Those are very cool-looking tubes !! Are you connecting filaments in-series ? If so, when you run them on DC there will n=be a net bias and that will cause non-uniform brightness Even if the filaments are in-parallel, there will be some DC bias that makes some segments dimmer.
A center-tapped AC filament transformer with the center tap tied to circuit GND should work nicely. If you need dropping resistors, be sure to put equal-valued on each side of the transformer. Dont use a single resistor because it will produce an offset that affects brightness. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9d290194-83e8-4eed-a5d3-03e114bf80b2%40googlegroups.com.
