{"product_id":"12bh7a-westinghouse-black-plates-horse-shoe-getter-usa-1960s-amplitrex-tested","title":"12BH7A WESTINGHOUSE Black Plates Horse Shoe Getter USA 1960s AMPLITREX Tested","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12BH7A WESTINGHOUSE Black Plates Horse Shoe Getter – Made in USA – 1960s\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 = 2.4 ; Ia = 7.8 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 2.6 ; Ia = \u003cmeta charset=\"utf-8\"\u003e9.9 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 The sections are not perfectly aligned. The tube is suitable for use in hi-fi in non-critical stages (input or driver) and in guitar amplifiers. Not suitable as a phase inverter or in applications requiring rigorous balance between sections.\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, vintage American production attributable to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1960s\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, 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, a configuration representative of the robust American productions of the era.\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 dual triode particularly appreciated in driver and line stages for its good driving capability, robustness, and operational stability. This \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWESTINGHOUSE Made in USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e example, with its characteristic Black Plates, represents an interesting choice for vintage hi-fi equipment and instrument amplifiers that use this type of tube.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube underwent a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e48-hour burn-in \/ stability test\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and was then thoroughly 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 classification. It was also selected for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with strong and regular emission, stable behavior, and absence of shorts or gas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe two sections do not show a balance rigorous enough for applications requiring perfect symmetry. The tube is therefore particularly suitable for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edriver stages, line stages, and other non-critical positions\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as well as in guitar amplifiers, but it is not the ideal choice as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ephase inverter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e when a strict balance between sections is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFrom a sonic perspective, vintage American 12BH7As are appreciated for a solid, dynamic, and natural presentation, with well-present and controlled bass, full-bodied and defined mids, and a clean and well-articulated high range. The typical driving capability of the 12BH7A contributes to an 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, thoroughly tested and perfectly functional. The aesthetic condition is appropriate for its age and previous use, with partly faded or barely legible silk-screening and clear signs of time.\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\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, truly 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, quiet, and reliable vintage American 12BH7A.\u003c\/span\u003e\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 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 Adequate – Partly faded or barely legible markings, general aesthetic with clear signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code:\u003c\/b\u003e Code not decipherable. Production roughly attributable to the 1960s based on construction characteristics.\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":58856599322972,"sku":"03762N","price":44.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_85e3f6a6-a9a6-41ac-b8e6-f87b22316acb.jpg?v=1787932784","url":"https:\/\/vacuumtubestreasures.com\/en-de\/products\/12bh7a-westinghouse-black-plates-horse-shoe-getter-usa-1960s-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}