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Unknown tube of peculiar design

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Forum » Valves / tubes - Semiconductors » Very rare valves or unknown (not in RMorg) » Unknown tube of peculiar design
           
Peep Rada
Peep Rada
 
EST  Articles: 9
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03.Oct.16 17:22

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Accidentally I got a tube of rather peculiar design. I suspect it is some kind of sensor. There is no signs of company that made it, so it could be a prototype or member of very small production patch. 
It has only a handwritten number 87961 on it. 

Has anyone seen anything similar? What it could be? whe made these?

Here is a link to pictures:
 

Peep Rada
Peep Rada
 
EST  Articles: 9
Schem.:
Pict.: 12
03.Oct.16 20:54

Count of Thanks: 5
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There ware markings that I didn't notice before, and this tube appears to be russian made ФЭУ-35 

It is a photo multiplier, that is extremely sensitive light sensor, which is still used in astronomy, physics etc. 

read here for more about photo multipliers

So, case is closed. Thank you.

Otmar Jung
 
Editor
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03.Oct.16 21:40

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Here you can upload your photos: ФЭУ-35

  
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