[neonixie-l] Re: Custom text discharge tube
On 10 Mar, 22:08, Imajeenyus lind...@imajeenyus.com wrote: Hi folks, Just joined the group, after meaning to for ages! I caught the Nixie bug last year ... Hi Lindsay, Welcome - and a very nice site you have too. I was wondering if you'd seen http://translate.google.co.uk/translate?hl=ensl=fru=http://paillard.claude.free.fr/ei=Oel5TZezKpGKhQe98rjeBgsa=Xoi=translatect=resultresnum=1ved=0CB4Q7gEwAAprev=/search%3Fq%3DF2FO%26hl%3Den%26safe%3Doff%26prmd%3Divns ? Main interesting bit there is the making of his own triode from scratch, and specifically the degassing etc. which is necessary for a quality tube - obviously he doesn't Hg-dope his tubes (not necessary for him) but for any long-life discharge tube, some sort of anti- sputtering is necessary. Great work! Nick -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: Custom text discharge tube
Thanks! Not entirely sure about the lifetime - I suspect it's something to do with the large cathode area I've got (as a result of the way I made the cathode form steel sheet rather than wire). I guess the lifetime could be improved a lot by using neon (smaller atom mass, hence less sputtering) but I'd need to get hold of some first ;-) -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: Custom text discharge tube
Hi, Thanks for all the comments! Will - Not entirely sure about the lifetime - I suspect it's something to do with the large cathode area I've got (as a result of the way I made the cathode form steel sheet rather than wire). I guess the lifetime could be improved a lot by using neon (smaller atom mass, hence less sputtering) but I'd need to get hold of some first ;-) Marcin/John - I've sent you a pm regarding the tubes Yes, I saw Claude Paillard's video a while back and it was truly inspiring! The induction heating bakeout is probably essential for high-vacuum tubes (triodes etc) - I don't know about higher-pressure tubes like cold cathode devices. I was hoping that it wouldn't be so critical. That's a good point about the gas pressure - bit counter intuitive! You'd think that lower pressure would be better because you've got fewer atoms hitting the surface, but of course they'd be striking at higher energies. A nixie book did say that it is best to use the highest pressure possible, to avoid sputtering (it also gives you a good reservoir of gas). Trouble is, you often need to lower the pressure in order to get a uniform cathode glow at a reasonable tube current. Mercury seems to have a huge impact on lifetime as well - Bylander's book Electronic Displays has a graph of lifetime with and without mercury, and mercury addition is something like 20 times better. But I'd rather not be messing around with mercury! Cheers, Lindsay -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: Custom text discharge tube
Hi John, Thanks for the interest in a tube! It takes me a couple of days to make it and test it in operation, so I'd be looking at around £200, which would include postage to anywhere. If you're interested, let me know what letters you'd like displayed, and I can send you back a design of what the cathode would look like, to see if it's ok. Thanks again! Lindsay -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: Custom text discharge tube
That's pretty cool! What accounts for the 150 hour lifetime? On Mar 10, 4:08 pm, Imajeenyus lind...@imajeenyus.com wrote: Hi folks, Just joined the group, after meaning to for ages! I caught the Nixie bug last year and have been fascinated with them ever since, although I'm more interested in the actual construction of the tubes (also love Panaplex displays). The only thing I've actually built* with* a Nixie was a little 0-9 counter (linkhttp://www.imajeenyus.com/electronics/20100607_nixie/index.shtml) ;-) Since then, I've done a couple of Panaplex-like displays (firsthttp://www.imajeenyus.com/vacuum/20100814_panaplex/index.shtml, secondhttp://www.imajeenyus.com/vacuum/20101115_second_panaplex/index.shtml ), and more recently a text discharge tubehttp://www.imajeenyus.com/vacuum/20110310_text_discharge_tube/index.s..., which I though you might be interested in. I'm trying to find out if there's any interest in a custom tube like this with your name or whatever spelled out in it. They're argon-filled and have a lifetime of about 150 hours. If anyone would like getting a custom one made, just drop me an email. All the best, Lindsay -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
