A quick update to draw a line under this topic: since the last post some time ago, I've had no more failures, even on the non-multiplexed clocks. Here are my observations:
In general, IN-1 *are* more sensitive to misuse, and will bridge over between digits (1 and 6, 4 and 8) if not driven within their parameters. Presumably this is because of the lack of mercury doping, which also gives them their warm glow If run in multiplexed mode, there does not appear to be a large problem. You should still respect the current limits, but it is possible to moderately over-drive the tubes with no ill effects. My oldest multiplexed IN-1 clock is still looking great after a couple of years of continuous use and no special precautions. If run in direct mode, you have to be more careful with the current limit. I had repeated failures until I really measured the current and adjusted it to be in-spec (3mA). Even with direct drive I still pulse the current, but that is because my design easily allows for it, and I use ambient light dimming. IN-1s *do need more care* than other tubes, but if you are careful with the current or use multiplexing, you should be OK. -- 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/b95d6cf3-3ab4-480d-ac95-a8f682061496%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
