{"product_id":"6bq5-el84-sylvania-for-hammond-black-plates-matched-tubes-made-in-usa-66","title":"6BQ5 EL84 SYLVANIA for Hammond Matched Pair Black Plates Tubes Made in USA '64","description":"\u003cp\u003e\u003cstrong\u003e6BQ5 ( EL84 ) SYLVANIA for Hammond Matched Pair Black Plates Tubes Made in USA '64\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"0\" data-end=\"706\"\u003eThis \u003cstrong data-start=\"37\" data-end=\"91\"\u003ematched pair of 6BQ5 \/ EL84 SYLVANIA for Hammond\u003c\/strong\u003e , \u003cstrong data-start=\"104\" data-end=\"124\"\u003eMade in USA production 1964\u003c\/strong\u003e , belongs to one of the most sought-after series supplied by Sylvania for Hammond organs of the time, famous for reliability, rigorous selection and above-average durability.\u003cbr data-start=\"299\" data-end=\"302\"\u003eThe units feature \u003cstrong data-start=\"327\" data-end=\"343\"\u003eblack plates\u003c\/strong\u003e , solid construction and typically American build quality, designed to ensure operational stability even under continuous use. \u003cbr data-start=\"500\" data-end=\"503\"\u003eThe pair is selected as a \u003cstrong data-start=\"532\" data-end=\"548\"\u003eMatched Pair\u003c\/strong\u003e for coherent electrical behavior and uniform tonal response, ideal for hi-fi amplifiers and for restorations of vintage American organs and amplifiers.\u003c\/p\u003e\n\u003cp data-start=\"708\" data-end=\"889\"\u003e\u003cstrong data-start=\"710\" data-end=\"736\"\u003eSound Characteristics\u003c\/strong\u003e\u003cbr data-start=\"736\" data-end=\"739\"\u003eThe timbre of the Sylvania EL84\/6BQ5 with black plates is lively, musical and well-balanced, with a defined character and remarkable dynamic capacity.\u003c\/p\u003e\n\u003cp data-start=\"891\" data-end=\"1041\"\u003e\u003cstrong data-start=\"891\" data-end=\"900\"\u003eBass\u003c\/strong\u003e\u003cbr data-start=\"900\" data-end=\"903\"\u003eTight, fast, and controlled. The low range is precise and solid, with excellent rhythmic and articulation capabilities without bloating.\u003c\/p\u003e\n\u003cp data-start=\"1043\" data-end=\"1237\"\u003e\u003cstrong data-start=\"1043\" data-end=\"1051\"\u003eMedium\u003c\/strong\u003e\u003cbr data-start=\"1051\" data-end=\"1054\"\u003eClear, rich in harmonics, and very natural. Vocals emerge with presence and good texture, while acoustic and jazz instruments benefit from a bright, well-refined midrange.\u003c\/p\u003e\n\u003cp data-start=\"1239\" data-end=\"1410\"\u003e\u003cstrong data-start=\"1239\" data-end=\"1247\"\u003eHigh\u003c\/strong\u003e \u003cbr data-start=\"1247\" data-end=\"1250\"\u003eOpen, fluid, and well-extended. No harshness, clean, detailed highs with a controlled brilliance typical of the best Sylvania productions of the era.\u003c\/p\u003e\n\u003cp data-start=\"1412\" data-end=\"1623\"\u003e\u003cstrong data-start=\"1412\" data-end=\"1424\"\u003eDynamics\u003c\/strong\u003e\u003cbr data-start=\"1424\" data-end=\"1427\"\u003eLively, responsive, and with plenty of headroom. The black plates deliver a crisp, linear, and stable response even under load, making them excellent for amplifiers requiring precision and responsiveness.\u003c\/p\u003e\n\u003cp data-start=\"1625\" data-end=\"1768\"\u003e\u003cstrong data-start=\"1625\" data-end=\"1639\"\u003eSoundstage\u003c\/strong\u003e\u003cbr data-start=\"1639\" data-end=\"1642\"\u003eWide, defined, and realistic soundstage. Good depth and instrument separation, with a stable and uncluttered soundstage.\u003c\/p\u003e\n\u003cp data-start=\"1770\" data-end=\"1826\"\u003e🎧 \u003cstrong data-start=\"1773\" data-end=\"1810\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"1810\" data-end=\"1813\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1829\" data-end=\"1891\"\u003eAmerican and European amplifiers using real EL84s,\u003c\/li\u003e\n\u003cli data-start=\"1894\" data-end=\"1935\"\u003erestorations of vintage Hammond equipment,\u003c\/li\u003e\n\u003cli data-start=\"1938\" data-end=\"1979\"\u003esingle-ended and push-pull amplifiers,\u003c\/li\u003e\n\u003cli data-start=\"1982\" data-end=\"2030\"\u003esystems that require transparency and dynamics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2032\" data-end=\"2145\"\u003eThe character of Sylvania black plates is particularly suitable for jazz, classical, acoustic and vocal music.\u003c\/p\u003e\n\u003cp data-start=\"2147\" data-end=\"2230\"\u003e🎸 \u003cstrong data-start=\"2150\" data-end=\"2183\"\u003eUse in Music Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"2183\" data-end=\"2186\"\u003eParticularly effective in amplifiers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2233\" data-end=\"2243\"\u003eHammond,\u003c\/li\u003e\n\u003cli data-start=\"2246\" data-end=\"2263\"\u003evintage Gibson,\u003c\/li\u003e\n\u003cli data-start=\"2266\" data-end=\"2297\"\u003eEL84 style boutique projects,\u003c\/li\u003e\n\u003cli data-start=\"2300\" data-end=\"2351\"\u003eamplifiers with hot bias or moderate voltages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2353\" data-end=\"2370\"\u003eStrengths:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2373\" data-end=\"2407\"\u003emusical and progressive break-up,\u003c\/li\u003e\n\u003cli data-start=\"2410\" data-end=\"2443\"\u003erich and controlled harmonics,\u003c\/li\u003e\n\u003cli data-start=\"2446\" data-end=\"2463\"\u003eexcellent sustain,\u003c\/li\u003e\n\u003cli data-start=\"2466\" data-end=\"2507\"\u003etight and well-defined response on the strings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2509\" data-end=\"2620\"\u003e🎯 \u003cstrong data-start=\"2512\" data-end=\"2544\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2509\" data-end=\"2620\"\u003eAn ideal pair for restorations, upgrades or use in hi-fi and music amplifiers requiring robust, musical and coherent EL84s.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eValve tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e \u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eVa = 250V, Vg2 = 250V, Vg = -7.3V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e \u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eGm = 11.3 ; Ia = 48 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve 1:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eGm = 9.4 ; Ia = 40.2 mA\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eValve 2:\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eGm = 9.5 ; Ia = 40.2 mA\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and approved for use in hi-fi and guitar amplifiers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\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\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e Very good – Clearly legible writing with minor signs of wear, no obvious defects. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e312 64-13 → 312 indicates the manufacturer, i.e., Sylvania Electric Products Inc., Emporium, Pa. - 64-13 → RMA\/EIA Open Date Code → manufactured 13th week of 1964\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":43657424601335,"sku":"01063","price":79.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_0354cdd9-7c30-497b-b4c5-381d0f88e3ce.jpg?v=1765466833","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/6bq5-el84-sylvania-for-hammond-black-plates-matched-tubes-made-in-usa-66-en","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}