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All that is known about this valve is that it is a very early two grid valve. The base and screw terminals place this as more of an experimental device, but we are not sure.
The balloon envelope is 50 mm in diameter and, from tip to tip is 124 mm tall.
References: Private communication.


Updated January 08, 2013.
shape:balloon construction:pinch type:tetrode base: pin:
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