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 Well-Known 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 Well-Known 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 ?
     
    Headache likes this.
  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 Well-Known 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.
     
  15. thunderstruck507

    thunderstruck507 Well-Known Member

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    Anyone know who makes the KT88s in the 2203Kk?
     
  16. Len

    Len Well-Known Member

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    Some are described as "High Microphony"? Why would you want a high microphony tube?
     
  17. SkyMonkey

    SkyMonkey Well-Known Member

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    I have recently changed the valve in a 2nd hand MkII Valvestate VS65R for a JJ ECC83s. This greatly improved the tone of the amp in general and fixed the issues I experienced with the OD channel (buzzing & after-note artifacts). I think it also helped improve the onboard spring reverb and EQ somewhat, but I may be deluding myself (the bass knobs don't do much past 12 O'clock).

    The valve that came out was completely blank. No codes or writing of any sort. (I think I can see the faintest impression of a single J, offset in the middle of the ring of pins underneath, but that is it!
    This amp is from 1997 according to the bar code on the back panel, but there is no way of knowing if this was the original valve.

    Was this usually the case with the Valvestate amps. I am thinking that no one would purposefully replace the valve with something that has no provenance whatsoever. So did Marshall maybe put "No Brand" B-stock valves in Valvestate amps at the factory (Made in England).
     
  18. Melodyman

    Melodyman Member

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    Those tubes in the first pic with the white script logo and the EL 34 M appear to be Groove Tubes copy of the Mullard EL34, thus the M as this is how GT named them after the Mullards they were copied from.. Obviously rebranded for Marshall..GT also had EL 34 R for russian, EL 34 C for china etc..
     
  19. cooljuk

    cooljuk Active Member

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    From a 2016 1959HW:

    VLVE-00104 Marshall branded, black ink, marked "MADE IN RUSSIA" EL34s with brown bases. "TUNG-SOL" screened on bases.
    [​IMG]
    I don't think those have been listed in this thread yet.

    To me, they look like the similar brown base Tung-Sols from New Sensor without the Marshall logo, and with the different base printing. Same hook/spacers, getters and 5 spot welds per side.



    VLVE-00066 Red Ink short plate JJ 12AX7s are the preamp tubes in this one.
    [​IMG]
     
  20. L902

    L902 Member

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    Hi guys, I found an old Marshall 12ax7 in a JCM900 MKIII I picked up. It was in the phase inverter v3 spot and labelled VLVE-00052. I emailed Marshall to ask them what this tube was and they told me VLVE-00049 is the new code for VLVE-00052. I wrote back once more to confirm that they meant these tubes are identical and they said yes.

    VLVE-00052 is already in the list on this page as 'Shuguang High Microphony Gold Logo' but figured I would post this in case anyone wanted to update the list and add VLVE-00049.
     

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