{"product_id":"12ax7-ecc83-nos-raytheon-long-black-plates-tested-tube-made-in-usa-61","title":"12AX7 \/ ECC83 NOS RAYTHEON Long Black Plates Tested Tube - Balanced - Made in USA '61","description":"\u003cp\u003e\u003cstrong\u003e12AX7 \/ ECC83 NOS RAYTHEON Long Black Plates Halo Getter Tested Tube Made in USA '61\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics \u003cmeta charset=\"utf-8\"\u003e– Balanced\u003cspan\u003e \u003c\/span\u003e–\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eVintage American\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003eRAYTHEON\u003c\/span\u003e Production\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis \u003cspan class=\"s1\"\u003e\u003cb\u003e12AX7 \/ ECC83 Raytheon NOS\u003c\/b\u003e\u003c\/span\u003e, produced in the United States in \u003cspan class=\"s1\"\u003e\u003cb\u003e1961\u003c\/b\u003e\u003c\/span\u003e, represents one of the most appreciated American productions from the golden age of signal tubes.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe construction with \u003cspan class=\"s1\"\u003e\u003cb\u003eLong Black Plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/span\u003e identifies a classic Raytheon configuration from the early 1960s, highly sought after by enthusiasts for its build quality, reliability, and distinctive sonic character.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eRaytheon was one of the most important companies in American electronics history, and its ECC83 long black plates are still considered among the most interesting vintage USA productions for quality audio applications.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis specimen has been carefully verified using an \u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e, resulting \u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e, with electrical performance very close to the nominal reference values and excellent balance between sections.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection makes it particularly suitable for sensitive circuit positions, including input stages, phono stages, and V1.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSonic Characteristics\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eRaytheon Long Black Plates are appreciated for a rich, fluid, and musical sonic presentation, with a typically American personality characterized by body, naturalness, and excellent intelligibility.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe bass range is full and well-structured, with good presence and a pleasant sense of solidity that supports the reproduction without weighing it down.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe mids represent one of the strengths of this production. Vocals are textured, credible, and engaging, while acoustic instruments and harmonics maintain a rich and natural texture.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe highs are open, refined, and well integrated into the musical message. Detail is present without being aggressive or artificial.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eDynamic response is fluid and well-controlled, with excellent ability to follow variations in intensity and musical nuances.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe soundstage appears wide and stable, with good instrument focus and an orderly presentation of the acoustic space.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eThis Raytheon ECC83 is particularly suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003etube preamplifiers\u003c\/li\u003e\n\n\u003cli\u003eline stages\u003c\/li\u003e\n\n\u003cli\u003ephono stages\u003c\/li\u003e\n\n\u003cli\u003eintegrated amplifiers\u003c\/li\u003e\n\n\u003cli\u003ecompatible driver stages\u003c\/li\u003e\n\n\u003cli\u003erestoration of vintage American hi-fi electronics\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection makes it particularly interesting even in the most sensitive positions of the circuit.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎸 Use in Musical Applications\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eIn the musical instrument amplifier sector, Raytheon Long Black Plates are appreciated for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003enatural harmonic response\u003c\/li\u003e\n\n\u003cli\u003erich and well-present mids\u003c\/li\u003e\n\n\u003cli\u003egood dynamics\u003c\/li\u003e\n\n\u003cli\u003econtained noise\u003c\/li\u003e\n\n\u003cli\u003ebalanced musicality\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eCharacteristics that make them interesting for both vintage amplifiers and modern boutique designs.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎯 Note for audiophiles and technicians\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eAuthentic \u003cspan class=\"s1\"\u003e\u003cb\u003eRaytheon Long Black Plates Made in USA\u003c\/b\u003e\u003c\/span\u003e represent one of the most fascinating productions of the American ECC83 tradition.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe combination of:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eoriginal USA Raytheon production\u003c\/li\u003e\n\n\u003cli\u003e1961 year\u003c\/li\u003e\n\n\u003cli\u003eLong Black Plates\u003c\/li\u003e\n\n\u003cli\u003eHalo Getter\u003c\/li\u003e\n\n\u003cli\u003eLow Noise \u0026amp; Microphonics\u003c\/li\u003e\n\n\u003cli\u003eperfectly balanced sections\u003c\/li\u003e\n\n\u003cli\u003eVERY STRONG performance\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p2\"\u003emakes this specimen particularly interesting for those looking for a quality vintage American ECC83, capable of combining reliability, musicality, and historical charm.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003eA selected tube that expresses the authentic character of the best Raytheon production of the early 60s, in true Vacuum Tubes Treasures style.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTested on AMPLITREX AT-1000 Tube Tester\u003c\/strong\u003e\u003c\/p\u003e\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:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eVERY STRONG\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube \u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1\u003c\/strong\u003e: Gm = 1600 ; Ia = 1.1 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2\u003c\/strong\u003e: Gm = 1600 ; Ia = 1.1 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\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\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShort Circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and working - Supplied 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\u003eFunctionality: \u003c\/strong\u003ePerfectly operational.\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\u003e Very Good – Legible lettering with slight signs of age, no obvious defects. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 280 61-21 → 280 → Raytheon Manufacturing Company, Waltham 54, Mass. ; 61-21 → RMA\/EIA Open Date Code → manufactured in the 21st week of 1961\u003cmeta charset=\"utf-8\"\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\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\/p\u003e","brand":"RAYTHEON","offers":[{"title":"Default Title","offer_id":57827456090460,"sku":"03643","price":7800.0,"currency_code":"ALL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_1221e00c-8c40-449a-986e-9be17f3eb65a.jpg?v=1780927901","url":"https:\/\/vacuumtubestreasures.com\/en-al\/products\/12ax7-ecc83-nos-raytheon-long-black-plates-tested-tube-made-in-usa-61","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}