{"product_id":"12bh7a-westinghouse-gray-plates-horse-shoe-getter-usa-1963-amplitrex-tested","title":"12BH7A WESTINGHOUSE NOS NIB Gray Plates Horse Shoe Getter USA 1963 AMPLITREX Tested","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12BH7A WESTINGHOUSE NOS NIB Gray Plates Horse Shoe Getter – Made in USA – 1963\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics – Vintage American WESTINGHOUSE Production\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Results\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eTubes tested on\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTest Conditions:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -10.5V\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAverage 100%:\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eGm = 3.10 ; Ia = 11.5 mA\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Result:\u003c\/b\u003e\u003c\/span\u003e VERY STRONG\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eTube:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 1:\u003c\/strong\u003e Gm = 2.80 ; Ia = 10.0 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 2.90 ; Ia = \u003cmeta charset=\"utf-8\"\u003e11.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAdditional Tests Performed\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eBurn-in \/ Stability Test:\u003c\/strong\u003e 48h – OK\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eMicrophonics:\u003c\/b\u003e Low. Tested and suitable for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eBalance:\u003c\/b\u003e Very good. The sections are consistent and well-aligned, making the tube also suitable for use as a phase inverter in hi-fi and instrumental applications.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eEmission Quality:\u003c\/b\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eShorts and GAS:\u003c\/b\u003e\u003cspan class=\"s2\"\u003e Absent.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 class=\"p2\"\u003e\u003cb\u003eDescription:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eValuable \u003cstrong\u003e12BH7A WESTINGHOUSE NOS NIB\u003c\/strong\u003e, produced in the United States in \u003cstrong\u003e1963\u003c\/strong\u003e and characterized by the classic \u003cstrong\u003eGray Plates with Horse Shoe Getter\u003c\/strong\u003e construction, an expression of high-quality American tube production from the early 1960s.\u003c\/p\u003e\n\u003cp\u003eThe EIA code \u003cstrong\u003e337\u003c\/strong\u003e identifies \u003cstrong\u003eWestinghouse Electric Corporation\u003c\/strong\u003e, while the date code \u003cstrong\u003e63-52\u003c\/strong\u003e places production in the \u003cstrong\u003e52nd week of 1963\u003c\/strong\u003e. A particularly interesting specimen also for collectors and enthusiasts of vintage American components, preserved in authentic \u003cstrong\u003eNOS NIB – New Old Stock, New In Box\u003c\/strong\u003e conditions with original box.\u003c\/p\u003e\n\u003cp\u003eThe tube underwent \u003cstrong\u003e48 hours of burn-in \/ stability testing\u003c\/strong\u003e and was then carefully tested in our laboratory using an \u003cstrong\u003eAmplitrex AT-1000 Tube Tester\u003c\/strong\u003e, achieving a \u003cstrong\u003eVERY STRONG\u003c\/strong\u003e classification. The emission is strong and stable, and the two sections show \u003cstrong\u003every good balance\u003c\/strong\u003e. The tube also proved to be \u003cstrong\u003eLow Noise \u0026amp; Microphonics\u003c\/strong\u003e, a particularly interesting quality in the most demanding audio applications.\u003c\/p\u003e\n\u003cp\u003eSonically, American 12BH7A tubes from this period are appreciated for their authoritative and dynamic reproduction, with solid and controlled bass, a natural and well-present midrange, and clean and defined high frequencies. The good driving capability typical of the 12BH7A contributes to an energetic, stable, and well-articulated presentation in equipment designed for this tube.\u003c\/p\u003e\n\u003cp\u003eIdeal for \u003cstrong\u003edriver stages, line stages, phase inverters\u003c\/strong\u003e, preamplifiers, and hi-fi amplifiers, as well as instrumental applications compatible with \u003cstrong\u003e12BH7 \/ 12BH7A\u003c\/strong\u003e. Thanks to the \u003cstrong\u003every good balance of the sections\u003c\/strong\u003e and the \u003cstrong\u003eLow Noise \u0026amp; Microphonics\u003c\/strong\u003e selection, this specimen is particularly suitable for positions where stability, quietness, and uniform operation are of greater importance.\u003c\/p\u003e\n\u003cp\u003eThe tube is \u003cstrong\u003eNOS NIB – New Old Stock, New In Box\u003c\/strong\u003e, carefully tested, and fully functional. The aesthetic condition is \u003cstrong\u003every good\u003c\/strong\u003e, with legible silk-screen printing and only minor signs of age, and it comes in its \u003cstrong\u003eoriginal Westinghouse box\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAn excellent \u003cstrong\u003eWESTINGHOUSE 12BH7A Gray Plates Horse Shoe Getter Made in USA from 1963\u003c\/strong\u003e, genuinely tested and selected by \u003cstrong\u003eVacuum Tubes Treasures\u003c\/strong\u003e, ideal for those seeking an authentic American NOS 12BH7A, strong, well-balanced, and quiet.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eConditions\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eCondition:\u003c\/b\u003e NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eFunctionality:\u003c\/b\u003e Perfectly operational.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eAesthetic Condition:\u003c\/b\u003e Very Good – Clearly legible markings with slight signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code: \u003c\/b\u003e337 → Westinghouse Electric Corporation, Baltimore 3, Md. - 63-52  → RMA\/EIA Open Date Code → manufactured the 52nd week of 1963\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"s2\"\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\/span\u003e\u003c\/p\u003e","brand":"WESTINGHOUSE","offers":[{"title":"Default Title","offer_id":58856080867676,"sku":"03761N","price":49.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_4ee616bc-d242-4173-bcef-02f477e264f4.jpg?v=1787928965","url":"https:\/\/vacuumtubestreasures.com\/en-be\/products\/12bh7a-westinghouse-gray-plates-horse-shoe-getter-usa-1963-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}