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Uranium/Clear Glass-Xenon Gas Filled Geissler Tube, New
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Uranium/Clear Glass-Xenon Gas Filled Geissler Tube, New
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T his is a new handmade xenon gas filled discharge tube 13 1/2" long by 1 1/2" in diameter, made with uranium glass and clear barium strontium glass tubing. This decorative display tube is made in the same tradition as old Geissler tubes, but with a modern twist. Uranium glass was used extensively in many of the Geissler discharge tubes made around the turn of the last century, and this modern tube's center sp is also made from old stock uranium glass tubing. Uranium oxide in the glass gives it a fluorescent greenish color that glows brightly when the tube is energized. Curiously, it's slightly radioactive, but completely harmless. The clear glass is a new lead-free barium strontium product with exceptional strength and clarity.
Another thing that sets this tube apart from antique Geissler tubes is the rare gas that it is filled with. Xenon, the rarest and heaviest of the stable noble gases, is used in this tube at a specific pressure that causes it to form a luminous thread-like discharge that can take on several different appearances, depending on the type of power supply used and how it is connected. The discharge can be very active and fast moving, or slowed down to an undulating crawl. The pictures show both effects, but many more can be produced by changing the frequency and power going to and through the tube. The tube is also touch sensitive, and will respond to your touch by concentrating the discharge at the point of contact. Another difference from the old Geissler tubes is the quality of the equipment used to process modern gas discharge tubes. This tube was vacuum pumped, heated and filled using modern two stage direct drive rotary vane vacuum pumps and filled with 99.995% pure xenon gas that will give it a lifetime measured in decades. It can be run continuously for many years without worrying about it going bad, as t is really nothing to burn out. This unusual one-of-a-kind glass sculpture looks great by itself and may be easily mounted on almost any surface, or built in to a custom application that calls for something really different and truly unique. Give that next steampunk project or science lab creation of yours a feature that will really make it stand out. It can be powered by several different methods, but a high-frequency high-voltage power supply or plasma driver works best. These may be obtained from Tech 22 ( ) Model# L-7020, or one can be supplied for an additional $80 with the purchase of this tube. You can also use or build a flyback power supply, or even hack the power supply out of a cheap imported plasma globe or lightning tube. Being handmade, and made one at a time, no two are alike and each one is dated, numbered and signed by the artist, with 30 years experience in glassblowing, plasma sculptures and neon lighting. The tube is guaranteed to operate flawlessly as long as the glass remains intact, providing many years of continuous operation and fascination. 
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