Hi Michael, the numbers for nixi tubes is one of the problem I havent sufficiently solved yet. Are your laser cutters able to produce numbers that have 0.4mm wide lines? The material would be 0.1mm thick stainless steel sheet (316L).
I could send You some sheets to give it a try, just send me your address ;-) Thank You! Dalibor 2013/1/27 michael gregg <mgregggph...@gmail.com> > Sounds good. And yes, other people that have made nixie tubes do seem > to be getting good results with the level of vacuum that you are > getting. > > Also, I have all sorts of crazy laser cutters here. I may be able to > come up with a good stack of numbers or other characters if you'd like > them for your nixie tubes. I have never cut anything so fine with > these lasers, but according to the manufacturer, I should be able to > do it. > > I am not sure where I would get tiny ceramic separators though. > > I am excited to see your results. > > Michael- > > > On Sat, Jan 26, 2013 at 6:14 AM, jb-electronics > <webmas...@jb-electronics.de> wrote: > > Hi Michael, > > > > yes, I will document everything on my website. In fact, most of it is > > already done, but right now I am writing the vacuum system part and I > want > > to document all the steps that I did until now. And now it is far from > > perfect. So I will show all different setups and number them. My current > > setup is setup number III. > > > > It won't be long ;-) > > > > Jens > > > > > >> On 01/25/2013 03:52 PM, jb-electronics wrote: > >>> > >>> Hi folks, > >>> > >>> I am still working on Nixie tubes, but I have to take it a little slow > >>> at the moment because I switched my university and I am currently sort > >>> of living in two cities ;-) > >>> > >>> However, today I had some time so I took a look at my vacuum system. > >>> My problem was that even after I closed the valve to my pump at a > >>> pressure of 1.5E-2 mbar, the pressure would rise up to 20mbar in 20 > >>> minutes. So there was a leak. > >>> > >>> I then checked every part of my system (swagelok adapter, needle > >>> valve) by replacing them with a blind flange and recording the > >>> pressure after 10s, 20s, 30s, 40s, 50s, 60s, 120s, 300s, 600s, 1200s > >>> and plotted them. I realised that there was insufficient greasing on > >>> my needle valve, and the most interesting thing is that it is not > >>> airtight if the scale is adjusted to just zero. You have to (gently) > >>> adjust it below the scale zero point. Then I get a leakage rate of > >>> just 1.2 琨ar/s which is very low. > >>> > >>> My system has a volume of at most (!) 65ml, so the leakage rate now is > >>> Q = 5.4E-6 mbar l/s which is pretty good I think. See my results here: > >>> > >>> http://www.jb-electronics.de/tmp/leakage.png > >>> http://www.jb-electronics.de/tmp/leakage_extensive.png > >>> > >>> Note that the Q value in these diagrams needs to be multiplied with > 65ml. > >>> > >>> The next step will be to find a good connection to the pressure > >>> reducer for my gas bottle. Right now I am using a PVC hose (terrible), > >>> and I have huge leakage rates. > >>> > >>> But as always: One thing at a time ;-) > >>> > >>> Jens > >>> > >> Very cool. > >> > >> So the leakage rate seems pretty low, but I'd be concerned about the > >> total vacuum that your system can accomplish. > >> > >> Although I have never built nixie tubes myself, I did a good amount of > >> research to go down that road. > >> > >> My research came up with some claims that you need to get down in the > >> 10E-6 torr before the fill for good results with a nixie tube. > >> > >> Anyhow, please keep a image journal of your work. It looks like a great > >> deal of fun. > >> > >> Michael- > >> > > > > -- > > 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. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to neonixie-l@googlegroups.com. > To unsubscribe from this group, send email to > neonixie-l+unsubscr...@googlegroups.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. For more options, visit https://groups.google.com/groups/opt_out.
