Hey All, I agree- a big pinch seal with 10 wires, and 2 'dead' wires for supports would be easiest. Pinch seals of that size are also tricky- the tube must be carefully pre-shaped for the seal; just heating the open end of a round tube causes it to slump down the middle as the glass thickens up (under it's own surface tension...) As soon as I get some thinner tungsten pins, I'll try it out- The ones I have right now are too thick to bundle 10 together... You could certainly use some little beads for supports- you'd want to clean 'em in ultrasound to make sure there were no traces of the manufacturing clay/binder on the inside... You can't really put any chips or circuit boards inside tubes... Things have to be very pure, and able to withstand lots of heat.
The two books I refer to constantly for info are :Materials and Techniques for Electron tubes, by Walter Kohl, and -Materials and Processes of Electron Devices, by Max Knoll. If you can find them, these two old manuals will teach you everything you could ever want to know about vacuum tube manufacture... Google groups doesn't seem to have image hosting, or archives -I'll just host my pix somewhere soon ,and link 'em up here. Cheers- -Dylan On Jul 8, 3:29 pm, jb-electronics <webmas...@jb-electronics.de> wrote: > Hi folks, > > I especially like the internal construction of this lab sample, it does > not look terribly complicated (if I can tell, which I think I can't): > > http://www.jb-electronics.de/html/elektronik/nixies/n_rd125.htm > > Jens > > Am 08.07.2011 23:34, schrieb xdugef: > > > I had an idea the other day which may not be possible because of the > > heat involved in the making of a nixie or because of the conditions > > inside the tube once it's filled with gas but it were possible to > > include an ic inside the tube then you would beable to reduce the > > number external connections. > > > On 8 July, 14:27, David Forbes<dfor...@dakotacom.net> wrote: > >> On 7/8/2011 2:20 PM, James wrote: > > >>> How about a pinch seal with an inline row of wires? I've only ever > >>> made those with two wires, but I don't see why it would be that much > >>> more difficult to put 10+ wires through with an appropriate jig. > >>> Induction heating is easy, I built one of those a while back that I > >>> use for other things. As for the ceramic spacers, would glass work? I > >>> know you can get small glass craft beads, I can't say I've ever looked > >>> into it though. The glassblowing is the hard part, I can do a > >>> reasonable job of splicing and bending neon tube but even after much > >>> practice it's very difficult to get good consistent results. > >> The B5870 tube would be a good starting point for a design using a pinch > >> seal. > >> It has a zig-zag row of wires in the header, and the bottom of each digit > >> is > >> spot-welded to its wire, with no spacers or connecting wires needed. There > >> is a > >> single ceramic block at the top to hold the digits in place. > > >> After all, if you're trying to make it yourself, simplicity is valuable. > > >> -- > >> David Forbes, Tucson, AZ -- 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.
