> I've noticed black residue collecting on the inside of at least one of my > nixie tubes over the past 1-2 years. What's interesting is that it is > collecting right where the glass of the tube is touching the glass cover of > my case (yes, I goofed on the case; nothing should touch the tubes...). It's > a small dot, perhaps 1 mm in diameter so it doesn't bother me much.
That may not be sputtering, but mercury condensation. The mercury will tend to condense on the coolest part of the tube, so if it's warm in your enclosure, the contact with the case might provide that cool spot. Close examination with a magnifier might reveal telltale tiny beads of mercury there. - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/B46E2A39-571F-4F6E-9977-FFFDF22DE863%40mac.com. For more options, visit https://groups.google.com/d/optout.
