There was another thread about the IN-18 in a Spectrum clock where the wall wart was not outputting sufficient power and replacing it with a 2A supply took care of a persistent poisoning problem. Running a nixie with insufficient drive will definitely poison all of the cathodes because when they run at spec, the cathodes are able to drive off deposits as part of normal operation. Driving the IN-18 at 6 mA is not unreasonable. Try changing your wall wart supply first and do the anode resistors second. If changing the supply shows ANY difference in brightness, then you may have solved the problem. I have a couple Spectrum clocks with IN-18 and have 3 years on the oldest clock with no tube issues. Jeff -------- Original message --------From: Paul Andrews <[email protected]> Date: 10/3/17 1:28 PM (GMT-06:00) To: neonixie-l <[email protected]> Subject: [neonixie-l] Re: all my Nixie tubes are dying :( Make sure your wall wart is pumping out a steady voltage close to that required - you would need an oscilloscope. I have heard that this can be a problem for these clocks.
I’m also not a big fan of running tubes near the bottom range of their current specs. It seems to lead to more cathode poisoning. There are various threads where this has been discussed in great detail - with evidence. Apologies if this all sounds like hearsay, but it is based on the conclusions of similar threads. -- 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/7244521f-6f56-40c3-942a-91dd71147d4e%40googlegroups.com. 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 [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/59d3e14b.4e5f240a.36b18.39af%40mx.google.com. For more options, visit https://groups.google.com/d/optout.
