{"id":15127,"date":"2025-05-02T19:06:22","date_gmt":"2025-05-03T00:06:22","guid":{"rendered":"https:\/\/busther.com.co\/tienda\/uncategorized\/pair-of-vintage-sylvania-6sn7gtb-twin-triode-vacuum-tubes\/"},"modified":"2025-05-02T19:06:22","modified_gmt":"2025-05-03T00:06:22","slug":"pair-of-vintage-sylvania-6sn7gtb-twin-triode-vacuum-tubes","status":"publish","type":"product","link":"https:\/\/busther.com.co\/en\/shop\/electronic-components\/active-components\/vacuum-tubes\/american-series-vacuum-tubes\/6\/6s\/6sn7\/pair-of-vintage-sylvania-6sn7gtb-twin-triode-vacuum-tubes\/","title":{"rendered":"Pair of Vintage Sylvania 6SN7GTB Twin Triode Vacuum Tubes"},"content":{"rendered":"

Pair of Vintage Sylvania 6SN7GTB Twin Triode Vacuum Tubes \u2013 Factory Codes 544C & 552C<\/strong><\/h1>\n
<\/div>\n

The Sylvania 6SN7GTB is another twin triode vacuum tube, a classic design that is highly regarded in the world of vintage audio and high-fidelity (Hi-Fi) equipment.<\/p>\n

\"Sylvania
{%CAPTION%}<\/figcaption><\/figure>\n

Key Specifications<\/strong><\/h3>\n
    \n
  • \n

    Type: Twin Triode (Audio\/Signal Amplification)<\/p>\n<\/li>\n

  • \n

    Heater Voltage (Vf): 6.3V<\/p>\n<\/li>\n

  • \n

    Heater Current (If): 0.6A<\/p>\n<\/li>\n

  • \n

    Pin Configuration: Octal (8-pin base)<\/p>\n<\/li>\n

  • \n

    Amplification Factor (\u03bc): Approximately 20<\/p>\n<\/li>\n

  • \n

    Plate Resistance (Rp): Approximately 7.7 k\u03a9<\/p>\n<\/li>\n

  • \n

    Applications: Preamplifiers, output stages, and electronic test and measurement equipment.<\/p>\n<\/li>\n

  • \n

    GTB Variant: An improved version of the GT\/GTB series featuring extended service life, enhanced reliability, and better internal insulation for demanding applications.<\/p>\n<\/li>\n<\/ul>\n

    History and Origins of the 6SN7GTB<\/strong><\/h3>\n
      \n
    • \n

      Manufacturer: Sylvania Electric Products (USA), one of the major vacuum tube manufacturers alongside RCA, General Electric (GE), and Philips.<\/p>\n<\/li>\n

    • \n

      Production Era: 1950s\u20131970s (Post-World War II era)<\/p>\n<\/li>\n

    • \n

      Differences Between GT, GTA, and GTB:<\/strong><\/p>\n

        \n
      • \n

        GT (Glass Tubular): Standard version of the tube design.<\/p>\n<\/li>\n

      • \n

        GTA: Improved heater design and internal construction enhancements.<\/p>\n<\/li>\n

      • \n

        GTB: Most advanced version, featuring improved insulation, enhanced reliability, and extended service life.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

        \"{%ALT_TEXT%}\"
        {%CAPTION%}<\/figcaption><\/figure>\n

        Equipment That Used the 6SN7GTB<\/strong><\/h3>\n
          \n
        • \n

          Hi-Fi Audio and Vintage Equipment:<\/strong><\/p>\n

            \n
          • \n

            Vacuum Tube Amplifiers (McIntosh, Dynaco, Marantz, Fisher)<\/p>\n<\/li>\n

          • \n

            High-End Preamplifiers<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

          • \n

            Military and Industrial Instrumentation:<\/strong><\/p>\n

              \n
            • \n

              Oscilloscopes, signal generators, and electronic test equipment.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

            • \n

              Electric Guitar Equipment:<\/strong><\/p>\n

                \n
              • \n

                Some vintage guitar amplifiers (less common than the 12AX7).<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                  \n
                • \n

                  Warm and Detailed Sound: A favorite among audiophiles for its smooth, linear response and excellent tonal characteristics.<\/p>\n<\/li>\n

                • \n

                  Durability: GTB tubes generally offer a longer service life compared to GT\/GTA versions.<\/p>\n<\/li>\n

                • \n

                  Second-Hand Market: Highly sought after and commonly sold through audio forums, eBay, and specialized vacuum tube retailers.<\/p>\n<\/li>\n<\/ul>\n

                  Item Condition: Tested, without original boxes (see photos of the test results).<\/p>\n","protected":false},"excerpt":{"rendered":"

                  \"344_1.png\"<\/h5>\n
                  <\/h5>\n

                  Enhance the warmth and fidelity of your audio system with these vintage twin triode vacuum tubes. These two classic tubes are ideal for preamplifiers, phase inverter stages, and vintage audio restorations.
                  Although they are not a matched pair (electronically matched), both units have been tested on a Kyoritsu tube tester, confirming excellent emission readings and reliable performance.
                  They retain their classic vintage appearance and include branded boxes. An authentic and functional choice for audiophiles, collectors, and restoration technicians seeking high-quality vintage vacuum tubes.<\/p>\n

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