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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: most intresting tube posted by PakProtector on July 24, 2017 at 18:22:16:
"Now with octal tube sockets, an octal is an octal, so consider the insulating material. The vacuum level in all of these is high, and absolutely independent of outside pressure. Not sure how far you'd have to go to find a harder vacuum than what is inside...:)"
Indeed, but its what's going on outside, not inside, the tube that matters. A quick googling of Paschen's law and related articles suggests that at 50,000ft, where air pressure is maybe about 12% of sea level, the voltage needed to cause an arcing breakdown across a given air gap is roughly one tenth of what it is at sea level. Maybe that could be quite significant, and might perhaps might impact how the tube and the base is designed.
Chris
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- RE: most intresting tube - cpotl 01:40:04 07/25/17 (0)
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