Good job Jens! Molybdenum is not suitable for our purposes, it has low sputtering, but is very difficult to weld because of the high melting point. If You can get even lower sputtering with stainless steel electrodes in combination with mercury filled tube. This is the way how were the latest nixies made.. use just stanless steel electrodes first for the beginning. More info about sputtering is in the Weston's book.
I did an experiment with glow tube using soda glass and dumet wire, the electrodes were made from stainless steel, however the dumet were sticking out the seal into the tube, 5mm or so.. I run that tube for three weeks, tere were no signs of sputtering from the steel, but there formed a dark area around the dumet.. it made so large area that it formed a conductive layer and shortcircuited the supply, heated the tube and the tube cracked.. but I am sure the tube with steel only would last for long time.. Look on www.tubecrafter.com, Ron describes here a pinch welder what could be made for cheap, just a microwave transformer, rheostat and timing circuit (I may send a drawing), I placed some photos of mine on my blog in latest post. This stuff is really must.. I did some progress on my glass lathe, I should be able to rotate the stationary chuck soon.. Dalibor Farný http://dalibor.farny.cz sent from Samsung Galaxy Pad Dne 18.10.2012 10:55 "fixitsan" <[email protected]> napsal(a): > > First of all, well done ! Good work :) > > I know the digits are made of dumet wire, what plans do you have for > trying other materials ? > > I have read previously that molybdenum wire, or molybdenum coated elements > in tubes are often used. > Is something like this suitable I wonder ? I see it is being sold as an > electron tube related product / > > > http://www.ebay.co.uk/itm/Pure-Molybdenum-Wire-0-020-5mm-x-10ft-3m-/320555755603?pt=LH_DefaultDomain_2&hash=item4aa29ca853 > > > -- > 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]. > To view this discussion on the web, visit > https://groups.google.com/d/msg/neonixie-l/-/tIj6KA433zkJ. > 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
