Quote Originally Posted by pythagoras
The tube sings Sounds like you have tuning forks int the base, the expansion rates even if they where only a few millimeters long and relatively thin would make them vibrate, so I'm thinking lots of thin pins??

Regards

John.
The hissing happens between -165c and -190c. Even with the dothan, if I let the container go dry for abit and then hit it with some ln2, it hisses like mad. Louder than anything I have ever used for ln2, it's pretty wild. I can keep my temps at any temperature I want from 0c to -190c with ease.
I am almost done testing the design's effectiveness, and I will show it soon. I am confident now that this thing flat out rocks with ln2 for controlling temps, as it was intended and it does equally as well with DI too.