{"product_id":"12ax7-ecc83-rca-short-gray-plates-halo-getter-matched-pair-tubes-made-in-usa-60s","title":"12AX7 \/ ECC83 RCA Short Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s","description":"\u003cp\u003e\u003cstrong\u003e12AX7 \/ ECC83 RCA Short Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAMPLITREX Tested - Low Noise \u0026amp; Microphonics - Vintage American RCA 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\u003ematched pair of 12AX7 \/ ECC83 RCA\u003c\/b\u003e\u003c\/span\u003e tubes, produced in the USA in the 1960s, represents one of the most balanced and versatile interpretations of the famous American ECC83.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe construction with \u003cspan class=\"s1\"\u003e\u003cb\u003eShort Gray Plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/span\u003e identifies RCA production at the company's full industrial maturity, characterized by reliability, operational stability, and excellent constructive consistency.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eRCA short gray plates have been appreciated for decades for their natural musical character, their ability to adapt to numerous applications, and a balanced sound presentation that makes them particularly interesting in both hi-fi and musical contexts.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis pair has been carefully selected and verified using \u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000\u003c\/b\u003e\u003c\/span\u003e, showing \u003cspan class=\"s1\"\u003e\u003cb\u003eSTRONG\u003c\/b\u003e\u003c\/span\u003e performance on both tubes and overall consistent performance for use as a \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection also ensures contained noise and stable behavior even in the most sensitive circuit positions.\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=\"p1\"\u003eThe 1960s RCA Short Gray Plates are known for a balanced, pleasant, and versatile musical reproduction.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe bass range is well-controlled and correctly articulated, with good presence and an always natural response.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe mids are open and credible, with a pleasant rendering of voices and acoustic instruments. The character remains musical and well-balanced.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe highs are clean and well-extended, with a good ability to reproduce detail without being aggressive or fatiguing.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe dynamic response is prompt and natural, with a good ability to follow variations in the musical program while maintaining balance and consistency.\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 is ordered and stable, with correct instrument separation and a pleasant sense of openness.\u003c\/p\u003e\n\u003ch3 data-end=\"1886\" data-start=\"1565\"\u003e🎧 \u003cstrong data-end=\"1605\" data-start=\"1568\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis matched pair is particularly suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eTube preamplifiers\u003c\/li\u003e\n\n\u003cli\u003eIntegrated hi-fi amplifiers\u003c\/li\u003e\n\n\u003cli\u003eLine stages\u003c\/li\u003e\n\n\u003cli\u003ePhono stages\u003c\/li\u003e\n\n\u003cli\u003eDriver stages\u003c\/li\u003e\n\n\u003cli\u003eRestorations of vintage American 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 also makes it suitable for the most sensitive circuit positions.\u003c\/p\u003e\n\u003ch3 data-end=\"2221\" data-start=\"1888\"\u003e🎸 \u003cstrong data-end=\"1924\" data-start=\"1891\"\u003eUse in Musical Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThe RCA ECC83s from the 1960s are also highly appreciated in musical contexts due to their versatility and musicality.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThey can offer:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eGood harmonic response\u003c\/li\u003e\n\n\u003cli\u003eNatural and well-defined mids\u003c\/li\u003e\n\n\u003cli\u003eContained noise\u003c\/li\u003e\n\n\u003cli\u003eBalanced dynamic response\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p4\"\u003eCharacteristics that make them interesting for both vintage amplifiers and modern boutique designs.\u003c\/p\u003e\n\u003ch3 data-end=\"2709\" data-start=\"2223\"\u003e🎯 \u003cstrong data-end=\"2264\" data-start=\"2226\"\u003eNote for Audiophiles and Technicians\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eAuthentic \u003cspan class=\"s1\"\u003e\u003cb\u003eRCA Made in USA\u003c\/b\u003e\u003c\/span\u003e tubes are always a popular choice among enthusiasts of American tubes.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe combination of:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eOriginal RCA USA production\u003c\/li\u003e\n\n\u003cli\u003eShort Gray Plates\u003c\/li\u003e\n\n\u003cli\u003eHalo Getter\u003c\/li\u003e\n\n\u003cli\u003eMatched Pair\u003c\/li\u003e\n\n\u003cli\u003eLow Noise \u0026amp; Microphonics\u003c\/li\u003e\n\n\u003cli\u003eSTRONG performance\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003emakes this pair a very interesting solution for those who want a balanced, musical, and reliable American ECC83.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003eA selected pair that retains all the charm of RCA's 1960s tradition, offered according to Vacuum Tubes Treasures quality standards.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTube tested on \u003cstrong\u003eAMPLITREX AT-1000 \u003c\/strong\u003eTube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e Va = 250V ; Vg = -2V\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = \u003cmeta charset=\"utf-8\"\u003e1400 ; Ia = 1.1 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.7 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = \u003cmeta charset=\"utf-8\"\u003e1400 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\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 use in hi-fi and guitar amplifiers, including in V1.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e Good. The sections exhibit consistent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Good Emission – Good and regular emission, suitable for any application.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShorts 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\u003eConditions:\u003c\/strong\u003e Vintage Tubes - Tested and fully functional. 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 Adequate – Faded or barely legible markings, overall aesthetics with clear signs of age. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code: \u003c\/strong\u003enot decipherable – RCA USA production, identifiable by 1960s constructive features\u003cstrong\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":57818460881244,"sku":"03639","price":84.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_19676d73-87cc-4aac-aaa3-21ca98bf3818.jpg?v=1780904265","url":"https:\/\/vacuumtubestreasures.com\/en-fr\/products\/12ax7-ecc83-rca-short-gray-plates-halo-getter-matched-pair-tubes-made-in-usa-60s","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}