21 12AX7 tube shootout in the V1 position

Discussion in 'The Workbench' started by EL 34, Jan 12, 2021.

  1. EL 34

    EL 34 Well-Known Member

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  2. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

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    Vintage Blackburn Mullard!! :uk: But I'm biased all my vintage tubes are Mullards.

    tubes01.jpg
     
  3. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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    he would have, IMO, served better to do short riffs & run through, then do the 2nd & cycle through.

    by the time you got to 21, you have no reference of a tube, more than the last tube...

    A couple that stuck out, although, I don't remember what they were, in the middle. The Telefunken #2 stuck out as smoother w/ a warm midrange.

    There were a couple more, in the middle, but, I'd have to go back & find them.

    The rest were mostly similar.

    There was one, that was an ANOS tube, in the middle, that, IMO, sounded hollow & nasally...
     
  4. StingRay85

    StingRay85 Well-Known Member

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    It's always a matter who good they still are. I'm still waiting for a more scientific and systematic approach on this in combination with a good player :) Good data on tubes is the very least to get me truely interested. But he made a good effort, he tested an RFT and also a long plate Philips (Bugle boy). What's interesting is that all my RFTs have a Mu of at least 102 on both triodes, while the long plate philips ('54-'59), have a Mu of around 90-95 (but a lot of variation in between, I have 20+ of those), Blackburn short plates around 92-97, Heerlen (Philips) also 90-95.
     
    Last edited: Jan 12, 2021
  5. mickeydg5

    mickeydg5 Well-Known Member

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    The only way to accurately or completely test them is to actually test them on a good mutual conductance tester.
    You need technical data for proper comparison along with actual use.

    A good current production Sovtek will test and sound better than a vintage crappy testing Mullard.
     
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  6. StingRay85

    StingRay85 Well-Known Member

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    I would gladly borrow my finest tubes to someone who can compare them the proper way and make a video like this. But go further than just V1, and don't spent too much time on those CP tubes, it's so clear they are not on the same level. See what happens when also changing V2 and V3. And then swap the power tubes to blackburn mullard as well. Then you got yourself a recording amp instead of an everyday player.
     
  7. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

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    The video triggered me, a pair of vintage Mullard 7025/12AX7A's are now inbound!
     
  8. EL 34

    EL 34 Well-Known Member

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    That Blackburn Mullard sounds just bitching...the 1st one in the video.
     
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  9. Filipe Soares

    Filipe Soares Well-Known Member

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    pete had one eye in the v1 and the other in the tone.
     
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  10. Old Punker

    Old Punker Well-Known Member

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    Buddy probably wore out that V1 socket with that test...
     
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  11. mickeydg5

    mickeydg5 Well-Known Member

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    Make sure they test good.
    Do you know how to do that?
    Is it a trustworthy known seller?
     
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  12. marshallmellowed

    marshallmellowed Well-Known Member

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    Like he mentioned, the differences are so insignificant, not worth fussing over. If I had to go with one, I'd probably pick the Shuguang 12AX7B.
     
  13. mickeydg5

    mickeydg5 Well-Known Member

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    Funny man!

    Pete may not think so unless he is a laid back guy. :)
     
  14. StingRay85

    StingRay85 Well-Known Member

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    Whats wrong with his right eye?
     
  15. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

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    No worries I have an Amplitrex AT1000 as does the seller.
     
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  16. SkyMonkey

    SkyMonkey Well-Known Member

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    It's a faffing pain in the ass, but you can try opening another instance of the vid (i.e. in a new window) and then you can line up the sections/tubes you want to A/B.
     
  17. StingRay85

    StingRay85 Well-Known Member

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    Another cool tube that was forgotten: the Siemens I62 and I63 ECC83 from the early 60s.
     
  18. Georgiatec

    Georgiatec Well-Known Member VIP Member

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    Looking for something I don't remember what.
    My avatar says it all. Can't beat old Mullards in Marshalls.
     
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  19. Ufoscorpion

    Ufoscorpion Well-Known Member

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    The telefunken struck me as being great sounding straight away and was definitely the best overall.
     
  20. kook

    kook Active Member

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    Appreciate what he has done but someone should cut this video up to hear the same riff from the different tubes consecutively
     
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