> How does a nixie behave in the first few hundred micro seconds after > switching off. Is it resistive, capacitive or inductive? I would > assume it to be capacitive but that is not exactly what I measure.
That's a really good question, and I'll admit I haven't attempted to measure it. So, in the grand tradition, I'll take a guess at it. Said guess is that the plasma stays ionized for a bit before the atoms settle back down to ground state, so it would have the electrical properties of an ionized plasma, which would be: negative resistance. This would decay to capacitance as the gas became nonconductive. there's of course inductance from the leads, and the capacitance and inductance are distributed (especially in larger nixies), making a sort of sloppy transmission line with varying characteristics. Now I want to see if various nixies have resonant frequencies, and what I'd get back if I hooked a TDR to a really big one. > It > seems more resistive, so I am wondering if this is normal or am I > doing something wrong? I'm curious as to how you're measuring this in the first place. Are you using pulses with a trailing voltage and a series resistance, or what? - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
