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ML-5666

 
    
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This relatively small cooled anode triode from STC has lost its type designation but thanks to Peter Yager it is known to be an ML-5666.
The connections are one for each end of the filament and two connections to the plate that holds the grid cage. Cooling would be by either external cooling fins or an external water jacket.
The wide metal tube envelope is 90 mm in diameter, the anode is 50 mm in diameter. Including the base pins the valve is 270 mm tall.
References: Datasheet & Peter Yager.

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
11.0
120
10,000
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 08, 2013.
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