mica from 1947\u003c\/strong\u003e , in this \u003cstrong data-end=\"2260\" data-start=\"2245\"\u003eNOS version tested\u003c\/strong\u003e , is a valve with a \u003cstrong data-end=\"2325\" data-start=\"2290\"\u003eneutral, polite and professional\u003c\/strong\u003e character, ideal for those seeking \u003cstrong data-end=\"2394\" data-start=\"2348\"\u003ecleanliness, readability and operational stability\u003c\/strong\u003e in the audio field, both in hi-fi systems and in technical and professional equipment.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"2543\" data-start=\"2483\"\u003e🎧 \u003cstrong data-end=\"2543\" data-start=\"2486\"\u003eUse in Headphone Amplifiers and Hi-Fi Driver Stages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"3079\" data-start=\"2545\"\u003eThanks to its \u003cstrong data-end=\"2626\" data-start=\"2561\"\u003etonal transparency and the absence of artificial enhancements\u003c\/strong\u003e , the \u003cstrong data-end=\"2652\" data-start=\"2631\"\u003e12AT7 WA SYLVANIA\u003c\/strong\u003e proves excellent in the best headphone amplifiers and tube preamplifiers. In circuits such as \u003cstrong data-end=\"2776\" data-start=\"2761\"\u003emu-follower\u003c\/strong\u003e , \u003cstrong data-end=\"2786\" data-start=\"2778\"\u003eSRPP\u003c\/strong\u003e , or \u003cstrong data-end=\"2810\" data-start=\"2790\"\u003ecathode follower\u003c\/strong\u003e , it delivers a \u003cstrong data-end=\"2890\" data-start=\"2849\"\u003eclear, detailed and fatigue-free\u003c\/strong\u003e sonic presentation, enhancing reference headphones such as \u003cstrong data-end=\"2952\" data-start=\"2932\"\u003ethe Sennheiser HD650\u003c\/strong\u003e , \u003cstrong data-end=\"2969\" data-start=\"2954\"\u003eFocal Clear\u003c\/strong\u003e , \u003cstrong data-end=\"2989\" data-start=\"2971\"\u003eHifiman Ananda\u003c\/strong\u003e or \u003cstrong data-end=\"3006\" data-start=\"2992\"\u003eZMF Aeolus\u003c\/strong\u003e , in configurations that aim for \u003cstrong data-end=\"3078\" data-start=\"3044\"\u003eneutral and natural reproduction\u003c\/strong\u003e .\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"3129\" data-start=\"3081\"\u003e🎸 \u003cstrong data-end=\"3129\" data-start=\"3084\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"3701\" data-start=\"3131\"\u003eThe \u003cstrong data-end=\"3155\" data-start=\"3134\"\u003e12AT7 WA SYLVANIA\u003c\/strong\u003e also finds its place as \u003cstrong data-end=\"3201\" data-start=\"3180\"\u003ea driver or inverter\u003c\/strong\u003e in \u003cstrong data-end=\"3245\" data-start=\"3205\"\u003etube guitar amplifiers\u003c\/strong\u003e , especially in \u003cstrong data-end=\"3292\" data-start=\"3272\"\u003eblackface\u003c\/strong\u003e or \u003cstrong data-end=\"3324\" data-start=\"3295\"\u003evintage-inspired boutique\u003c\/strong\u003e Fender models that use this type of tube to \u003cstrong data-end=\"3404\" data-start=\"3366\"\u003eoptimize headroom and definition\u003c\/strong\u003e . It offers a \u003cstrong data-end=\"3464\" data-start=\"3421\"\u003eclean, controlled sound with a ready attack\u003c\/strong\u003e and \u003cstrong data-end=\"3494\" data-start=\"3467\"\u003eprogressive saturation\u003c\/strong\u003e , ideal for musicians who want \u003cstrong data-end=\"3561\" data-start=\"3532\"\u003elinear dynamic response\u003c\/strong\u003e and \u003cstrong data-end=\"3584\" data-start=\"3564\"\u003etonal fidelity\u003c\/strong\u003e . On bass amps or rack preamps, it allows for a tight and articulate output, with excellent detail in complex passages.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"4053\" data-start=\"3703\"\u003e🎯 \u003cstrong data-end=\"3732\" data-start=\"3706\"\u003eNote for audiophiles\u003c\/strong\u003e :\u003cbr data-end=\"3736\" data-start=\"3733\"\u003eA \u003cstrong data-end=\"3777\" data-start=\"3748\"\u003esober, solid and coherent\u003c\/strong\u003e tube, perfect for those seeking \u003cstrong data-end=\"3848\" data-start=\"3802\"\u003etechnical rigor and controlled musical performance\u003c\/strong\u003e , without timbral imbalances or artificial euphony. A \u003cstrong data-end=\"3926\" data-start=\"3907\"\u003ereliable foundation\u003c\/strong\u003e for neutral listening systems or for professional applications where transparency in the gain section is essential.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eValve tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -2V\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Gm = 5.5 ; Ia = 10.0 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 Gm = 4.1 ; Ia = 9.6 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 5.9 ; Ia = 12.8 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low Noise \u0026amp; Microphonics – Tested and compliant for use in hi-fi systems and guitar amplifiers.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – Very strong and stable output, no fluctuations.\u003cbr\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\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and in perfect working order. Comes in our custom box for optimal protection.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 706 - produced 6th week of 1947\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":"SYLVANIA","offers":[{"title":"Default Title","offer_id":54520618877276,"sku":"02917","price":59.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_f4819bae-f095-4146-a2ac-ed9a66c36a2a.jpg?v=1747233972","url":"https:\/\/vacuumtubestreasures.com\/en\/products\/12at7-wa-e81cc-sylvania-nos-3-mica-gray-wing-plates-square-tilt-getter-tested-tube-made-in-usa-47","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}