I cant tell from the picture if the 3 & 4 digits are illuminated at the same time, or if it's something else such as leakage. You mention problems with '3' and '4', but are all other digits OK ?
The driver you use has a Vceo rating around 50 volts, which is susceptible to leakage if your anode voltage is significantly higher than the sustaining voltage of the tube. Whether or not this is the actual problem will require some debugging. Is it possible to modify your software so the digits are fully extinguished for a few milliseconds before the next digit is energized ? This should be pretty easy to do if your display is multiplexed. That will provide a few clues about the problem. Also, as you know, nixie tubes have their cathodes "stacked", and the order is not necessarily numerical. I'm willing to guess the '3' cathode is closest to the anode, and the '4' is right behind the 3. Burroughs 5031/5092/6091 tubes are constructed that way (Oh, there I go again about Burroughs tubes.....) -- 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/875e52e9-5819-40b8-9c14-eceb397fefd7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
