{"product_id":"12ax7-ecc83-hammond-by-rca-matched-pair-long-gray-plates-square-tilt-getter-made-in-usa-50s","title":"12AX7 \/ ECC83 HAMMOND by RCA Long Gray Plates Square Tilt Getter Made in USA '50s","description":"\u003cp class=\"p1\"\u003e \u003cb\u003e12AX7 \/ ECC83 HAMMOND by RCA – Long Gray Plates – Square Tilt Getter – Made in USA '50s\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e \u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e This 12AX7 \/ ECC83 branded Hammond and produced by RCA in the United States in the 50s represents one of the most authentic expressions of the American school of the time, characterized by robust construction, high quality materials and great reliability over time.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e Hammond production by RCA is particularly appreciated because it was intended for high-end electromechanical organs, where stability and durability were essential. This translates today into selected tubes, often superior to the average of standard production.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e The internal structure highlights distinctive elements of great value:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e \u003cb\u003eLong Gray Plates\u003c\/b\u003e\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \u003cb\u003eSquare Tilt Getter\u003c\/b\u003e\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e solid and precise mechanical construction typical of RCA from the 50s\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp class=\"p1\"\u003eThe \u003cspan class=\"s2\"\u003e\u003cb\u003esquare tilt getter\u003c\/b\u003e\u003c\/span\u003e is a less common configuration, typical of older production runs, associated with excellent vacuum quality and operational longevity.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e The valve has been tested in our laboratory with \u003cspan class=\"s2\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e , with a \u003cspan class=\"s2\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e result, and verified by \u003cspan class=\"s2\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e , proving to be perfectly suitable even for sensitive applications.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e The aesthetic conditions are \u003cspan class=\"s2\"\u003e\u003cb\u003econsistent with the age\u003c\/b\u003e\u003c\/span\u003e , as visible in the photographs: partially present silkscreens and signs of aging, without compromising performance in any way.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e This RCA 50's configuration offers a typically \u003cspan class=\"s1\"\u003e\u003cb\u003ewarm, full and three-dimensional\u003c\/b\u003e\u003c\/span\u003e sound, with an extremely natural musical presentation.\u003c\/p\u003e\n\n \u003cp class=\"p3\"\u003e\u003cb\u003eBass:\u003c\/b\u003e Deep and rounded, with excellent structure and body. Never intrusive, but always well controlled.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eMids:\u003c\/b\u003e The real strength: rich, textured, and incredibly expressive. Vocals are present, credible, and nuanced.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eHighs:\u003c\/b\u003e Sweet and refined, never aggressive. Excellent extension with a velvety performance typical of the best vintage RCA productions.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eDynamics:\u003c\/b\u003e Fluid and natural, with a musical response that prioritizes coherence and musicality over artificial impact.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eSoundstage:\u003c\/b\u003e Wide and well-layered, with excellent instrument separation and realistic depth.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎧\u003c\/span\u003e Use in Hi-Fi Amplifiers\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Ideal for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e tube preamplifiers\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e vintage and modern integrated amplifiers\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e phono stages (due to low noise)\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e quality buffer and line stage\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp class=\"p1\"\u003ePerfect for systems requiring \u003cspan class=\"s2\"\u003e\u003cb\u003emusicality, naturalness and realistic harmonic reconstruction\u003c\/b\u003e\u003c\/span\u003e , with a typically “American” sound signature.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎸\u003c\/span\u003e Use in Music Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Also highly appreciated in the instrumental field for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e guitar amplifiers\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e vintage organs and instruments\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e It offers a \u003cspan class=\"s2\"\u003e\u003cb\u003ewarm, progressive and musical\u003c\/b\u003e\u003c\/span\u003e response, with a soft and controlled saturation, ideal for those looking for character without harshness.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎯\u003c\/span\u003e Note for audiophiles\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e This Hammond by RCA from the 1950s represents a very interesting choice for those who want a \u003cspan class=\"s1\"\u003e\u003cb\u003e12AX7 with authentic vintage character\u003c\/b\u003e\u003c\/span\u003e , solid construction and high performance.\u003c\/p\u003e\n\n \u003cp class=\"p1\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e test on Amplitrex and the \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e verification ensure stable and reliable operation, making it suitable even for critical positions in the circuit.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e A valve that combines \u003cspan class=\"s1\"\u003e\u003cb\u003ehistory, construction and musicality\u003c\/b\u003e\u003c\/span\u003e , designed for those seeking not only performance, but a true listening experience.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eTested on AMPLITREX AT-1000 Tube Tester\u003c\/strong\u003e\u003c\/p\u003e\n\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 VERY STRONG\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1\u003c\/strong\u003e : Gm = 1500; Ia = 0.9 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2\u003c\/strong\u003e : Gm =\u003cmeta charset=\"utf-8\"\u003e 1700 ; Ia = 1.0 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdiv\u003e\n\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cul\u003e\n\n \u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low Noise \u0026amp; Microphonics – Tested and compliant for use in hi-fi systems and guitar amplifiers.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage tubes - Tested and in perfect working order. Shipped 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\u003eBalance:\u003c\/strong\u003e The sections present a coherent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between the sections is not required.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e \u003cspan\u003eFair – Writing almost completely faded. 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\n \u003cp\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e Unreadable, identifiable by construction features. 1950s\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca rel=\"noopener\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":57028414636380,"sku":"03472","price":721.0,"currency_code":"NOK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_70b4ffdf-e5fb-41cc-909a-113fc350a427.jpg?v=1773738748","url":"https:\/\/vacuumtubestreasures.com\/en-no\/products\/12ax7-ecc83-hammond-by-rca-matched-pair-long-gray-plates-square-tilt-getter-made-in-usa-50s","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}