Put a new battery in your calculator: 1V/0.05A = 20 ohms Don't feel too embarrassed. If you look at the old Yahoo nixie forum, I have a long trail of on-line oops's.
Your hot resistance measurement procedure is correct, and that's what's really important. On Sunday, December 8, 2013 10:14:55 AM UTC-8, Mark Moulding wrote: > > > I then set my bench supply to 1.00 VDC, and connected it directly to the > filament. The power supply's current meter read 0.05 A, or 50 mA - right > at spec, but not with very good resolution, so I then put a milliamp meter > in series. I've previously measured the internal resistance of this meter, > and know it to be 0.1 ohm, so it wouldn't significantly affect the > reading. Sure enough, it read 51.2 mA, which is *plenty* close enough for > any practical use. Therefore, the hot filament resistance is just about > 200 ohms. > > ~~ > Mark > > -- 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/05cdb41f-9f59-4135-b956-64c3aa09af5a%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
