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This exhibit has no identification on the glass, but stamped into the anode rod is the code F353 which is the only information we have. An internet search produced no results.
The the flying leads connect to a filament and the top cap is an anode. The heavy metal shield is 40 mm in diameter and 54 mm long with a hole 19 mm in diameter.
Fortunately the adhesive holding the tube to the shield was degraded and the tube could be withdrawn. What is revealed is a simple X-Ray tube. The anode cut at 45 degrees directs the generated radiation out through the hole in the shield.
There is a target set into the copper rod and this could be tungsten or molybdenum.
Here the filament can be seen with a cup director around it. It looks to be pure tungsten and glows brightly at 2.0 V and draws 2.0 A. No higher voltage was used.
The wide glass tube envelope is 34 mm in diameter, and excluding the base wires is 120 mm tall.
Reference: Observation.


Updated March 25, 2019.
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