Cryogenically treated valves

[thrudge]

Has anyone used these? Did you find them better than untreated ones?

 

[esk]

Yes. just got some driver valves for my ART Carissa. Now it could be they are just better than the stock valves but they were a real improvement.

Removed some of the bass bloom that was in my system and sharpened up the focus.

I'd certainly not go back. They came from Watford Valves.

 

[magoo]

Yes, I have a Unison Research S6 & rolled the supplied sovtek el34's for cryo Svetlana version, and it was an absolute revelation! Every aspect of performance was improved, from the bass right up into the "air & space" department. TBH, as soon as I can afford it, I'll be sending my cables off to be treated too.
Valves came from http://www.tube-shop.com/cryodetail.asp?prid=Cryo-Svet-EL34 (Pair).

All the best

 

[alexs2]

There's a longish thread over on the WAD forum relating to this,and many of us think that there isn't a significant difference between the cryo tubes,and decent NOS tubes,but that there is a HUGE difference between these,selected and/or very good stock tubes,and the bulk of the cheap manufacturer supplied stuff.

I've had cryo treated output tubes on the Tube Technology monoblocs I owned,which were good,no doubt,but no better than many.
I tend to use NOS input/driver tubes(Mullards and Telefunkens) and NOS outputs where practical,although a good number of the current tubes such as 300Bs,KT66 replicas etc are actually very close to the originals,and crtainly things like the TJ Meshplate 300Bs are superb,as are the retro-shaped KT66s.