"Sleeping Sickness". A form of cathode poisoning, from not being powered
for some time. It appears that sitting idle for too long, effects the
surface of the metal cathodes. This effects the work function, and they
light up, unevenly. Its a problem for all cold cathode tubes. Did you run
them f
Interesting Martin, it seems to me that after manufacturing, these
nixie tubes did not undergo the same failure tests as modern
electronic parts. I find quite a few tubes that have a piece of one
cathode segment not lighting up. Is that because they're so old or has
that never been tested when they
