{"product_id":"6ca7-el34-philips-eindhoven-metal-base-one-piece-disc-getter-matched-pair-tubes-holland","title":"6CA7 EL34 AMPEREX by PHILIPS Eindhoven Metal Base '55 One-Piece Disc Getter Matched Pair Amplitrex Tested Curves Included","description":"\u003cp\u003e\u003cstrong\u003e6CA7 ( EL34 ) AMPEREX by PHILIPS Eindhoven Metal Base One piece Disc Getter Matched Pair Tubes Made in Holland '55\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"552\" data-start=\"208\"\u003e The PHILIPS Eindhoven \u003cstrong data-end=\"261\" data-start=\"243\"\u003emetal-base\u003c\/strong\u003e 6CA7 (EL34) tubes, produced in Holland in 1955 for AMPEREX, represent one of the rarest and most prestigious versions of this iconic power tube. These are \u003cstrong data-end=\"420\" data-start=\"405\"\u003efirst-series\u003c\/strong\u003e examples, with \u003cstrong data-end=\"454\" data-start=\"426\"\u003eone-piece disc getters\u003c\/strong\u003e and extremely high-quality internal construction, made in the Philips factory in Eindhoven.\u003c\/p\u003e\n\n \u003cp data-end=\"936\" data-start=\"554\"\u003eThis \u003cstrong data-end=\"584\" data-start=\"568\"\u003ematched\u003c\/strong\u003e pair, although used, has been tested with \u003cstrong data-end=\"645\" data-start=\"635\"\u003eSTRONG\u003c\/strong\u003e results, demonstrating full efficiency and still guaranteeing a long operating life. The metal base, a trademark of early European production, is considered by many audiophiles and collectors to be the maximum expression of the 6CA7\/EL34 for sonic transparency, robustness and historical appeal.\u003c\/p\u003e\n\n\u003ch3 data-end=\"985\" data-start=\"938\"\u003e Timbre characteristics and sound output\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"1105\" data-start=\"988\"\u003e\n\n \u003cstrong data-end=\"998\" data-start=\"988\"\u003eBass:\u003c\/strong\u003e deep, fast and rock-solid, with an immediate response that gives authority and control to the low range.\u003c\/li\u003e\n\n\u003cli data-end=\"1243\" data-start=\"1108\"\u003e\n\n \u003cstrong data-end=\"1117\" data-start=\"1108\"\u003eMids:\u003c\/strong\u003e Transparent and refined, with a natural balance that delivers vocals and acoustic instruments in all their authenticity.\u003c\/li\u003e\n\n\u003cli data-end=\"1345\" data-start=\"1246\"\u003e\n\n \u003cstrong data-end=\"1255\" data-start=\"1246\"\u003eHighs:\u003c\/strong\u003e airy, bright and never aggressive, with a detail that enriches without weighing down.\u003c\/li\u003e\n\n\u003cli data-end=\"1472\" data-start=\"1348\"\u003e \n\u003cstrong data-end=\"1361\" data-start=\"1348\"\u003eDynamics:\u003c\/strong\u003e explosive and coherent, capable of faithfully following the most complex variations without loss of definition.\u003c\/li\u003e\n\n\u003cli data-end=\"1571\" data-start=\"1475\"\u003e\n\n \u003cstrong data-end=\"1490\" data-start=\"1475\"\u003eSoundstage:\u003c\/strong\u003e wide and three-dimensional, with stable imaging and great perspective depth.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-end=\"1594\" data-start=\"1573\"\u003e 🎧 Hi-Fi use\u003c\/h3\u003e\n\n\u003cp data-end=\"1805\" data-start=\"1595\"\u003e Perfect for reference tube amplifiers (Quad II, Leak, Marantz, etc.), these Philips Metal Bases bring out the musicality of the EL34 series to the fullest, combining unmatched refinement and power.\u003c\/p\u003e\n\n\u003ch3 data-end=\"1845\" data-start=\"1807\"\u003e 🎸 Use in Music Amplifiers\u003c\/h3\u003e\n\n\u003cp data-end=\"2019\" data-start=\"1846\"\u003e In the guitar and musical fields, they guarantee a full-bodied and dynamic sound, with rich harmonics and a creamy saturation that made the first European EL34s legendary.\u003c\/p\u003e\n\n\u003ch3 data-end=\"2064\" data-start=\"2021\"\u003e 🎯 Note for audiophiles and collectors\u003c\/h3\u003e\n\n \u003cp data-end=\"2444\" data-start=\"2065\"\u003ePhilips Eindhoven Metal Bases are among the \u003cstrong data-end=\"2138\" data-start=\"2109\"\u003emost sought-after and rare EL34s\u003c\/strong\u003e , considered by many to be the \"definitive version\" of this tube. This matched pair— \u003cstrong data-end=\"2255\" data-start=\"2227\"\u003eused but STRONG tested\u003c\/strong\u003e —represents an unmissable opportunity for anyone wishing to own a piece of 1950s European tube manufacturing history, combining collectible value with exceptional sound quality.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp\u003e Valve 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 = 500V; Vg2 = 450; Vg = -36.5V\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 = 6.5 ; Ia = 50 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Result:\u003c\/strong\u003e STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eValve 1:\u003c\/strong\u003e Gm = 5.8 ; Ia = 36 mA\u003c\/p\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eValve 2:\u003c\/strong\u003e Gm = 5.9 ; Ia = 35 mA\u003c\/p\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 hi-fi and guitar amplifiers.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\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\u003eConditions:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eVintage Tubes - Tested and in perfect working order. Comes 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\u003eAesthetic condition:\u003c\/strong\u003e \u003cspan\u003eFair – Writing almost completely faded, with obvious signs of wear on the metal base. 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\n\u003cp\u003e \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e SY0 55F - \u003cstrong data-end=\"105\" data-start=\"98\"\u003eSY0\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e → Series code (EL34 metal base \u003cem data-end=\"146\" data-start=\"123\"\u003eone-piece disc getter\u003c\/em\u003e ), \u003cstrong\u003e5\u003c\/strong\u003e  \u003cmeta charset=\"utf-8\"\u003e→\u003cmeta charset=\"utf-8\"\u003e Philips Eindhoven, \u003cstrong data-start=\"59\" data-end=\"80\"\u003e5F\u003c\/strong\u003e → June 1955 ( \u003cem data-is-only-node=\"\" data-end=\"169\" data-start=\"166\"\u003eF\u003c\/em\u003e = 6th month).\u003c\/li\u003e\n\n\u003cli\u003e SY0 56L -\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-end=\"105\" data-start=\"98\"\u003eSY0\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e → Series code (EL34 metal base \u003cem data-end=\"146\" data-start=\"123\"\u003eone-piece disc getter\u003c\/em\u003e ), \u003cstrong\u003e5\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e →\u003cmeta charset=\"utf-8\"\u003e Philips Eindhoven, \u003cstrong data-start=\"59\" data-end=\"80\"\u003e6L\u003c\/strong\u003e →\u003cmeta charset=\"utf-8\"\u003e December 1956 ( \u003cem data-end=\"268\" data-start=\"265\"\u003eL\u003c\/em\u003e = 12th month)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"AMPEREX","offers":[{"title":"Default Title","offer_id":55471230714204,"sku":"03109","price":849.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_5730e83e-fc43-4842-be5e-febf418793e7.jpg?v=1757776931","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/6ca7-el34-philips-eindhoven-metal-base-one-piece-disc-getter-matched-pair-tubes-holland","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}