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Anyone recognize this tube?
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Old 2nd January 2011, 03:00 AM   #1
thebulbguy is offline thebulbguy  United States
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Default Anyone recognize this tube?

As part of moving I have been going through all my parts and storing them more effectively and I found this oddball in my random tubes box:

http://i.imgur.com/LM9cg.jpg

It has a standard intermediate base; the top electrode is a straight piece of wire in a uranium glass seal. It is difficult to see inside the bottom due to the blackening, but there is some sort of mesh structure near the base, and the glass appears to fold down inside the wide part at that line before it narrows into the spiral. The only markings are a yellow "26" and "MADE BY SYLVANIA", the others are all worn off. I have no idea where this guy came from but I would love to know what on earth it does.
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Old 2nd January 2011, 08:12 AM   #2
PedroDaGr8 is offline PedroDaGr8  United States
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I have no clue, maybe some sort of Geissler Tube? The structure definitely strikes me as some sort of gas-discharge tube.
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