{"product_id":"12ax7-ecc83-baldwin-by-sylvania-tested-pair-long-gray-plates-halo-getter-usa-60s","title":"12AX7 ECC83 Baldwin by SYLVANIA – Tested Pair – Long Gray Plates Halo Getter Made in USA","description":"\u003cp\u003e\u003cstrong\u003e12AX7 ECC83 Baldwin by SYLVANIA – Tested Pair – Long Gray Plates Halo Getter Made in USA\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"1013\" data-start=\"778\"\u003e This \u003cstrong data-end=\"832\" data-start=\"785\"\u003epair of 12AX7 (ECC83) Baldwin by SYLVANIA\u003c\/strong\u003e , made in the USA at the \u003cstrong data-end=\"913\" data-start=\"887\"\u003eEmporium, Pennsylvania\u003c\/strong\u003e factory, is from selections made for Baldwin organs in the late 1950s and early 1960s.\u003c\/p\u003e\n\n\u003cp data-end=\"1266\" data-start=\"1015\"\u003e The construction with \u003cstrong data-end=\"1054\" data-start=\"1034\"\u003eLong Gray Plates\u003c\/strong\u003e and \u003cstrong data-end=\"1072\" data-start=\"1057\"\u003eHalo Getter\u003c\/strong\u003e is one of the most recognizable and appreciated among the vintage Sylvania ECC83s, known for its fluid musical rendering, natural dynamic behavior and a great feeling of “organic” in the sound.\u003c\/p\u003e\n\n \u003cp data-end=\"1660\" data-start=\"1268\"\u003eThe tubes have been individually tested in our laboratory with \u003cstrong data-end=\"1360\" data-start=\"1339\"\u003eAMPLITREX AT-1000\u003c\/strong\u003e and show \u003cstrong data-end=\"1401\" data-start=\"1374\"\u003eGOOD \/ STRONG output\u003c\/strong\u003e , stable and reliable.\u003cbr data-end=\"1427\" data-start=\"1424\"\u003e These are not a matched pair nor are they tubes selected for critical stages: they are offered as \u003cstrong data-end=\"1552\" data-start=\"1527\"\u003eTested Pair Tubes\u003c\/strong\u003e , designed for those looking for \u003cstrong data-end=\"1629\" data-start=\"1576\"\u003emusicality, character and authentic sonic response\u003c\/strong\u003e , not laboratory symmetry.\u003c\/p\u003e\n\n\u003ch3 data-start=\"957\" data-end=\"984\"\u003e \u003cstrong\u003eSound Features:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"1705\" data-start=\"1690\"\u003e \u003cstrong\u003eLow range:\u003c\/strong\u003e Balanced and natural, with a bass that's present but never intrusive. It offers a solid foundation that supports the sound without weighing it down.\u003c\/p\u003e\n\n\u003cp data-end=\"1857\" data-start=\"1842\"\u003e \u003cstrong\u003eMidrange:\u003c\/strong\u003e The heart of the Sylvania signature: lively, fluid, and musical, with an open delivery that enhances guitars, vocals, and acoustic instruments. The mid-highs are legible without becoming aggressive.\u003c\/p\u003e\n\n \u003cp data-end=\"2061\" data-start=\"2047\"\u003e\u003cstrong\u003eHighs:\u003c\/strong\u003e The air and sweetness typical of Sylvania long plates. The highs are open but rounded, pleasant even at high volumes.\u003c\/p\u003e\n\n\u003cp data-end=\"2209\" data-start=\"2186\"\u003e \u003cstrong\u003eDynamics and Response:\u003c\/strong\u003e Prompt and natural response, with a musical behavior that follows the signal well. They don't seek artificial compression or hyper-control: what matters here is feel.\u003c\/p\u003e\n\n\u003ch3\u003e 🎸 \u003cstrong\u003eUse in Musical Instrument Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\n\u003cp data-end=\"2464\" data-start=\"2435\"\u003e Particularly suitable for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2517\" data-start=\"2467\"\u003e\n\n \u003cstrong data-end=\"2493\" data-start=\"2467\"\u003enon-critical positions\u003c\/strong\u003e (V2, V3, gain stages)\u003c\/li\u003e\n\n\u003cli data-end=\"2566\" data-start=\"2520\"\u003e \u003cstrong data-end=\"2566\" data-start=\"2534\"\u003evintage and boutique American\u003c\/strong\u003e amplifiers\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"2618\" data-start=\"2569\"\u003e musical cleans, soft crunch, natural dynamics\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"2628\" data-start=\"2620\"\u003e They offer:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2649\" data-start=\"2631\"\u003e rich harmonics\u003c\/li\u003e\n\n\u003cli data-end=\"2686\" data-start=\"2652\"\u003e good definition on attacks\u003c\/li\u003e\n\n\u003cli data-end=\"2727\" data-start=\"2689\"\u003e predictable and musical behavior\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"2826\" data-start=\"2729\"\u003e Not recommended as \u003cstrong data-end=\"2798\" data-start=\"2750\"\u003ea V1 in very high sensitivity amplifiers\u003c\/strong\u003e nor as \u003cstrong data-end=\"2825\" data-start=\"2807\"\u003ea phase inverter\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n \u003cp\u003eValve tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Conditions:\u003c\/strong\u003e \u003cspan\u003eVa = 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 GOOD \/ STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 1:\u003c\/strong\u003e\u003c\/p\u003e\n\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 = 1600 ; Ia = 1.0 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 2:\u003c\/strong\u003e\u003c\/p\u003e\n\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 = 1400 ; Ia = 1.1 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdiv\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Standard. Tested and approved for use in guitar amplifiers. Not recommended for the V1 position in high-sensitivity guitar amplifiers.\u003c\/span\u003e\n\u003c\/li\u003e\n\n \u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The sections have a moderate misalignment; this tube is suitable for use in non-critical stages (input\/driver) and in guitar amplifiers. Not recommended as a phase inverter or where perfect balance between the sections is required.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Smooth, fluctuation-free output suitable for any application.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage tubes - Tested and in perfect working order. Shipped 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\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n \u003cli\u003e312 026 → 312 indicates the manufacturer, i.e. Sylvania Electric Products Inc., Emporium, Pa. - 026 → 0 (out of three digits) → 1960 - 26 → 26th week of the year\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e 312 913 → 312 indicates the manufacturer, i.e. Sylvania Electric Products Inc., Emporium, Pa. - 913 → 9 (out of three digits) → 1959 - 26 → 26th week of the year\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":56083622855004,"sku":"03290","price":62.93,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_a4344b6f-99c3-4c98-89b6-f83ba0c09b69.jpg?v=1764257041","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/12ax7-ecc83-baldwin-by-sylvania-tested-pair-long-gray-plates-halo-getter-usa-60s","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}