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Marshall tube codes

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  • #1

    Marshall tube codes

    Not a complete list, but please update if you have any newer or historical references;

    VLVE-00007 12AT7/ECC81 No selection White Logo
    VLVE-00009 12AU7/ECC82 No selection White Logo
    VLVE-00010 EL34 Svetlana
    VLVE-00033 SV6550C Svetlana White Logo
    VLVE-00038 6V6GT Shuguang White Logo
    VLVE-00039 KT66 Shuguang White Logo
    VLVE-00042 EL34B Shuguang Gold Logo
    VLVE-00047 12AX7B/ECC83 Shuguang Low Microphony Gold Logo
    VLVE-00049 12AX7B/ECC83 Shuguang High Microphony Gold Logo
    VLVE-00055 12AX7B/ECC83 Shuguang No Selection White logo
    VLVE-00063 12AX7B/ECC83 Shuguang A Low Microphony White Logo
    VLVE-00064 12AX7B/ECC83 Shuguang B Low Microphony White Logo
    VLVE-00065 12AX7B/ECC83 Shuguang Gain Selected >=4V White Logo
    VLVE-00066 ECC83S JJ Low Microphony Red Logo
    VLVE-00066S ECC83S Microphonic Selection A
    VLVE-00067 ECC83S JJ Low Microphony Red Logo
    VLVE-00067S ECC83S Microphonic Selection A
    VLVE-00068 EL84 JJ Graded Low Anode Current Red Logo
    VLVE-00069 EL84 JJ Graded High Anode Current Red Logo
    VLVE-00070 EL34 JJ Graded Anode Current Red Logo
    VLVE-00071 EZ81 JJ No selection Red Logo
    VLVE-00077 KT66 Shuguang Graded Anode Current Gold Logo
    VLVE-00080 KT88 Shuguang Graded Anode Current Gold Logo
    VLVE-00083 5881/6L6WGC Shuguang Graded Anode Current Gold Logo replaces VLVE-00006
    VLVE-00087 EL34B Shuguang Graded Anode Current White Logo
    VLVE-00088 GZ34/5AR4 JJ No selection Red Logo Replaces VLVE-10043
    Tags: None
  • #2
    Here's the list with a few more additions;

    VLVE-00007 12AT7/ECC81 No selection White Logo
    VLVE-00009 12AU7/ECC82 No selection White Logo
    VLVE-00010 EL34 Svetlana
    VLVE-00033 SV6550C Svetlana White Logo
    VLVE-00038 6V6GT Shuguang White Logo
    VLVE-00039 KT66 Shuguang White Logo
    VLVE-00040 12AX7/ECC83 Philips-EI Black Logo
    VLVE-00041 12AX7/ECC83 Philips- EI White Logo
    VLVE-00042 EL34B Shuguang Gold Logo
    VLVE-00047 12AX7B/ECC83 Shuguang Low Microphony Gold Logo
    VLVE-00049 12AX7B/ECC83 Shuguang High Microphony Gold Logo
    VLVE-00055 12AX7B/ECC83 Shuguang No Selection White logo
    VLVE-00063 12AX7B/ECC83 Shuguang A Low Microphony White Logo
    VLVE-00064 12AX7B/ECC83 Shuguang B Low Microphony White Logo
    VLVE-00065 12AX7B/ECC83 Shuguang Gain Selected >=4V White Logo
    VLVE-00066 ECC83S JJ Low Microphony Red Logo
    VLVE-00066S ECC83S Microphonic Selection A
    VLVE-00067 ECC83S JJ Low Microphony Red Logo
    VLVE-00067S ECC83S Microphonic Selection A
    VLVE-00068 EL84 JJ Graded Low Anode Current Red Logo
    VLVE-00069 EL84 JJ Graded High Anode Current Red Logo
    VLVE-00070 EL34 JJ Graded Anode Current Red Logo
    VLVE-00071 EZ81 JJ No selection Red Logo
    VLVE-00077 KT66 Shuguang Graded Anode Current Gold Logo
    VLVE-00080 KT88 Shuguang Graded Anode Current Gold Logo
    VLVE-00083 5881/6L6WGC Shuguang Graded Anode Current Gold Logo replaces VLVE-00006
    VLVE-00092 EL34B Shuguang White Logo
    VLVE-00087 EL34B Shuguang Graded Anode Current White Logo
    VLVE-00088 GZ34/5AR4 JJ No selection Red Logo Replaces VLVE-10043
    VLVE-00092 EL34B Shuguang White Logo
    VLVE-00101 EL34B-STR Shuguang Graded Anode Current Gold Logo replaces VLVE-00092

    Comment

    • #3
      Updated list

      VLVE-00007 12AT7/ECC81 No selection White Logo
      VLVE-00009 12AU7/ECC82 No selection White Logo
      VLVE-00010 EL34 Svetlana
      VLVE-00033 SV6550C Svetlana White Logo
      VLVE-00038 6V6GT Shuguang White Logo
      VLVE-00039 KT66 Shuguang White Logo
      VLVE-00040 12AX7/ECC83 Philips-EI Black Logo
      VLVE-00041 12AX7/ECC83 Philips- EI White Logo
      VLVE-00042 EL34B Shuguang Gold Logo
      VLVE-00047 12AX7B/ECC83 Shuguang Low Microphony Gold Logo
      VLVE-00049 12AX7B/ECC83 Shuguang High Microphony Gold Logo
      VLVE-00055 12AX7B/ECC83 Shuguang No Selection White logo
      VLVE-00063 12AX7B/ECC83 Shuguang A Low Microphony White Logo
      VLVE-00064 12AX7B/ECC83 Shuguang B Low Microphony White Logo
      VLVE-00065 12AX7B/ECC83 Shuguang Gain Selected >=4V White Logo
      VLVE-00066 ECC83S JJ Low Microphony Red Logo
      VLVE-00066S ECC83S Microphonic Selection A
      VLVE-00067 ECC83S JJ Low Microphony Red Logo
      VLVE-00067S ECC83S Microphonic Selection A
      VLVE-00068 EL84 JJ Graded Low Anode Current Red Logo
      VLVE-00069 EL84 JJ Graded High Anode Current Red Logo
      VLVE-00070 EL34 JJ Graded Anode Current Red Logo
      VLVE-00071 EZ81 JJ No selection Red Logo
      VLVE-00077 KT66 Shuguang Graded Anode Current Gold Logo
      VLVE-00080 KT88 Shuguang Graded Anode Current Gold Logo
      VLVE-00083 5881/6L6WGC Shuguang Graded Anode Current Gold Logo replaces VLVE-00006
      VLVE-00092 EL34B Shuguang White Logo
      VLVE-00087 EL34B Shuguang Graded Anode Current White Logo
      VLVE-00088 GZ34/5AR4 JJ No selection Red Logo Replaces VLVE-10043
      VLVE-00092 EL34B Shuguang White Logo
      VLVE-00101 EL34B-STR Shuguang Graded Anode Current Gold Logo replaces VLVE-00092
      VLVE-00104 EL34 Tung-Sol black logo brown base

      Comment

      • #4
        "VLVE-00065 12AX7B/ECC83 Shuguang Gain Selected >=4V White Logo" What does the >=4V mean?
        Experience is something you get, just after you really needed it.

        Comment

        • #5
          Some of the lines are how the part was originally listed, or how it appeared on Marshall invoices. The same thing with "Microphonic selection A" and "Graded Anode Current" Maybe an internal reference against an unknown test procedure?

          Comment

          • #6
            Originally posted by nickb View Post
            "VLVE-00065 12AX7B/ECC83 Shuguang Gain Selected >=4V White Logo" What does the >=4V mean?
            Greater than or equal to.

            <= less than or equal to
            >= greater than or equal to

            Comment

            • #7
              Originally posted by kanks View Post
              Greater than or equal to.

              <= less than or equal to
              >= greater than or equal to
              No it not the symbols that are the issue....

              A spec like gm=1.6mA/V at 1ma and V=200V would make sense. I can only guess that is means the cut-off voltage is required to be >=4V at some unspecified plate voltage. But it's no more than that, a guess.
              Experience is something you get, just after you really needed it.

              Comment

              • #8
                I guess we'll have to wait for Mick's 'models where used' cross reference to get a better idea about that.
                Originally posted by Enzo
                I have a sign in my shop that says, "Never think up reasons not to check something."


                ​

                Comment

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