I had a similar massive darkening on a IN-14 tube some years ago. Repalced tube and it have working good since then. I supposed air have come inside tube.
Sture 2016-03-26 8:29 GMT+01:00 franetic <frane...@gmail.com>: > 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 neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/466d88be-3113-4c6b-9548-7708592771d8%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/466d88be-3113-4c6b-9548-7708592771d8%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALOqkRz3b0wVZR4-5hB%3DMk4Z%3DUG08CkTqySWUKhu4HJzwpp6zg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
