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).
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