Who made this tube?

Discussion in 'Amp Central Station' started by craigh9, Jul 11, 2018.

  1. craigh9

    craigh9 Tele-Meister

    Aug 6, 2009
    I have a USA 6CA7 (EL34) tube. These are the only markings on it. Any clue who made it? IMG_2927.JPG
  2. uriah1

    uriah1 Doctor of Teleocity Ad Free Member

    Feb 12, 2011
    Look like sylvania fat boy
    OneHenry likes this.
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