Nick, thank you for the swift reply. I've scanned in p340, here <http://s23.postimg.org/t1sp4km0b/page196.jpg>. The book is the exact one in the reference.
On this page Weston explains the impact of digit cycling on lifespan. The point of a gradual rather than abrupt end of life is also made. However I was not able to find the aforementioned 50% threshold. I also checked p240 and p140. Could it be that it is somewhere else in this chapter? I am conscious this would appear as pedantic, but the quoted end of life due to loss of luminosity comes down to this important threshold. Dalibor, certainly. The work revolves around single-cathode tubes, but the theory and experimental setup are directly applicable to any indicator tube, handmade or not. We should discuss more. Regards, Alex On Wednesday, October 2, 2013 2:48:05 PM UTC+1, Dalibor wrote: > > Hi Alex, > > I hope You will share results of your experiments! ;-) > > Thanks, > > Dalibor > > 2013/10/2 AlexTsekenis <alexts...@gmail.com <javascript:>>: > > Hi Nick, > > > > I am doing some experimental work on the subject of lifespan due to > > sputtering. > > > > Could you provide the full reference, including if possible a chapter or > > page number, for Weston's 50% threshold please? You mentioned it in your > > first post. > > Thanks in advance. > > > > Regards, > > Alex > > > > > > On Tuesday, October 1, 2013 4:04:26 PM UTC+1, Nick wrote: > >> > >> The lifespan of a nixie is not a precise science - end of life may be > >> considered as when luminosity drops by 50% (Weston), sputtering > destroys a > >> cathode, cathode poisoning renders a glyph unreadable (though this may > be > >> reversible), mechanical damage etc. > >> > >> I was wondering about the luminosity and sputtering issue. In my > >> experience, nixies rarely run at over 35 - 40C unless heavily > over-driven. > >> Would the introduction of a small amount of a halogen, probably > chlorine in > >> this case (maybe iodine?), allow a low-temperature halogen cycle to > >> re-deposit any evaporated cathode? I'm well aware that mercury (Hg) is > >> introduced for a similar reason, but a halogen may be safer (in today's > H&S > >> climate) if it works at all... > >> > >> I'm not a physical/inorganic chemist, so thoughts welcome.... > >> > >> 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+...@googlegroups.com <javascript:>. > > To post to this group, send an email to > > neoni...@googlegroups.com<javascript:>. > > > To view this discussion on the web, visit > > > https://groups.google.com/d/msgid/neonixie-l/384e33af-2754-4e97-a74a-b339a49d503c%40googlegroups.com. > > > > > > For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > Dalibor Farny > http://dalibor.farny.cz > -- 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/0709e115-face-4256-a473-89c26078c0cd%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
