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Discussion in 'Glowing Bottle Tube Amp Forum' started by PeterVV, Jan 23, 2014.
Marketing nonsense. Dont waste tour money on snake oil.
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.
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.
Real cold snake oil...
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.
Is there any hypothetical mechanism by which cryo would alter the electrical as opposed to the structural properties of metal?
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?
I prefer mixed drinks cryo-treated.
At least I know what I'm getting?
Well, you'd hear the difference, obviously!
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)