Really large plasma tubes
zrg, Sun Apr 26 2015, 03:52PMFinally had first light of this thing. 7' 4" (2200 mm) plasma tube, 270 mm diameter. Over 30 kg of borosilicate glass evacuated and then filled with proper inert gas mix. Power supply is a homemade proper high voltage ferrite transformer and a halfbridge from mains. Power consumption is about 300W.
5 more similar size tubes with different colors (green, red, yellow, turquoise, multicolored) to go. Will post updates when/if they're done, but that's not soon, such glass things are too difficult to work with
Re: Really large plasma tubes
Kizmo, Sun Apr 26 2015, 04:17PM
Very cool! I would love to have one but i think they are too difficult to ship
Kizmo, Sun Apr 26 2015, 04:17PM
Very cool! I would love to have one but i think they are too difficult to ship
Re: Really large plasma tubes
Dr. H., Sun Apr 26 2015, 05:43PM
Beautifuuuul :)
Do you mind shearing what the gas mixtures are
Hope to see the other colors soon.
Can you modulate the length of the discharge to some point ? If so you can make something like a giant discharge VU meter.
Cheers
Dr. H., Sun Apr 26 2015, 05:43PM
Beautifuuuul :)
Do you mind shearing what the gas mixtures are
Hope to see the other colors soon.
Can you modulate the length of the discharge to some point ? If so you can make something like a giant discharge VU meter.
Cheers
Re: Really large plasma tubes
teravolt, Mon Apr 27 2015, 01:36PM
do you plan to sell these
teravolt, Mon Apr 27 2015, 01:36PM
do you plan to sell these
Re: Really large plasma tubes
Mads Barnkob, Mon Apr 27 2015, 06:10PM
That does indeed look sweeter than sweet!
I think I can see 3 seams, so you glass welded these together from 4 different pieces?
Is there only a small discharge terminal at the bottom of the tube? I am not sure if it is just the reflections showing a blue glow at the top.
Mads Barnkob, Mon Apr 27 2015, 06:10PM
That does indeed look sweeter than sweet!
I think I can see 3 seams, so you glass welded these together from 4 different pieces?
Is there only a small discharge terminal at the bottom of the tube? I am not sure if it is just the reflections showing a blue glow at the top.
Re: Really large plasma tubes
zrg, Tue Apr 28 2015, 12:00AM
This one made from two pieces.
Single terminal at the bottom.
Here are some photos made during evacuation and filling.
zrg, Tue Apr 28 2015, 12:00AM
Mads Barnkob wrote ...
That does indeed look sweeter than sweet!
I think I can see 3 seams, so you glass welded these together from 4 different pieces?
Is there only a small discharge terminal at the bottom of the tube? I am not sure if it is just the reflections showing a blue glow at the top.
That does indeed look sweeter than sweet!
I think I can see 3 seams, so you glass welded these together from 4 different pieces?
Is there only a small discharge terminal at the bottom of the tube? I am not sure if it is just the reflections showing a blue glow at the top.
This one made from two pieces.
Single terminal at the bottom.
Here are some photos made during evacuation and filling.
Re: Really large plasma tubes
Intra, Tue Apr 28 2015, 12:50PM
Magic... *_____*
Intra, Tue Apr 28 2015, 12:50PM
Magic... *_____*
Re: Really large plasma tubes
klugesmith, Tue Apr 28 2015, 05:54PM
Magnificent work. Are they for museums, or fairs, or just your friends?
klugesmith, Tue Apr 28 2015, 05:54PM
Magnificent work. Are they for museums, or fairs, or just your friends?
Re: Really large plasma tubes
zrg, Tue May 05 2015, 06:06PM
Tube was presented at the local science-related festival for children, along with same size green-white, and smaller red and yellow ones, and other our stuff (plasma balls, jacob ladder, tesla coil, even smaller tubes etc). Some nice photos, oh yeah. Everybody likes nice photos, I hope. Sorry for direct link images, uploading somehow shows an error message and doesn't work today for me.
All mentioned
zrg, Tue May 05 2015, 06:06PM
Tube was presented at the local science-related festival for children, along with same size green-white, and smaller red and yellow ones, and other our stuff (plasma balls, jacob ladder, tesla coil, even smaller tubes etc). Some nice photos, oh yeah. Everybody likes nice photos, I hope. Sorry for direct link images, uploading somehow shows an error message and doesn't work today for me.
klugesmith wrote ...
Magnificent work. Are they for museums, or fairs, or just your friends?
Magnificent work. Are they for museums, or fairs, or just your friends?
All mentioned
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