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RE: What ever happened to cryo treated tubes?

Thanks unclestu for the info! I really appreciate the input and actually discussing the matter. I find there isn't enough info from a single source that completely covers the intricacies of the process. I feel there's just a lot of "up in the air" info one has to take for granted. Or you have to ask a dozen gurus to be certain. And even then, again, what's a cold bath for an already cherry-picked tube?

I can see why a tube would not suffer damage. I was aware the materials were selected for their expansion rates, but I just didn't know if it applied to both hot and cold extremes and whether it all followed linearly. And thanks for telling be about how the grids are assembled. I thought they were more delicately installed than that.

As for the spare gasses infusing themselves into the tube's materials, I guess it's possible. But wouldn't operating tubes for a time excite any of those gasses, leaving the getter to do its work? I wish I knew more about metallurgy hahahaha

And for the solder bit, that's what I meant (pins and bases on power tubes). Ya, everything else is a weld. :P


JoeKool - Do you have any A/B comparison experience you can share?

And geoffkait, ya, the physical consequences seem to be nil (at least perhaps for most tubes). However, the jury's still out on whether it does anything beyond that. Share your experiences with your 6SN7GT's you get the chance!
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May your tubes be lively, warm, and long-lasting. Holy be thy heater.

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