The process is a bit crude, but worth watching nonetheless.
https://www.youtube.com/watch?v=Imsc_J25QmE
Hand Crafting Vacuum Tubes
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Hand Crafting Vacuum Tubes
"Any sufficiently advanced technology is indistinguishable from magic."
-Arthur C. Clarke
"It is difficult to get a man to understand something when his salary depends upon his not understanding it."
-Upton Sinclair
-Arthur C. Clarke
"It is difficult to get a man to understand something when his salary depends upon his not understanding it."
-Upton Sinclair
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