I have seen this once on a ZM1042 where the anode screen had come loose from the pin at the back, it might be the same with your tube. If you can get it back you could check it to see if the same has happened to it.
/Martin On Saturday, 26 March 2016 08:29:14 UTC+1, franetic wrote: > > Hi all, > > can anybody (of more experienced builders) explain extreme darkening of a > (then new/unused) ZM1000 nixie tube in just 3 months? The failed nixie was > used in a clock in the minutes position. (The clock is a multiplexed 2x2 > design, 10mA peak current at 25% duty cycle - this hits the average 2.5mA > cathode current.) I've built a few of these clocks, and have never seen a > ZM1000 fail like this. (I also use that clock at home and another one at my > office, they have been running for years with a little silvering at the > bottom and only slightly noticeable darkening.) One thing that I noticed is > that the failed nixie has the anode grid cage quite a bit more out of place > than usual. Could this be the culprit? > > Thanks, > Damir > -- 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/2b428d51-52ae-474c-98a6-885047b4828e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
