I'm running the filaments in series but even then the first one is brightest and the subsequent ones a little dimmer one after the other. I don't think that's an ac/dc problem though (or could it be?). I need to think a little more about the circuit.
Thanks for the transformer tip, I'll go down that route. On Fri, 13 Sep 2019, 23:26 gregebert, <gregeb...@hotmail.com> wrote: > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/9d290194-83e8-4eed-a5d3-03e114bf80b2%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/9d290194-83e8-4eed-a5d3-03e114bf80b2%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALY4pG2L84aAr8QMB-1E-OgCBydefy34dSwh6LDMUvGKBHdv-g%40mail.gmail.com.
