The tube singsSounds 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 tube sings
Regards
John.
"Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two points. The third time you go through it, you know you don't understand it, but by that time you are so used to that subject, it doesn't bother you anymore".
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