You can hold them close to a plasma ball and they will ignite if there is neon in them (or other gases in them too), just hold them with your hand and let them touch the glass of the plasma ball. If you compare the glow of a known working tube and one that you think is leaky you will hopefully see any differences in how they glow.
/Martin On Wednesday, 19 February 2014 17:44:10 UTC+1, Fred wrote: > Hi. > > I got lucky in finding 8 "NOS" B-5971. I tested them, 4 are perfect, but > the other 4 don't show any sign of life. I have been using 170V (up to > 180V) and a 10k resistor. Since I don't want to damage these rare tubes, I > wonder if I should try some higher voltage/current, to see if the 4 dead > tubes are doing better. > > If they out-gased, is there a method to detect this ? (I mean some method > to ionize the neon) > > I may not be interested in keeping these tubes, so if folks are > interested, let me know. I may trade them too (looking for ZM1040) > > -Fred > > -- 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/e6bff575-43ef-4f14-ab7f-86aba0e1c71e%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
