{"product_id":"jan-chs-6sn7w-sylvania-us-navy-black-bakelite-base-tall-bottle-black-t-plates-chrome-top-usa","title":"JAN-CHS-6SN7W SYLVANIA US Navy Black Bakelite Base Tall Bottle Black T-Plates Chrome Top USA","description":"\u003ch3 class=\"p1\"\u003e\u003cstrong\u003eJAN‑CHS‑6SN7W SYLVANIA US Navy Black Bakelite Base Tall Bottle Black T‑Plates Chrome Top - Made in USA\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTubes tested on an \u003cstrong\u003eAmplitrex AT-1000 Tube tester\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -8V\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003eAverage 100% Gm = 2600 ; Ia = 9.0 mA\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTube\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1: \u003c\/strong\u003eGm = 2300 ; Ia = 8.0 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2: \u003c\/strong\u003eGm = 2500 ; Ia = 8.6 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003eAdditional Tests:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eMicrophonics and noise:\u003c\/b\u003e\u003c\/span\u003e Low. Tested and compliant for use in hi-fi equipment and guitar amplifiers, including the most sensitive audio stages.\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eBalance:\u003c\/b\u003e\u003c\/span\u003e Good. The sections exhibit a consistent balance, fully compatible with use in hi-fi environments and musical amplifiers, in all applications where absolute symmetry between sections is not required.\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eEmission:\u003c\/b\u003e\u003c\/span\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cb\u003eShorts \/ Gas:\u003c\/b\u003e\u003cspan class=\"s1\"\u003e none\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eRare and sought-after \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eU.S. military-grade JAN‑CHS‑6SN7W Sylvania\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, manufactured for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eU.S. Navy\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e supplies, as confirmed by the JAN-CHS designation and the characteristic anchor mark visible on the base. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6SN7W\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e version represents one of the most highly regarded professional variants of the 6SN7 family, built to strict specifications to offer solidity, stability, and reliability under demanding operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis specimen features the prestigious \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTall Bottle, Black T‑Plates, Chrome Top, and black bakelite base\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e configuration. A construction instantly recognizable and highly sought-after by American vacuum tube enthusiasts, capable of combining high historical interest, remarkable build quality, and excellent audio performance. Based on the construction characteristics, the production can be approximately attributed to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1950s\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube has been carefully measured with an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT‑1000\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The two sections recorded \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 2300 \/ Ia 8.0 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 2500 \/ Ia 8.6 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e respectively, values that confirm very strong emission and good overall balance. Operation was found to be stable and free of fluctuations, with no gas or shorts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003elow noise and microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allow for its use even in the most sensitive audio stages. It is particularly recommended for hi-fi preamplifiers, headphone amplifiers, driver stages, and guitar amplifiers. The sections exhibit good consistency and are fully suitable for all applications where absolute symmetry between the two triodes is not required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of sound, this JAN Sylvania offers the personality for which the early 6SN7Ws are particularly prized: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eopen, dynamic, and authoritative sound\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with natural and well-focused midrange, solid and articulated low frequencies, and extended highs without harshness. The responsive performance and remarkable separation capability contribute to an energetic, detailed, and musically engaging reproduction.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA proposal of high interest for those desiring an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eauthentic U.S. Navy JAN Sylvania 6SN7W\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, in the sought-after Tall Bottle construction with Black T‑Plates and Chrome Top: a specimen that is aesthetically very well preserved, carefully tested, and ready to enhance quality audio equipment.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cstrong\u003eConditions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eConditions:\u003c\/b\u003e\u003c\/span\u003e Vintage Tubes - Tested and perfectly functional. Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eFunctionality:\u003c\/b\u003e\u003c\/span\u003e Perfectly operational\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eAesthetic conditions:\u003c\/b\u003e\u003c\/span\u003e Excellent – Markings well preserved, minimal signs of aging. See photos for details.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing code:\u003c\/strong\u003e Code illegible. Production approximately attributable to the 1950s based on construction characteristics.\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":"SYLVANIA","offers":[{"title":"Default Title","offer_id":59288477630812,"sku":"03847","price":991.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_ffa6f48a-b34f-41b3-8957-9f821473e9c0.jpg?v=1790443054","url":"https:\/\/vacuumtubestreasures.com\/en-dk\/products\/jan-chs-6sn7w-sylvania-us-navy-black-bakelite-base-tall-bottle-black-t-plates-chrome-top-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}