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Registered Member #3490
Joined: Wed Dec 08 2010, 11:55PM
Location: The Granite State
Posts: 34
Please ignore my previous post,I dont know what happened. Anyone know of any practical use for these? Also does anyone know where I might be able to get a data sheet?I've seriously looked everywhere.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Grenadier wrote ...
I'll give mine away. ^^
Great, ill take 2 pweez.
I had some cool pictures of a normal vacuum rectifier being destroyed with 500ma across it,with 1ma being it's peak... But i guess they are gone. It was neat, it glowed blue like normal at first, which changed colors as the filament was annihilated It even made some new colors that where so beautiful, i dropped to my knees and cried.
Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780
this is one of several Helium-Cadmium laser tubes I have in my junk collection...
All I need to get is some 2kV 100mA current regulated power supply to get it to lase, and 30kV to trigger the tube once the cadmium in each cathodes reservoir has melted and cadmium vapor makes its route along the tube in order to maintain the plasma channel
Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780
the tube has one center anode and two cathodes
heated anode melt the cadmium to form vapor to get a plasma channel, and a special reservoir with a heater is used to provide helium to get energy transfer to cadmium ions and reach population inversion of energy levels
you have to heat the helium reservoir (it has a special permeable glass membrane which lets pass helium atoms when heated to a certain temperature) to get helium in the mix, but one second of time you heat the reservoir, you have enough helium for tens of hours of cadmium usage
when cadmium flows through plasma, it gets in some traps at the extremities of the cathodes and is thus lost...
what I intend to do with those is restore the anode reservoir by reversing polarity and heat the cathode getters till cadmium almost disappears, to get back to some 4000 hours of use originally specified
what I lack to restore them like I would want are high voltage BNC connectors and some powering means
they were mainly used in DVD wafer processing and 3-D resin printing techniques
with special optics they can emit ultraviolet light in the sub-300nm range
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Hrm...Reading all of this fills me with jealousy. The oldest thing i have is maybe a Variable capacitor, and it's not even that old to begin with I believe. I'll go get a picture of it just so i don't feel left out.
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Post Pics of Odd/Old Parts and/or Fancy Glowing Tubes.
It even made some new colors that where so beautiful, i dropped to my knees and cried.
