This is due to the unused cathodes floating, as they are not supplied with a voltage that ensures that they are turned off - use biasing resistors and they will turn off.
Have a look at this thread: http://www.vintage-radio.net/forum/showthread.php?t=82934 where there is a nice circuit diagram at the beginning, click on the small thumbnail, and you will see a proper biasing network for the cathodes. This is a circuit for a small motorized clock. /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/06b7a408-e0af-4e51-8c73-e41228a5fd1b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
