KT88 Recommendation for my Modena M90

Discussion in 'Amps and Cabs' started by sled, Jan 18, 2008.

  1. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    Had a KT88 fry last night...

    any brand recommendations...
     
  2. jbird

    jbird Member

    Messages:
    974
    Joined:
    Mar 12, 2003
    Location:
    Sacramento, Ca.
    Some of the dealers have descent descriptions of the different "brands" of a certain tube type, many a recommendation is so subjective. I'm in the same boat as we speak!
     
  3. Roccaforte Amps

    Roccaforte Amps Member

    Messages:
    6,120
    Joined:
    May 23, 2002




    I don't like any of the modern 6550 branded KT88's.
    None of them test, or perform anywhere close to
    the originals. They don'ty last very long.
    If your amp isn't running KT88 voltages and can accept
    6550's, hunt down some NOS GE 6550's.
    They'll hold up and sound the best. DR
     
  4. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    Thanks...

    I bought a pair of Gold Lion and JJ KT88s from Doug's today.



    with the old KT88's the Plate Voltage measured 597VDC and 583VDC. Open circuit it measures 625VDC.

    is this too high for a 6550?
     
  5. jbird

    jbird Member

    Messages:
    974
    Joined:
    Mar 12, 2003
    Location:
    Sacramento, Ca.
    I'm not too savvy on the subject, but I thought the KT88 & 6550 were interchangeable? Why then the plate voltage concern if they're of the same type?
    Also, if you would'nt mind a review of the Gold Lions vs. the JJ's!:AOK
     
  6. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    will do on the review.
     
  7. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    I loaded a pair of 6550, set the bias and all is good.
     
  8. Steve Snider

    Steve Snider Member

    Messages:
    6,106
    Joined:
    Jan 8, 2002
    Location:
    Salinas CA
    Genalex gold lion reissues!
     
  9. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    thanks... I've ordered a set... the 6550s are a stop gap
     
  10. whoismarykelly

    whoismarykelly Oh look! This is a thing I can change!

    Messages:
    7,430
    Joined:
    Aug 30, 2006
    Location:
    Baltimore
    Aren't the Genelex GL reissues about $150 a pair?
     
  11. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    I think they were about $110
     
  12. Steve Snider

    Steve Snider Member

    Messages:
    6,106
    Joined:
    Jan 8, 2002
    Location:
    Salinas CA

    From what I am told by several guys, these test like the old ones and have held up to extreme beatings by me. I love the way they sound when you crank the beast up and you gan bias these up around 50 ma+ no problem. Makes a difference.
     
  13. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    you're running yours at 50ma
     
  14. Steve Snider

    Steve Snider Member

    Messages:
    6,106
    Joined:
    Jan 8, 2002
    Location:
    Salinas CA
    I think mine are at 48ma. The safe range would be 45-55ma I believe. THe amp with the tubes I have in it is an absolute joy to play and at this point I would not change a thing.
     
  15. whoismarykelly

    whoismarykelly Oh look! This is a thing I can change!

    Messages:
    7,430
    Joined:
    Aug 30, 2006
    Location:
    Baltimore
    What comes stock in the 90? Are the Genelex a big difference? What do they change.
     
  16. Steve Snider

    Steve Snider Member

    Messages:
    6,106
    Joined:
    Jan 8, 2002
    Location:
    Salinas CA
    I believe chinese. Not bad by any means. The Genelex just sound a bit smoother and hold together better. The tone is improved .
     
  17. whoismarykelly

    whoismarykelly Oh look! This is a thing I can change!

    Messages:
    7,430
    Joined:
    Aug 30, 2006
    Location:
    Baltimore
    Interesting. Ill have to see how brash and angry it sounds on monday and go from there.
     
  18. sled

    sled Member

    Messages:
    732
    Joined:
    Aug 14, 2005
    Location:
    Clemson
    it'll be interesting to hear the difference between the Svetlana 6550 that's installed now and the Genelex KT88
     
  19. jockman

    jockman Member

    Messages:
    337
    Joined:
    Oct 17, 2004
    Location:
    East Sussex UK
    My amp, Carlsbro 50Top combo, is at the tech getting properly set up for KT88's, it was an EL34 amp.
    So far I have tried Chinese 6550's, they were nice, quite a warm sound and they had that lovely 'glass' sound, I then read that the new EH-KT88 was getting great reviews, so I have a pair, my opinion is that they are very much more treble, even sterile sounding, BUT, that was before proper set-up, I then read that the NEW Svetlanas were good, so, gullible me, bought a pair, and yes, they are a lot warmer than the EH and smoother than the 6550's, again, the amp was still not set-up. I would really like to believe the 'hype' about the new Genalex, but, it's becoming expensive, and the Genalex are at the top of the new KT88 price range. JJ's also get a good review, but as usual, it's all down to your ears...

    Jon
     

Share This Page