stock marshall tube codes

Discussion in 'The Workbench' started by big dooley, Nov 26, 2010.

  1. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    "No Selection" means the preamp tube was not selected for a specific purpose. So it is an average or standard used tube as you put it.
    Selected tubes would be for gain or microphony level.
     
  2. dan_tramble

    dan_tramble Member

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    I have a couple of the gold "high micropony" tubes..

    Does this mean they have a high noise floor? What position would you use that tube in a amp?

    I have some red "low micropony" ones plus a half dozen of the standard 00055 white ones.

    Thanks
     
  3. Matus

    Matus New Member

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    Hi everyone..new to this forum! Owner of VM2466 which is currently waiting to be repaired :/ great amp tho!

    Anyway...as i was messing about trying to find out what's up with it, I pulled out all tubes to check them and that's what brought me to this thread...

    I have a ecc83 0066 in V1 and the rest are 0055...i'm about to change them too but I couldn't find any info on which is the right/better type of tube to use or of it's ok to mix and match like I had?!

    Thanks guys!
     
  4. EADGBE

    EADGBE Active Member

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    I have one like this. It says Marshall on it and it appears to be an EI.
     
  5. grainman

    grainman Active Member

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    i had stock tung sols el34 in my 1959slp is it current?
     
  6. Mark V

    Mark V New Member

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    My Red logo Marshall valve ECC83 is called vlve-90067. Are you saying this is the JJ low ?
     
  7. Herman Toothrot

    Herman Toothrot New Member

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    Hi! Some days ago, I was offered a matched quartet of 6550 marshall stock valves in a Spanish local shop, they were coded VLVE-00033, so I know they're winged "C" Svetlana. They also had a brown dot sticked on its base. I suppose these serve as markers for matching purposes, following some kind of color code. Does anyone knows if those colors are associated with some kind of values that should be taken into account in the re-biasing?

    Ps. English is not my mother tongue, sorry for any mistakes.
     
  8. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    Marshall does not color code power tubes as far as I know. So the brown stickers may indicate testing my another party.

    Winged C Svetlana tubes are good/great as long as they have not been worn out.
     
  9. deckard1

    deckard1 Member

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    I emailed Marshall tech support last week and the senior tech there said the new DSL's use TAD Mullard tubes.

    Just mentioning it.
     
  10. sellen

    sellen Active Member

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    VLVE-00049 12AX7B/ECC83 Shuguang High Microphony Gold Logo made my 1959hw more what i expect it would be . With the stock -VLVE-00066 ECC83S JJ Low Microphony Red Logo , it was a bit dull for my taste
    Just sayin' :)
     
  11. Joska

    Joska Member

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    IMG_0968.jpeg IMG_0969.jpeg Does anyone know who made this ones, i got them allmost for free and they do sound as good,if not better as Svetlana winged"C"?
     
  12. aussiebluesville

    aussiebluesville Active Member

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    New marshall coded el34 JJ logo on bottom ... 90105
    marshall coded 12ax7 ... 90066
    These are from the new DSL20HR/CR el34 1.jpg el34.jpg m12ax7  90066.JPG
     
  13. boola1

    boola1 Active Member

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    Old post I know but those look like Mullards. I see some writing on them. If they have XF4, they are Mullards which would explain why they sound so good, even though they are over 30 years old.
     
  14. jeffb

    jeffb Active Member

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    The power tubes look exactly like the newer JJ EL34II's. Not the original 34s, or 34Ls.

    I dig the II's. Been running them for a year pushed hard in my DSL.
     

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