You might already have tried the ideas below, or already know about them but I mention them anyway as I have come across those faults.
You should make sure that you load the driver properly, otherwise it might not show its fault as small leakage currents will be present and show you the wrong voltage levels. If possible you should disconnect the two Nixies, you can do this by unsoldering the end of the anode resistor closest to the nixies and hook up a known good nixie to the anode resistor, wiring one of the cathodes to the same cathode on the nixies. This way you will know that you have a known good nixie there and if it still fails it must be some component in the driver chain, all the way back to the controller driving the NPN transistor. You can also unsolder the resistor driving the base of the NPN transistor, the end closest to the controller and then hook it up to any of the other anode drivers, if the driver works then it is the controller. /Martin -- 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/293abc3a-5fb9-4fb1-a2e0-28cd33b6cd2c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
