The Future of Hifi is just being Discovered

barts,

Never get vacuum tubes cryogenically treated, its a scam and not healthy for the tube life.

People do not understand that a tube has multiple parts of different materials that expand and contract at different rates. This causes stresses in the tube when you try to freeze it at cryo levels. One of the biggest failure points is the tube pins where they pass through the glass envelope. Another is the plates where they join to other types of metals. 

It is not safe to cryo vacuum tubes ever and your just adding to failure points if you do. 

Cryo Tube Controversy - The Chilling Truth - thetubestore Blog

Cryogenic Treatment of Tubes: An Engineer’s Perspective - Effectrode

Something different,

I suspect that electronic engineers don’t get any courses in Materials Science, Engineering Science and Strength of Materials as do some others in the field.

All materials would benefit from cryo treatment if done right.

I would not care for NOS cryo treated tubes but i would for cables, plugs, fuses and so on.

Just saying.

Did you read the comments @glennewdick ?  ... Funny, but predictable.

No they don't @petg60 , but some of us are not engineers, but material scientists. No not all materials would benefit from cryo treatment whether done right or wrong. Especially an assembly of multiple metals may not, it could quite possible destroy delicate surface features from temperature change shear of metals with different expansion expansion coefficients.

Of course, we are talking electrical properties as well, not mechanical properties. Precise alignments, diffusions, vacuums, etc. any number of things could be negatively impacted and when you are talking about the basic conductivity of a metal, small differences will be inconsequential no matter what.

deludedaudiophile

440 posts

07-11-2022 at 10:13am

Did you read the comments @glennewdick ? ... Funny, but predictable.

I read most and I was not referring to the article that I did not read fully. I was referring to someone talking about cyro treating vacuum tubes. I was adding some references for that statement.

Not the same as electrons flowing at cryogenic temps.

Please be more specific as i do not get your sarcasm.