{"product_id":"12ax7-ecc83-westinghouse-short-gray-plates-square-getter-tube-made-in-usa-50s","title":"12AX7 \/ ECC83 Knight by Westinghouse Short Gray Plates Square Getter Tube Made in USA '50s","description":"\u003cp class=\"p1\"\u003e\u003cstrong\u003e12AX7 \/ ECC83 Knight by Westinghouse Short Gray Plates Square Getter Tube Made in USA '50s\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested – STRONG – Low Noise \u0026amp; Microphonics \u003cmeta charset=\"utf-8\"\u003e– \u003c\/b\u003e\u003cstrong\u003eVintage American \u003cmeta charset=\"utf-8\"\u003eWestinghouse Production\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis \u003cspan class=\"s1\"\u003e\u003cb\u003e12AX7 \/ ECC83 branded Knight\u003c\/b\u003e\u003c\/span\u003e, produced by \u003cspan class=\"s1\"\u003e\u003cb\u003eWestinghouse in the USA in the 1950s\u003c\/b\u003e\u003c\/span\u003e, is a valuable testament to the best American production of the era, when numerous commercial brands relied on major US manufacturers for professional-quality tubes.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe construction with \u003cspan class=\"s1\"\u003e\u003cb\u003eShort Gray Plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003eSquare Getter\u003c\/b\u003e\u003c\/span\u003e identifies a typical configuration of Westinghouse productions from the late 1950s, appreciated for its reliability, robust construction, and balanced musicality.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis tube has been carefully checked using an \u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e, resulting in \u003cspan class=\"s1\"\u003e\u003cb\u003eSTRONG\u003c\/b\u003e\u003c\/span\u003e emission, with stable output and regular electrical behavior.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection makes it particularly interesting for audio applications where quietness and operational reliability are important.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003eSonic Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eWestinghouse ECC83s from this period are generally appreciated for their balanced and musical character, with a natural and uncolored presentation.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe bass range is well-controlled and accurately articulated, with good presence and always an orderly response.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe mids are natural and well-focused, with good vocal intelligibility and a balanced harmonic rendering of acoustic instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe high range is clean and pleasantly extended, with good detail and absence of harshness.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe dynamic response is fluid and coherent, capable of effectively following musical variations without sounding compressed.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe soundstage appears well-organized, with correct instrument separation and a credible presentation of the acoustic space.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎧 \u003c\/span\u003eUse in Hi-Fi Amplifiers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis 12AX7 \/ ECC83 is particularly suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003etube preamplifiers\u003c\/li\u003e\n\n\u003cli\u003eline stages\u003c\/li\u003e\n\n\u003cli\u003ecompatible phono stages\u003c\/li\u003e\n\n\u003cli\u003eintegrated amplifiers\u003c\/li\u003e\n\n\u003cli\u003edriver stages\u003c\/li\u003e\n\n\u003cli\u003erestorations of vintage American electronics\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection also makes it suitable for sensitive circuit positions.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎸 \u003c\/span\u003eUse in Musical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIn guitar amplifiers and other compatible musical applications, this Westinghouse offers:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003egood note definition\u003c\/li\u003e\n\n\u003cli\u003enatural and present mids\u003c\/li\u003e\n\n\u003cli\u003ebalanced dynamic response\u003c\/li\u003e\n\n\u003cli\u003elow noise\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThese characteristics make it interesting for both vintage amplifiers and boutique projects inspired by classic American sounds.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎯 \u003c\/span\u003eNote for Audiophiles\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eWestinghouse Made in USA productions of the 1950s\u003c\/b\u003e\u003c\/span\u003e represent an important part of American tube history.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe combination of:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eoriginal USA Westinghouse production\u003c\/li\u003e\n\n\u003cli\u003eKnight branding\u003c\/li\u003e\n\n\u003cli\u003eShort Gray Plates\u003c\/li\u003e\n\n\u003cli\u003eSquare Getter\u003c\/li\u003e\n\n\u003cli\u003eLow Noise \u0026amp; Microphonics\u003c\/li\u003e\n\n\u003cli\u003eSTRONG emission\u003c\/li\u003e\n\n\u003cli\u003ewell-balanced sections\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003emakes this tube an interesting choice for those who desire an authentic, reliable, and musically balanced American ECC83.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003eA selected vintage example that preserves the charm and solidity of American electronic tradition from the golden age.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTested on AMPLITREX AT-1000 Tube Tester\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Test:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eVa = 250V, Vg = -2V\u003cstrong\u003e\u003cbr\u003eAverage 100%:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eGm = 1600 ; Ia = 1.2 mA\u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003c\/strong\u003e STRONG\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1\u003c\/strong\u003e: Gm = 1300 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2\u003c\/strong\u003e: Gm = \u003cmeta charset=\"utf-8\"\u003e1400 ; Ia = 0.9 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and suitable for use in hi-fi, even in phono stages and guitar amplifiers. Also suitable for V1.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBalance:\u003c\/strong\u003e Good. The sections show consistent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Strong – Strong and regular emission, suitable for any application.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage Tubes - Tested and fully functional. 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\u003ePerfectly operational.\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\u003e Good – Markings partially eroded, but still legible. Tube body in good condition. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e337 304 → RMA\/EIA Open Date Code → manufactured the 04th week of 1953 - 337 → Westinghouse Electric Corporation, Baltimore 3, Md.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"WESTINGHOUSE","offers":[{"title":"Default Title","offer_id":57826095628636,"sku":"03642","price":294.0,"currency_code":"RON","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_dc6b4a34-5056-486d-aae0-39e35f882cc5.jpg?v=1780925330","url":"https:\/\/vacuumtubestreasures.com\/en-ro\/products\/12ax7-ecc83-westinghouse-short-gray-plates-square-getter-tube-made-in-usa-50s","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}