{"product_id":"philips-ecc83-12ax7-long-plates-mc2","title":"Philips ECC83 12AX7 Long Plates mC2","description":"\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eSoundlumia's Opinion\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-weight: bold;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(0, 0, 0);\"\u003eThe \"textbook Heerlen sound\" has been referenced in several Soundlumia ECC83\/12AX7 listings, and many tube enthusiasts asked what all that means. So here is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex\/Philips\/Valvo\/Miniwatt tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(0, 0, 0);\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(0, 0, 0);\"\u003eThe most distinctive sound feature of the Heerlen ECC83's is the transparent, natural and expansive midrange presentation, with a slight touch of warmth that illuminates your music. Every piece of music you play through these tubes sounds like from a vinyl record, whether your sound source is phono or not. The sound stage is spacious, deep and structured. Bass is incredibly deep but well controlled and feels as accurate as on the high end German ECC83's (Siemens, Telefunken, Valvo etc.) We would recommend these as an excellent choice if you are seeking the high end ECC83 tubes that can deliver the legendary Philips house sound flawlessly. Thanks to the super rare foil d-getter on this pair, you get with fast response (as in the solid-state fast), overwhelming detail in sound and the realistic bass - this is truly the Holy Grail sound of Philips ECC83 that one should not miss!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eMatched Pair - NOS\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cb\u003e(1957 NOS - Same Code)\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cb\u003ePhilips ECC83 Long Plates D-Foil Getter Matched Pair - Heerlen '57 mC2 - NOS\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$800.80\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/product_specs_watermarked_cd5499e0-95b3-44af-a4eb-a551bb2326f8.png?v=1781478138\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eMatched Pair - NOS+\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cb\u003ePhilips ECC83 Long Plates 45° D-Foil Getter Matched Pair - Heerlen 1957 mC2 – NOS+ - Same Code\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$845.00\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/1744299776067.png?v=1744301285\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eMatched Pair - NOS\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cb\u003ePhilips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - \u003c\/b\u003e\u003cstrong\u003eMatched Pair - Heerlen, NL '56 - NOS \u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$845.75\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003ca name=\"_Hlk169732138\"\u003e\u003c\/a\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis set was tested and certified by \u003cb\u003eRoeTest V11 Professional Tube Testing System\u003c\/b\u003e with the following result: \u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 1: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.55\/1.63 mA\/V - 97%\/102% (100% = 1.6 mA\/V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.112\/1.217 mA - 93%\/101% (100% = 1.2 mA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 2: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.55\/1.63 mA\/V - 97%\/102% (100% = 1.6 mA\/V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.12\/1.217 mA - 93%\/101% (100% = 1.2 mA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eAppearance \u0026amp; Cosmetic condition\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis pair stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved and the \u003cb\u003eIDENTICAL \u003c\/b\u003eacid-etched Heerlen date codes are perfectly visible on both tubes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003emC2 \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e6L \u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e(mC2 = ECC83 Long Plates production gen #2, \u003c\/span\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e = Heerlen\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e,\u003cb\u003e 6 = 1956\u003c\/b\u003e, L = December)\u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eMatched Pair - NOS+\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cstrong\u003ePhilips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Matched Pair - Heerlen, NL '56 - NOS+\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$922.25\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003ca name=\"_Hlk169732138\"\u003e\u003c\/a\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis set was tested and certified by \u003cb\u003eRoeTest V11 Professional Tube Testing System\u003c\/b\u003e with the following result: \u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 1: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.81\/1.64 mA\/V - 113%\/103% (100% = 1.6 mA\/V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.427\/1.255 mA - 119%\/105% (100% = 1.2 mA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 2: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.84\/1.65 mA\/V - 115%\/103% (100% = 1.6 mA\/V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.555\/1.51 mA - 130%\/126% (100% = 1.2 mA)\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eAppearance \u0026amp; Cosmetic condition\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis pair stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved and the \u003cb\u003eIDENTICAL \u003c\/b\u003eacid-etched Heerlen date codes are perfectly visible on both tubes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003emC2 \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e6L \u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e(mC2 = ECC83 Long Plates production gen #2, \u003c\/span\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e = Heerlen\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e,\u003cb\u003e 6 = 1956\u003c\/b\u003e, L = December)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eSingle Tube - Strong\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cstrong\u003ePhilips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Single Tube - Heerlen, NL '56 - Strong \u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$318.75\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003ca name=\"_Hlk169732138\"\u003e\u003c\/a\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis tube was tested and certified by \u003cb\u003eRoeTest V11 Professional Tube Testing System\u003c\/b\u003e with the following result: \u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 1: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.1\/1.29 mA\/V - 69%\/81% (100% = 1.6 mA\/V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.255\/1.277 mA - 105%\/106% (100% = 1.2 mA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eAppearance \u0026amp; Cosmetic condition\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis tube stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003emC2 \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e6K \u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e(mC2 = ECC83 Long Plates production gen #2, \u003c\/span\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e = Heerlen\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e,\u003cb\u003e 6 = 1956\u003c\/b\u003e, K = November)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(219, 118, 17); text-decoration: underline;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Arial',sans-serif;\"\u003eSingle Tube - NOS+\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003cstrong\u003ePhilips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Single Tube - Heerlen, NL '56 - NOS+ \u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e$425.80\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"color: rgb(217, 119, 21);\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003ca name=\"_Hlk169732138\"\u003e\u003c\/a\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis tube was tested and certified by \u003cb\u003eRoeTest V11 Professional Tube Testing System\u003c\/b\u003e with the following result: \u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eTube 1: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured transconductance(GM): 1.79\/1.88 mA\/V - 112%\/118% (100% = 1.6 mA\/V)\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eMeasured plate current(IA): 1.42\/1.6 mA - 118%\/133% (100% = 1.2 mA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eAppearance \u0026amp; Cosmetic condition\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003eThis tube stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003emC2 \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e6L \u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e(mC2 = ECC83 Long Plates production gen #2, \u003c\/span\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Cambria Math',serif; mso-bidi-font-family: 'Cambria Math';\"\u003e⊿\u003c\/span\u003e\u003c\/b\u003e\u003cb\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e = Heerlen\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif;\"\u003e,\u003cb\u003e 6 = 1956\u003c\/b\u003e, L = December)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Philips","offers":[{"title":"Matched Pair \/ 1957 NOS+ - Same Code","offer_id":50518669721920,"sku":"","price":845.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair \/ 1956 NOS - Same Code","offer_id":49523406471488,"sku":"","price":845.75,"currency_code":"USD","in_stock":true},{"title":"Matched Pair \/ 1956 NOS+ - Same Code","offer_id":49523406504256,"sku":"","price":922.25,"currency_code":"USD","in_stock":true},{"title":"Matched Pair \/ 1957 NOS - Same Code","offer_id":52121334710592,"sku":null,"price":800.8,"currency_code":"USD","in_stock":true},{"title":"Single Tube \/ 1956 NOS+","offer_id":49523406602560,"sku":"","price":425.8,"currency_code":"USD","in_stock":false},{"title":"Single Tube \/ 1956 Strong","offer_id":49523406635328,"sku":"","price":318.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/20240812_231802.jpg?v=1723698389","url":"https:\/\/www.soundlumia.com\/ja\/products\/philips-ecc83-12ax7-long-plates-mc2","provider":"Soundlumia","version":"1.0","type":"link"}