Making a glass vacuum system (filling manifold) is quite easy with glassblowing torch and blowhose. I tried several T-joints and when I was satisfied with function (look could be better) I started to make a glass system. I am not decided how to connect it to vacuum pump, I realised, that silicone hoses (I use) outgasses to much..
Vermiculite is curious material, it is very light, it has almost no thermal capacity, it is good thermal insulant, so the cooling is very slow. The heat from the annealed glass is enough. Dalibor 2012/6/26 jb-electronics <[email protected]> > Hi, > > for easier maintenance and also due to my dissatisfactory glassworking > skills I will use a standard vacuum flange system. There is a very good > needle valve I used once in the university that I would love to have for my > setup. It allows you to let in the gas very (!) smoothly so almost any > pressure can be achieved given the vacuum system is not leaky. The bad part > is that this valve costs 200 EUR, which is much for a student (if you have > to pay rent and stuff...). But it is a one-time investment that will > definetely pay off. > > Interesting about the vermiculite, I did not know it was sufficient to > just put the glass in there, I thought some kind of active tempering was > still required. > > Jens > > Hi, for what do You need needle valve? And how much does that costs? I > use common glass high vacuum valves.. > > I am going to build an oven according to: > http://www.teralab.co.uk/Glass_Blowing/Annealing_Oven/Annealing_Oven_Page1.htm > > Now I use a box with vermiculite ($10), it works surprisingly well, if You > are patient enough to wait until it really cools down, nice result may be > obtained. But the real annealing is still better. Look here: > http://www.randombytes.org/lamps_old.html > > Dalibor > > 2012/6/26 jb-electronics <[email protected]> > >> Hi Dalibor, >> >> yes, that is my number 2 item on the wish list, the first one is the >> needle valve. >> >> What do you do for annealing? Have you built yourself an annealing oven? >> >> Jens >> >> I forgot, I bought small glassblowing torch, oxy-gas, it is huge >> difference compared to hardware torch. If You have some spare money, go for >> it.. You can set the flame to heat just a small area (5mm diameter) and >> so... >> >> Dalibor >> >> 2012/6/26 jb-electronics <[email protected]> >> >>> Hi, >>> >>> Do You have any info about your progress on your site? >>> >>> >>> I am currently training my glasswork "skills", which is really a lot of >>> work, so this eats up all my spare time at the moment. I will have more >>> time in the next months, so for me it will take some more time, sadly. >>> Hence, there is nothing to report for my website as of now :-( >>> >>> I have a plan, though, for a simple glow lamp with two cathodes that I >>> will be able to build with my primitive tools and especially primitive >>> burners. Let's see :-) >>> >>> Jens >>> >>> >>> >>> Dalibor >>> >>> 2012/6/26 jb-electronics <[email protected]> >>> >>>> Hi folks, >>>> >>>> the only tube with a flashed getter I know of is the XN-1: >>>> http://www.tube-tester.com/sites/nixie/data/XN1/XN1.htm >>>> >>>> To be honest: I will not use getters at the moment. There is so much >>>> glasswork to figure out for me, that is the part that I will focus on in >>>> the next months. :-) >>>> >>>> Jens >>>> >>>> Hi Dylan, >>>> >>>> flashed getters are not used in nixies (I havent seen it at least), >>>> just some VFD tube use flashed getters. Flashed getters leave a coating on >>>> a glass envelope of the tube - we don't want that. I think that kind of >>>> getter needs only initial activation by heat which could be done by >>>> induction heating as well as in the case of flashed getters. Look to IN-14 >>>> nixie, there is exactly the same pellet. >>>> >>>> The only matter to solve will be attaching the pellet to a wire, but I >>>> think that will be possible to do by spot welding - inspired by IN-14. >>>> >>>> Thanks, >>>> >>>> Dalibor >>>> >>>> 2012/6/26 dylan roelofs <[email protected]> >>>> >>>>> Hey Dalibor and others- >>>>> I don't feel that these are the right getters for nixie tubes. >>>>> The literature lists them as thermally active- they only absorb if >>>>> you put them somewhere hot. >>>>> Many styles of getters are made this way; most tubes do run quite >>>>> hot, beacuse of the filaments.. >>>>> >>>>> There isn't anywhere in a nixie tube that is constantly 100C-200C. >>>>> (That's part of the magic of nixies, of course) >>>>> >>>>> You really want some flashed barium getters; they absorb gasses at >>>>> any temperature. >>>>> >>>>> -Dylan >>>>> www.dylankehderoelofs.com >>>>> >>>>> >>>>> >>>>> >>>>> On Monday, June 25, 2012 11:21:36 AM UTC-7, Dalibor wrote: >>>>>> >>>>>> Hello guys, >>>>>> >>>>>> I've got an offer on getters, tech info attached.. the price is >>>>>> approx. 5pcs/1 eur. Is anyone interested in it? I will place an order in >>>>>> several weeks, I may send some pieces sealed in argon filled tube.. >>>>>> >>>>>> -- >>>>>> Dalibor Farny >>>>>> http://dalibor.farny.cz >>>>>> >>>>>> >>>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "neonixie-l" group. >>>>> To view this discussion on the web, visit >>>>> https://groups.google.com/d/msg/neonixie-l/-/VDpd_HcdKewJ. >>>>> >>>>> To post to this group, send an email to [email protected]. >>>>> To unsubscribe from this group, send email to >>>>> [email protected]. >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/neonixie-l?hl=en-GB. >>>>> >>>> >>>> >>>> >>>> -- >>>> Dalibor Farny >>>> http://dalibor.farny.cz >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "neonixie-l" group. >>>> To post to this group, send an email to [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]. >>>> For more options, visit this group at >>>> http://groups.google.com/group/neonixie-l?hl=en-GB. >>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "neonixie-l" group. >>>> To post to this group, send an email to [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]. >>>> For more options, visit this group at >>>> http://groups.google.com/group/neonixie-l?hl=en-GB. >>>> >>> >>> >>> >>> -- >>> Dalibor Farny >>> http://dalibor.farny.cz >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "neonixie-l" group. >>> To post to this group, send an email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/neonixie-l?hl=en-GB. >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "neonixie-l" group. >>> To post to this group, send an email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/neonixie-l?hl=en-GB. >>> >> >> >> >> -- >> Dalibor Farny >> http://dalibor.farny.cz >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To post to this group, send an email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/neonixie-l?hl=en-GB. >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To post to this group, send an email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/neonixie-l?hl=en-GB. >> > > > > -- > Dalibor Farny > http://dalibor.farny.cz > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > -- Dalibor Farny http://dalibor.farny.cz -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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