{"product_id":"12ax7-ecc83-ge-long-gray-plates-halo-getter-balanced-low-noise-mic-made-in-usa","title":"12AX7 \/ ECC83 GE Long Gray Plates Halo Getter - Balanced - Low Noise \u0026 Mic - Made in USA","description":"\u003cp\u003e\u003cstrong\u003e12AX7 \/ ECC83 GE Long Gray Plates Halo Getter Made in USA '65\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested – Balanced Sections – Low Noise \u0026amp; Microphonics\u003c\/b\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 General Electric\u003c\/b\u003e\u003c\/span\u003e, manufactured in the United States in \u003cspan class=\"s1\"\u003e\u003cb\u003eMarch 1965\u003c\/b\u003e\u003c\/span\u003e, is a classic American signal tube from one of General Electric's most acclaimed productions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe internal construction is typical of GE at the time, featuring \u003cspan class=\"s1\"\u003e\u003cb\u003eLong Gray Plates\u003c\/b\u003e\u003c\/span\u003e and a \u003cspan class=\"s1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/span\u003e, a configuration now highly sought after for its reliability, operational stability, and balanced musicality.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe tube has been thoroughly tested in our laboratory using the \u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e, receiving a \u003cspan class=\"s1\"\u003e\u003cb\u003eSTRONG\u003c\/b\u003e\u003c\/span\u003e rating. It also exhibited \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e, a particularly desirable characteristic for hi-fi applications and sensitive circuits.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eElectrically, it shows very consistent performance and perfectly balanced sections, qualities that enhance its versatility in use.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003eSonic Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eGE Long Gray Plates from the 1960s are valued for a balanced, natural, and well-organized sound presentation, with an open and musical timbre that easily adapts to many system types.\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\"\u003eWell-extended and controlled. The low range is stable and articulate, with a good sense of order and depth.\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\"\u003eClear, natural, and well-focused. Vocals maintain presence and intelligibility, while acoustic instruments are reproduced with balance and timbral accuracy.\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\"\u003eOpen and airy. The high end is clean and well-extended, contributing to a detailed yet always pleasing sound presentation.\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\"\u003eResponsive and linear. Dynamic variations are reproduced naturally and with good consistency across the entire audio spectrum.\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 stable and well-organized, with correct instrument separation and good image focus.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎧 \u003c\/span\u003eUse in Hi-Fi Amplifiers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis 12AX7 \/ ECC83 GE is particularly suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003etube preamplifiers\u003c\/li\u003e\n\n\u003cli\u003ephono stages\u003c\/li\u003e\n\n\u003cli\u003edriver stages\u003c\/li\u003e\n\n\u003cli\u003eintegrated amplifiers\u003c\/li\u003e\n\n\u003cli\u003ecompatible vintage and modern hi-fi equipment\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThe combination of \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise\u003c\/b\u003e\u003c\/span\u003e, \u003cspan class=\"s1\"\u003e\u003cb\u003econtained microphonics\u003c\/b\u003e\u003c\/span\u003e, and \u003cspan class=\"s1\"\u003e\u003cb\u003eperfectly balanced sections\u003c\/b\u003e\u003c\/span\u003e makes it suitable for sensitive circuit positions, including applications such as phase inverters.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎸 \u003c\/span\u003eUse in Musical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis GE Long Gray Plates is also popular in musical instrument amplifiers thanks to its:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003ebalanced dynamic response\u003c\/li\u003e\n\n\u003cli\u003egood signal definition\u003c\/li\u003e\n\n\u003cli\u003enatural musical character\u003c\/li\u003e\n\n\u003cli\u003estable and predictable behavior\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThese characteristics make it interesting for both studio use and compatible vintage and boutique amplifiers.\u003c\/p\u003e\n\u003ch3 class=\"p3\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎯 \u003c\/span\u003eNote for Audiophiles\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eGeneral Electric – Made in USA\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eProduction: March 1965\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eLong Gray Plates – Halo Getter\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eSTRONG\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\u003cb\u003ePerfectly Balanced Sections\u003c\/b\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p2\"\u003eThis 12AX7 GE represents a solid American selection from the 1960s, capable of offering balance, reliability, and musicality in a classic and highly appreciated configuration.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eAn authentic vintage tube, selected according to Vacuum Tubes Treasures standards, ideal for those seeking a well-preserved, quiet, and perfectly usable American ECC83 in numerous hi-fi and musical applications.\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:\u003c\/strong\u003e 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 = 1400 ; Ia = 0.9 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2\u003c\/strong\u003e: Gm = \u003cmeta charset=\"utf-8\"\u003e1400 ; Ia = 0.9 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 Noise \u0026amp; Microphonics – Tested and suitable for use in hi-fi systems and guitar amplifiers.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e Sections are consistent and perfectly aligned, making the tube suitable for use as a phase inverter in hi-fi and instrument applications.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Strong – Strong and consistent 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\u003eCondition:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\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\u003eCosmetic Condition:\u003c\/strong\u003e\u003cspan\u003e Good – Markings partially faded, but still legible. Tube body in good condition. 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\u003cp\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eFU 188 → two-letter code → March 1965 production - 188 → General Electric Company, Syracuse 1, N. Y.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\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\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":57765059920220,"sku":"03618T","price":672.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_32b0dcc1-d54f-40fe-a398-d32d9f1ab59d.jpg?v=1780133239","url":"https:\/\/vacuumtubestreasures.com\/en-se\/products\/12ax7-ecc83-ge-long-gray-plates-halo-getter-balanced-low-noise-mic-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}