At last someone with a lab smaller than mine, I recently moved house and aquired half a room for my 'shop, only problem is I still dont have time to use it.
On 20 Oct, 23:43, jb-electronics <webmas...@jb-electronics.de> wrote: > Hi, > > here are the pictures of one of the colon tubes (as always, air at 15mbar): > > http://www.jb-electronics.de/tmp/gl-ls-8_1.jpghttp://www.jb-electronics.de/tmp/gl-ls-8_2.jpg > > Sadly, the upper dot does not always light up. It was a silly idea to > parallel the two cathodes, next time I will have the two dots wired > seperately. > > Jens > > > > > Hi again, > > > here is a picture of my "lab" / desk. I do not have a separate room > > for my tube making, so I have to clean off the desk every time I need > > to work for the university. It does not take much time, and so it is > > actually an advantage because it forces me to keep my lab tidy. > > >http://www.jb-electronics.de/tmp/lab.jpg > > > See the t-connector? This will be replaced by a connector with an > > additional outlet (so 4 in total) for my needle valve. > > > I have been trying to build two colon tubes today, with some minor > > success. Will post pictures tomorrow. > > > Jens > > >> Hello! > > >> By the way, how do You measure the pressure in the system? You > >> mentioned the glow lamp is filled on 15mBar... > > >> Could You send a photo of the system You use for pumping and filling > >> the glow lamps? > > >> The capacitor welder You have will work well, it is not suitable for > >> welding materials with high melting temperature like tungsten and > >> molybdenum, but for steel, nickel and so it is very good! > > >> > The problem with stainless steel wire is that it outgasses; I have > >> a glow lamp with two stainless steel electrodes and it glows in a > >> white-ish blue color, very strange. Will post a picture later this > >> weekend if I don't forget. > >> the bluish color is not outgassing, outgassing is when the metal > >> releives trapped air, oxygen, CO2, moisture and so into vacuum, You > >> can avoid that by heating the wire into red for a minute or so just > >> before sealing and pumping.. Each metal behaves differently in > >> discharge - different voltages and so, so it could be because of that.. > > >> Dalibor > > >> Dne 19.10.2012 7:29, jb-electronics napsal(a): > >>> Hi guys, > > >>> thanks for your advice. I think the problem is the one Dalibor > >>> pointed out: with Dumet wire the sputtering is very high. Also, > >>> since I am using no noble gas (except for the less than 1 percent > >>> there is in ambient air), the cathodes are having a much harder time > >>> anyway. So for now I will not install these tubes in a permanent > >>> circuit since they would only last for a few hours. > > >>> I will wait for my needle valve (will be here any day now) and try > >>> with Neon (and some day with Argon, too, of course). The ignition > >>> voltage should be drastically lower, and the visibility should > >>> increase. > > >>> The problem with stainless steel wire is that it outgasses; I have a > >>> glow lamp with two stainless steel electrodes and it glows in a > >>> white-ish blue color, very strange. Will post a picture later this > >>> weekend if I don't forget. > > >>> Ah, by the way, I already have a small capacitor-based spot welder, > >>> and so far, for my purposes, it has served me well: > >>>http://www.robbe.de/welma-2000-punktschweissgeraet.html?___store=en > > >>> Jens > > >>>> Keep up the good work ! > > >>>> If you need have some DXF files (vector format) on the digits you > >>>> want, or a image of the whole set, in a raster format, throw in my > >>>> direction. I'm in good with a guy that owns a steel cutting laser. > >>>> 4000W of CO2 goodness. He'll run small jobs for me for nothing, as > >>>> long as I don't abuse it. That means pester him for work too often. > > >>>> I still want that "1 - 12" "tri-quad" tube. 3 anodes x 4 cathode > >>>> sets (of 3). > >>>> -- > >>>> 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. > >>>> To view this discussion on the web, visit > >>>>https://groups.google.com/d/msg/neonixie-l/-/q3kWShptdnYJ. > >>>> For more options, visithttps://groups.google.com/groups/opt_out.- Hide > >>>> quoted text - > > - Show quoted text - -- 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.
