I have received cryo'd tubes that had 2 out of 6 cracked in shipment even though they had been wrapped in foam. My impression was that the metal/glass interface may be the weak point.
Cryogenic Treatment of Tubes, and why you should not.
Came across this paper while ago on cryo treating tubes and thought iI'd share it here. There is some other great information on tubes on the site as well.
Cryogenic Treatment of Tubes: An Engineer’s Perspective - Effectrode
Showing 2 responses by bolong
Machine Tool Cryogenic Treatment This doesn’t prove anything about audio tubes, but I wouldn’t argue with the proven physics demonstrated in these other applications (above link) I can certainly see why the more adventurous tube dealers would experiment with cryo. It may be an experiment paid for by the buyers, but the buyers are willing to be experimented with. It's an understandable urge. Some particular resolution of the question may one day rule, and it may have been hinted at by the machine tool manufacturers' experience. |