If you have a capacitance meter, you can compare capacitance readings on this pin vs the same on good tubes. If the values differ significantly, it suggests the break is closer towards the pin.
I suspect it's somewhere with the connections to/from the internal 'circuit board'. Tapping the tube is risky because it could cause segments to short against eachother (I have a tube like this). I also have a tube with a dead segment, and nothing is obviously wrong from a visual inspection. Gentle tapping did not help, and cranking the voltage way up did not produce any glow. Since other segments are good, this failure is not a gas-leak. It's unlikely to be cathode poisoning, either. It's still a very useful tube so take care of it. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/78fd0484-db20-4295-870d-8ee137a717c1%40googlegroups.com.
