{"product_id":"12ay7-ge-matched-pair-gray-ribbed-plates-halo-getter-tube-made-in-usa-60","title":"12AY7 GE Matched Pair Gray Ribbed Plates Halo Getter Tube Made In USA '60","description":"\u003ch3\u003e\u003cstrong\u003e12AY7 GE Matched Pair Gray Ribbed Plates Halo Getter Tube Made In USA '60\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eAMPLITREX Tested –\u003cspan\u003e STRONG - Vintage General Electric Production\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Test:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eVa = 250V, Vg = -4V\u003cstrong\u003e\u003cbr\u003eAverage 100%:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eGm = 1700 ; Ia = 3.0 mA\u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003c\/strong\u003e STRONG\u003c\/p\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: Gm = 1500 ; Ia = 2.7 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2\u003c\/strong\u003e: Gm = 1600 ; Ia = 2.7 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: Gm = 1300 ; Ia = 2.1 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2\u003c\/strong\u003e: Gm = 1500 ; Ia = 2.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\n\u003cstrong style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\n\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBurn-in \/ Stability Test:\u003c\/strong\u003e 48h – OK\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics and Noise:\u003c\/strong\u003e Low microphonics. Tested and compliant for use in hi-fi and guitar amplifiers. Noise is not ultra-low; recommended for use in V2, V3, V4, as a driver, or in less critical stages. Not recommended for V1.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The two sections show consistent and sufficiently aligned values, making the tube ideal for 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 steady 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\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePair of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AY7 General Electric Made in USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, authentic American production from GE's golden era, made with the sought-after \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003egray ribbed plates and halo getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e60-22\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e code dates the manufacturing to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e22nd week of 1960\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making this pair particularly interesting for vintage restorations, boutique amplifiers, and tube systems where an authentic vintage American footprint is desired.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 12AY7 offers lower gain compared to the 12AX7 and is highly appreciated for the greater progressivity, good dynamics, and control it can provide to preamplification stages. It represents a particularly interesting choice for vintage-style guitar amplifiers, driver stages, buffers, and hi-fi equipment designed for this tube type.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tubes have been carefully selected on an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and subjected to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e48 hours of burn-in\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, which they passed without instability. Tube 1 shows average values of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 1550 µmhos and Ia 2.7 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, while Tube 2 averages \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 1400 µmhos and Ia 2.25 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Emission was found to be \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003estrong, steady, and stable\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with no gas, shorts, or fluctuations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe pair has been matched for electrical characteristics and operating behavior. The first tube also offers excellent internal alignment, while the second maintains consistent values between sections. It is a selection particularly indicated for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eV2, V3, V4, driver stages, and less sensitive positions\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, where it can fully express the qualities of vintage GE production.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMicrophonics are low. While the noise floor is compatible with numerous audio applications, it does not make this pair the preferred choice for V1 or higher-gain inputs: its ideal use is in subsequent stages, where it offers solid and reliable performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of sound, these General Electrics are generally appreciated for a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edynamic, balanced, and well-defined\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e output, with controlled bass, present and natural mids, and clean high frequencies. In guitar amplifiers, they can contribute to a more manageable and progressive response, with good articulation and greater gain control.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThese are \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003etested and fully functional vintage tubes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with legible labels, very good aesthetic condition, and only slight signs of aging. Supplied in custom Vacuum Tubes Treasures boxes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA 1960 GE pair with an authentically American character, selected for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003estability after 48 hours of burn-in, low microphonics, and sought-after ribbed gray plates with halo getter construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\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\u003cspan\u003e Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.\u003c\/span\u003e\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 – Labels legible with slight signs of aging, no obvious defects. See photos for details.\u003cbr\u003eManufacturing Code:\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 60-22 → RMA\/EIA Open Date Code → manufactured in the 22nd week of 1960\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 lifespan\" 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":59251788054876,"sku":"03837T","price":1322.0,"currency_code":"NOK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/8_f9db87f3-42ac-4680-abae-aeb5c6be0b7f.jpg?v=1790176987","url":"https:\/\/vacuumtubestreasures.com\/en-no\/products\/12ay7-ge-matched-pair-gray-ribbed-plates-halo-getter-tube-made-in-usa-60","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}