11 Tubes manufactured by General Electric

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  12AU7A

  Branded General Electric

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  12AX7

  Branded General Electric

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  12AX7

  General Electric

  Branded Kinsman

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  12BY7

  General Electric

  Branded Tektronix

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  2C51

  Branded General Electric

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  6386

  Branded General Electric

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  6386

  General Electric

  Branded Heintz & Kaufman

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  6681

  General Electric

  Branded Motorola

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  7027A

  RCA

  Branded General Electric

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  7189A

  Branded General Electric

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  6CA7, EL34, XF4

  Mullard

  Branded General Electric