{"product_id":"12bh7-rca-nos-nib-black-plates-horse-shoe-getter-usa-1960s-amplitrex-tested","title":"12BH7 RCA NOS NIB Black Plates Horse Shoe Getter USA 1960s AMPLITREX Tested","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12BH7 RCA NOS NIB 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 – VERY STRONG – Low Noise \u0026amp; Microphonics – Vintage American RCA 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 class=\"s1\"\u003e\u003cb\u003e AMPLITREX 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 = 3.10 ; Ia = 10.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 3.10 ; Ia = \u003cmeta charset=\"utf-8\"\u003e10.8 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-aligned, 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 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\u003e \u003cspan\u003ePrecious \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12BH7 RCA NOS NIB\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, one of the most interesting configurations of RCA's American production of the period.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12BH7\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a double triode particularly 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 of this RCA specimen further increases its interest for fans of vintage American tubes and for quality hi-fi and instrumental equipment.\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 accurately 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, obtaining a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVERY STRONG\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e classification. Both sections reach \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 3100\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, corresponding to the 100% reference value, with very similar anodic currents and a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003every good balance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The tube also resulted in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with very strong and stable emission and no anomalies detected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe excellent uniformity of the sections and the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e selection make it 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 equipment and instrument 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\u003eFrom a sonic point of view, American RCA Black Plates are appreciated for a full-bodied, dynamic and natural reproduction, with solid and well-controlled bass, a rich and musical midrange and clean and well-defined high frequencies. The overall character retains the typical musicality of vintage RCA production, combining it with the driving capability and authority typical of the 12BH7 family.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOS NIB – New Old Stock, New In Box\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, accurately tested and perfectly functional, supplied in its \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eoriginal RCA box\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The aesthetic conditions are good, with partially eroded but still legible screen printing and a well-preserved tube body.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn excellent \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRCA 12BH7 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 looking for an authentic NOS American 12BH7, very strong, well-balanced and quiet.\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 NOS - NIB - New Old Stock, New In Box - Tested and functional - 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 Good – Partially eroded but still legible markings. 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 Indecipherable code. Production approximately 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=\"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":"RCA","offers":[{"title":"Default Title","offer_id":58857394602332,"sku":"03764N","price":131000.0,"currency_code":"KRW","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/11_653c8e11-b682-4b54-9f5a-c4a0ecf6afc0.jpg?v=1787934992","url":"https:\/\/vacuumtubestreasures.com\/en-kr\/products\/12bh7-rca-nos-nib-black-plates-horse-shoe-getter-usa-1960s-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}