I don't think there would be any need to add helium, hydrogen, or even krypton-85 to *indicator* tubes.
The reason those gases were used in dekatrons or trigger tubes was to get more speed or reliable triggering, which of course is not needed at all in indicator tube. Also the mixture in voltage regulator or reference tubes sets up the sustaining voltage, but again, they are *not* intended for display, regardless of the use they are given sometimes nowadays. Most certainly all of the indicators use either pure neon or a simple Ne-Ar Penning mixture, with the "modern" addition of Hg to get extended life. Gastón On Sunday, June 8, 2014 5:06:38 PM UTC-3, Nick wrote: > > Has anyone got any PROOF that hydrogen or helium were added to these > tubes, or indeed any nixies. > > There are hydrogen filled dekatrons - i.e. special "fast" dekatrons, but > nixies? > > Tube types, datasheets? > > Nick > -- 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/028dbf39-590c-4380-be72-ce9786ac2330%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
