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Electronic vacuum tube device not valve for identification

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Forum » In General » Electronic vacuum tube device not valve for identification
           
Kenneth Cooke
Kenneth Cooke
 
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10.Apr.21 14:46

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Electronic device housed in a vacuum tube but not a valve. Could it be a crystal for frequency setting?

No pins on the base just a single screw connection at base and the two wires coming out from the top.

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This article was edited 10.Apr.21 14:49 by Kenneth Cooke .

Nikolaus Löwe
Nikolaus Löwe
 
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10.Apr.21 17:00

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Mr Cooke,

you're right. It's a quartz crystal. The frequency is given to be 144 kc/s (kHz). The type is CR1902/59.

Crystals were often enclosed in evacuated glass vessels, to achieve long term stability. I've seen a similar unit inside a quartz clock, but it could also have been used in all kinds of rf oscillator or filter circuits.

You are not showing the base, or whatever is on the other end of the tube. Does the bakelite hold any pins or mounting arrangements that would fit a socket, or just a single screw?

Yours,

Nikolaus Loewe

 

 

This article was edited 10.Apr.21 17:01 by Nikolaus Löwe .

Kenneth Cooke
Kenneth Cooke
 
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11.Apr.21 09:32

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Thank you Mr Loewe,

Attaced is a picture of the base. It has only a single screw with a nut. Is this only for mounting or does it have an internal conection, perhaps an earthing point?

Ken

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