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Cryo Valves anyone?

Discussion in 'Glowing Bottle Tube Amp Forum' started by PeterVV, Jan 23, 2014.

  1. BiggerJohn

    BiggerJohn Friend of Leo's

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    Marketing nonsense. Dont waste tour money on snake oil.
     
  2. dlmorley

    dlmorley TDPRI Member

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    I bought an amp and it came with a load of spare valves. In amongst the 12ax7 valves was a Harma Diamond. I have a THD Univalve and it's the valve I preferred in V1 out of 5 others (JJ/Ruby/and some other I forget) The only one I liked as much was a Phillips but it had a different character, so I swap between them.
    No idea why, just how it is for me.
    In any case, it's a very good valve.
     
  3. Walter Broes

    Walter Broes Tele-Afflicted

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    I have a pair of small bottle philips 6L6's in my Victoria Victorilux, and they're the cryo ones from Watford Valves.
    The amp sounds absolutely killer, but I'm 99.9% that has nothing to do with the cryo process. :)

    To Watford valves credit though, my tech remarked that the tubes were exceptionaly well-matched.
     
  4. teleamp

    teleamp Poster Extraordinaire

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    Real cold snake oil...
     
  5. Wally

    Wally Telefied Ad Free Member

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    Walter, if you had a set of NOS tubes just like except that they had not been cryogenically tested, you would have the perfect equipment with which to do a blind A/B test....bused to identical plate dissipation figures for both sets of tubes.
    Doesn't that.1% of doubt bother you???! (;^)
    I have no doubt that there is some effect that the cryogenic treatment has on the metal, but I am in the camp with the skeptics.
     
  6. Bill Hicklin

    Bill Hicklin TDPRI Member

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    Is there any hypothetical mechanism by which cryo would alter the electrical as opposed to the structural properties of metal?
     
  7. mherrcat

    mherrcat Tele-Holic

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    How would you even know the tubes had been cryogenically treated other than someone telling you they were and charging you more money for them?
     
  8. 6942

    6942 Poster Extraordinaire

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    I prefer mixed drinks cryo-treated.
    At least I know what I'm getting?
     
  9. overlock

    overlock Tele-Afflicted

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    Well, you'd hear the difference, obviously!
     
  10. orangedrop

    orangedrop Friend of Leo's

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    Other than paying for expensive spectral analysis of the metal in a tube, you buy from a reputable dealer, but I'm not sure how cryo treatment helps improve a tube's performance.

    Have a read if you are so inclined...

    https://www.tubedepot.com/pages/black-sable-faq (ooohh! Can I use these in a guitar amp? NO. lol)


    http://www.effectrode.com/cryogenic-treatment-tubes-engineers-perspective/
     
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