> I have 8 old IN-18's that have seen better days. When inserted into one of Mr > Nixie(UK)'s excellent Cyclox 3 time pieces using it as a testbed, in daytime > bright mode most of the cathodes light, but some have slight dark areas in > the middle of the digits. When in night/dim mode this problem becomes more > pronounced with only small lengths of some of the digts lighting up at all. > Do you think this is 'cathode poisoning' (wot I have heard of) or just > gradual deteriation caused by contamination of the gas ?
Yeah, sounds like either cathode poisoning or running them with insufficient current. I'd measure the current (or voltage drop across the anode resistor, and calculate the current). Measure the anode resistor too (with the power off!), if it has changed value, that could be the problem. > Any ideas how to save them ? Usual approach is to run them at higher current for a while (hours to days), especially the most-affected digits. - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
