{"product_id":"12ax7-ecc83-baldwin-by-raytheon-long-black-plates-halo-getter-tested-tube-made-in-usa","title":"12AX7 \/ ECC83 NOS Baldwin by RAYTHEON Long Black plates Halo Getter Tested Balanced Tube USA","description":"\u003ch3\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003e12AX7 \/ ECC83 NOS Baldwin by RAYTHEON Long Black plates Halo Getter Tested Tube \u003c\/strong\u003e\u003cstrong\u003eMade in USA\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAMPLITREX Tested – VERY STRONG – Balanced \u003cmeta charset=\"utf-8\"\u003e– Vintage American Raytheon Production\u003c\/strong\u003e\u003c\/p\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 Gm = 1600 ; Ia = 1.2 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\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\u003cspan\u003e Gm = 1700 ; Ia = 1.1 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e Gm = \u003cmeta charset=\"utf-8\"\u003e1700 ; Ia = \u003cmeta charset=\"utf-8\"\u003e1.1 mA\u003c\/span\u003e\n\n\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\u003eBurn-in \/ Stability Test:\u003c\/strong\u003e 48h – OK\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Standard. Tested and compliant for use in hi-fi equipment and guitar amplifiers. Recommended for V2, V3, and V4 positions, as a driver, or in less critical stages. For V1 and high-gain positions particularly sensitive to microphonics, we recommend a low-microphonic selected tube.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e Excellent - The sections are consistent and well-matched, making the tube also suitable for use as a phase inverter in hi-fi and musical instrument 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\u003eShorts and GAS:\u003c\/strong\u003e None.\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 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AX7 \/ ECC83 NOS Baldwin-branded\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e tube is an original \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRaytheon\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e production, manufactured in the United States during the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e29th week of 1961\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as confirmed by the RMA\/EIA code \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eP280 61-29C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Originally intended for Baldwin equipment, it features the sought-after Raytheon construction with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003elong black plates and halo getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, typical characteristics of high-quality American production from that era.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eProfessionally tested with an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, it provided results significantly higher than the average reference values: both sections measure \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 1700 and Ia 1.1 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, highlighting a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003every strong, stable, and perfectly uniform\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e emission. The 48-hour burn-in was passed successfully, with no fluctuations, shorts, or gas present.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ebalance is excellent\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with identical values between the two triodes. This feature makes the tube particularly suitable as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ephase inverter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as well as in driver stages and hi-fi or musical instrument applications that require symmetrical and predictable performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis unit has \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003estandard microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: it is fully suitable for hi-fi and guitar amplifiers in positions V2, V3, and V4, as a driver, or in less critical stages. For V1 and high-gain inputs particularly sensitive to microphonics, a specifically selected low-microphonic tube is preferred.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFrom a sound perspective, this Raytheon production is appreciated for its \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edynamic, natural, and well-defined\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e output, accompanied by good tonal consistency and a balanced response. A noteworthy NOS specimen capable of combining \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003evintage American construction, very strong emission, and perfect electrical matching between sections\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 NOS - New Old Stock - Tested and 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\u003eCosmetic Condition:\u003c\/strong\u003e\u003cspan\u003e Good – Markings are clearly legible with slight signs of aging. See photos for details.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e P28061-29C → 280 → Raytheon Manufacturing Company, Waltham 54, Mass. ; 61-29 → RMA\/EIA Open Date Code → manufactured in the 29th week of 1961\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":59600201613660,"sku":"03887","price":92.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_22241385-4b47-4275-9625-548a1618c13b.jpg?v=1792505472","url":"https:\/\/vacuumtubestreasures.com\/en-us\/products\/12ax7-ecc83-baldwin-by-raytheon-long-black-plates-halo-getter-tested-tube-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}