Are cryo'd tubes always better?

Cryo improves the performance of almost all materials, glass, plastics, metal, etc.. However, I think it wise to wait at least a few days, maybe as long as a week, before listening critically to allow the cryo'd material to recover from thermal shock.

Actually, cryogenically treating materials improves their strength, hardness,
durability and stiffness, making them less brittle. The improvement to the
material is due to the atomic structure becoming more homogeneous,
especially for metals that have pressed, bent, drawn or hammered. Thus,
cryo 'd tools last longer, cryo'd golf clubs hit the ball farther, cryo'd brass
musical instruments ring less and sound better, cryo'd Ferarri piston rods
last longer, and the valves on cryo'd trumpets move more smoothly. Put
succinctly, cryoing is cold tempering. Heat tempering obviously also
improves the strength and hardness of metals.

Cheers

Rok2id, what are you, like in fourth grade?

(Just kidding)

Albert Porter,

Regarding cryo'd tubes, I am reposting my earlier comments on this thread here, you know, just in case.

"Cryoing improves the performance of almost all materials, glass, plastics, metal, etc.. However, I think it wise to wait at least a few days, maybe as long as a week, before listening critically to allow the cryo'd material to recover from thermal shock."

Cheers

Albert Porter wrote,

"The worst result from cryo came with treating tightly wound
transformers, both large (amps or speakers) and tiny (MC Cartridges). After
ruining several pieces we concluded that the transformer had no room to
"compact itself" when shrinkage occurred at super low
temperature. This caused fractures to the wire and even after lengthy break
in times the damage seemed to be irreversible."

That's odd. Plenty of transformers and MC cartridges have been cryo'd
over the last 15 years without failures. Besides, copper is a ductile metal
and should not fracture, even under this sort of duress. Were you able to
observe fractures in the wire? Just curious.

Br3098 wrote,

"3- As an extreme oversimplification, cryogenic treating can result in
physical properties such as improved tensile strength and improved grain
edge boundaries that facilitate tighter machining tolerances. But show me
one study that demonstrates how cryo-treating improves conductivity or
electron flow in off-the-shelf steel parts. It doesn't."

I cannot show you even one study because nobody has studied it.
He-looo! Can you show me one study that demonstrates that cryo-
treating DOESN'T improve conductivity or electron flow in metals?

At least you seem to be coming around a little bit by acknowledging that
metals are not made more brittle by the cryo process as you earlier opined.

Br3098 also wrote,

"But again, if it works for you then it works (for you)."

Yes, it does work for me. Obviously it doesn't work for
those who never try it. Lol

Br3098 wrote,

"You only cited a small part of my response. You be an operative for one of the major political parties."

Actually, I'm an independent.

Br3098 also wrote,

"As a matter of fact I have purchased cryo'd tubes and cables. Other than the KT88s that died a premature death I could tell no difference, either by ear or by measurement."

That's very interesting. I can certainly understand why you couldn't hear a difference but, praytell, what did you measure?