{"product_id":"12bh7a-westinghouse-black-plates-horse-shoe-getter-usa-1963-amplitrex-tested","title":"12BH7A WESTINGHOUSE Black Plates Horse Shoe Getter USA 1963 AMPLITREX Tested","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12BH7A WESTINGHOUSE Black 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 – 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 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 = 2.6 ; Ia = 8.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 2.5 ; Ia = \u003cmeta charset=\"utf-8\"\u003e7.8 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-matched, making the tube 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 Strong – Strong and regular emission, suitable for any application.\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\u003e\u003cspan\u003eInteresting \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12BH7A WESTINGHOUSE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, produced in the United States in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1963\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and characterized by the sought-after \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Plates with Horse Shoe Getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e construction, typical of robust American productions of the era.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe EIA code \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e337\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e identifies \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWestinghouse Electric Corporation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, while the date code \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e63-09\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e places production in the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e9th week of 1963\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making this specimen particularly interesting for vintage restorations and equipment seeking an original American 12BH7A from the period.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12BH7A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a double triode appreciated in driver and line stages for its good driving capability, robustness, and operational stability. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Plates\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e construction adds further appeal to this Westinghouse Made in USA specimen, intended for those seeking authentic vintage American production.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube has undergone \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e48 hours of burn-in \/ stability test\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and subsequently carefully tested in our laboratory using the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000 Tube Tester\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, achieving a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSTRONG\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e rating. The two sections show \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003every good balance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with particularly consistent transconductance, and the tube also proved to be \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with strong and regular emission and no anomalies detected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThanks to the good balance between sections and the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e selection, it is particularly interesting for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edriver stages, line stages, and phase inverters\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as well as for hi-fi and instrumental amplifiers compatible with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12BH7 \/ 12BH7A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, even in the most sensitive audio positions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSonically, vintage American 12BH7A tubes are appreciated for a solid, dynamic, and natural presentation, with well-present and controlled bass, full and defined mids, and a clean and well-articulated high range. The typical driving capability of the 12BH7A contributes to energetic and authoritative reproduction in equipment designed for this tube.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVintage Used\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, carefully tested and fully functional. The aesthetic conditions are \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003egood\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with partially eroded but still legible markings and the tube body in good overall condition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn authentic \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWESTINGHOUSE 12BH7A Black Plates Horse Shoe Getter Made in USA from 1963\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, genuinely tested and selected by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVacuum Tubes Treasures\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, ideal for those seeking a strong, well-balanced, and quiet vintage American 12BH7A.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCondition\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 Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eFunctionality:\u003c\/b\u003e Fully operational.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eCosmetic Condition:\u003c\/b\u003e Good – Markings partially eroded, but still legible. Tube body in good condition. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code:\u003c\/b\u003e 63-09 337 → 337 → Westinghouse Electric Corporation, Baltimore 3, Md. - 63-09 → RMA\/EIA Open Date Code → manufactured in the 9th 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=\"Why our tubes are different – the VTT protocol that improves sound, reliability and durability\" 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":58856856879452,"sku":"03763N","price":44.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_cf007ddb-2100-4ce5-a658-0361d9f1aae7.jpg?v=1787933632","url":"https:\/\/vacuumtubestreasures.com\/en-lv\/products\/12bh7a-westinghouse-black-plates-horse-shoe-getter-usa-1963-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}