I haven't run them yet on elevated currents, I'll give that a try later on. At the moment it is easier to just replace the tube and give it a mark.
I also have 1 tube that shows another interesting phenomena. I can light up the decimal point with any digit except number 1. The decimal point fades to almost invisible when I light digit 1, while with all others it shows just fine. I find it particularly strange because digit 1 is I think the furthest digit away from the decimal point. Michel On Dec 9, 5:56 am, Quixotic Nixotic <nixci...@jsdesign.co.uk> wrote: > On 8 Dec 2012, at 15:58, threeneurons wrote: > > > "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 for a few hours, or so, at elevated current ? This usually cures the > > problem. But not always. > > I have today run a pair of new Burroughs B5092 round top view jobbies and > they both had cathodes that refused to light. In one or two cases the legs > would glow instead of the digit. A couple of digits looked plain dead. After > poking about lighting various digits they have all woken up and started to > fire normally, which is a relief. Trying to fire them later they were again > sluggish for the first few attempts to light. I am sure they will start > behaving better once they are run in. > > John S -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
